nMeOnE

I just recently installed the flex fuel sensor into my AEM EMS V2 and was wondering if anyone has any tuning strategies for the SOS supercharger application? I know most of the turbo guys on here use a similar tuning strategy, but with the supercharger having a constant boost and no way to control it on the fly it would be a little difficult to use the same strategy as them.

My current mod:

Walbro 485
ID 1000cc injectors
AEM EMS V2
GM flex fuel sensor wired to pin D12 (switch 3)
Stock motor
SOS supercharger pushing 15-16 psi

My current tune right now is for 93 octane.

I'm going to copy the map over to the flex fuel and add 30% more fuel as a base line for E85.

What would you guys recommend?

braeden

You might need bigger injectors for E85. I am having my 3.2" SOS Stage II retuned for a flex fuel setup at the moment and I'm maxing out my ID1000s on 93 @ 17psi or so.

That is of course at stock fuel pressure, your pump should be more than capable of delivering enough pressure for at least a 93 setup, E85 might be on the borderline unless you want to get ridiculous with the fuel regulator

nMeOnE

I have a AEM FPR set for 45 PSI.

My car is a 08 with a SOS return fuel system as well.

I have looked in the forums and some of the guys are making 500 rwhp on E85 with Flex Fuel on 1000cc injectors and base pressure.


On my 100 octane tune i'm making 430 RWHP at 78% at redline. 16 psi @ 45 PSI fuel pressure

I'm also on a NOVI 1200 if that makes a difference.

CoolGuy094

I made around 430 whp on E80 at 16 PSI with ID1000's set to 50 PSI fuel base pressure (running a Walbro 255). I was like 90% injector duty I think. This was on a Novi 1220.

nMeOnE

update: I definitely ran out of injector past 7500 RPM.

at 12 PSI and 7500 rpm i was seeing 90% duty cycle and right around 8000 rpm and 13 psi, I am seeing 100% duty cycle at base pressure of 43.0

I am planning on upping the pressure to 55-60 psi rather then get 1300cc injectors.

The car will not need the fuel unless its going past 8000 rpm so upping the base pressure will be the most cost effective and easiest method right now.

honda85

If im running ID1700 injector with single walbro 450, 8an feed, 6an return. So is that the standard setting 50 psi as base pressure?

AP1Chief

You can make 500 on E85 and 1000s with a return and 55 base on 1:1, I've done It many of times.

confused what the OP is asking though? All you can really do to improve power on same boost is add some timing into the tables, don't get to carried away though if you do not know what you're doing.