Dom...Byron results???

[Paul Workman]

So...Do tell how Byron datalogging went yesterday! (I couldn't get away in time to make the trip [sigh]).

P.

[-=Jeff=-]

Yeah?? how did it go?

You ready to port the heads now for more power???



paul,

good seeing you for lunch on Friday..

[XfireZ51]

Originally Posted by -=Jeff=-

Yeah?? how did it go?

You ready to port the heads now for more power???



paul,

good seeing you for lunch on Friday..

Jeff,

I think there's more "bang for the buck" with new tires and a new driver.
The trap speeds are indicative of a low 12 car right now without heads but a 2.3 60' isn't going to get there. Not to mention 2nd gear.

[XfireZ51]

Originally Posted by Paul Workman

So...Do tell how Byron datalogging went yesterday! (I couldn't get away in time to make the trip [sigh]).

P.

Paul,

It was a beautiful day with few drivers out there. I'd already done 5-6 runs by noon. But the launch was more like "budda". Lousy 60". My best time came with tires at 29.5psi, 2.1 60", a 12.9 x 117.26mph. I will say there was a headwind today at Byron. The track faces south and that's where the wind was coming from which provided the 72d temps. DA corrected times were in the 12.6 @ 119+mph.
I was able to datalog one run. Looks like there's run to lean things out a bit. Little to no knock retard.

[Paul Workman]

Originally Posted by XfireZ51

Paul,

It was a beautiful day with few drivers out there. I'd already done 5-6 runs by noon. But the launch was more like "budda". Lousy 60". My best time came with tires at 29.5psi, 2.1 60", a 12.9 x 117.26mph. I will say there was a headwind today at Byron. The track faces south and that's where the wind was coming from which provided the 72d temps. DA corrected times were in the 12.6 @ 119+mph.
I was able to datalog one run. Looks like there's run to lean things out a bit. Little to no knock retard.

Ah, sorry 'bout the traction? As for leaning, what ratio have you found seems to work best for your LT5? Would it be around 13.0-13.5 (as some have suggested)? (Assuming you do run you wide-band sensor on the track, yes?)

P.

[jonszr1]

when corey tuned my car we found that we made the most power @12.8. and 26.5 total timing. but we tuned my car on 91 oct as that is all we have out my way

[XfireZ51]

Originally Posted by Paul Workman

Ah, sorry 'bout the traction? As for leaning, what ratio have you found seems to work best for your LT5? Would it be around 13.0-13.5 (as some have suggested)? (Assuming you do run you wide-band sensor on the track, yes?)

P.

Paul,

I think the idea is to be a bit rich at torque peak since this is the most likely area where you'll experience knock retard, then lean it out as you head to top end. I would not go any leaner than 13.1 for the top.
Yes I did datalog a run this Saturday, and the AFR looked a bit fat. I had little to no knock retard so I could lean it out a bit and/or try some additional timing.

[XfireZ51]

Originally Posted by jonszr1

when corey tuned my car we found that we made the most power @12.8. and 26.5 total timing. but we tuned my car on 91 oct as that is all we have out my way

The 91 octane would cause the lower advance. Having seen other Corey cals, he's more aggressive than that