Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 195 PSI 10.3 to 1 compression on street fuel
View Single Post
  #2 (permalink)  
Old 08-07-2010, 07:58 AM
454C10 454C10 is offline
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 53
Posts: 4,023
Wiki Edits: 0

Thanks: 0
Thanked 26 Times in 26 Posts
depends what engine and heads and load. what engine are you talking about? What car? do you plan to pull a trailer? what gear and trans?

If it is a 454 with stock iron heads then I would say no.

if it is a 350 with flat tops and vortec iron or aluminum heads then I would say, no problem with 93 octane.

If it is a 1100cc honda then it would be ok too.

some of things that effect octane requirement are flame speed, piston diameter, head material, head chamber design, and others.......

10.3:1 cr with 195psi of cranking pressure means the cam is fairly mild.

would require 93 octane in most cases.
Reply With Quote