Thread: wondering if I can run a 3.4 pulley on my car by boosting octane?

wait till you get a plog, downpipe and or headers.


just pumping up the octane wont do anything really.

...cam, youre wrong.

yes, you could probably get away with bumping up the octane and running a 3.4 pulley. however, bumping up the octane by one or two points will net you nothing and youre better off on a stock pulley. you wont be able to get any real amount of octane unless you mix your own race gas and use a few gallons of that every tank.

therefore, dont even debate it and work slowly by accumulating parts and then putting them all on later.

if you fill with cam2 112 or 116 sure. Otherwise i wouldnt do it

That's how it was done in the old days...stupid small pulley...stupid high octane...it killed the knock for sure.

wutever. its still not even close to worth it to be putting race gas in the car, cuz it cost so dam much.

Yeah, it costs enough just using 93!

good thing there are recipes all over the web for making your own race gas on the cheap.

Originally Posted by Fivefingerdeathpunch

wutever. its still not even close to worth it to be putting race gas in the car, cuz it cost so dam much.

yeah $6.70 a gal for 110 here at phillips 66 lol

Originally Posted by 1998DaytonaPaceCar

yeah $6.70 a gal for 110 here at phillips 66 lol

Lol well in the okc 110 is only $6.00 look at the savings!! lol

anyway on the subject i have a 3.4 with 3in cat-less dp, and exhaust,cai,ngk's, accel wires running 93 w/octane booster every tank and maybe on a bad day hit 2 degrees kr with no pcm tune. i guess every car varies. like some people have more mods then me with the same pulley and are pushing 10-12 psi. I spike 9-9.5 and hold around 7-8 psi just varies i guess

More boost means you need more flow mods...I'd be scared if my 3.4" setup was making 12psi.

my car made 11psi on the 3.2 in summer, 13psi on the 3.4 in winter. it was a beast.

Don't make me say boost stack to get you started