MileHighDart
Well-Known Member
Ok, I know this has been beat to death, and I have read thread after thread and I think I have a pretty good idea what cam I should run, just want to bounce it off you guys. I'll give you my engine/car specs and intended use, and the two cam choices I've narrowed it down to
Engine:
1971 - 318, .030 over so its actually 323cu in.
Weiand Stealth 4bbl intake manifold
Edelbrock 1406 Carb
Heads are Late 70's 318 with 1.88 and 1.60 valves, Mild porting job following 318willrun's post. Heads cc at 65
Pistons, unknown brand but sit .030 in the hole.
I figure with the thin head gaskets I'll be at 9.0 static compression
Rotating assembly with be balanced.
Doug's d453 ceramic coated headers in to 2.5" exhaust, with H pipe
Car is 1968 Dart, with 904 auto, stock converter, 8-3/4" rear, pegleg with 3:23 gears
25" tires.
Intended use: Cruising on weekends, the occasional commute to work, and maybe a once a year trip down the 1/4 mile. Would like plenty of low end torque. I will be staying with my 3:23 gears as I do a lot of Highway driving, like 90% highway, 10% in town.
Will stick with stock converter, or possible factory high stall, (although I don't know what stall the factory high stall converter is).
Cam choice after doing research here, and using Comp cams cam selection simulation program, I've got it down to these 2
XE256H operating range 1000-5000, peak tq at 3500rpm, peak hp at 5000 recommended stall 1600 - 2600. Comp's simulation show 322hp at 5000 and 379tq at 3500
XE252H operating range 800-4800, peak tq at 3500rpm, peak hp at 4500 recommended stall 1400-2400 Comp's simulation show 293hp at 4500 and 377tq at 3500
Both have about the same torque at 3500, 29 less hp with the xe252 but makes it at 4500 instead of 5000rpm.
Discuss
p.s. I am at about 5200 ft altitude
Engine:
1971 - 318, .030 over so its actually 323cu in.
Weiand Stealth 4bbl intake manifold
Edelbrock 1406 Carb
Heads are Late 70's 318 with 1.88 and 1.60 valves, Mild porting job following 318willrun's post. Heads cc at 65
Pistons, unknown brand but sit .030 in the hole.
I figure with the thin head gaskets I'll be at 9.0 static compression
Rotating assembly with be balanced.
Doug's d453 ceramic coated headers in to 2.5" exhaust, with H pipe
Car is 1968 Dart, with 904 auto, stock converter, 8-3/4" rear, pegleg with 3:23 gears
25" tires.
Intended use: Cruising on weekends, the occasional commute to work, and maybe a once a year trip down the 1/4 mile. Would like plenty of low end torque. I will be staying with my 3:23 gears as I do a lot of Highway driving, like 90% highway, 10% in town.
Will stick with stock converter, or possible factory high stall, (although I don't know what stall the factory high stall converter is).
Cam choice after doing research here, and using Comp cams cam selection simulation program, I've got it down to these 2
XE256H operating range 1000-5000, peak tq at 3500rpm, peak hp at 5000 recommended stall 1600 - 2600. Comp's simulation show 322hp at 5000 and 379tq at 3500
XE252H operating range 800-4800, peak tq at 3500rpm, peak hp at 4500 recommended stall 1400-2400 Comp's simulation show 293hp at 4500 and 377tq at 3500
Both have about the same torque at 3500, 29 less hp with the xe252 but makes it at 4500 instead of 5000rpm.
Discuss
p.s. I am at about 5200 ft altitude
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