Fuel octane vs concistancy

[Rich Biebel]

I ran my 565 on Renegade 116 and then VP X-16. Engine has just under 15 to 1 compression.

It ran very well on both and was generally very predictable.

Tried Q-15 for a few races this year. Just jetted up 3 numbers. Q-15 is a 50-50 mix of Q-16 and C-15 I'm told.

Results were more power but consistency due to dips in throttle stop rpm intermittently gave me fits...

I have fought this t-stop issue for what seems like forever......and it occurs with an inline stop or a disc plate stop....

Switched back to Sunoco Maximal for my last 2 runs this past weekend and both runs were normal without t-stop rpm drops and this was using the disc stop.

I did not like handling the Q fuel or the smell.....and from what I see and know.....you really need to have a carb done and tuned on the dyno for the fuel your using. The Oxygenated fuel was not for me....