Expected Horsepower/Cam Suggestions?
11-21-2008, 08:51 PM
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Staging Lane
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Expected Horsepower/Cam Suggestions? My father and I have built up our 1968 Camaro over the last 6 years. For Christmas this year I just ordered him the Zex Perimeter plate nitrous system, blow down tube kit, bottle blanket, nitrous pressure gauge, and the purge kit. I'm also most likely ordering a new nasty camshaft to really open the engine and take full use of the nitrous. My question is (since I have not had the car officially dynoed) what power would you expect from the current combination as well as the upgraded combination.
Current engine specs:
388ci sbc (4.060 x 3.75, 5.7 rod)
350 sbc block, 4 bolt mains
Eagle forged 4340 rods and crank
JE forged pistons, 12.5:1 compression ratio
Dart Pro 1 CNC 227cc, 66cc chambers, 85cc exhaust
2.08/1.60 valves, 1.55 Dual springs (currently 195lbs closed, 523 open)
309/226 cfm at 0.700" lift
Dart ported matched high rise single plane intake
2 inch carb spacer
750cfm Race Demon
Comp Cams hydraulic flat tappet 248/248 @ .050, .565"/.565" lift
1.5 Crane gold race roller rockers
MSD 6AL ignition, MSD Pro Billet Distributor
Hooker Super Comp 1 7/8" headers
Max RPM: 7,000
I estimate around 600-625hp on 114/116/118 octane w/e the dyno shop has
New Setup (just changing the cam):
Comp Cams custom grind solid roller
4/7 Swap 257/264 @ .050, .644/.632 w/ 1.5
or .686/.674 w/ 1.6
110 LSA
Max RPM: 7,200-7,500
Looking to make 700hp on 114/116/118 octane w/e the dyno shop has
Your thoughts on power?
Also, I was quote another cam because this cam listed above is good for 250hp while this cam here is good for 300hp (nitrous hit):
Comp Cams custom grind solid roller
4/7 Swap 260/270 @ .050, .645/.645 w/ 1.5
or around .688/.688 w/ 1.6
112 LSA
Max RPM: 7,200-7,500
Which cam? Power expected?
I know it's a long *** post, but I really wanna hear some good opinions hopefully. Thanks guys and let me know if you need anymore info
Current engine specs:
388ci sbc (4.060 x 3.75, 5.7 rod)
350 sbc block, 4 bolt mains
Eagle forged 4340 rods and crank
JE forged pistons, 12.5:1 compression ratio
Dart Pro 1 CNC 227cc, 66cc chambers, 85cc exhaust
2.08/1.60 valves, 1.55 Dual springs (currently 195lbs closed, 523 open)
309/226 cfm at 0.700" lift
Dart ported matched high rise single plane intake
2 inch carb spacer
750cfm Race Demon
Comp Cams hydraulic flat tappet 248/248 @ .050, .565"/.565" lift
1.5 Crane gold race roller rockers
MSD 6AL ignition, MSD Pro Billet Distributor
Hooker Super Comp 1 7/8" headers
Max RPM: 7,000
I estimate around 600-625hp on 114/116/118 octane w/e the dyno shop has
New Setup (just changing the cam):
Comp Cams custom grind solid roller
4/7 Swap 257/264 @ .050, .644/.632 w/ 1.5
or .686/.674 w/ 1.6
110 LSA
Max RPM: 7,200-7,500
Looking to make 700hp on 114/116/118 octane w/e the dyno shop has
Your thoughts on power?
Also, I was quote another cam because this cam listed above is good for 250hp while this cam here is good for 300hp (nitrous hit):
Comp Cams custom grind solid roller
4/7 Swap 260/270 @ .050, .645/.645 w/ 1.5
or around .688/.688 w/ 1.6
112 LSA
Max RPM: 7,200-7,500
Which cam? Power expected?
I know it's a long *** post, but I really wanna hear some good opinions hopefully. Thanks guys and let me know if you need anymore info
11-22-2008, 05:56 PM
#2
Staging Lane
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well since nobody replied lol I guess no one cares 
.
Anyway I decided to go with the second cam, new springs, new Hi-Tech 1.6 stainless steel rocker arms, Endure-X solid roller lifters, and the nylon cam button. Had to go with a small base circle and unfortunately they didn't have the 4/7 swap core to grind, so I got the regular firing order. Guy took off a good hundred bucks or so and threw in a banner lol. I guess I'll post some dyno numbers in a few months.
.Anyway I decided to go with the second cam, new springs, new Hi-Tech 1.6 stainless steel rocker arms, Endure-X solid roller lifters, and the nylon cam button. Had to go with a small base circle and unfortunately they didn't have the 4/7 swap core to grind, so I got the regular firing order. Guy took off a good hundred bucks or so and threw in a banner lol. I guess I'll post some dyno numbers in a few months.
