which is it?
which is it? Correct me if Im wrong here, but I emailed march performance asking them if the alternator pulley included in their kit was overdrive, or underdrive or stock size. They couldnt give me a straight answer, so I asked them what belts were suggest for either just the crank pulley, or the crank WITH alternator pulley, and this is the answer I got.
4521 balancer only: use Dayco 5060760 alt.; 5040378 A.C.
4505 power and amp kit: Dayco 5060755 alt.; 5040378 A.C.
So as I was saying, correct me if Im wrong, but from what I understood the last two numbers in a belts part number is the size. So would I be accurate in my assumption then that the alternator pulley is underdriven because the belt suggested for the crank with alt pulley is a 55, whereas the belt suggested for just the crank and factory alt pulley is a 60.
It is pretty late, so maybe Im just burnt out, lol. Let me know
4521 balancer only: use Dayco 5060760 alt.; 5040378 A.C.
4505 power and amp kit: Dayco 5060755 alt.; 5040378 A.C.
So as I was saying, correct me if Im wrong, but from what I understood the last two numbers in a belts part number is the size. So would I be accurate in my assumption then that the alternator pulley is underdriven because the belt suggested for the crank with alt pulley is a 55, whereas the belt suggested for just the crank and factory alt pulley is a 60.
It is pretty late, so maybe Im just burnt out, lol. Let me know
Where are you getting these numbers from, and what are you trying to get? Which pulley(s) do you want?
March only sells an underdrive crank pulley. Overdrive would be pointless, as would stock.
March only sells an underdrive crank pulley. Overdrive would be pointless, as would stock.
TheBlurLS1
He said alternator pulley. Which they do sell.
http://www.thunderracing.com/catalog...1&sid=343#P432
He said alternator pulley. Which they do sell.
http://www.thunderracing.com/catalog...1&sid=343#P432
Originally Posted by TheBlurLS1
Where are you getting these numbers from, and what are you trying to get? Which pulley(s) do you want?
March only sells an underdrive crank pulley. Overdrive would be pointless, as would stock.
March only sells an underdrive crank pulley. Overdrive would be pointless, as would stock.
But the guys at march werent able to clearly tell me if their alt pulley included in their kits were over or under.
and I got those numbers emailed to me directly FROM March.
From: marchperf@aol.com
Subject: Re: question
so nobody on here actually bought the kit with the alt pulley, and can tell if its larger or smaller than the original? Guess I'll find out myself in a week or so and let ya'll know.
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I am not seeing this kit for an f-body on thunder's site. Where exactly did you find it?
It did not seem to show the underdrive alternator pulley anywhere on there for an f-body.
It did not seem to show the underdrive alternator pulley anywhere on there for an f-body.
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I havent called Thunder, cause exactly, they dont carry it.
However, as stated above, I did call March themselves and I couldnt get a straight answer outta the guy.
http://www.marchperf.com/pg1.html right at the bottom #4505
Part #4505 Camaro/Firbird dampener crank pulley and power and amp alt pulley.
I havent called Thunder, cause exactly, they dont carry it.
However, as stated above, I did call March themselves and I couldnt get a straight answer outta the guy.
http://www.marchperf.com/pg1.html right at the bottom #4505
Part #4505 Camaro/Firbird dampener crank pulley and power and amp alt pulley.
AHA! Summit sells them aswell, and as usual, nobody there can really tell me if its underdriven or overdriven, but from the picture if its of the actual product.... it looks pretty underdriven for an alt pulley maybe?
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
