Al and Pete Fuschion - First Sounds

[XfireZ51]

I can tell you the overall sound is that of a very ANGRY car with an aggressive throttle. Reminds me of my Chow Bear when sensing danger. It has a throatiness and some of the rasp of the Corsa but at a much deeper level. SOTP feels significant for whatever that is worth. Throttle is very responsive. It was a cold day so tires really couldn't bite. Second gear punch at 3500 and car was going sideways. I kept the ASR ON.

MagnaFlow here:
http://i187.photobucket.com/albums/x198/Z51Xfire/th_IMG_00321.jpg (http://s187.photobucket.com/albums/x198/Z51Xfire/?action=view&current=IMG_00321.mp4)


And then the DynoMax w Z06 tips after Dr. A. Dashto's radical surgery assisted by Dr. P. Polatsidis;

http://i187.photobucket.com/albums/x198/Z51Xfire/th_Z06Tips.jpg (http://s187.photobucket.com/albums/x198/Z51Xfire/?action=view&current=Z06Tips.mp4)

[Blue Flame Restorations]

Sounds smooth and low. Nice.

[GOLDCYLON]

Whats the RPM at idle ? Rosa sounds pissed off

[XfireZ51]

Whats the RPM at idle ? Rosa sounds pissed off

750-825. I'm pretty sure I'll need to do a re-tune just not sure how extensive. I should have brought my scanner and data logged the ride home. Then recalc VE.

[GOLDCYLON]

Sounds agressive Pete

[4-cam]

Sounds great Dom, How does she sound out on the road with the valve open? Any Drone? I'm looking to do something similar with my exhaust sans the flapper valve.

[Pete]

Different tips make different sound.
Al has same set up with B&B tips sounds different then ZO6 tips.
We will have to post sound clip of Al's set up.

Pete

[Locobob]

Sounds really good :cheers:

[HAWAIIZR-1]

Dom/Al/Pete,

I'm truly lost for words and all I had was a grin from ear to ear listening to the system. WOW! Love it! Friggin awesome...............Thanks for taking the time to share all this info. :cheers:

[Paul Workman]

Well...That settles it!! :thumbsup:

Now to see what HP gain (if any) it buys you. Can't wait!

:cheers:

P.

[XfireZ51]

Well...That settles it!! :thumbsup:

Now to see what HP gain (if any) it buys you. Can't wait!

:cheers:

P.

Paul,

Maybe I'll start a Dyno Run Fund. ;)

[Pete]

Paul,

Maybe I'll start a Dyno Run Fund. ;)


I'm in for $10.

Pete

[XfireZ51]

Dom/Al/Pete,

I'm truly lost for words and all I had was a grin from ear to ear listening to the system. WOW! Love it! Friggin awesome...............Thanks for taking the time to share all this info. :cheers:

Craig,

Glad you enjoyed it. Lucky I drove the car home yesterday. Today roads sucks w snow and ice. THAT would have been interesting!! BRRRRRRRR.

[XfireZ51]

Here's a quick summary of what this system costs to replicate:

DynoMax 17228 @87. 174
Z06 tips w flapper 170
SW Xpipe 350
3" SS pipes. 300

So about 1k + install. Doesn't
hurt as much if done piecemeal.
Not including headers.

[Blue Flame Restorations]

Pete, sign me up but I need a center exit custom fit to my design bumper outlet.

[Pete]

Pete, sign me up but I need a center exit custom fit to my design bumper outlet.

No poblem,we'll get her done.

Pete

[Blue Flame Restorations]

No poblem,we'll get her done.

Pete


I just have to get off the dime and go full steam ahead in Chicago. Next month will do it all.

4:10's
Hurst shifter
Port/polish
Exhaust
Brake upgrade
Powder Coat

We'll make this thing run so I can cut the top off of it.......

[HAWAIIZR-1]

Different tips make different sound.
Al has same set up with B&B tips sounds different then ZO6 tips.
We will have to post sound clip of Al's set up.

