Apexi SAFC2 Turbo Tune
12-29-2011, 10:21 AM
#4
Junior Member
Thread Starter
Join Date: Dec 2011
Posts: 11
the SAFC2 has a setting called "dec. air" (decelerating air)
i know you have to use this in order to run a atmospheric BOV without stalling inbetween gears
the setting lets you choose the throttle % that you want "dec air" to take over at, and when below that throttle level, you can actually set what your MAF sensor is telling the ECU.
this keeps you from having too much gas on the motor when you let out of the throttle because the atmospheric pressure goes back to zero instantly.
anyone have any suggestions on what to set my hi/lo throttle, throttle point, and dec air at ?
i know you have to use this in order to run a atmospheric BOV without stalling inbetween gears
the setting lets you choose the throttle % that you want "dec air" to take over at, and when below that throttle level, you can actually set what your MAF sensor is telling the ECU.
this keeps you from having too much gas on the motor when you let out of the throttle because the atmospheric pressure goes back to zero instantly.
anyone have any suggestions on what to set my hi/lo throttle, throttle point, and dec air at ?
12-29-2011, 03:43 PM
#5
If you disconnect the primary o2 sensor it will lock the ECU into open loop and is prob your best bet with the SAFC, thus allowing you to control fuel trims. You could also run e85, upgrade your injectors and fuel pump and prob get away with running more boost even though the SAFC does not adjust timing. Hope this helps
12-29-2011, 08:10 PM
#7
But if you have it and plan on using it.....
Another thing to point out is if you use e85....you really shouldnt have to make any changes in closed loop any ways considering the higher octane and the higher AFRS should be acceptable for e85 tuning.
12-29-2011, 11:01 PM
#9
On top of that, he wants to be around 8psi. To run that kida boost hea gonna have to have somewhat larger injectors. Theres no way possible to compensate for that amount of fuel with an safc. Ive used the vafc on my old civic and in all honesty it was more difficult to use than an fic. Imo, the safc would be more beneficial for an n/a build.
12-30-2011, 01:04 AM
#10
On top of that, he wants to be around 8psi. To run that kida boost hea gonna have to have somewhat larger injectors. Theres no way possible to compensate for that amount of fuel with an safc. Ive used the vafc on my old civic and in all honesty it was more difficult to use than an fic. Imo, the safc would be more beneficial for an n/a build.
GO BUY AN AEM FIC, sell the safc on craigslist or on supra/dsm forums they love safc
12-30-2011, 01:10 AM
#12
How is it possible to control closed loop tuning w the safc? It would have to rely mainly on the factory ecu. Theres no physical map that u can go into to compensate for the amount of fuel that needs to be trimmed out. For instance, im runnin 550's w a walboro 255 and im almost at -35% fuel @ idle. Is there some setting that u can compensate for this? Its been almost 8 yrs since ive used one but i dont recall any settings to compensate for fuel in that nature.
12-30-2011, 04:21 AM
#13
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Thread Starter
Join Date: Dec 2011
Posts: 11
well i got the SAFC2 for 40 bucks.. cant beat that.
and im not going over 4psi for now, MAYBE 5.
i know some people run 4-5psi with no tune.
im more worried about stalling inbetween gears, causing it to rich out..
eventually i will go with more boost when i get a more reliable way to tune
would it be safe to use the SAFC2 on low boost ?
and im not going over 4psi for now, MAYBE 5.
i know some people run 4-5psi with no tune.
im more worried about stalling inbetween gears, causing it to rich out..
eventually i will go with more boost when i get a more reliable way to tune
would it be safe to use the SAFC2 on low boost ?
12-30-2011, 10:03 AM
#14
It can be used for now but how long will you stay at 5psi? Start looking for an Fic or Emanage soon. Those people that run 5psi with no tune do so at their own risk.
Think logically about the consequences. Tunes make or break a car so not having one at all. Use your own judgement.
Think logically about the consequences. Tunes make or break a car so not having one at all. Use your own judgement.
12-30-2011, 02:47 PM
#16
what kind of bov are u running? i had an hks ssq that i was runnin w the factory ecu and i never had an issue with stalling out between shifts. i ran the blow thru maf and draw thru while running the bov atmospheric.
12-30-2011, 04:03 PM
#20
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Join Date: Jan 2008
Location: DFW, Texas
Posts: 411
if u plan on making any power you will have to get rid of the factory injectors or you will have a ticking time bomb lol.
i have seen people just install 550 and run that without a tune on like 6-8 psi the car will run but it will be a bit rich but are ecu are pretty smart and i will adjust accordingly and he is correct not having control of timing is no good.
btw i have a set of used dw550 i had on my car for few months for sale hmu if intrested.
i have seen people just install 550 and run that without a tune on like 6-8 psi the car will run but it will be a bit rich but are ecu are pretty smart and i will adjust accordingly and he is correct not having control of timing is no good.
btw i have a set of used dw550 i had on my car for few months for sale hmu if intrested.