compression ratio
 

can i run 11:1 in a 406 sbc on pump gas 91 octane no ethanol added?
thanks
-logan

Do you have alumnum heads?
Carb or FI?

Re: compression ratio
 

You should find out what your dynamic compresssion and go from there!

carb and it'll probably have procomp aluminum heads unless i can afford more when the time comes

Pro Comp are junk
 

Save your money and buy USA Made Heads!!!!
Pro Comps are junk.
Have bad installed valve guides,some have stripped stud threads, some are 20
to 30'' of being straight,some come cracked, and many other problems with
cheap labor.
I sold Pro Comps for 3 months out of 74 sets I've sold after 2-8 months
39 sets had minor to major issues. 23 sets were unrepairable or too expensive
too even attempt to fix.
JMO Save your money buy AFR,Brodix,RHS,Dart heads. 8)

Only a rich man can afford to buy junk because he has plenty more to dig himself out if all else fails.

Re: compression ratio
 

x2

Compression
 

Have you looked at water/alcohol injection? Reduces detonation potential.

Was a fad a few years ago and its back again. I see it in JEGS.

You can use windshield washer fluid.

It is $300 approx for the kit.