Pete

Pete/Dom/Al/others,

What is your opinion on the double walled versus single walled tips and the different styles, sizes? I'm on the fence to cut off the B&Bs to put them on the Dynomax 17228s. Looking at maybe something similar to the Z06s in a 4" double walled style.

Thanks in advance.

Craig

[HAWAIIZR-1]

I'm in for $10.

Pete

I'm in for $10 too; this really helped me out with some decisions. :cheers:

[XfireZ51]

Craig,

As Pete pointed out, we think the double wall makes

a difference in the sound and probably toning it down reducing resonance more so than the single wall B+B tips. Pete has the B+B tips on his, while Bob G and myself now have the Z06 "trumpets". In fact, Al and Pete thought my 5.7L sounded like BobG's 7.4L. I had considered cutting the tips off my MFlow muffs (I like the looks of those too) but would rather go ahead and sell them instead of hacking them up. Besides the flapper mechanism was already an integral part. It's also my opinion that the Z06 tips look as if they would have come stock on a
ZR-1 as I think the wheels do too. Now what I am hearing and feeling is the motor thru as close to a 3" exhaust as you can get and still be able to converse and listen to the radio at cruise. Don't get me wrong this isn't a quiet system, but it's the kind of system you could drive and just listen to. But boy when you hit the accelerator and the flaps open, you absolutely know it.
When the weather gets better I may ask =Jeff= or PW to help record a flyby at full bore. Al took it out from his shop while Pete and I stood by to listen and you could here it going down the street and Al having to back off due to tire spin.

[Pete]

Now what I am hearing and feeling is the motor thru as close to a 3" exhaust as you can get and still be able to converse and listen to the radio at cruise. Don't get me wrong this isn't a quiet system, but it's the kind of system you could drive and just listen to. But boy when you hit the accelerator and the flaps open, you absolutely know it.
When the weather gets better I may ask =Jeff= or PW to help record a flyby at full bore. Al took it out from his shop while Pete and I stood by to listen and you could here it going down the street and Al having to back off due to tire spin.

This is a no frills exhaust just the basics long tube headers,full 3" pipes,X-pipe,no CATS.

This exhaust is all business but tame enough it won't give you a headache.
It's a beauty and the beast exhaust.

Pete

[Blue Flame Restorations]

It's a beauty and the beast exhaust.

Pete

Still a B&B exhaust then, right?:o


Sorry, couldn't resist. I'm stepping away from the keyboard......................:bootyshak

[HAWAIIZR-1]

Dom/Pete,

Thanks for clarifying and it makes sense about the double walled tips. If I remember correctly the B&B are only rolled edge but still a single wall design. Darn, those Z06 might be harder to find, cut off and then shipped to me and also wondering about how to connect the flapper on the 90MY where the charcoal cannister is in the front and not the rear; not sure what vacuum sources are easy to tap into. I like the Mr. Gas 4" tips that are double walled. I might not mind just a beast, but touring long distance when I do could drive me crazy or give me a headache. Thanks for all the input and guidance.

[HAWAIIZR-1]

Still a B&B exhaust then, right?:o


Sorry, couldn't resist. I'm stepping away from the keyboard......................:bootyshak

Good catch!!

[XfireZ51]

Dom/Pete,

Thanks for clarifying and it makes sense about the double walled tips. If I remember correctly the B&B are only rolled edge but still a single wall design. Darn, those Z06 might be harder to find, cut off and then shipped to me and also wondering about how to connect the flapper on the 90MY where the charcoal cannister is in the front and not the rear; not sure what vacuum sources are easy to tap into. I like the Mr. Gas 4" tips that are double walled. I might not mind just a beast, but touring long distance when I do could drive me crazy or give me a headache. Thanks for all the input and guidance.

If you notice the prototype B+B that LB posted have the B+B shape tips but they are double walled.
BTW, nothing against the Dr. Gas stuff but the tips alone are $60 ea. You could find complete Z06 tips w flappers for that or a bit more.

