2camaros6702

iTrader: (2)

Going to the track this weekend and going for a PB. I have the car running good on pump gas and was wondering if mixing some race gas in it would get me a tenth or two??

The car is a full weight 02 Z28, stock short block, PRC 2.5 5.3L heads I think the CR is around 11.8 or so, cam is 233/239 - 602/605 on 113. I am going to spray it with a 175 shot. The car has gone 1.36 60' 6.5 1/8 @ 103 on a 150 shot with pump gas. I want sub 6.5's!!


Will race gas get me a little more and what gas would you suggest??








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Dynospeed

iTrader: (3)

Are you running a stand alone fuel cell? It's over kill but I would run c116.

2camaros6702

iTrader: (2)

No stand alone, just going to mix it. The nitrous is also a dry shot.

Chris@NitroDaves

I would see if you can find some 110octane unleaded race gas and use that.

TA6spdRDC

iTrader: (2)

I use VP ms109

speedtigger

iTrader: (16)

I asked a similar question of the nitrous guys on The Bullet. My understanding of Monte Smith's explanation was maybe, maybe not. The fuel burns a little slower and might change your a/f ratio as well. So, if your car is optimized for pump gas, better fuel may need more timing to get a complete burn. And you may have to tweak your a/f tune to get your optimum a/f ration back.

I came away with the main benefit being a wider tuning window with more margin for error, but not necessarily faster. And of course the general YMMV type stuff. Also, my C/R is only 10.9:1

http://www.yellowbullet.com/forum/sh...d.php?t=532106

2camaros6702

iTrader: (2)

Thanks that is a little more what I was looking for.

TeEnAgE pHeNoM

iTrader: (6)

Blindly mixing leaded race gas changes your stoich point and will more than likely lean out your a/f ratio. Also, not knowing the EXACT mixture makes it impossible to calculate the correct stoich point in order to compensate in the tune. I recommend shell urt 110. It's an unleaded race gas that doesn't change stoich point and they claim that it's just as good as any other 116 race fuel.

Mike 02T/A

iTrader: (28)

Update?

2camaros6702

iTrader: (2)

Did not add the race gas to keep my 3 year old tume in check and left the 150 shot in.

First pass
60' 1.42
1/8th 7.0 @ 81mph
= tranny hit the rev limiter on the 2-3 shift and did not shift to 3rd. I was not going to run it again but my tranny guy was there and he said make a motor pass and see how it did. We did and all was good. So we sprayed it again.



Second nitrous pass
60' 1.41
1/8th 6.52 @ 103mph

speedtigger

iTrader: (16)

Congratulations! You just beat the top fuel 1/8th mile record by over a full second!!

2camaros6702

iTrader: (2)

LOL!! Fixed

TeEnAgE pHeNoM

iTrader: (6)

What's the car run on motor? Also why not just up the shot to 200 to go for sub 6.50?