Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

Alright I’ll check the t slot tomorrow, hopefully going to get in my new throttle cable and bracket before I leave for work.

The compression ratio shouldn’t be notably higher than stock, stock replacement heads, stock replacement pistons but .020 over. The block was decked, potentially the amount is on the receipt somewhere. I think the magnums float around 9:1?

I don’t believe this engine is a hot runner, I’ve lasered the tanks on the rad and it read about 160 so probably 180 inside, the dummy gauge doesn’t even go to half on the dash, it sits around a quarter.

I’m currently running autolite plugs, not entirely sure what they are I bought them at advance auto, they are supposedly a direct replacement to RC12YC? Whatever the champion stock plugs were.

I’m running 87 octane currently.


You need to NOT use 87 ever in a car like yours.

87 octane is mostly fillers and junk. The Regulations regarding what can and can’t used in it.

Premium pump fuel has way tighter control over its formulation. It has far less fillers and whatever other junk they use on 87 octane fuel.