[HAWAIIZR-1]

If you notice the prototype B+B that LB posted have the B+B shape tips but they are double walled.
BTW, nothing against the Dr. Gas stuff but the tips alone are $60 ea. You could find complete Z06 tips w flappers for that or a bit more.

Dom,
Yes, I noticed that and those are very nice....but I don't even dare ask them how much. It seems to be the going price of high quality double walled tips but, yes I am considering that with the total price of tips in mind. I'll still in search mode, but also have to figure out how to tie in the flappers or go electronic control (even more cost). Thanks again for all your help. :cheers:

[XfireZ51]

Craig,

Flappers are connected via vacuum line running to the D/S plenum port. You could run a separate "hard line" (plastic) to the rear of the car and then T to both flappers. I'm going to look into an ECM control we might use to energize a solenoid which would then allow vacuum and activate the flappers. With larger cams this would help control valves from flapping open/closed when larger cams are used resulting in oscillating idle vacuum.
Could be dictated by TPS v or %.

[HAWAIIZR-1]

Craig,

Flappers are connected via vacuum line running to the D/S plenum port. You could run a separate "hard line" (plastic) to the rear of the car and then T to both flappers. I'm going to look into an ECM control we might use to energize a solenoid which would then allow vacuum and activate the flappers. With larger cams this would help control valves from flapping open/closed when larger cams are used resulting in oscillating idle vacuum.
Could be dictated by TPS v or %.

Dom,

Thanks for the explanation in terms that even I can understand. I'll look into the Z06 tips to see what I can find and make a decision with all things considered. I love how your car sounds and it sure is both wicked and nasty sounding at the same time. :handshak:

[RICKYRJ1]

Anybody ever check out the Akropovic system/ tips? some of the Z06 guys run it

[XfireZ51]

From: John Heinricy
Sent: Sunday, February 12, 2012 10:40 AM
To: 'Dominic Sorresso'
Subject: RE: Z06 exhaust tips on ZR-1

Nice job.

From: Dominic Sorresso [mailto:surrexi2@comcast.net (surrexi2@comcast.net)]
Sent: Saturday, February 11, 2012 5:46 PM
To: 'John Heinricy'
Subject: RE: Z06 exhaust tips on ZR-1

John,

Thought you might get a kick out of seeing this. I finally scored a set of Z06 muffler tips w flapper valve and we installed them on
a pair of DynoMax 17228 Ultra-Flows. I think the muffs and tips make the LT-5 sound pretty nasty. I would welcome your reaction.

http://youtu.be/CcjSzOvAYyk (http://youtu.be/CcjSzOvAYyk)

Regards,

Dominic Sorresso
Dominic J. Sorresso
President/Franchise Owner
Windy City Coaching, Ltd.
dba Advicoach-Midwest
"Coaching business owners to work ON their business, not in it!"
630.240.5214 (C)
630.837.7956 (HO)
djsorresso@comcast.net (djsorresso@comcast.net)
http://www.linkedin.com/in/djsorresso (http://www.linkedin.com/in/djsorresso)
http://www.advicoach.com/dsorresso (http://www.advicoach.com/dsorresso)

[XfireZ51]

In case anybody wants a set of tips.

http://losangeles.craigslist.org/lac/pts/2818645585.html

[mike100]

In case anybody wants a set of tips.

http://losangeles.craigslist.org/lac/pts/2818645585.html

Maybe I'm going for a drive today.

[HAWAIIZR-1]

Maybe I'm going for a drive today.

I called the guy just in case you don't buy them and he does not want to cut off and sell just the tips. I'll keep looking. Thanks Dom!

[HAWAIIZR-1]

From: John Heinricy
Sent: Sunday, February 12, 2012 10:40 AM
To: 'Dominic Sorresso'
Subject: RE: Z06 exhaust tips on ZR-1

Nice job.





You're right, no better endorsement than from the "Man" himself.

[HAWAIIZR-1]

Anybody ever check out the Akropovic system/ tips? some of the Z06 guys run it Thanks for sharing Rick, these are cool and worth looking into.........pricey I'm sure.

[XfireZ51]

I called the guy just in case you don't buy them and he does not want to cut off and sell just the tips. I'll keep looking. Thanks Dom!

