Help With My Build
11-05-10, 06:39 PM
#1
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Thread Starter
Help With My Build
I am building an s4 tii for next drift season. I need some recommendations and questions answered with my setup. I am still a high school student, and do not have money for luxuries that other people do. My chassis is squared away with ksport kontrol coilovers so we will stick to the motor.
First of all my tii engine needs to be rebuilt, so I am planning to street port it while I am in the process. Beyond the rebuild here is the list of things I plan on buying. I have not bought any of these things and am open to change.
Rebuild kit with street port and fd3s corner seals
ACT 4 Puck Clutch
Fuel Injectors 720 prim 720 sec
Parallel fuel rail setup with FPR
walbro 255lph fuel pump
cone style air intake (came with car)
Down Pipe
Electric Radiator Fan
Fuel Cut
Rev Limiter / Ignition Control
Intercooler ( i plan on running two top mounts as front mounts)(maybe)
Booost Guage
Greddy BOV
Koyo Radiator
Oil Pressure Regulator
My questions with this build is, will this be too much for the stock turbo charger.
Will I be dumping to much fuel? Do I need a Boost controller, and a fuel computer?
Does a projected horsepower of around 275 280 sound correct?
First of all my tii engine needs to be rebuilt, so I am planning to street port it while I am in the process. Beyond the rebuild here is the list of things I plan on buying. I have not bought any of these things and am open to change.
Rebuild kit with street port and fd3s corner seals
ACT 4 Puck Clutch
Fuel Injectors 720 prim 720 sec
Parallel fuel rail setup with FPR
walbro 255lph fuel pump
cone style air intake (came with car)
Down Pipe
Electric Radiator Fan
Fuel Cut
Rev Limiter / Ignition Control
Intercooler ( i plan on running two top mounts as front mounts)(maybe)
Booost Guage
Greddy BOV
Koyo Radiator
Oil Pressure Regulator
My questions with this build is, will this be too much for the stock turbo charger.
Will I be dumping to much fuel? Do I need a Boost controller, and a fuel computer?
Does a projected horsepower of around 275 280 sound correct?
11-05-10, 11:07 PM
#2
It's more injector than you need with a stock turbo, but it's not bad to add headroom if you can control it. Which brings me to this question: what do you plan on using to control those injectors? Standalone? Rtek? SAFC? If it's just a stock ECU, you'll have trouble even getting the car to start, let alone run well. Around 250whp is a more reasonable estimate of the most you can get out of a stock turbo. It depends on how much boost it's able to hold up top, since that's where peak HP is calculated. Take a look in the dyno section. Peak HP tends to be made at only 6-8 psi most of the time.
11-08-10, 11:05 PM
#3
One main thing missing from the list is a ecu
If you are struggling on cash, you can always get a rtek 1.8, it supports 4x 720cc injectors, but it doesnt have any fuel control, you would have to use a safc to do that. but for the price of a rtek 1.8 and a safc, you might as well get a rtek 2.1 which has full fuel and timing control, the rtek 1.8 will pull timing 1 degree for every 1 psi above 9.
With the stock turbo, the boost will drop off around 5-6k rpm. The compressor side is just not big enough to hold boost to redline, but it builds up boost very quickly at low rpm.
10-12 psi is pretty much the safe spot on the stock turbo.
If you are struggling on cash, you can always get a rtek 1.8, it supports 4x 720cc injectors, but it doesnt have any fuel control, you would have to use a safc to do that. but for the price of a rtek 1.8 and a safc, you might as well get a rtek 2.1 which has full fuel and timing control, the rtek 1.8 will pull timing 1 degree for every 1 psi above 9.
With the stock turbo, the boost will drop off around 5-6k rpm. The compressor side is just not big enough to hold boost to redline, but it builds up boost very quickly at low rpm.
10-12 psi is pretty much the safe spot on the stock turbo.
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