Pulleye.. Yes or No
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From: Chicago
Pulleye.. Yes or No Will i jsut bought my cam kit, so with it all taken apart would you recommend an ASP UDP???
I have both good and bad thing with them
What do you all think???
I have both good and bad thing with them
What do you all think???
get the powerbond and be done with it man. you'll always want those few extra hp on your dyno # and would wonder without it. you have to take it off anyway, it is def the thing to do.
my powerbond was a nice looking piece and ive had zero problems with it
my powerbond was a nice looking piece and ive had zero problems with it
The only legit reason I see for underdrive pulleys is if you are spinning the motor so high your alternator explodes or your water pump cavitates. IMO, the marginal HP they free up isn't worth the hassle or expense. I would love to see testing on an engine dyno with an ls-based motor. The only scientific testing of dampers that I have seen was on old BBC's. In that instance, the heavier dampers actually made more power because of better harmonic damping. This did however, neglect the benefit of the smaller pullies in spinning the accessories slower, which is probably where their HP increases are coming from on inertia dynos.
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From: Chicago
Originally Posted by gametech
The only legit reason I see for underdrive pulleys is if you are spinning the motor so high your alternator explodes or your water pump cavitates. IMO, the marginal HP they free up isn't worth the hassle or expense. I would love to see testing on an engine dyno with an ls-based motor. The only scientific testing of dampers that I have seen was on old BBC's. In that instance, the heavier dampers actually made more power because of better harmonic damping. This did however, neglect the benefit of the smaller pullies in spinning the accessories slower, which is probably where their HP increases are coming from on inertia dynos.
See that is my same logic.. I have no idea if it really does anything to free up power. That is $200 i can save.. Plus i hear that they give problems in the long run?
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Originally Posted by TORCHD 02 TA
See that is my same logic.. I have no idea if it really does anything to free up power. That is $200 i can save.. Plus i hear that they give problems in the long run?
and i havent suffered any problems after 10k miles at least
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From: Chicago
Originally Posted by 02NBMWS6
the power gain is 2-5 hp, nothing huge, just an every bit counts kind of thing.
and i havent suffered any problems after 10k miles at least
and i havent suffered any problems after 10k miles at least
yea so is $200 worth the 2-5 HP??
Originally Posted by TORCHD 02 TA
yea so is $200 worth the 2-5 HP??
on a budget build, no, it doesnt make sense at all
Originally Posted by gametech
The only legit reason I see for underdrive pulleys is if you are spinning the motor so high your alternator explodes or your water pump cavitates. IMO, the marginal HP they free up isn't worth the hassle or expense. I would love to see testing on an engine dyno with an ls-based motor. The only scientific testing of dampers that I have seen was on old BBC's. In that instance, the heavier dampers actually made more power because of better harmonic damping. This did however, neglect the benefit of the smaller pullies in spinning the accessories slower, which is probably where their HP increases are coming from on inertia dynos.
Originally Posted by Starz T/A 17
Ive seen dyno sheets that show around 10 RWHP.... and it doesnt "add" HP, all it does is regains HP that GM took away by adding a bigger pulley... worth it IMO
i say get one. every little bit helps.the same hp gains can be said about a p/p tb also. there will be different opinions as expected but if you gain 5 rw that's just 20 bucks a hp,i would give that anytime,anyday.
Originally Posted by Starz T/A 17
Ive seen dyno sheets that show around 10 RWHP.... and it doesnt "add" HP, all it does is regains HP that GM took away by adding a bigger pulley... worth it IMO