Offer him $170 and have somebody local pick them up and cut them. Maybe Ccmano or someone else in the LA area.
BTW, there's another set on Craigslist for $170.

[Kevin]

Doesn't Heinricy work for hennesey now?

[-=Jeff=-]

Went for a ride in Dom's car today.. Other then him pulling a Lee on the ride, the exhaust sounds AWESOME.. I want it now too

[XfireZ51]

Doesn't Heinricy work for hennesey now?

I believe he has his own consulting company. Hoping he comes to Gathering. Told him to look for big motor home that smells like sausage. ;)

Just a little background on John Heinricy. He had a set of Z06 mufflers for sale. I contacted him
not knowing who the seller was at first. When I got his response, I realized who he was. He graciously offered his Z06 muffs when I told him what the FBI did with them. But I couldn't bring myself to "hacking up" Heinricy's mufflers. He understood and thought we were being inventive w our solution. That's why I sent him a vid of the exhaust when we finished it up.
Cool. Hope he like sausage. ;)

[Pete]

I believe he has his own consulting company. Hoping he comes to Gathering. Told him to look for big motor home that smells like sausage. ;)

Just a little background on John Heinricy. He had a set of Z06 mufflers for sale. I contacted him
not knowing who the seller was at first. When I got his response, I realized who he was. He graciously offered his Z06 muffs when I told him what the FBI did with them. But I couldn't bring myself to "hacking up" Heinricy's mufflers. He understood and thought we were being inventive w our solution. That's why I sent him a vid of the exhaust when we finished it up.
Cool. Hope he like sausage. ;)


Everybody likes the Greek sausage.

Pete

[WB9MCW]

Very nice Dom -- Sweet Sound for sure.

[HAWAIIZR-1]

Dom and Pete,

You guys killed me with the whole sausage thing...........

[HAWAIIZR-1]

Offer him $170 and have somebody local pick them up and cut them. Maybe Ccmano or someone else in the LA area.
BTW, there's another set on Craigslist for $170.

Thanks for your thoughts and I'll check out some options and monitor Craiglist around the world too. Actually, I should post in CF C6 parts wanted.:cheers:

[1990 quasar blue]

Offer him $170 and have somebody local pick them up and cut them. Maybe Ccmano or someone else in the LA area.
BTW, there's another set on Craigslist for $170.

Any chance of getting that link? Or location and I'll look it up myself. Thanks.

[XfireZ51]

Any chance of getting that link? Or location and I'll look it up myself. Thanks.

http://losangeles.craigslist.org/lac/pts/2818645585.html

[1990 quasar blue]

BTW, there's another set on Craigslist for $170.

Sorry. I thought this meant there was another set in addition to the ones in California. Thanks.

[XfireZ51]

Sorry. I thought this meant there was another set in addition to the ones in California. Thanks.

There was but not there any longer. Keep looking.

[HAWAIIZR-1]

Just curious why Flowmaster Super 44 or 40 Series Delta Flow never came into the picture with the ZR-1 folks?

A bunch of other folks I know swear by them and curious from this group.

[1990 quasar blue]

Just curious why Flowmaster Super 44 or 40 Series Delta Flow never came into the picture with the ZR-1 folks?

A bunch of other folks I know swear by them and curious from this group.

http://www.corvetteactioncenter.com/kb/questions/311/1992+-+1996:+Tech+Article:+Quietly+Powerful:+How+to+Buil d+a+C4+LT1{47}4{47}5+Exhaust+that+Gains+28+hp+and. ..is+Quiet


Hib uses Delta fifties. They're not forties but the closest that I know of.

Sorry I can't get the link to work. You can find it here in the how to section.

[Pete]

http://www.corvetteactioncenter.com/kb/questions/311/1992+-+1996:+Tech+Article:+Quietly+Powerful:+How+to+Buil d+a+C4+LT1{47}4{47}5+Exhaust+that+Gains+28+hp+and. ..is+Quiet


Hib uses Delta fifties. They're not forties but the closest that I know of.

