Compression Ratio per Camshaft Size
AJ- what static CR are you running with those three cams and what test pressures did you see with those?
I included some of that information in the Post.
My 367 fell together at 10.73 Scr. The first cam was the DC292.
With an Ica of 70*, the pressure was just about 163psi
Advancing the cam to in at 66*, this improved to 170psi.
I took the engine out and had the decks milled to Zero, and the New Scr was 11.1, with pressure rising to 180.
before the summer was out, I knew that cam was a bad choice, so I sold it and slammed the 223/110 cam in there, at 61*Ica and the pressure spiked to 188. I thought there was room for a lil more so I reset the Ica to 59, for 192psi.
Now, in those days, I was pulling the 367 out every fall for freshening over the winter. I had been running the 028 gasket at zero deck, but when I put it together with the smaller cam, I used the 039, and reset the Ica to 64*. With the new Scr of 10.82, the pressure came in at 176
When that cam dropped lobes, I replaced it with a 230/110, and I had the decks lowered ~.007 for a new Scr of 11.0, and an Ica of 64* The new pressure was 181.
One winter, I advanced this cam a few degrees, and 184psi was the result, and I think it's been there ever since.
All these pressure numbers come from the Wallace calculator, cuz this is going back 25>20 years, and I don't remember all thatchit. Back then, I didn't keep records cuz I had never heard of FABO, and just wanted to drive the thing.
My gauge reads a lil higher, in the range of 2 or 3 percent..
With alloy heads, all of these ran full-timing with 87E10.
My heads are uncut OOTB Eddies
Car went 93mph in the Eighth, with the 230 cam, in straight-up.