Why are my dyno #'s so low?
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From: Fl/Tenn
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
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Originally posted by DanimalSVT
I have a '01 w/ 20's and they are heavy! I put down 340 RWHP & 442 RWTQ in 2nd Gear. I know '02's and '03's w/ the stock 18's that put down ~360 RWHP in 3rd gear.
If you are measuring horsepower with a roller inertia dyno (i.e. dynojet) than wheel inertia makes a difference. Horsepower is calculated by the acceleration of the drum of a know inertia. The heavier the rims the more energy required to spin them, the less of the energy goes to accelerating the dyno drum.
Hope this helps!
I have a '01 w/ 20's and they are heavy! I put down 340 RWHP & 442 RWTQ in 2nd Gear. I know '02's and '03's w/ the stock 18's that put down ~360 RWHP in 3rd gear.
If you are measuring horsepower with a roller inertia dyno (i.e. dynojet) than wheel inertia makes a difference. Horsepower is calculated by the acceleration of the drum of a know inertia. The heavier the rims the more energy required to spin them, the less of the energy goes to accelerating the dyno drum.
Hope this helps!
that is a very good point
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From: here
Originally posted by rscoleman
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
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From: Out Smokin' Unsuspecting Chevy's
Originally posted by Cali L
What was your final timing after the 4 reductions? That will help compare apples to apples with my numbers. Are those corrected numbers on a dynojet? Further apples to apples here. I'm on Cali crap fuel and got the numbers in my sig. Less timing and richer A/F than a lot that I've seen and no detonation. With all those goodies
it does seem a little low.
BD
What was your final timing after the 4 reductions? That will help compare apples to apples with my numbers. Are those corrected numbers on a dynojet? Further apples to apples here. I'm on Cali crap fuel and got the numbers in my sig. Less timing and richer A/F than a lot that I've seen and no detonation. With all those goodies
it does seem a little low.
BD
Dave
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From: Out Smokin' Unsuspecting Chevy's
Originally posted by rscoleman
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
Dave
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From: Northern, California
Originally posted by rscoleman
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
I think a motor with ported heads/aftermarket cams should be closer to 500/600, even with the stock blower. Then again, you do have to use crappy gas out there, so who knows. Do you have modmax, crower, or comp cams?
