[s-cars] RS2 Upgrade Questions

[Sean Douglas]

Tom:

Good questions, responses inline;

Sean Douglas
1997 S6 with RS2 stuff

> My questions,
> 
>  
> 
> 1.     Do I have to run a RS2 exhaust manifold? I have no 
> real issue buying
> one, they are just hard to find and cost big bucks.
> 

Not required, but recommended. List wisdom says that the stock manifold
does not remove excess heat from all cylinders and head overheating can
occur.


> 
> 2.     What turbo should I run? Again, RS2 are somewhat hard 
> to come by and
> many folks on the list reported good luck with other modified turbos.

The RS2 is a good compromise, still decent torque down low and good
power at the top end. Hybrids and others such as Garrett have less
bottom end, but super strong top end. I you are looking to track your
car on a regular basis, then go with a hybrid. If you are street
driving, then RS2 is best choice.

> 
>  
> 
> 3.     What changes should be done to the head besides 
> rebuilding? A new
> exhaust camshaft?

Since you have the head off, and if you have the $$$, then a RS2 exhaust
cam will restore some of the lost bottom end.

> 
>  
> 
> 4.     Do I need to change the injectors? Are the RS2 
> injectors the best? I
> know there are a number of companies that offer a range of 
> different flow rate Bosch style injectors.


Depends on the software. Off the shelf SW, only works with the RS2
injectors. If you go with custom programming, then you can use the 37
lb/hr injectors made by Delphi/Lucas.

> 
>  
> 
> 5.     What programming changes are recommended? Can I stay 
> with the MTM?
> Should I to go with something tuned for the new turbo, 
> whatever that may be?

The MTM SW will work, but is not optimized for the new turbo and
injectors and you will leaving some HP on the table. Again, depends on
what hardware you choose.