...more "exhausting" questions. - ZR-1 Net Registry Forums

Meanmyz · 01-31-2014

My car is currently at Marc's getting his 350/510 package.

After doing much thinking on the subject of exhaust, during the time frame of our first SW group buy, I decided on:

- SW headers (factory connection) with cats.

- Corsa exhaust

One thing I have learned since then, and please correct me if I am wrong, is that:

- Having headers with the factory connection point means that they NO LONGER are considered "long tube headers" as talked about on Marc's site for power upgrades.

Is this true?

Also, in reading some comments in another exhaust thread about headers without cats being VERY loud..."annoying and attracting unwanted loud attention", I am now wondering...

1. Will my SW headers with factory connection points, attached to high flow cats and Corsa exhaust, be "annoying and attracting unwanted loud attention"?

2. For the fact that my headers have factory connection points, (which makes them "shorty headers"?) will they have an adverse effect on torque band and horsepower?

(I understand that cats will slightly drop HP but might help with less tinny sound)

For "those in the know", I appreciate your input. Thanks!

We Gone · 01-31-2014

I can only comment on adding cats, I also have Marc's 510 package. I have SW long tube headers. I went from Flomasters with high flow cats to Corsa without cats.
It sounded great at WOT but I did not like the hollow tinny sound at low RPM's. Before I went back the Flowmasters I added the high flow cats back to it. Sounds much better lost most of the tinny sound and has a deeper sound.

edram454 · 01-31-2014

get rid of the cats if you can. power robbers. get a resonator to get rid of the drone. try to use the long tube headers as "long tube" headers should be used, dont cut them. by cutting them you will lose some of the benefits of scavenging heat and the cats just suck up power. On my c5, the cats insides were blown out the exhaust pipes during dyno tuning. As soon as the guts blew out I picked up 25 horse.

ed ramos #3028.

Schrade · 01-31-2014

You adding the pipes there Meany? Or is Marc?

If you're doing it, post snappics if you would... I'm gonna' add OBX's pretty soon here.

Anybody else got shots of pipe-work install? Tips?

(not tryin' to boost your thread here Meany)

Meanmyz · 02-01-2014

Quote:

Originally Posted by Schrade

You adding the pipes there Meany? Or is Marc?

Sorry Schrade. I gave Marc everything so that once installed, I could get the best "tune".

We Gone · 02-01-2014

Long Tube with cats, I had Marc redo this setup back to a slip fit on collectors and a longer cat as these were about 6 years old and I still have to pass emissions in Ga. for a few more years.

Meanmyz · 02-01-2014

Quote:

Originally Posted by We Gone

Long Tube with cats, I had Marc redo this setup back to a slip fit on collectors and a longer cat as these were about 6 years old and I still have to pass emissions in Ga. for a few more years.

Thanks Steve. Those are definitely an example of "long tube" headers.

ZR1North · 02-02-2014

Very timely post (We Gone); that's just the set up I am looking for.

Meanmyz · 02-01-2014

I'll add some thoughts on "why cats".

My point in this excercise of going to 500HP (other than it being fun

) is that when GM produced this car, they left a whole lot of "potential" on the table, and walked away (but not without having learned some things).

I have been a ZR-1 fan since its inception. The way it was introduced and the impression it had on me was it being the "be all, end all" Corvette.

So, without changing displacement ($$$$), I am going at it like "what if GM had done more"? What if other than the enthusiastic engineers, that the bean counters and higher management at GM too, would have all been on board, at making a truly, most badass statement (even more than so), and had taken the car closer to it's horsepower potential?

That is my dream of what I want my car to be. In all it's high tech, highly sofisticated (for the time) glory, cats and all, taking the car closer to the "nth degree" as an example of what it could have been.

