vntned
Well-Known Member
Alright so I'm about to redo the engine/trans/rear-end/brakes on my '77 D100. The truck is a single cab long bed and weighs 3800lbs without me in it. It's a 2wd with a 318/727/8.25 in it. It haos served as an on and off daily driver and my only truck for more than 5yrs now. The old original drivetrain had around 185k on it and was just totally worn out.
The goal is to make it a reliable daily driver, that performs like a truck should, and is fun to drive and hotrod around in some.
So the engine build so far consists of the following
'73 318 (measured at an actual 9.1:1scr)
Stock crank and rods
0.030" over factory replacement pistons
MP windage tray
High pressure oil pump
"302" heads (gasket matched, ported, cut 0.030, 1.88/1.60 valves, MP valve springs and retainers)
Eddy LD340 intake (gasket matched, center divider knife edged)
1" phenolic spacer
Street Demon 625cfm carb
MP electronic distributor
MSD Streetfire plug wires
Hedman block hugger headers
Fully rebuilt A727 trans
New 2200rpm torque converter
8.75" rear end with a 3.23 SureGrip
So all this is locked in. These are the parts and specs of what I already have ready to go. I'm not changing anybody the aforementioned parts.
Now here is the question: Should I keep the cam that is in it, or should I get a milder grind?!
(and for all you guys that are gonna bash off the shelf cams and say I'm an idiot for not getting a custom grind, don't waste you're time responding).
It currently has a MP P4452761 cam in it.
Style:Hydraulic flat tappet
Basic Operating RPM Range:1,500-5,800
Intake Duration at 050 inch Lift:228
Exhaust Duration at 050 inch Lift:231
Advertised Intake Duration:268
Advertised Exhaust Duration:272
Intake Valve Lift with Factory Rocker Arm Ratio:0.450 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.455 in.
Lobe Separation (degrees):110
The goal is to make it a reliable daily driver, that performs like a truck should, and is fun to drive and hotrod around in some.
So the engine build so far consists of the following
'73 318 (measured at an actual 9.1:1scr)
Stock crank and rods
0.030" over factory replacement pistons
MP windage tray
High pressure oil pump
"302" heads (gasket matched, ported, cut 0.030, 1.88/1.60 valves, MP valve springs and retainers)
Eddy LD340 intake (gasket matched, center divider knife edged)
1" phenolic spacer
Street Demon 625cfm carb
MP electronic distributor
MSD Streetfire plug wires
Hedman block hugger headers
Fully rebuilt A727 trans
New 2200rpm torque converter
8.75" rear end with a 3.23 SureGrip
So all this is locked in. These are the parts and specs of what I already have ready to go. I'm not changing anybody the aforementioned parts.
Now here is the question: Should I keep the cam that is in it, or should I get a milder grind?!
(and for all you guys that are gonna bash off the shelf cams and say I'm an idiot for not getting a custom grind, don't waste you're time responding).
It currently has a MP P4452761 cam in it.
Style:Hydraulic flat tappet
Basic Operating RPM Range:1,500-5,800
Intake Duration at 050 inch Lift:228
Exhaust Duration at 050 inch Lift:231
Advertised Intake Duration:268
Advertised Exhaust Duration:272
Intake Valve Lift with Factory Rocker Arm Ratio:0.450 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.455 in.
Lobe Separation (degrees):110