5.3 228 cam peaking aroun 6200 rpm?
10-09-2012, 12:09 PM
#1
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5.3 228 cam peaking aroun 6200 rpm? greetings
My car is: fox mustang
5.3 form 2008 silverado
2500 precision stall
1 3/4 headers
2 1/2 exhaust X pipe, magnaflows
truck intake
243 heads milled .050 to get 11:1 compression
A friend got a regrind he never used it only says 228 intake 230 exhaust 114
.500 lift on both, I plan to use it on a 150 wet shot
since we are at 5200 ft elevation I feel 298 hp on locked converter seems fine, but power is peaking at 6200 rpm and keeps to 6400 ( 25 hp lower). So I need a cam with .550 lift or more duration to keep HP up to 6500 rpm ? or a ls6 intake will extend my powerband?
Thanks for your help
My car is: fox mustang
5.3 form 2008 silverado
2500 precision stall
1 3/4 headers
2 1/2 exhaust X pipe, magnaflows
truck intake
243 heads milled .050 to get 11:1 compression
A friend got a regrind he never used it only says 228 intake 230 exhaust 114
.500 lift on both, I plan to use it on a 150 wet shot
since we are at 5200 ft elevation I feel 298 hp on locked converter seems fine, but power is peaking at 6200 rpm and keeps to 6400 ( 25 hp lower). So I need a cam with .550 lift or more duration to keep HP up to 6500 rpm ? or a ls6 intake will extend my powerband?
Thanks for your help
10-09-2012, 12:14 PM
#2
More duration will make the power carry higher in the powerband better, assuming you still have valvetrain control.
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COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
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POWERBOND - ASP - AND MORE!
10-09-2012, 04:18 PM
#3
A ls6 intake will help with the top end, but I'd consider at least getting a low mileage used cam that's not a re-grind around the same size so you'll make better power and actually know what you have. IMO. a 228/230 114lsa should peak higher than 6200.
10-10-2012, 11:00 AM
#6
Ding ding ding.
Lift has NO bearing on peak rpm.
Your truck intake and the size of the 243 heads intake runner and intake valve does.
You could force the motor to peak at a higher rpm with that intake, but for one...it'd take a much bigger cam than what you have now, and for two it would so inefficient it'd fall flat on it's face after it peaked.
Lift has NO bearing on peak rpm.
Your truck intake and the size of the 243 heads intake runner and intake valve does.
You could force the motor to peak at a higher rpm with that intake, but for one...it'd take a much bigger cam than what you have now, and for two it would so inefficient it'd fall flat on it's face after it peaked.
10-10-2012, 12:06 PM
#7
That cam seems a little large for a 5.3, especially since you only have stock heads. 243 heads stock usually fall off after 550 lift...
Also are you sure about that cam being only 500 lift? That is a stock cam type lift number...also by you saying it is done making power at 6200rpm sounds like it might be a stock cam...at least those foxes are nice and light so you don't need tons of power to be fast
Also are you sure about that cam being only 500 lift? That is a stock cam type lift number...also by you saying it is done making power at 6200rpm sounds like it might be a stock cam...at least those foxes are nice and light so you don't need tons of power to be fast
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10-10-2012, 04:43 PM
#8
That cam seems a little large for a 5.3, especially since you only have stock heads. 243 heads stock usually fall off after 550 lift...
Also are you sure about that cam being only 500 lift? That is a stock cam type lift number...also by you saying it is done making power at 6200rpm sounds like it might be a stock cam...at least those foxes are nice and light so you don't need tons of power to be fast
Also are you sure about that cam being only 500 lift? That is a stock cam type lift number...also by you saying it is done making power at 6200rpm sounds like it might be a stock cam...at least those foxes are nice and light so you don't need tons of power to be fast
Now what they carry too is a different story, but they peak much sooner than 6200rpm.
