Lower gears and still slugish.
IMO the problem has nothing at all to do with the transmission. It's that big lazy ground Edelbrock cam you have in it. That cam has 308 degrees of total duration so it's a huge cam for a low compression 318 and you need at least a 3000 stall to make it work right. I bet that cam doesn't even start making any power at all in a 318 below 3000 rpm
Oh..Ooooh.... noooo. Throw that cam as far away as you can. That cam has the sloooowest ramps in the world, requiring 74/2 = 37* to climb from .006 to .050.
Edelbrock makes some good stuff but cams ain't one of them. Well that's too harsh.That cam is good for something just not in a streeter.With it's 89* of overlap, it could run like the proverbial scalded cat with open headers, and a well matched Scr.Which would take more than 318 cubes.
But for your combo, that beast is ALLLL wrong.She is costing you HUGE low-rpm cylinder pressure.
Are you sitting down?
Ok, say you have a 3.94 bore,3.31stroke, and pistons down .057. 63 cc heads 5cc eyebrows. an 8.9 cc gasket. Pistons down.057, is 11.4cc
So this totals 661.32 cc swept, and 88.3 cc total chamber, for an SCr of 8.49. So far so good.
But that pig of a cam has these specs; 308/318/112/107. These numbers drop the Dcr so far into the basement, even a lawnmower has more cylinder pressure. Ok, here it comes;5.44/95psi. Let me say it again; 5.44/95psi.
For all calculations, I assumed an altitude of
2000 ft in Vegas. And an ICA of 81* the 050 numbers are 234/244, and lift of 488/510.
The ramps on these lobes are about double of what they should be. Your compression ratio is also fully 2 to 3 points too low for 2000 ft.
Now on the off chance that you brought the pistons up to zero deck , the new chamber size is 76.9, and the Scr climbs to 9.6. The Dcr would then be, hang onto your hat; 6.16/113psi.
And if there were no eyebrows, then 71.9 is the total chamber volume. And the numbers are; 10.2/6.55/122psi
No matter what,that cam has got to goooooooo! In your combo,it is all bark,no bite.
Go now! Drain the water tonight. It's not too late to get started.