Sorry I can't get the link to work. You can find it here in the how to section.

I don't think Flowmaster fifties will outflow the Dynomax 17228.
With the Dynomax's price you get a stainless muffler.
Dynomax is straight thru muffler.
Flowmaster is a chambered muffler.

Flowmasters were good 30 years ago 1980's technology,heck Marc H. mentioned he gains 20 hp unbolting his Flowmaster Delta mufflers.
Most mufflers/exhaust systems out there are more for looks and sound then performance.
Prime example Borla system we come to find out Borla's don't flow worth a
cr@p (cr@p).


Technology keeps moving forward.
Pete

[Pete]

http://www.corvetteactioncenter.com/kb/questions/311/1992+-+1996%3A+Tech+Article%3A+Quietly+Powerful%3A+How+t o+Build+a+C4+LT1%7B47%7D4%7B47%7D5+Exhaust+that+Ga ins+28+hp+and...is+Quiet


Back in the day Flowmaster advertised that system 75hp gain,what a crock that was.

Pete

[HAWAIIZR-1]

All,

Thanks for the replies about Flowmasters and I noticed that they won't talk about flow numbers on their website. I was just curious about them an also noticed a few folks on you tube that replaced their various Flowmasters for Dynomax Ultra Flos. My favorite is this Chevelle and there is a comparison with the FMs on related videos that show up. I'm sold.........................:cheers:

http://www.youtube.com/watch?v=-gGThRPrXTo

[Paul Workman]

Dom/Pete/ et al...

I too was curious about an electrical option - AND...in case there is a "rush" on the Z06 tips (now that the cat is out of the bag;)), I ran across several electrically controlled "flapper" gates on Summit, and got an idea...

Some background: In my wasted youth I had a Honda 305 Super Hawk (motorcycle) with straight pipes except for manually controlled flappers near the tips of the dual pipes. They worked incredibly well!

These gates had a hole in the center; looked like a common steel machine washer. They were controlled with a little external knob, spring and detent setup. A quarter turn opend or "closed" the flapper. With the gate "closed", the muffling effect was remarkable; about the same as if it had a stock muffler on it. But, open the gates, and it was a motorcycle with straight pipes, no mistaking that!

So, regarding our cars, it occured to me that assuming 3" pipes (for example)a 3" gate installed ahead of the muffler (an electrically controlled gate at that) with the appropriate size hole through it could be an option to consider as well.

But, why mess with success, right? Well, just an idea I thought I'd toss out there as an option to tuck away as possibly another way to skin the cat. And, if it worked as well as it did on the motorcycle, the "quiet" mode might be considerably quiter than the open mode. But! You heard it here first!;)

Oh... And, less anyone be confused; Pete cooks Italian sausages on the grill. If he offers you some Greek sausage...it is and entirely different offer!!:jawdrop:

P.

[1990 quasar blue]

I don't think Flowmaster fifties will outflow the Dynomax 17228.
With the Dynomax's price you get a stainless muffler.
Dynomax is straight thru muffler.
Flowmaster is a chambered muffler.

Flowmasters were good 30 years ago 1980's technology,heck Marc H. mentioned he gains 20 hp unbolting his Flowmaster Delta mufflers.
Most mufflers/exhaust systems out there are more for looks and sound then performance.
Prime example Borla system we come to find out Borla's don't flow worth a
cr@p (cr@p).


Technology keeps moving forward.
Pete

I completely agree. I just posted the link because Craig asked about them. I believe as far as power goes, you guys have got the system. I can't wait to see the final tuned results.

[HAWAIIZR-1]

I completely agree. I just posted the link because Craig asked about them. I believe as far as power goes, you guys have got the system. I can't wait to see the final tuned results.

Thanks for the reminder. Those Dynomax Ultra Flos are the best sounding (performing too I'm sure) so far that I have heard to date. I'm sure it sounds even better in person.

[HAWAIIZR-1]

Dom/Pete/ et al...

