got some ?'s about my tune----->

[texas_outlaw93]

Alvin i got some dyno numbers finally, they werent too bad but i know that there is a lot of power that i left on the table with my A/F ration. basically i put down 322hp/440tq, but my a/f was around 15-17.5. i know my tq was a mistake but the power is a little low. i was wondering though, when i sent you the chip to get retuned i noted that i use 104 race fuel, so could that be the cause of the lean a/f ratio? if you want i can email you the dyno sheet so you can check it out.

[Teeeman]

322/440?


Did I read that right?


440?


If you made 440, that car should top 400RWHP.


Terry

[harvickgm]

WOW!!! 15-17 AFR. i didnt think it would run that lean, or blow up one of the 2

[pcmforless]

whoa, honestly the AFR could be off by say a point or maybe even two with a mail order tune but your completely out of the ball park.

Did you guys watch fuel pressure? I'll bet you have a pump problem.

The leaded race gas will kill the o2's.



Do me a favor and before you send it back at least put a fuel pressure gauge on it and go do a wide open throttle blast somwehere.. make sure the fuel pressure isn't dropping.

[harvickgm]

that race fuel will burn up those in tank fuel pumps quicker too

[pcmforless]

that race fuel will burn up those in tank fuel pumps quicker too


I don't know where you got that from but that isn't true.

[harvickgm]

in my buddy's 96 he runs 104 and for some reason we have changed his fuel pump twice, and then he went back to regular 93 and didnt have a problem, i told him he didnt need it for his stock WS6 so he went back to 93 octane. so it may not be true but thats my guess from a personal experience