07-10-2015, 05:16 PM | #1 |
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Join Date: Jun 2012
Location: magna, Utah
Posts: 12
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New cam?
Im currently running lunati vodoo cam in a 355 with vortec heads, flattop pistons. Current cam specs are.
Basic Operating RPM Range: 1,000-5,500 Intake Duration at 050 inch Lift: 213 Exhaust Duration at 050 inch Lift: 219 Duration at 050 inch Lift: 213 int./219 exh. Advertised Intake Duration: 256 Advertised Exhaust Duration: 262 Advertised Duration: 256 int./262 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.454 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.468 in. Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.468 exh. Lobe Separation (degrees): 112 Im wanting more power and my question is how much HP will i gain from switching to one of these cams. Note my heads already have new springs to support a bigger lift. Basic Operating RPM Range: 1,400-5,700 Intake Duration at 050 inch Lift: 219 Exhaust Duration at 050 inch Lift: 227 Duration at 050 inch Lift: 219 int./227 exh. Advertised Intake Duration: 262 Advertised Exhaust Duration: 268 Advertised Duration: 262 int./268 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.468 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.489 in. Valve Lift with Factory Rocker Arm Ratio: 0.468 int./0.489 exh. or this cam Basic Operating RPM Range: 1,800-6,000 Intake Duration at 050 inch Lift: 230 Exhaust Duration at 050 inch Lift: 236 Duration at 050 inch Lift: 230 int./236 exh. Advertised Intake Duration: 274 Advertised Exhaust Duration: 286 Advertised Duration: 274 int./286 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.490 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.490 in. Valve Lift with Factory Rocker Arm Ratio: 0.490 int./0.490 exh. Lobe Separation (degrees): 110 or this Basic Operating RPM Range: 1,800-6,200 Intake Duration at 050 inch Lift: 227 Exhaust Duration at 050 inch Lift: 233 Duration at 050 inch Lift: 227 int./233 exh. Advertised Intake Duration: 268 Advertised Exhaust Duration: 276 Advertised Duration: 268 int./276 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.489 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.504 in. Valve Lift with Factory Rocker Arm Ratio: 0.489 int./0.504 exh. Lobe Separation (degrees): 110 |
07-10-2015, 06:01 PM | #2 |
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Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: New cam?
You'll turn your truck into a slug. Look at those rpm ranges. As those go up, torque at low rpm goes down. Horsepower is all fine and dandy on the track, but on the street you drive torque.
All of those cams will feel weaker for a street truck than what you are running now.
__________________
Rich Weyand 1978 K10 RCSB DD. |
07-10-2015, 08:11 PM | #3 |
Registered User
Join Date: Aug 2005
Location: Louisiana
Posts: 711
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Re: New cam?
Rich is spot on, the bigger cams will make more HP but, at a higher rpm. What you gain up top, you lose at the lower end, where you spend most of your time on the street.
What you really want is more cubes. |
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