I want a different cam for my 520 engine. I purchased this engine knowing that I would most likely change the cam out and have decided to do just that.
It is going in to a 4000lb car with 727 (unknown but low stall TC, willing & wishing to purchase new TC & flex plate to compliment combination), 3.23s, 235/55r17=27" tires.
No drag racing, need stop & go traffic & long distance capable driver able to blast past slugs and trucks in a hurry when motivated to do so.
The engine I have to work with (and limit work to valve train/TC) is as follows:
'77 RB block, 4.375x4.375
Heads are Promaxx with some more bowl work, cc'd & port matched to intake. I realize that these will limit max output numbers, but they will work for what I am after for now.
Edit: 84cc chambers
Valves are 2.14int & 1.81ex
7.1 rods with Icon 10.25cr pistons. (Don't know quench)
ARP rod & head & engine kit bolts
Port matched Performer RPM intake (have unworked Holley SD if better) with Quick Fuel 780 vac. sec. carb
MSD 8546 dist, 6al, blaster 2 coil & 8.5mm MSD or Firecore wires (have both)
1 7/8 x 3" headers to mufflers then 2 1/2" pipes to rear bumper.
The cam & valve gear is what I am concerned about as the cam has more duration (300* adv)than I want for intended use and I found it has StreetMaster roller rocker arms on top. (I question the reliability of them?)
The springs are good to .600 and current lift is .540 but I do not know what they are or their rates/specs so wish to match to new cam & lifters.
Engine has Elgin heavy wall push rods & 3-bolt billet cloyes timing set.
The engine is freshly broke in with 630tq @ 3700 and 551hp @ 5300 as it sits which is plenty for my 'driving style' but I need better street manners.
I need to add that I have hydroboost standing by for power brakes if needed and am open to solid flat tappet grinds if best for what I listed.
I am leaning toward hyd FT for easiness on parts and durability but do want to make the most of what I have to work with as well.
I recently met an MOPAR engine builder who says he specs cams & will do the work BUT I would like some other input to compare to what he says.
I will be giving him the same info as above and will share what he says as well.
So, looking for new cam, lifters, springs & rocker arms, torque converter & anything else (AS NEEDED & recommended) to max performance AND reliabilty.
I don't want to waste any more money but have saved up for just this & want what is BEST not cheapest for my needs.
Edit again: MUST RUN ON 91 CA SWILL (not screaming but must emphasize this...)
I hope this is enough info to get the brainstorming started and appreciate and look forward to the recommendations.
Thanks!
It is going in to a 4000lb car with 727 (unknown but low stall TC, willing & wishing to purchase new TC & flex plate to compliment combination), 3.23s, 235/55r17=27" tires.
No drag racing, need stop & go traffic & long distance capable driver able to blast past slugs and trucks in a hurry when motivated to do so.
The engine I have to work with (and limit work to valve train/TC) is as follows:
'77 RB block, 4.375x4.375
Heads are Promaxx with some more bowl work, cc'd & port matched to intake. I realize that these will limit max output numbers, but they will work for what I am after for now.
Edit: 84cc chambers
Valves are 2.14int & 1.81ex
7.1 rods with Icon 10.25cr pistons. (Don't know quench)
ARP rod & head & engine kit bolts
Port matched Performer RPM intake (have unworked Holley SD if better) with Quick Fuel 780 vac. sec. carb
MSD 8546 dist, 6al, blaster 2 coil & 8.5mm MSD or Firecore wires (have both)
1 7/8 x 3" headers to mufflers then 2 1/2" pipes to rear bumper.
The cam & valve gear is what I am concerned about as the cam has more duration (300* adv)than I want for intended use and I found it has StreetMaster roller rocker arms on top. (I question the reliability of them?)
The springs are good to .600 and current lift is .540 but I do not know what they are or their rates/specs so wish to match to new cam & lifters.
Engine has Elgin heavy wall push rods & 3-bolt billet cloyes timing set.
The engine is freshly broke in with 630tq @ 3700 and 551hp @ 5300 as it sits which is plenty for my 'driving style' but I need better street manners.
I need to add that I have hydroboost standing by for power brakes if needed and am open to solid flat tappet grinds if best for what I listed.
I am leaning toward hyd FT for easiness on parts and durability but do want to make the most of what I have to work with as well.
I recently met an MOPAR engine builder who says he specs cams & will do the work BUT I would like some other input to compare to what he says.
I will be giving him the same info as above and will share what he says as well.
So, looking for new cam, lifters, springs & rocker arms, torque converter & anything else (AS NEEDED & recommended) to max performance AND reliabilty.
I don't want to waste any more money but have saved up for just this & want what is BEST not cheapest for my needs.
Edit again: MUST RUN ON 91 CA SWILL (not screaming but must emphasize this...)
I hope this is enough info to get the brainstorming started and appreciate and look forward to the recommendations.
Thanks!
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