23% under drive pully
04-08-2009, 01:27 PM
#1
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23% under drive pully Sorry for all the threads but im trying to pick up some more bolt on's. how much of a noticeable difference would this make?
04-08-2009, 05:57 PM
#4
i couldnt tell you mine still is up in the air. But i can tell you you will want to get the bigger alt pully as well. If you dont with the smaller crank pully you will overclock your alt and make it produce more amp's. Causing to over charge the bat or burn up the alt.
04-08-2009, 06:44 PM
#6
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04-08-2009, 07:31 PM
#8
i couldnt tell you mine still is up in the air. But i can tell you you will want to get the bigger alt pully as well. If you dont with the smaller crank pully you will overclock your alt and make it produce more amp's. Causing to over charge the bat or burn up the alt.
04-08-2009, 11:00 PM
#10
for a more reliable install an alternator pulley is recommended. but i have a pretty tiny pulley on mine without an alternator pulley and its been working great for at least 6 months (i forget when i put it on) LT1s come with a huge alternator. i wouldnt bother with the second pulley unless i started having problems later
i put buses on a exhaust only 04 cobra from a dig 
04-13-2009, 12:29 PM
#16
23% works great in a cammed car since idle is usually already raised a little.
With a stock idle, that much underdrive often required an overdrive Alt pulley.
I had one on my LE H/C 350 LT1
It really did improve throttle response. It's much lighter than the stock pulley.
I picked it up used at a good price, so no complaints.
Once thing to note is that it wasn't perfectly neutral from the factory, I had a local shop fix that for me for $20.
I run a 10% underdrive ATI harmonic balancer on my 383 to handle the RPM.
Same deal there, much lighter than stock.
With a stock idle, that much underdrive often required an overdrive Alt pulley.
I had one on my LE H/C 350 LT1
It really did improve throttle response. It's much lighter than the stock pulley.
I picked it up used at a good price, so no complaints.
Once thing to note is that it wasn't perfectly neutral from the factory, I had a local shop fix that for me for $20.
I run a 10% underdrive ATI harmonic balancer on my 383 to handle the RPM.
Same deal there, much lighter than stock.
LMAO funny guy here 
04-13-2009, 02:03 PM
#20