A little cam help.

[PRHeads]

Playing with inputs on the Wallace calculator.......
In order for a 9.4:1 440 to show 175psi cranking compression requires an IVC point of about 45ABDC.

Which is about what you’d get with a 268 cam....... that was advanced about a tooth off.

I’d be verifying the 175psi results with a different gauge.
Of course if the lifters are basically collapsed for the test, the numbers will be higher.
(Another reason to stay away from hyd cams)

 

[Gunner1]

Just got off the phone with Isky. After a nice talk I ordered a 292 Mega. 244@050 108 LSA on a 104 ICL 505 lift. I ordered their anti pump up lifters and a new 3 bolt T Chain. Now for a 2 week wait for them to grind it. I'll continue my tuning efforts while I wait. Thanks for all the input guys. I think this cam will work for these heads while I wait for new heads to become available. I'm thinking a set of TF 240's will fit my needs and work with this cam and pistons.

 

[PRHeads]

I like that choice.

Be interesting to see what the new cranking pressure ends up at.

 

[Geoff 2]

Isky cams are good.