what solid cam is equivalent to a hyd 268 ?
So , are you saying this will be an improvement to what I have now ? A 318 with my erson cam with 8* advance will be way better?
the compression ratio is up to 151#'s and the cam advanced 8* will help breath and exhale more efficient .
VP is a Measure we use to compare low-rpm improvements and
NOTHING more.
You are comparing the base combo to the A combo, and the math for a TRUE 9.2 318 shows it to have a low-rpm improvement of
Plus44%
But with the 318/286 at a true 9.2,(Combo B) you can install the cam properly to and still have a
plus34% improvement, and get back the power spike at 5200ish.
AND, with the 318/286 at
10.1 (combo H), you can get an improvement of
plus50% !
I like combo H because pistons are available from KB to do it, and you get to keep that wicked cam. And with 50 more cubes, and 3.91s it will be dynomite.
If you were to build combo H, you would have to check the piston to valve clearance, and if insufficient, the piston tops would have to be machined, at added cost. And you would also have to check the piston to head clearance and try to keep the Q in a decent working range. There is only a 6% difference from a TRUE 9.2 to 10.1, so I'm not sure if it's worth pursuing from a VP-only standpoint.
K) But if the TRUE SCR of the 9.2 318 is actually 8.7, that's a hard hard hit
Static compression ratio of 8.7:1.
Your dynamic compression ratio is 7.32:1 .
Your dynamic cranking pressure is 142.37 PSI.
V/P (Volume to Pressure Index) is
112
This still with the 286 cam. Compare this with the H combo at
123VP
Now you're falling back to 112/82
= 36.6%
So if you measure the 318 at under, say 9.0, then to me the 10.1 Scr
IS worth doing, not only for the Low-rpm improvement, but for the across-the-board power increase,and for superior driveability, and for the potential for improved fuel economy ........ cuz according to the numbers, that cam has gotta suck gas pretty hard.