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View Full Version : How much whp will I be making???


Kilo_SME
10-21-2010, 10:50 PM
Just wondering how much whp a ATX fwd tt will I be making. Pretty much a stock conversion, except for the downpipe.Think I might run about 6 to 7 psi on a n/a ecu(with safc1). Any Ideas, dyno numbers? I really would like to know where I will be. Also, a na intake plenum.

Thanks
R/T93
10-21-2010, 11:21 PM
Stock DOHC autos put down 160-170, a BPU 10:1 TT running wastegate boost I am guessing maybe 230-240?
Kilo_SME
10-27-2010, 10:59 PM
Really? So how much boost will I need to get to 300whp. Thats all I want/need?
a2j
10-27-2010, 11:18 PM
I'd say 15psi on e85 :)
Kilo_SME
10-28-2010, 12:21 AM
I'd say 15psi on e85 :)

WTF!!!! Are you Foreal? There is no way!!! Ive seen plenty of people do it on no more that 10psi.(well at least I think)
lawdogg
10-28-2010, 01:20 AM
Figure out what you need to do after you dyno the car.
a2j
10-28-2010, 08:30 PM
WTF!!!! Are you Foreal? There is no way!!! Ive seen plenty of people do it on no more that 10psi.(well at least I think)

well if 15psi on 8:1 will give you about 260-280awhp so... ok maybe you could do it with 12-13 psi
deathsled
10-28-2010, 09:48 PM
My 10:1 vr4 with 13Gs makes 307awhp at 10psi on stock ECU and injectors with no tuning, and that's AWD obviously. I would think the fwd ATX could hit around that level. However, I have many more additional mods such as upgraded intercoolers, intake, full exhaust with no cats, and cam gears which all increase airflow through my engine, so 10psi for me is not like 10psi on a mostly stock setup.
Kilo_SME
10-29-2010, 12:21 AM
Yea I have gutted pre cats, im going to get a nice downpipe,no main cat, safc 1, 360cc injectors, on a na ecu. Once I at least get the car running I will think of bigger mods, but I was sure I could hit 300whp, with my car being 10:1 and fwd, with just these. Whats the highest I could run without knock?
Hammer
10-29-2010, 04:00 AM
Depends on your tune and fuel. 10:1 compression is pretty high. You will probably hit knock at 9 psi. If you can keep the air/fuel charge cool you can get a few more psi out of it. Run the highest octane you can get. E85 will do great you could run with closed waste gates on that stuff. Good luck.
deathsled
10-29-2010, 07:42 AM
the NA ecu is going to be the major limiting factor here when it comes to boost, especially running an SAFC with 360 injectors. Timing is going to be THROUGH THE ROOF since you will be scaling back the airflow signal around 30% just to wrangle in those 360cc injectors. Do yourself a favor and ditch the SAFC for an actual TT ecu.
Kilo_SME
10-29-2010, 09:04 AM
the NA ecu is going to be the major limiting factor here when it comes to boost, especially running an SAFC with 360 injectors. Timing is going to be THROUGH THE ROOF since you will be scaling back the airflow signal around 30% just to wrangle in those 360cc injectors. Do yourself a favor and ditch the SAFC for an actual TT ecu.
Wow! I was thinking i would have to scale it up. As for the tt ecu, its not really in the budget at the moment,but I will be getting one. I guess I'm going to have to hold off on getting 300whp and just get it running rite first. About the timing? So the na ecu is going to try to retard the timing? I have no idea how timing and the ecu work. Also should I just keep the stock injectors in and just keep it a wastegate boost.