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Boost + Cold temp's = flat spot - SAFC question

Robo

By Robo,
in Engines & Forced Induction

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Robo Community Regular

Robo

Posted
Posted

Hi Everyone,

I know eveyone has talked about this topic a few times now... but:

I understand how an SAFC alters the Air/Fuel ratios and all that...

Typical senario in that I went for a drive last night running 11 psi boost (was like 12 degrees out side) and that F$%KING flat spot came back again... (mods = boost, exhaust, I/C usual stuff).

If I'm correct the reason behind the flat spot between 4500 - 6000rpm is due to the AFM reading higher than usual volt's (due to denser air) and telling the ECU to retard the timing... (also you really get a big kick just after 6000 rpm when all power comes back.. feels good)

A few people have said to get an SAFC to fix this problem, I thought an SAFC will only alter fuel and not timming (thats the big brother Power FC).

Not looking at buying an Power FC... maybe ab SAFC...

Any info would be great.

Ps. Can you run an high flowed turbo off an SAFC or do I need the Power FC to run properly?

turbomad Community Regular

turbomad

Posted
Posted

The SAFC will certainly correct your A/F ratio and smooth out and increase your power band, if the hiflowed turbo doesn't exceed the power level of the stock injectors and Airflow meter (220-230rwkw) then the SAFC will work, but otherwise you will need the PowerFC.

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