I too was curious about an electrical option - AND...in case there is a "rush" on the Z06 tips (now that the cat is out of the bag;)), I ran across several electrically controlled "flapper" gates on Summit, and got an idea...

Some background: In my wasted youth I had a Honda 305 Super Hawk (motorcycle) with straight pipes except for manually controlled flappers near the tips of the dual pipes. They worked incredibly well!

These gates had a hole in the center; looked like a common steel machine washer. They were controlled with a little external knob, spring and detent setup. A quarter turn opend or "closed" the flapper. With the gate "closed", the muffling effect was remarkable; about the same as if it had a stock muffler on it. But, open the gates, and it was a motorcycle with straight pipes, no mistaking that!

So, regarding our cars, it occured to me that assuming 3" pipes (for example)a 3" gate installed ahead of the muffler (an electrically controlled gate at that) with the appropriate size hole through it could be an option to consider as well.

But, why mess with success, right? Well, just an idea I thought I'd toss out there as an option to tuck away as possibly another way to skin the cat. And, if it worked as well as it did on the motorcycle, the "quiet" mode might be considerably quiter than the open mode. But! You heard it here first!;)

Oh... And, less anyone be confused; Pete cooks Italian sausages on the grill. If he offers you some Greek sausage...it is and entirely different offer!!:jawdrop:

P.

http://i78.photobucket.com/albums/j86/hawaiizr1/DCP_0768.jpg

P,

You are talking about something like this that Marc shows on his car or a customer's? I thought about this too and not sure how it sounds and wondering if I would like this or not. I wish I could hear a sounds clip of this. I hear what you are saying an not that easy to get the Z06 tips after all, but I'm sure in time.

[Paul Workman]

http://i78.photobucket.com/albums/j86/hawaiizr1/DCP_0768.jpg

P,

You are talking about something like this that Marc shows on his car or a customer's? I thought about this too and not sure how it sounds and wondering if I would like this or not. I wish I could hear a sounds clip of this. I hear what you are saying an not that easy to get the Z06 tips after all, but I'm sure in time.

That (pictured) is an option too. And, if you want to take it a step further, if there was a judicious length of pipe attached to the "Y" between the Y and the gate, one would have achieved what is called "stub tuning" (you may be familiar). This is another option which could go a long way toward killing resonance - or at least significantly reducing it, without impeding performance. (I've had discussions and seen some articles on this, but as yet to hear one in operation. However, my curiosity is piqued!!)

But, to answer your question, NO. Picture the gates being in series - no Y junction - with a certain size hole in the gate to allow flow in the "quite mode", and of course wide open when switched on.

I just can't get past the sound the Z06 tips/flappper/Dynomax combo makes tho... As they used to say in So Cal (when I lived there) they're BITCHEN!!

P.

[HAWAIIZR-1]

That (pictured) is an option too. And, if you want to take it a step further, if there was a judicious length of pipe attached to the "Y" between the Y and the gate, one would have achieved what is called "stub tuning" (you may be familiar). This is another option which could go a long way toward killing - or at least significantly reducing it, without impeding performance. (I've had discussions and seen some articles on this, but as yet to hear one in operation. However, my curiosity is piqued!!

But, to answer your question, NO. Picture the gates being in series - no Y junction - with a certain size hole in the gate to allow flow in the "quite mode", and of course wide open when switched on.

I just can't get past the sound the Z06 tips/flappper/Dynomax combo makes tho... As they used to say in So Cal (when I lived there) they're BITCHEN!!

P.

I hear you and understand now. Don't mess with perfection............

[-=Jeff=-]

I have to wonder of QTP would be willing to sell just the gates sans the electric motors. then you could make your own Vacuum setup.

Although it would be cool to have the electrics if you could get them to work based off of throttle..

YEs the Z)6 mufflers are somewhat hard to find, but we are actually looking for RPO NPP which was avail on Z06, ZR1 and GS as well as an option on regular cars now.

I think if we could find the shaft and Blade int he size needed it would not take much to make them

[XfireZ51]

What about re-purposing the secondary throttle. Maybe Carter could make up a
flange w the shaft and butterfly installed. Then add actuators like old vacuum advance cannisters. Although exhaust environment will be tougher than distributor.

