[er455]

Ok I am setup to run e85 with 25 degrees of timing but I moved to an area we’re E85 its pretty far to get now . I need to know how much boost are you guys able to run on 93 octane with what timing #s , also I have a 468 with 9.5 to 1 compression with cast iron heads .... also any body using a separate methanol injection kit with 93 ?? Thanks for any advise

[v869tr6]

When I had a blowthru I would run 20 degrees of timing, 15 to 16 psi in the carb hat, 91 octane and 500ml of -50 washer fluid sprayed thru a nozzle about 3 feet before the carb hat. Seemed to work great, still running the same untouched short block today.

[er455]

Thanks for the reply , Wow that seems like a lot of boost for 91 octane , I was running 14 # on e85 . Ok so I need to find a methanol kit , how do you know if it’s knocking ? Knock sensor on a Pontiac ??

[JSPONT]

8.75 comp., 12 psi so far 93 octane. I will go to at least 15 psi.
You at 9.5 to 1 might be pushing it at 15 psi.
I bought a snow meth kit, never installed it yet. I do have a real good intercooler now, still air to air.
Jeff Pallazo runs 17 psi on pump gas. Read plugs always,
My timing is locked at 25 degrees.

[er455]

Thanks jspont I guess it’s do able then. Unfortunately I took my intercooler off due to running hot on the highway with ac on .

[er455]

How do you guys know it’s not detonating because you can’t always hear knock at wot ?

[JSPONT]

Reading the plugs, if you turn up the boost a few lbs at a time, make a pull, then pull plugs to read them. Do not just pull 1, some cylinders run leaner than others.

[er455]

Jeff are u running aluminium heads ?

[JSPONT]

Yes I am KRE d ports, Jeff Palazzo runs 6x heads

[JSPONT]

There is a point on the street where is does not matter. No matter what the TV shows say, LOL. There is only so much you can put down on the street with out real good power management. Then it becomes how long do you want to spin for. I am going auto now, but the the stick shift sometimes it go scary. 3rd gear would spin with MT drag radials. when it stays straight it is not bad, when it goes to the next lane it gets the heart pumping hard!!
8psi is a good # for me on the street. 12 was a spin fest.
Problem is you love the sound. More boost the whine/ waste gate and bov get louder, and I like that!! My waste gate dumps down not back into the exhaust.