Ok, I'll get off the soap box now. If I was a big drag racer, I would probably be looking for every edge (take off the cats, or ANY restrictions I could find) in my efforts or goals to go faster. Any car can usually be made faster (especially if you dump all of the emissions crap), but that is not what I wanted this car to be.

mike100 · 02-01-2014

SW does sell adapters to hook up to stock cat-back/ factory connections that you can use on long tubes (not running cats). shown in link below- theoretically no welding -maybe on the passenger side, but I can attest that the ball flange on the driver's side works like a champ mating to the stock pipe set or on a Corsa.

http://www.stainlessworks.net/catalo...16/image/1294/

You can run cats on long tube headers if you really want to bad enough:
more recycled Z06 parts- LS7 catalysts using what was left of my SW adapter tubes (slip on collector fit).

01-31-2014	#1
Meanmyz Join Date: Feb 2006 Location: Springfield, Minnesota Posts: 446	...more "exhausting" questions. My car is currently at Marc's getting his 350/510 package. After doing much thinking on the subject of exhaust, during the time frame of our first SW group buy, I decided on: - SW headers (factory connection) with cats. - Corsa exhaust One thing I have learned since then, and please correct me if I am wrong, is that: - Having headers with the factory connection point means that they NO LONGER are considered "long tube headers" as talked about on Marc's site for power upgrades. Is this true? Also, in reading some comments in another exhaust thread about headers without cats being VERY loud..."annoying and attracting unwanted loud attention", I am now wondering... 1. Will my SW headers with factory connection points, attached to high flow cats and Corsa exhaust, be "annoying and attracting unwanted loud attention"? 2. For the fact that my headers have factory connection points, (which makes them "shorty headers"?) will they have an adverse effect on torque band and horsepower? (I understand that cats will slightly drop HP but might help with less tinny sound) For "those in the know", I appreciate your input. Thanks! Last edited by Meanmyz; 01-31-2014 at 07:59 PM.

01-31-2014	#2
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,170	Re: ...more "exhausting" questions. I can only comment on adding cats, I also have Marc's 510 package. I have SW long tube headers. I went from Flomasters with high flow cats to Corsa without cats. It sounded great at WOT but I did not like the hollow tinny sound at low RPM's. Before I went back the Flowmasters I added the high flow cats back to it. Sounds much better lost most of the tinny sound and has a deeper sound. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

01-31-2014	#4
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: ...more "exhausting" questions. You adding the pipes there Meany? Or is Marc? If you're doing it, post snappics if you would... I'm gonna' add OBX's pretty soon here. Anybody else got shots of pipe-work install? Tips? (not tryin' to boost your thread here Meany) __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

02-01-2014	#6
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,170	Re: ...more "exhausting" questions. Long Tube with cats, I had Marc redo this setup back to a slip fit on collectors and a longer cat as these were about 6 years old and I still have to pass emissions in Ga. for a few more years. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

02-02-2014	#8
ZR1North Join Date: Feb 2007 Location: Komoka, Ontario, Canada Posts: 588	Re: ...more "exhausting" questions. Very timely post (We Gone); that's just the set up I am looking for.

01-31-2014	#3
edram454 Join Date: Nov 2013 Location: .. Posts: 693	Re: ...more "exhausting" questions. get rid of the cats if you can. power robbers. get a resonator to get rid of the drone. try to use the long tube headers as "long tube" headers should be used, dont cut them. by cutting them you will lose some of the benefits of scavenging heat and the cats just suck up power. On my c5, the cats insides were blown out the exhaust pipes during dyno tuning. As soon as the guts blew out I picked up 25 horse. ed ramos #3028.

02-01-2014	#10
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: ...more "exhausting" questions. SW does sell adapters to hook up to stock cat-back/ factory connections that you can use on long tubes (not running cats). shown in link below- theoretically no welding -maybe on the passenger side, but I can attest that the ball flange on the driver's side works like a champ mating to the stock pipe set or on a Corsa. http://www.stainlessworks.net/catalo...16/image/1294/ You can run cats on long tube headers if you really want to bad enough: more recycled Z06 parts- LS7 catalysts using what was left of my SW adapter tubes (slip on collector fit).