574

iTrader: (5)

Yeah I still have the downpipe... If I knew it was gonna sound like this I might as well went catless! And I wouldn't have spent all that money on the corsa! This sucks..

Staged07SS

iTrader: (25)

I had a catless setup w/o rasp while running my Corsa catback. What kind of gaskets are you using for the header to head, header to downpipe, and downpipe to catback connection?

Never waste the money on the ZZP gaskets that come with their downpipes. They are not GM quality gaskets, and do not seal well. Also, the Badmab header gaskets are junk as well.

Here's what to use....

A genuine GM manifold to head gasket, genuine GM 3-bolt downpipe to manifold gasket, and a Remflex 2-bolt flange gasket for the downpipe to catback. I can guarantee that will solve some of the rasp. Rasp can be generated from the smallest of exhaust leaks.

riceburner

iTrader: (66)

its the reason i'm still unsure how this will lt will sound. i have 2 videos total and you can only tell so much how they reallly sound. sorry for you though, glad i can't say i didn't warn ya

574

iTrader: (5)

Haha You did warn me... Header gasket is just the one that was on when when I took the stocker off header to downpipe was the stock gasket too. Cat back two bolt flange is the gAsket that came with the corsa sport. I used my stock gaskets because I bought my header and downpipe used.

riceburner

iTrader: (66)

yea... u dont wanna use those new ones every time

574

iTrader: (5)

Hahaha alright man so I'll get what staged suggested...

Staged07SS

iTrader: (25)

I tried many different gasket combos man.... What I have now always works.

If I didn't just use my spare Remflex gasket for my new downpipe install, I would have sent it to you.

Are you running the ZZP 3" Downpipe?

574

iTrader: (5)

Yes 3" catted downpipe. And my used gaskets were lookin a little sad... Lol I figured if they worked on stock they should work with my new stuff.

Staged07SS

iTrader: (25)

Not always the case, haha.

RooTBeeR

iTrader: (4)

...if it's the touring and you wanna get rid of it let me know




I've reused my head/mani gasket a few times no problem, same with what ever cheap 3" gasket i have to go from the DP the the cat back.

riceburner

iTrader: (66)

well just got the lt header today!! hopefully will install one night this week(not sure since its a pain in the ass to do) or this weekend. will actually do a few before/after videos so we can really declare this raspy/rasp free.

RooTBeeR

iTrader: (4)

K, hurry up and do it already.

riceburner

iTrader: (66)

OK i finally put it in last night! i know, a little late on this one.

my initial thoughts are this:

sounds quiet/stock at idle.

sounds good if you're cruising lightly, just a tad deeper and raspier than stock

mash the gas, its raspy. buuut not too bad, kind of a lsj raspy. i'm gonna try to take a few vids today

LS6Rally

iTrader: (14)

i have a 2.4 but ive noticed i have rasp until the cat warms up. im guessing ts the spun metal expanding that quiets it down.

i have a ZZP Mid-legth Header, Catted DP and GMPP Cat Back.

riceburner

iTrader: (66)

yea well see if it changes after a good few heating cycles... and yea rasp decreses as the car warms up just like stock so i expected that. like i said, vids tomorrow most likely. stay tuned, yall!

dufcobalt

what is your new setup? do you keep stock catback?

riceburner

iTrader: (66)

yea, zzp longtube to stock catback.

so yea it pretty much sounds like a baffler in the muffler gave out or something, very ricey. i'm pissed. still dont have vids yet, sorry haven't had the chance.

was someone saying something about replacing the resonator to reduce rasp?? i just can't live with it like this

Staged07SS

iTrader: (25)

The stock catback with a hi flow header/downpipe will sound raspy....

A better resonator & muffler combo will help out.

riceburner

iTrader: (66)

yea... what did we decide it was, a 22" resonator that the stock system has? i'm gonna look back in this thread instead of being lazy but i forget if we has a solution to this...

also i think i'm hearing a bit of a leak now, probably time to retourque all the bolts make sure thats not the problem.

Staged07SS

iTrader: (25)

Good idea man.

riceburner

iTrader: (66)

yeah... lol i'll do that first before we start jumping to conclusions.

also, i realized my muffler is clamped on to the rest of my catback, not welded (i had a shop install it) so that's probably not helping out either. so i'm gonna go get that welded too.

THEN, (THEN!!!!) Vids and hopefully le no rasp

riceburner

iTrader: (66)

update! tightened all the bolts i could, got the muffler welded on. found out one of my header bolts wasn't even tightened yet. now, it is MUUCH less raspy, as someone said earlier small leaks can create lots of rasp. now this thing sounds much more like stock, just a good bit louder and more tone. there is still just a bit of leak somewhere i gotta find. once i do and dont hear the leak anymore i'll assume thats as good as its gonna get and take vids then.

Tjolley

im running a zzp longtube header catless dp and a zzp 3" catback...sounds sick was able to add some timing to my tune...it is very loud though..and it gets stupid loud wen u get on it. im also running a ported m62 with a 2.8. 60# injectors on e85 with a small shot of nos.

riceburner

iTrader: (66)

well long behold the video will STILL have to wait now. i went last night to replace my vband clamp (header/dp clamp) because when i first installed it the bolt broke and i barely had the nut on. now, this morning, i pull out of my neighborhood late for work and the new one just SNAPS on me.. FML its loud as hell running open header!

RooTBeeR

iTrader: (4)

But it sounds good! Lol