Results 1 to 10 of 26

Thread: F-head high altitude head?

Hybrid View

  1. #1
    Super Moderator bmorgil's Avatar
    Join Date
    Dec 2018
    Location
    Northwestern Ohio
    Posts
    3,666
    Yes the precision of the fuel delivery is important but, you still see the best "all out" horsepower from a carburetor. As old as that design is, on the dyno a well tuned carb has been proven over and over to make the maximum power. We have now seen the latest design heads make awesome power, with a carburetor and 11 to 1 compression on 87 octane. The emulsification of the fuel and air mixed well and far ahead of time is the key. The other tell tale of the efficiency in the combustion chamber design is the total timing required. As the combustion chamber efficiency increases the amount of total timing required for complete combustion decreases. This is also a huge help in preventing detonation. A Gen 1 GM small block would usually make the best power approaching and sometimes exceeding 40 degrees of total timing. A modern GM LS doesn't need any more than 30 with racing engines running around 34 on race gas. The newest design combustion chambers combined with the precise timing and fuel control of injected computer controlled engines, provide the unbelievable "best of both worlds" we now see from autos. Great power, smooth drive-ability in all conditions, fuel economy and low pollution. Now keep in mind, if it does start to detonate on a computer controlled engine, it will adapt. Power will be reduced. On a non computer controlled engine, you may want to back that 11 to 1 down a bit just in case!
    Attached Images Attached Images
    Last edited by bmorgil; 04-17-2024 at 06:11 PM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •