Why does JWT recommend against using an SAFC? - Page 4

FourN2ner · May 4th, 2004, 03:39 AM

Quote:

Originally Posted by Stephen Max

They say it interferes with their program. Interferes how? Ben isn't too informative. Has anybody experienced this?

For reference, I have a 95 Maxima with a V1 blower, 3" pulley (~11.5 psi), 370 cc/min injectors, Z32 maf and the JWT modified ecu.

went to the dyno on sunday (gtir, t28, 2.5dp, 444cc inj, ser maf) put 202whp and 207fpt
@11psi on a jim wolf chip ! i had a 12.8-1 af from 3500rmp to 7200 rpm
a very good tune indeed. i did 3 runs to begin with an afc hit 194 and 195 1st run but i had tuned it a little lean on the street about 13.5 so we added across the board and hit 181 and 189 but fat as hell.....took about 5% out from 2000 rpm to 4000 in the low map and added 5-6% on the high map from about 5000 to 8000 rpm and ended at 191hp and 195fp with a
12.25 to 12.50 af @ 10 psi not bad!.....hhhhmmmm so i added fuel in the high map instead of leaning out the jwt ecu? to make more power???? aaaahhhhaa
deleted the afc and was able to add 1psi more boost and be safe on stock maf .and made decent hp for what it is now . with the tune from jwt
it wasnt rich. but while driving around in low throttle it is rich so im going to mess around with it in the near future putting back in the afc and pulling 4-5 % on the low map on a 40-60 % high low throtle and do some tuning and readings to see where the hesitations when in low throttle and back fires after i release the gas in lower throttle (under 4500rpm) are coming from ,of corse i will be on the dyno ....and i will have some more upgrades @ that point so it should be intresting .
it will be a little while i have a few races coming up

hope this is useful?

**morepower2** · May 6th, 2004, 12:26 AM

Quote:

Originally Posted by FourN2ner

went to the dyno on sunday (gtir, t28, 2.5dp, 444cc inj, ser maf) put 202whp and 207fpt
@11psi on a jim wolf chip ! i had a 12.8-1 af from 3500rmp to 7200 rpm
a very good tune indeed. i did 3 runs to begin with an afc hit 194 and 195 1st run but i had tuned it a little lean on the street about 13.5 so we added across the board and hit 181 and 189 but fat as hell.....took about 5% out from 2000 rpm to 4000 in the low map and added 5-6% on the high map from about 5000 to 8000 rpm and ended at 191hp and 195fp with a
12.25 to 12.50 af @ 10 psi not bad!.....hhhhmmmm so i added fuel in the high map instead of leaning out the jwt ecu? to make more power???? aaaahhhhaa
deleted the afc and was able to add 1psi more boost and be safe on stock maf .and made decent hp for what it is now . with the tune from jwt
it wasnt rich. but while driving around in low throttle it is rich so im going to mess around with it in the near future putting back in the afc and pulling 4-5 % on the low map on a 40-60 % high low throtle and do some tuning and readings to see where the hesitations when in low throttle and back fires after i release the gas in lower throttle (under 4500rpm) are coming from ,of corse i will be on the dyno ....and i will have some more upgrades @ that point so it should be intresting .
it will be a little while i have a few races coming up

hope this is useful?

Either your A/F meter is malfunctioning, its an innacurate dynojet one or you are about to blow up your motor. 13.5:1 with a turbo motor is suicidal and 12.8:1 is to lean even with race gas!

Mike