going to buy underdrive pulley.which one?
TECH Fanatic
Joined: Oct 2003
Posts: 1,839
Likes: 0
72 sub you shouldn't speak about things you don't know.
Most pulleys don't show up on a dyno, some people get a couple hp at most.
I think this is because a dyno in 1:1 gear spins the motor much slower.
I bet you'd see better gains in 1-2-3 gears.
But the pulley proves its worth on the track. Always 1 mph faster on a consistent car.
Most pulleys don't show up on a dyno, some people get a couple hp at most.
I think this is because a dyno in 1:1 gear spins the motor much slower.
I bet you'd see better gains in 1-2-3 gears.
But the pulley proves its worth on the track. Always 1 mph faster on a consistent car.
Launching!
Joined: Jul 2003
Posts: 270
Likes: 0
From: Baton Rouge, LA
Hold on there Z98. I said nothing about a pulley's worth on the dyno. I simply stated that a change in the rate at which an engine changes RPM will indeed show up on the dyno. I was just correcting the notion expressed by SidewayzOZ that a dyno doesn't reflect an engine spinning up faster and thereby fulfilling an impulse I had to be an arrogant bastard as I'm a stickler (*******) for details.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
The weight of the pulley has super minimal effect on the crank because the mass is in centrifugal motion.
The march with it's fluid dampening characteristic does what it is designed to do and controls the harmonics of the modded engine.
Harmonic control has to be done at both ends of the motor and that requires a well balanced flywheel/flexplate.
All pulleys with the same underdrive ratio, ie 25% will produce the same gain.
March will also not set false KR which has been plaguing ASP's to the point that they had to redesign it.
If you choose an ASP make sure you get the latest version.
Personally I'm going with March with H/C swap.
The march with it's fluid dampening characteristic does what it is designed to do and controls the harmonics of the modded engine.
Harmonic control has to be done at both ends of the motor and that requires a well balanced flywheel/flexplate.
All pulleys with the same underdrive ratio, ie 25% will produce the same gain.
March will also not set false KR which has been plaguing ASP's to the point that they had to redesign it.
If you choose an ASP make sure you get the latest version.
Personally I'm going with March with H/C swap.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
12 Second Club
Joined: Jul 2003
Posts: 3,371
Likes: 0
From: Atlanta
I've heard they go from 320 on GP to 36x .
I helped Stalker WS6 install his March a couple of weeks ago. Very nice piece & with it being a fluid dampner as stated above it won't cause KR. We also installed it with the dampner installation tool that they sell in the tool section. Very good working tool, simple and it did it's job nicely.
Originally Posted by PREDATOR-Z
The weight of the pulley has super minimal effect on the crank because the mass is in centrifugal motion.
The march with it's fluid dampening characteristic does what it is designed to do and controls the harmonics of the modded engine.
Harmonic control has to be done at both ends of the motor and that requires a well balanced flywheel/flexplate.
All pulleys with the same underdrive ratio, ie 25% will produce the same gain.
March will also not set false KR which has been plaguing ASP's to the point that they had to redesign it.
If you choose an ASP make sure you get the latest version.
Personally I'm going with March with H/C swap.
The march with it's fluid dampening characteristic does what it is designed to do and controls the harmonics of the modded engine.
Harmonic control has to be done at both ends of the motor and that requires a well balanced flywheel/flexplate.
All pulleys with the same underdrive ratio, ie 25% will produce the same gain.
March will also not set false KR which has been plaguing ASP's to the point that they had to redesign it.
If you choose an ASP make sure you get the latest version.
Personally I'm going with March with H/C swap.
i know SLP and i think whisper had this problem.ive never heard about ASP pullies causing KR.
