S4 turbos on a 2.8?
#1
03-30-2011 | 02:06 PM
Thread Starter
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1st Gear
Joined: Aug 2010
Posts: 157
S4 turbos on a 2.8?
I was looking at some guy's S4 at autozone yesterday, and he mentioned that the engine was a 2.7 biturbo. I thought beforehand that the S4 had the same engine as the A4. So that led me to think, couldn't I get a pair of OEM turbos and install them and essentially have an S4? I know that the S4 has different suspension and a different tranny, but the important part of the S4 is the engine. So, is it worth it?
#5
03-30-2011 | 02:48 PM
There's a lot more to it than turbos, suspension, and transmission. The 2.7 is a 2.7 because the cylinders have been sleeved to handle the extra HP produced by the turbos. The exhaust manifolds are obviously different because of the turbos, so you'd have to swap those out as well. Then you'd need to find some way to lubricate the turbos, so you'd have to fab up some oil lines. turbos need intercoolers, so you'd need a pair of SMIC's or a big FMIC. turbos push more air so you'd need more fuel, that means a set of bigger injectors and/or a different FPR. If you could manage to source all of that for anywhere close to what you paid for your car in the first place, you'd still need a tune to control the boost, plus all the necessary sensors and wiring. It would be far cheaper and less effort to just buy an S4 and be done with it.
#6
03-30-2011 | 03:35 PM
Thread Starter
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1st Gear
Joined: Aug 2010
Posts: 157
There's a lot more to it than turbos, suspension, and transmission. The 2.7 is a 2.7 because the cylinders have been sleeved to handle the extra HP produced by the turbos. The exhaust manifolds are obviously different because of the turbos, so you'd have to swap those out as well. Then you'd need to find some way to lubricate the turbos, so you'd have to fab up some oil lines. turbos need intercoolers, so you'd need a pair of SMIC's or a big FMIC. turbos push more air so you'd need more fuel, that means a set of bigger injectors and/or a different FPR. If you could manage to source all of that for anywhere close to what you paid for your car in the first place, you'd still need a tune to control the boost, plus all the necessary sensors and wiring. It would be far cheaper and less effort to just buy an S4 and be done with it.
#9
03-31-2011 | 12:35 AM
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Joined: Feb 2007
Posts: 9,004
From: Nor Cal
There's a lot more to it than turbos, suspension, and transmission. The 2.7 is a 2.7 because the cylinders have been sleeved to handle the extra HP produced by the turbos. The exhaust manifolds are obviously different because of the turbos, so you'd have to swap those out as well. Then you'd need to find some way to lubricate the turbos, so you'd have to fab up some oil lines. turbos need intercoolers, so you'd need a pair of SMIC's or a big FMIC. turbos push more air so you'd need more fuel, that means a set of bigger injectors and/or a different FPR. If you could manage to source all of that for anywhere close to what you paid for your car in the first place, you'd still need a tune to control the boost, plus all the necessary sensors and wiring. It would be far cheaper and less effort to just buy an S4 and be done with it.
