New 331 dyno #'s poor!! Help!!

Jeff Chambers · 06-29-2005, 06:28 AM

You don't say what your A/F ratio was on the dyno. What timing are you running? Without knowing what the PCM was doing, there's no way to know for sure where the problem lies.

Blaster · 06-29-2005, 11:42 AM

A/F hangs right around 13 to 13.3 and timing is 14 or 15 degrees intial. We played with both to find optimal settings, my guess (although not a guru by any means) is that my problem does not lie in either timing of A/F ratio. My dyno guy runs a 9 sec twin turbo LX and I am very confident in his tuning abilty.

06-29-2005, 06:28 AM	#1
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: New 331 dyno #'s poor!! Help!! You don't say what your A/F ratio was on the dyno. What timing are you running? Without knowing what the PCM was doing, there's no way to know for sure where the problem lies. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

06-29-2005, 11:42 AM	#2
Blaster Registered Member Join Date: Mar 1999 Location: Canada Posts: 66	Re: New 331 dyno #'s poor!! Help!! A/F hangs right around 13 to 13.3 and timing is 14 or 15 degrees intial. We played with both to find optimal settings, my guess (although not a guru by any means) is that my problem does not lie in either timing of A/F ratio. My dyno guy runs a 9 sec twin turbo LX and I am very confident in his tuning abilty.

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