SAFC II rpm reading off by about 500 rpm?

[onosqv]

Hi there, I just installed my safc and it seems it is ready the rpm by about 300-500 off during idle, and anywhere between 500-1000 (I think, hard to discern because my speedo cluster has lighting problems ) off during acceleration.

Could I have a loose connection? Or do I need something more?

[WDRacing]

Free Bump

[98s14inaz]

That is normal. Try recalibratuing it a little. When I had one of those I had my car dynoed and the shop told me that you have to set it a certain way because it is always 500rpm behind. That is piggybacks for you.

[onosqv]

Thanks for the free bump .

And I was playing with my settings. Turns out I had it set to 6 cylinder engine .

Well, it's a lot closer now, only about 50-100rpm off, livable.

[WDRacing]

Glad it worked out for you.

[Willfastbackse]

Yea, mine is the same way. Dont worry, its normal

[toki]

mine reads almost perfect at idle, about 250rpm off around 3000 rpm, and by 6000rpm on the tach the afc only sais 5550. Go figure. I was told to always go by what the s-afc sais as the "actuall" RPM, which makes alot of sense because my car was always about 5mph slower than a friend SOHC shifting at 'redline' in 1st gear. So just being an old car, the tach could have become miscalibrated.

[DSMs_Suck]

more than likely it is the tach that is off calibration.. Computers are pretty accurate with numbers and time