2871R or T28 Elim questions

[enalp]

Hi, i'm am new to the Audi scene and was more of a DSM guy previously.I am planning on going with a 2871R Elim or T28 kit in a few weeks. I was curious if it's safe to use an EBC to run around on 15PSI or so with the stock exhaust as I like my car to be quiet when i'm just cruising. I will get an electronic exhaust cut out for the track or hard driving and just raise the boost to like 23 PSI or so when its open. Is thestock exhaust safe for the turbo at the lower boost levels?
Also what kind of gains would I have to look foward to if I used the snow methanol kit on top of the upgraded turbos? Faster spool,more power and if so ho much?

[Avant1.8BT]

are you getting a tune for your car or just running an ebc?

[bob12312357]

are you getting a tune for your car or just running an ebc?

Ebs alone is dangerous with no tune.

[Seerlah]

I think he was referring to the amount of back pressure the stock exhaust will have with the kit. To the OP, I would upgrade the exhaust. There are plenty of quiet aftermarket exhaust systems. Milltek, APR, and Vibrant are good ones to look into. You could even bolt one designed for the B5 S4 onto the A4 chasis (just need to cut off and weld shut the extra 'y' peice) so you could have a 3" straight though and not need to worry about a cut out.

[biketsai]

I ran stock exhaust for a little bit, it was pretty restricting and very slow. Id recommend at least getting a high flow cat.

[A4Rob]

Running water/meth injection on a stock turbo will be like ordering extra sprinkles on your long john.

[enalp]

No, no no. I've replaced my K03s and the wheel is the size of not even a half dollar. The meth injection on the 2871R or T28. What kind of gains can I excpect on top of the turbo? 20,30 ponies?
Also I am really curious if the stock exhaust will damage the 2871R or T28 turbo. A lack of power for everyday driving is fine. The damage a 1200 dollar part is not.Anyone know.

[2001A4QUATTRO]

Extra exhaust backpressure will create heat. Like said already there are plenty of quiet exhausts... Its your turbo..

[B5A4Kevin]

i would say at a minimum, if not replacing the entire exhaust, either install a test pipe, or have your cat run away (free upgrade just time consuming), as the stock catalytic converter is a major restriction on the exhaust and is directly downstream of the turbocharger.

the factory downpipe is also a bottleneck point in the stock exhaust.

hope this helps. peace.

[AudiRacerS4]

No, no no. I've replaced my K03s and the wheel is the size of not even a half dollar. The meth injection on the 2871R or T28. What kind of gains can I excpect on top of the turbo? 20,30 ponies?
Also I am really curious if the stock exhaust will damage the 2871R or T28 turbo. A lack of power for everyday driving is fine. The damage a 1200 dollar part is not.Anyone know.

meth injection is not going to yield any real gains without a proper tune for it. You can't keep the stock exhaust with t28 or 2871r your egt's would be dangerously high.

[Jeff]

As a DSM guy myself, Audi's do NOT respond to boost tweeks like the DSM's do. What year is your car? The AEB (drive-by-cable) care are more tweekable for a homebrew, and you can get away without too much software. Drive-by-wire care are more sensitive, and if the ECU sees more boost than what the request is, the throttle plate would simply close on you and go into limp mode. bitterchild has a dbc, and ran a MBC with an AFC on a 28RS, and was putting down good power...you should talk to him if this is the way you want to go. Most people don't want to bother with the piggybacks and tweek, so they just buy software instead.

The 2871R Eliminator is choked, as it is inside a less efficient turbine, and has a 28R 2-bolt compressor housing. You will see better gains with a full 2871R with a T25 inlet. The 2871R is pretty comparable to a BIG TD05-16G in flow and spool. But seriously... if you are about making raw/cheap HP, I would stick w/ the DSM (when it doesn't break

Welcome to the Audi scene fellow DSM'er...and chk out my signature:

[Seerlah]

Wonder why the OP has not responded to his own post? But I will go on assumption that he was planning on getting a GT2871R Eliminator kit and a street tune for it. Then his inquiry was how safe would running 15 psi with an ebc be with the stock exhaust system? I don't know if he had any plans for an upgraded manifold. But the entire process seems as if he will be choking that turbo if he does not free up exhaust flow. My advice, though no expert, would be for him to get a high flow manifold with his kit, and a 3" exhaust coming from the 3" downpipe. That eliminates any troubles or worries of restriction and he could run as much boost as he feels safe on the stock block. Only real concern after that would be the rods shooting through the block running higher boost.

[Cecchini]

I don't mean to thread-jack but would a 2.5" exhaust choke up a 2871r elim? I would get a hfc, downpipe and exhaust mani but will there be that much of a difference between 2.5" and 3" exhaust from the cat-back?

[biketsai]

I don't mean to thread-jack but would a 2.5" exhaust choke up a 2871r elim? I would get a hfc, downpipe and exhaust mani but will there be that much of a difference between 2.5" and 3" exhaust from the cat-back?

I wouldnt say it would choke it up, I am running a 2.5" myself, however it will not flow as good as a 3"

[Jeff]

I don't mean to thread-jack but would a 2.5" exhaust choke up a 2871r elim? I would get a hfc, downpipe and exhaust mani but will there be that much of a difference between 2.5" and 3" exhaust from the cat-back?

2.5" exhaust is good for up to 500whp easily.... 3" will open it up a bit, but also add more noise. Leave it alone.