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Still running my 2.25" 7A exhaust and am about to go for a 2.75" system for my homefried 3B (no Cat). Will I notice a differemce (what extra will it release) apart from the noise. In other words is it worth the money.
Getting 2.75" now as intend in aiming for 350bhp with roller bearing turbo next year.
1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
2004 A4 2.5TDi convertible, re-mapped to 180bhp
2011 A5 sportback 3TDi-Backbox delete, remap
Still running my 2.25" 7A exhaust and am about to go for a 2.75" system for my homefried 3B (no Cat). Will I notice a differemce (what extra will it release) apart from the noise. In other words is it worth the money.
Getting 2.75" now as intend in aiming for 350bhp with roller bearing turbo next year.
yep u will i decated a standard system and gained 13 bhp
No Cat on present system but it was the one I had fitted to the 7A engine and where it bends the diameter drops to 2" so hope to feel a difference when the 2.75" with mandrel bends gets fitted in a few weeks time.
1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
2004 A4 2.5TDi convertible, re-mapped to 180bhp
2011 A5 sportback 3TDi-Backbox delete, remap
I'd have thought so, i'd also have thought the 2.25 7a exhaust might be slightly restrictive as standard afaik is 2.5
depends how well its made as some have been that restrictive that it causes more harm than good (darrenm's exhaust springs to mind)
Have taken several in gear times with this exhaust and will compare with new one. Will put results up on here. So long as it shows an improvement it would have been worth it.
1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
2004 A4 2.5TDi convertible, re-mapped to 180bhp
2011 A5 sportback 3TDi-Backbox delete, remap
sounds like your facing the same question i am!! i have a 7a running a decat 2.5" atm and wondering if a 3" is necesary for a future 350bhp with my new 3b.
anybody know what the stock RS2 diameter is???
Ant
91' Coupe quattro 20v - project KW V2s and other goodies
now gone 03' BMW 330CI - Sold 08' A5 Coupe 3.0l tdi quattro - Sold 57' BMW 525d M Sport Touring
sounds like your facing the same question i am!! i have a 7a running a decat 2.5" atm and wondering if a 3" is necesary for a future 350bhp with my new 3b.
anybody know what the stock RS2 diameter is???
Ant
Ian Birch of pipewerx said that 350bhp is the limit after carrying out extensive testing. After that a 3" should be used although just fitting a 3" downpipe can make a big difference if the car is not going to be used for track days once past 300bhp. Will be interested to see results....
1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
2004 A4 2.5TDi convertible, re-mapped to 180bhp
2011 A5 sportback 3TDi-Backbox delete, remap
Ian Birch of pipewerx said that 350bhp is the limit after carrying out extensive testing. After that a 3" should be used although just fitting a 3" downpipe can make a big difference if the car is not going to be used for track days once past 300bhp. Will be interested to see results....
just spoken to charlie at prospeerd and given similar conclusion, he knows i trac my car a lot and as i have a target of 350 he recons a 3" is something i will need, although i'm sure some exageration took place since he is selling the exhaust
he does a 3" downpipe he will sell me for £220 to fit my 2.5" or for £550 he can do a full 3" turbo back.
these are just prices for me though as i have had a full exhaust from him already. just asking around if anybody wants my 2.5" atm as i dont have 550
Ant
91' Coupe quattro 20v - project KW V2s and other goodies
now gone 03' BMW 330CI - Sold 08' A5 Coupe 3.0l tdi quattro - Sold 57' BMW 525d M Sport Touring
just spoken to charlie at prospeerd and given similar conclusion, he knows i trac my car a lot and as i have a target of 350 he recons a 3" is something i will need, although i'm sure some exageration took place since he is selling the exhaust
he does a 3" downpipe he will sell me for £220 to fit my 2.5" or for £550 he can do a full 3" turbo back.
these are just prices for me though as i have had a full exhaust from him already. just asking around if anybody wants my 2.5" atm as i dont have 550
Ant
I'll take you 3" for £220 if you want....:mischeif:
it does seem there are quite a few of us Coupe and avant owners trying to get DP's sorted.....is it worth all getting together..getting a 'shoew of hands' and trying for the group buy type of thing??.....
We've tried before but its not come together yet - and I havent had time to pursue some specialists that haven't shown any interest. Needs someone local to go face to face them and talk numbers before they believe it.
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