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#11 (permalink)

07-18-2016, 02:25 PM

Jac Mac

CC Member

Join Date: Feb 2006

Location: Gore. New Zealand., SI

Cobra Make, Engine: DIY Coupe, F/T ,MkIV.

Posts: 808

Not Ranked

The cranking compression numbers (~ 185lb ) seem quite high for the cam & static compression you have mentioned and comparing your Autolite 3924 to Champion numbers ( RC12YC ) they seem too hot compared to similar stuff I have built ( RC9YC ). Can you verify following?
1. Bore & Stroke
2. Head Combustion Chamber Volume ( 58cc or 72cc ).
3. Assembled Piston to Head clearance.
4. Piston part # or dish volume.

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Jac Mac

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