2008 Gt500 timing for race fuel?

[Z71]

Right now I am running around 17-18* of timing at 17psi on 93. Car runs strong with no issues.
How much more timing can i go if i run either 100-103 octane fuel for the track?

Im thinking around 4* to be on the safe side?

Thanks

[dsblk93gt]

I believe my friend ran 20-21* with 112 race gas and 19lbs of boost on his 2010. TVS with 2.39 upper and 15% lower on stock motor. He went 9.87@141.

[Z71]

Dang that’s moving. Ok cool thanks for the info.

[MRRPMBRP]

I'm running 19degrees on 93 pump 22lbs boost, but 8.8:1 compression

[Lukebourdon]

My 2012 with 18-19lbs of boost running Sunoco 260gt threw a rod and windowed the block. It was Lund tuned. Happened after 25 gallons of race fuel.

[Z71]

Ouch....wouldn’t happen to know how much timing that Lund tune had do you?

[dsblk93gt]

Ouch....wouldn’t happen to know how much timing that Lund tune had do you?

High revs are the killer for a GT500. The rods can't handle it. My buddies was tuned by Dennis Gomes.

[Lukebourdon]

I can check one if my old data logs for the timing, my red line was 6500 and the rod let go at about 3/4 throttle and 5000 rpm?s

[Z71]

I can check one if my old data logs for the timing, my red line was 6500 and the rod let go at about 3/4 throttle and 5000 rpm?s

Yeah im curious if you find out how much timing you were getting being lund tuned.