compression
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73sprint
compression
I think the sprint head i am rebuiding has been skimmed twice. It measures 119.6 mm from the cam journal to the head face. What happens if it runs with too much compression ? All standard sprint engine and carbs by the way.
Re: compression
More hp.
Jeroen
Jeroen
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com
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Jon Tilson
- Guest contributor
- Posts: 11179
- Joined: Tue Oct 03, 2006 9:45 pm
- Location: Middlesex
Re: compression
Risk of detonation and piston failure...
Very common on Sprints especially with modern fuels and hotter climes...
Use a thicker head gasket. Be very careful with ignition timing and listen for "pinking" when running.
Jonners
Very common on Sprints especially with modern fuels and hotter climes...
Use a thicker head gasket. Be very careful with ignition timing and listen for "pinking" when running.
Jonners
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.
Re: compression
Skimming in total 1,5mm of the head and engine deck together makes me use octane 98 at a minimum. When a head is skimmed the normal way 2 times i would not worry. If the engine then pinks there's something wrong with your mixture or you have ignition wear. My advise would be use a normal gasket and enjoy the few hp's more.
Jeroen
Jeroen
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com