[-=Jeff=-]

What about re-purposing the secondary throttle. Maybe Carter could make up a
flange w the shaft and butterfly installed. Then add actuators like old vacuum advance cannisters. Although exhaust environment will be tougher than distributor.

I found a shaft & butterfly kit in 2.25, 2.5 and 3 just need the ID of the Tips to know which one to buy

Vacuum Actuator would be easy to find, then make a arm for the shaft for open close and mock it up

[Paul Workman]

I think a sample of the TPS voltage to an OP amp driving the electrically operated gates...is a very possible alternative, should the vacuum gates prove difficult or expensive to attain. Hmmmm.... Do I hear an article for the next issue of the Registry coming up? Or, maybe a "show and tell" seminar for the BG gathering????
:dancing

P.

[HAWAIIZR-1]

I have to wonder of QTP would be willing to sell just the gates sans the electric motors. then you could make your own Vacuum setup.

Although it would be cool to have the electrics if you could get them to work based off of throttle..

YEs the Z)6 mufflers are somewhat hard to find, but we are actually looking for RPO NPP which was avail on Z06, ZR1 and GS as well as an option on regular cars now.

I think if we could find the shaft and Blade int he size needed it would not take much to make them

Jeff,

Thanks for the tip about the NPP and I see that there is a lot more available. They all want too much, but obviously some can get lucky to get a decent deal on them. There is one speed shop in CT that is trying to buy all that he can find so I might just give up on the NPP option.

[ScottZ95ZR1]

There's an old thread from 2005 on the other forum where Ken Reeves modified his B&B and here are a couple pics of his set-up.
Here's a link to his thread: http://forums.*************.com/c4-zr-1-discussion/1117714-b-and-b-resonance-fix.html?forum_id=50&ref=esp-link
Of course you will have to edit the URL in your browser because reference to that forum disallowed here. :icon_scra

http://i531.photobucket.com/albums/dd353/scottcollier/Misc/VacuumControl1.jpg
http://i531.photobucket.com/albums/dd353/scottcollier/Misc/Baffle2.jpg

[HAWAIIZR-1]

There's an old thread from 2005 on the other forum where Ken Reeves modified his B&B and here are a couple pics of his set-up.
Here's a link to his thread: http://forums.*************.com/c4-zr-1-discussion/1117714-b-and-b-resonance-fix.html?forum_id=50&ref=esp-link
Of course you will have to edit the URL in your browser because reference to that forum disallowed here. :icon_scra

http://i531.photobucket.com/albums/dd353/scottcollier/Misc/VacuumControl1.jpg
http://i531.photobucket.com/albums/dd353/scottcollier/Misc/Baffle2.jpg

Thanks for sharing.:handshak: Actually, I wish there were a low cost way to gut out my B&Bs to remove the restrictor plate in the version 3 mufflers and I would just put the X pipe on and call it a day. This is a cool, low cost looking more for the person with talent and equipment to mod themself.

[XfireZ51]

http://forums.*************.com/c6-parts-for-sale-wanted/3001384-z06-mufflers.html

Looks like a vacuum advance cannister would work based on the above pics.

[-=Jeff=-]

I have ordered 2 Vacuum advance Actuators like above.. they were $4.53 ea

[XfireZ51]

The link I posted is for 2 sets of Z06 muffs here in Chicago.

[-=Jeff=-]

Yeah I PM'ed him

[1990 quasar blue]

I have to wonder of QTP would be willing to sell just the gates sans the electric motors. then you could make your own Vacuum setup.

Although it would be cool to have the electrics if you could get them to work based off of throttle..

YEs the Z)6 mufflers are somewhat hard to find, but we are actually looking for RPO NPP which was avail on Z06, ZR1 and GS as well as an option on regular cars now.

I think if we could find the shaft and Blade int he size needed it would not take much to make them

I want to be sure so, at the risk of sounding a little slow. Will the npp tips off a non zo6 work just as well?

