You dont have enough timing adjustment/mods to use racegas. Unless ur running boost or a hefty N/A setup or nitrous, its money wasted.

 

Nah your thinking of AVGas, its the same octane rating as race fuel but its LowLead

 

Ahh gotcha. So how are those new settings doing?

 

I havent bumped my timing up yet. Run that 89 Tow tune i gave you earlier. With 87 I was getting 15mph. Just by running 89 and not changing anything else on that tune, I gained .6mpg so im up to 15.6mpg. Ill retune tomorrow and see what it does.

 

Now do you mean run 89 gas octane on my 87 tow performance tune?

 

here are my settings as of now

91 tune -
torque converter settings at max positive values
timing= +1.00
WOT=1.80
firmness= 12-12-0
rev limiter 5700
shift points= 1-2 5250 2-3 5400 3-4 5000

^^^those same settings with stock lvl 3 91 timing and only 1.3 WOT i put down 225hp and 250Ftlbs to the wheels. now with the timing advance i can fell a increase it the seat of pants dyno so i need to re dyno

 

[quote=JCP281;603016]Ill tell you this:


Adjusting timing is brutally simple, and more times than not is just time consuming. Timing adjustments are where you get the majority of your power gains. You can sneak out some power with the fuel settings, but more times than not fuel is used as your safety factor.


My friend did exactly what you just said and he cracked a piston. On top of it, he's a mechanic, maybe a hard headed one cause i told him not too do that.

I know what you are saying makes sense, but his motor didn't ping until there was blow by coming out of the valve cover breather

this was a 347 stroker out of a fox body mustang and not a modular motor, but same concept

 

[quote=StonedGreen;608590]Timing on a distributer is not really the same thing as going in through the computer. It is a lot more controlled via the computer. I would expect a mechanic to realize the differences.

 

Seems like you got yourself a nice set of tunes that seem to be working for ya.Still trying to get a feel for mine and seeing what works

 

Up to 16.5mpg running 89 octane on the 89 tow performance tune. Still have yet to adjust timing to 1.00 to see what that does. But honestly im pleased with the 16.5mpg