OK my plan with my engine swap is the following:

86' n/a car

S5 engine
S4 turbo and manifold (stock)
S4 intake and sensors
S4 front cover (no OMP)
550cc primary injectors (stock)
720cc secondary injectors
medium size street port
exhaust porting
Stock S4 ECU
SAFC piggy back
FMIC
Racing Beat Rev 2 exhaust

My question is how far can I go with the stock ECU and my SAFC...

I plan to run as close to stock boost a spossible atleast for the break in and prolly the first season.... Iwill be on a n/a trans/diff so I wont be able to go to crazy

What do u guys think? will I have any problems should there be something I should look out for?

 

nobody has any input?

 

just be careful with the boost creep. port the wastegate if u can, i highly suggest u do, boost creep isnt too good espically if u dont tune for it.
550/720 is a good combo and should suit u well with stock turbo.
either than that and of course u forget to post ur walbro , everything else looks fine.
try to see if u can find a base map online with simimlar setup as urs, make the points alil reacher and take care to dyno and TUNE WITH A WIDEBAND.

also i would suggest instead of using "tps" like SAFC wants hook up to "MAP/Boost" sensor, is better for setting fuel on low and high map because of the narrowband nature of the s4 TPS.

 

yeah I need to get a Walbro 255 I plan to buy one hopefully this weekend...

when I get to switching out the ecu I will have to find out which wire is for the map/boost sensor so I can switch it over...

the good thing is my SAFC is allready hard wired into my harness so if I only have to change 1 wire and plug in the new ecu that will be easy enough..

THX for the update Alex...