[-=Jeff=-]

I think they would as they too are vacuum controlled to my knowledge anyway

[XfireZ51]

I think they would as they too are vacuum controlled to my knowledge anyway

Stock C6 tips not bi-modal. The C6 muffs are single exit and split into 2 tips. They're really not close. However, GS uses bi-modals also.

Actually looking at the tips they look similar.
SET OF CORVETTE C6 FACTORY EXHAUST MUFFLERS 2005-12

[-=Jeff=-]

Stock C6 tips not bi-modal. The C6 muffs are single exit and split into 2 tips. They're really not close. However, GS uses bi-modals also.

Correct but RPO Option NPP is for Bi-modal exhaust on regular cars.. GS/AR1 and Z06 I believe have Bi-modal standard

http://www.vetteweb.com/features/vemp_0804_2008_chevrolet_corvette/photo_12.html

Q: What is the NPP Dual Mode Exhaust Option and how does it work??
NPP is the Regular Production Option (RPO) code for the Dual Mode Exhaust Option first offered to non-Z06 Corvettes in 2008 as an $1195 option. LS3 engines equipped with NPP get a bump in horsepower rating from 430 to 436. Modeled after the exhaust on the Z06, the exhaust uses a butterfly valve over one of the exhaust exit pipes (two total, one per muffler) to vary the exhaust output. It works similar to exhaust cut-outs popular on the street rods.

http://www.grandsportregistry.com/images/npp-100.jpg (http://www.grandsportregistry.com/images/npp-640.jpg)
The exhaust control is operated by engine vacuum pressure. The system is tied to the pcm and monitors rpm and throttle position to measure "driver intent". Under normal circumstances the exhaust valve is closed and it routes the exhaust gas out of the other pipe after it passes through the baffle chamber of the exhaust. In this case it is quieter. If the driver accelerates hard the valves will open at 2,800 rpm as long as the driver is above 80% throttle. Between 30% and 80% throttle the exhaust will open during acceleration at 3,500 rpm.

The valves will be open for the first two seconds that the car is started. It requires time for the vacuum pressure to build to close the valves. After that The operation of the NPP is normally closed, open on demand. Have someone stand behind the car and bring up the RPM to 3,500 and you should see the valves open. The butterfly operation is tied to the throttle position sensor and the RPM. It uses the throttle position to determine driver intent.

Under normal operation the valves work as follows:



Below 30% throttle and 3,500 rpm the valves are closed
Above 30% throttle and 3,500 rpm the valves will open
Between 30% throttle and 80% throttle and above 3,500 rpm the valves are open
Above 80% throttle and above 2,800 rpm the valves are open




http://www.grandsportregistry.com/images/npp-640.jpg

[1990 quasar blue]

Upon further investigation it seems that the difference is the npp has perforated tips and the z06 tips are solid. Btw these all seem to be getting more expensive by the day.

[-=Jeff=-]

Upon further investigation it seems that the difference is the npp has perforated tips and the z06 tips are solid. Btw these all seem to be getting more expensive by the day.

Yeah cause everybody wants them. 3 years ago you could get a pair for $50
LOL

I have a solid idea to try, but it does not include the tips.. it is very close to the pictures posted earlier in the thread. if I bought the flappers the total I would have in it so far is $60

[Polo-1]

I think tips changed to all perforated after 2010?

The big thing is ZR1/Z06 are 3" and the GS and NPP are 2.5" pipe.

[1990 quasar blue]

I thought the difference in diameter was the inlet, not the tips?

[1990 quasar blue]

I have a solid idea to try, but it does not include the tips.. it is very close to the pictures posted earlier in the thread. if I bought the flappers the total I would have in it so far is $60

Do tell?

[Polo-1]

I thought the difference in diameter was the inlet, not the tips?

You may be right... I just looked at mine, 3" in and 2 2.5 outlets one with valve ( that you want). I'm not a 100% on the outlet size for the GS/NPP's. I would ask around the C6 forums and see if someone would take a tape to it, and make sure.