Pre crossflow Engine experts HELP!

[Gearbox]

Hi All, I have a bit of an obscure question that I cannot find anywhere. I'm building a 1340 109e with a 116e head. What was the standard combustion chamber volume in cc's and are they the same? Thanks Allan

[TheDingo8MyBaby]

Allan,

 

It depends on the 116e head you're using. From my notes, Low comps were 52cc, high comps 41cc and GT 36cc, but I cant guarantee those numbers. It would be best to measure.

 

-Geoff W

[Gearbox]

Hi Geoff;

 

I just dropped off the engine at my machinist and should find out shortly. But in the meanwhile, outside of the L,H, and GT was the 109e head the same in combustion chamber cc's as the 116e head? I believe I have a H head so will the cc's be the same as a 109e H head? I'm trying to determine if by using the 116e will it lower my CR substantially or not and how much can I cut the head to achieve the CR I want which would be about 9.5 or 10:1. Thanks Allan

[TheDingo8MyBaby]

Hi Alan,

 

From what I can tell from my notes (again - I make no guarantee of accuracy), it looks like 1340's H had a volume of 39cc, so you may be close.

 

I've used this calculator before and verified with hand calculations.

 

http://www.csgnetwork.com/compcalc.html

 

Bore will be 80.97mm, stroke is 65.08. The rest will depend on your head gasket, block, etc.

 

-Geoff