« previous next »
Pages: [1]

Author Topic: Max static & dynamic compression ratio  (Read 3186 times)

0 Members and 1 Guest are viewing this topic.

DEANs427

  • Full Member
  • ***
  • Posts: 138
    • View Profile
Max static & dynamic compression ratio
« on: July 22, 2012, 05:01:44 PM »
what is recognized maximum comp ratios on race gas and a non O-ringed block? is 14:1/ 11.8: too high?
using a pond block
Logged
1956 Ford Gasser 427FE
1966 Fairlane
1966 Bronco supercharged

jayb

  • Administrator
  • Hero Member
  • *****
  • Posts: 7437
    • View Profile
    • FE Power
Re: Max static & dynamic compression ratio
« Reply #1 on: July 22, 2012, 07:37:42 PM »
I don't think that's too high, Dean.  I would say with Cometic head gaskets you could go to 15:1 - Jay
Logged
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

DEANs427

  • Full Member
  • ***
  • Posts: 138
    • View Profile
Re: Max static & dynamic compression ratio
« Reply #2 on: July 23, 2012, 10:50:33 AM »
my initial target numbers were a full point lower but measurement after assembly shows I am higher than I feel comfortable with. I know what detonation can do !
Logged
1956 Ford Gasser 427FE
1966 Fairlane
1966 Bronco supercharged

cwhitney

  • Newbie
  • *
  • Posts: 24
    • View Profile
Re: Max static & dynamic compression ratio
« Reply #3 on: July 23, 2012, 07:45:26 PM »
I have a cast Iron Pond block with Cometic head gaskets with 14+ compression ratio with no issues.
Logged
Pages: [1]
« previous next »