Poll on cranking compression

[wsa111]

I thought i would post this topic just to see some figures from other members of the forum, mainly engines recently done with head mods,decking, & camshaft & rocker arm changes.
With my combination i have 175# of cranking compression on a warmed up engine.
Run the engine till temp guage reads at operating termperature.
Very interested in the results.
Please give your engine combinations when posting.
Also open the throttle when performing this test. My test was done using a quality snap-on guage. Thanks William

 

[wsa111]

Come on fellows, lets get your compression guage out, I want to see what the rest of you folks are running. I'm sorry i didn't go with more compression, i'm only reading 175# with my combination. I could probably drop down to 89 octane or lower. I may snatch the head off & go from the .040 felpro to the .021 steel shim. I was really looking for about 185-190 psi# cranking compression. Thanks William

 

[Anonymous]

Bill,

I'lll check mine as soon as I get it back together...sometime hopefully in April!

Later,

Doug

 

[MustangSix]

I'm up near 195 psi on the crossflow, but I'm using Total Seal Zero Gap second rings. 9.6:1 CR. Premium fuel is needed.

You might pick up some cranking compression by advancing the cam a couple of degrees.

 

[wsa111]

Jack, I may pull the head & go to the .021 steel shim head gasket & also advance the camshaft 2 degrees. This will definately jump up the cranking compression & low end snap. Thanks William

 

[rickwrench]

140-145 all the way across on the Squire. Bone stock '65 200 block with a '66 head, composite gasket. Tested hot, throttle plate open, all plugs out.
Rick

 

[nitrousnick]

250 engine .040 over, block decked,crane solid lifter cam 175 psi

 

[wsa111]

Gentleman, thanks for your feedback. I think I will pull the head & put in the .020 thinner head gasket. As jack suggested maybe a camshaft advance in the 4 degree range would put me where i want to be.
Thanks again for you input. this post is still open, so lets hear it from you guys. William
Should I wait for mike at FSPP till the future cylinder head is offered?

 

[Anonymous]

except for the cylinders that may have blown headgasket issues , I'm at 185.

Question, what does it mean to "advance" the cam? Is that in relation to the crankshaft gearing? When I installed my FSPP cam, I set the 0's in line at TDC. That's 0 degrees then right?