Pics of X-pipe install

[Nacho_ZR1]

So now that I've gotten a baseline dyno of my car and am pretty happy with the results, it's time to start Round 1 of my performance mods: Haibeck chip and x-pipe install. Took the car to a local muffler shop in Dallas. While the car was on the lift, I snapped some photos on my BlackBerry. I have a stock exhaust, by the way, with Dynomax mufflers.

Here's a view of my stock resonator:

http://i1139.photobucket.com/albums/n554/Nacho_ZR1/stock_resonator.jpg

You can really see the exhaust going from a 2 1/2 diameter to 2 1/4 as it feeds into the resonator. I had the guy cut the pipes right before the tapering so I could keep it at a nice 2 1/2 inches all the way through.

http://i1139.photobucket.com/albums/n554/Nacho_ZR1/restrictive_taper.jpg

After the resonator and pipes were cut, I took a pic of the opened up exhaust:

http://i1139.photobucket.com/albums/n554/Nacho_ZR1/pipes.jpg

One of the things that I found very surprising was the fact that the Resonator is actually a straight-thru design. This made me wonder how much of a performance gain I would actually see? Hmmmm:

http://i1139.photobucket.com/albums/n554/Nacho_ZR1/resonator_seethru.jpg

Here goes a pic of the final product right before the final welds were completed:

http://i1139.photobucket.com/albums/n554/Nacho_ZR1/xpipe_installed.jpg

Overall, I am happy with the results. There is a little more of a drone between 1000-1800 rpm but other than that, I really don't notice anything else. The seat of the pants feel was the same. I am supposing that once the headers get installed, this will compliment the performance.

Also, here is a youtube video of me revving up the car after the x-pipe install. There is a raspier sound which reminds me alot of the Corsa.

Oh, and also, the PO had the dynomax mufflers installed and left the stock ZR-1 tips. I LOVE the sleeper look :) !

http://www.youtube.com/watch?v=_ri5LGvy1VE


Thanks for reading!

[1990 415]

Sounds good. You should get the muffler tips centered better for a cleaner look. Have fun.

[todesengel]

love it! :cheers:

[pantera1683]

Nacho,

Sounds good, now get yourself a license plate holder.:-D

[Nacho_ZR1]

Nacho,

Sounds good, now get yourself a license plate holder.:-D

OMG I am DYING for a license plate holder!!!!!! My plate looks so wimpy and sad on there, I totally agree :( If you know of where I can find one, hell even a look-alike will do, it would be MUCH appreciated! Merry Christmas, by the way
:salute:

[Aurora40]

Did the ZR-1 exhaust change for 1992? My resonator necked down to under 2". Also your car has rectangle tips, not the dual-squares of '90-91, and I thought, '92.

Can any '92 owners confirm which ones the car came with from the factory?

[XfireZ51]

OMG I am DYING for a license plate holder!!!!!! My plate looks so wimpy and sad on there, I totally agree :( If you know of where I can find one, hell even a look-alike will do, it would be MUCH appreciated! Merry Christmas, by the way
:salute:

I have one but believe it's spoken for. Kurt White has a filler plate on eBay.

[sammy]

92s did go to the single outlet . only 90 91s had the 4 outlets .90 mufflers were oval and 91s were round

[Hammer]

Did the ZR-1 exhaust change for 1992? My resonator necked down to under 2". Also your car has rectangle tips, not the dual-squares of '90-91, and I thought, '92.

Can any '92 owners confirm which ones the car came with from the factory?

I don't have a '92, but the exhaust tips on Nacho's car are from a '93 up.

[FU]

The 93 and up stock tips look best out of any other (IMO).
Does anyone have a link for Hib's exhaust ? Be darned can't find it.

[sammy]

go to corvette action center its there . sorry i dont know how to do the link thingy

[sammy]

its also on the registry home pg . hit articles then when the next screen comes up hit the article button on the left side of the pg . scroll down to 28 quiet hp

[Hammer]

Corvette Action Center
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

[FU]

Here ya go for all us computer impaired and old folks ;)
Thanks Brad :cheers:

http://www.zr1netregistry.com/flowmaster.htm

[FU]

Wasn't there an article about the restrictions of the ZR1 OEM exhaust , had something about changing over the resonator over to a LT1 unit etc. ?

[sammy]

yes , specificly it was the lt4 resonator that didnt neck down . it was 23/4 all the way through . plus i am wondering about the rear balance pipe that was in this system and if i might control some of the resonance with an xpipe . the rear one was just after the pipe got past the rear end . i hate to say this but trying to find the perfect exhaust , that is reasonably quiet has caused me to now have in the rafters a corsa, flowmaster, corsa , a 90 stkand a 91 stk. currently on the car is the dr gas setup(90) and my do it yourself 23/4 system with what they call a ladder type crossover . heck i could start a vet muffler shop .arguhhhhhhhhh

[Nacho_ZR1]

I have one but believe it's spoken for. Kurt White has a filler plate on eBay.

Well if the buyer backs out, I can PayPal you $ immediately. Do you also happen to have a link for the filler plate on eBay? I did a quick search but didn't come up with anything....

[Nacho_ZR1]

Thanks for all of the helpful links regarding the ZR1 exhaust systems! It'll definitely make for some nice reading on this cold and dreary Xmas day!

:wave:

[XfireZ51]

Well if the buyer backs out, I can PayPal you $ immediately. Do you also happen to have a link for the filler plate on eBay? I did a quick search but didn't come up with anything....

http://www.whiteracingproducts.com/index.php?main_page=popup_image&pID=340&zenid=ab4c044484b14dc05b931e7df8651e96

I'll keep you posted on buyer.

[Hog]

Well if the buyer backs out, I can PayPal you $ immediately. Do you also happen to have a link for the filler plate on eBay? I did a quick search but didn't come up with anything....
Kurt White has 15 of them available, he wants $138.55 a piece.
Gm list was $53 way back in 1992.
p/n 16509671
http://www.whiteracingproducts.com/index.php?main_page=product_info&cPath=5_194&products_id=340

peace
Hog