I pretty sure its coming from the rear axle. When im coasting to a stop or crusing at low speeds i get a pretty noticable whine/humming coming from the rear. Is this normal? I have touched it back there set aside for a set of whiteline bushing to help the thud.
SlvSTI05
very true...i really didnt even need a tune (although it helped low end tremdously when i cobbed it) for my turboback system. Ported the wastegate and went on my way
RE: Re: RE: Re: RE: Re: Anyone else notice alot of gear whin
Im really confussed, I thought everyone said you will get extreme boost creep if you run a downpipe with no tune. I was under impression that a catted downpipe would be ok, but if you want offroad a tune is highly recommended. I guess since this is my own thread I can highjack it..hehe
Im really confussed, I thought everyone said you will get extreme boost creep if you run a downpipe with no tune. I was under impression that a catted downpipe would be ok, but if you want offroad a tune is highly recommended. I guess since this is my own thread I can highjack it..hehe
No, you do not need a tune with just a downpipe. However, let's be more specific here - we're talking about boost creep.SlvSTI05 said:
1) It depends on how cold it gets where you are
2) It depends on whether you get a catted or non-catted downpipe
3) It depends on the cat placement
4) It depends on whether you run the stock catback or not
5) It depends on YOUR VF39
Lots of depends eh? However, the general rule of thumb is that if you have a cat in the downpipe directly off of the turbo then you generally do not get boost creep with a full TBE. If you run the stock catback then along with that catted downpipe then you are most likely going to be good to go. TONS of people have run with a catted TBE and no engine management ... including lots of people here on this board.
A non-catted TBE gives MOST people boost creep and fuel cut. Some people haven't experienced it ... however, most just haven't wound out 5th on a really cold day (i.e. freezing outside).
I would have absolutely no reservations about installing a catted downpipe along with the stock catback. Is there a chance it will creep? Yes. It is likely? No. If you want a non-catted downpipe ... then you are starting to get risky. I would say it's a gamble ... but one worth taking if you are running the stock catback. Seems like this ends up being a 50/50 deal and depends highly on your VF39. However, that stock catback will provide enough back pressure to truly help prevent creeping.
t
well i already have an hks catback so I guess that rules out the stock catback combination. I guess In the long run I really would prefer running an offroad downpipe mainly because of the price of catted ones. However I dont want to cause any damage to the car from excessive creep. It can get fairly cold here in Ok, so that may be an issue. I guess my main concern is boost creep and the potential to hit fuel cut off all the time, that could get fairly annoying. I would like to do whatever it takes to run an offroad dp to save cost, and then see later have the option to just weld in a magnaflow 3 inch converter...or I may just do that from the start....still cheaper than a catted pipe new. What it all comes down to is me looking for power at a good cost. I just figured a downpipe would yeidl the most results, if anyone else has any more suggestions please let me know. Im really looking for some top end in my car, I just hate when Im racing LS1s and Im spanking thier asses untill I hit 5th gear and I get passed like im standing still. LOL, anyways thanks guys.
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