Vacuum Secondary Conversion

Great write up thank you for taking the time to explain all this. I think I understand most of it. BTW the engine is in the car. I did have it running for a short time. I putt 3:55 gears in the rear. I am trying to get some incremental improvements prior to a complete rebuild. I know at some point I will need to do this but it mostly a money issue. If I had lots of money I would rebuild it with aluminum heads and a stroker kit. I just want to try and drive it for just a little while I save up for a rebuild or get lucky and make it workable for a little while.

I’ll say it again. An aluminum head has no more detonation resistance than an iron head.

You can use pump gas and 12:1 compression but you have to relearn how to tune and set up the engine.

Never let anyone tell you how to do unorthodox compression ratios and pump gas when they have never done one. That’s number ONE.