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Ol' Ron · 05-05-2019, 10:58 AM

I did some flow testing with combustion chambers and found the transfer area to be the only place flow could be improved. Relieving the block only improved flow if the transfer area was very low to increase compression. The best chamber was with a 10 degree angle of the transfer area with a 60 deg exit. Unfortunately this lowers compression. JWL put me on to the EAB head which is close to this. so just improving the exit of the relief woll accomplish the same thing. Re shaping the chamber in a new casting could increase the CR with out affecting flow. I made up some wooden chambers for testing. Have some pics, will try to find them.

05-05-2019, 10:58 AM	#13
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,854	Re: Relieved Ford V8 block I did some flow testing with combustion chambers and found the transfer area to be the only place flow could be improved. Relieving the block only improved flow if the transfer area was very low to increase compression. The best chamber was with a 10 degree angle of the transfer area with a 60 deg exit. Unfortunately this lowers compression. JWL put me on to the EAB head which is close to this. so just improving the exit of the relief woll accomplish the same thing. Re shaping the chamber in a new casting could increase the CR with out affecting flow. I made up some wooden chambers for testing. Have some pics, will try to find them.