Okay, my best time is 13.43 @102.41 with these mods:

Stock S4 block
Stock S5 turbo/manifold
Centerforce II clutch
3" intake
3" turbo back exhaust
720cc secondaries
safc
ebc


I popped my motor, and will be rebuilding and putting the RA seals in within the next couple of weeks. While I've got it apart, I'm going to put a mild+ streetport on it. My walbro 255 is in the mail. (I know, I should have done this 1st)

My question is, with adding a streetport and a walbro, will I be able to knock another half second off to get into the 12's while still running the stock S5 turbo? Or, will I need to go ahead and go with a BNR stage 2-3?

Let me know what you guys think. I'd appreciate it.

 

I tapped 13.1 on a stock S5 turbo on a stock S4 block so I would assume its *possible*, but why would you even try? Pushing that S5 turbo that hard is just bad for your motor.

 

Okay, so let's say I go with a stage 3 BNR. Will an safc, and 720cc secondaries be an adequate amount of fuel at 12-14 psi? Probably not eh. I'm attempting to not have to go to a stand-alone ecu, but still (safely) get into the 12's.

 

You don't mention boost level, but I have this funny feeling you're running some serious boost?


-Ted

 

Too much boost.....and a stock fuel pump, hence why I'm rebuilding my motor. I'll be porting my wastegate before I put my turbo back on my rebuilt motor to try and keep the insane creep down. I, for the most part, could keep it under 15lbs.....but would creep over that if I was in the wrong gear under full throttle.

 

my stock s4 turbo never went higher than 11 psi, then again, the turbo was shot...

i ran 14.4s at 100 mph with terrible 60 ft times (like 2.5s) then again the streetported motor helped. Fd fuel pump and increased fuel pressure. no fuel controller. stock injectors woo. still ran rich as all hell up until the very high end. ie car needed some serious tuning.

hope to see a faster time with my new setup. (t70...)