overdriven crank pullies ?
Thread Starter
Melting Slicks
Joined: Jun 2001
Posts: 2,340
Likes: 2
From: Moro IL
overdriven crank pullies ?
Sorry guys, new to the FI world, so this might be a stupid question. I did a search on these and came up with mostly availability and how to pin them. Wondering the advantages and disadvantages of these, along with what modifications are needed to install one?
Thanks
Pat Kunz
Thanks
Pat Kunz
Le Mans Master
Joined: Feb 2007
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From: Mt Pleasant, TN
Advantage is more boost, more belt wrap around the crank pulley were most best slip occurs, if you dont want to up the boost you can run a larger top pulley for again more belt wrap. Not really any disadvantages that I can think of. To install it the steering rack need to be removed or slid to the side, then just remove the bolt and pulley and put the new pulley on, pin it, torque the new bolt down to spec and then put the rack back in.
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We have them in stock if necessary, along with crank pinning kits. 
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Melting Slicks
Joined: Jul 2007
Posts: 2,939
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From: Simpsonville SC
St. Jude Donor '09-'10
I had the Innovator's West 10% Overdrive balancer installed on my car. it is a piece of work!
Off with the old:
On with the new!
Off with the old:
On with the new!
Last edited by clif; Jan 29, 2010 at 09:09 AM.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
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From: Forney Texas
Don't know why nobody answered your question yet, but the advantage is this. First you must know that a smaller blower pulley is more susceptible to slipping on the belt due to less surface area. If you decide you want more boost, the other option is to get an overdrive pulley. The advantage is you can keep your upper pulley larger and also gain surface area on the crank side, which is the other end prone to slippage. Another advantage is that you will increase the speed of your water pump and alternator. The vehicle voltage will stay up when you come to a stop light. I too have the Innovators West O.D. pulley. A&A sells it for a great price.
They do have key slots broached in them for aftermarket cranks. For the stock crank, you can pin it.
They do have key slots broached in them for aftermarket cranks. For the stock crank, you can pin it.
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Don't know why nobody answered your question yet, but the advantage is this. First you must know that a smaller blower pulley is more susceptible to slipping on the belt due to less surface area. If you decide you want more boost, the other option is to get an overdrive pulley. The advantage is you can keep your upper pulley larger and also gain surface area on the crank side, which is the other end prone to slippage. Another advantage is that you will increase the speed of your water pump and alternator. The vehicle voltage will stay up when you come to a stop light. I too have the Innovators West O.D. pulley. A&A sells it for a great price.
They do have key slots broached in them for aftermarket cranks. For the stock crank, you can pin it.
They do have key slots broached in them for aftermarket cranks. For the stock crank, you can pin it.
Drifting
Joined: Apr 2008
Posts: 1,840
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From: halton region Ontario
A flip drive will solve the potential slippage issue and allow you to use 2 belts without a strain on your accessory units like a real tight single belt.
Both overdrive balancer and flip drive is even better.
Decisions, decisions...$ & $.
Both overdrive balancer and flip drive is even better.
Decisions, decisions...$ & $.
Burning Brakes
Joined: Nov 2006
Posts: 892
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From: Pittsburgh PA
ECS, it says on your site that the crank pulley works on both 6 and 8 rib applications, would there be any issues running it on a 6 rib setup with no wall to support the belt and allow it to ride up on to other ribs?
I only ask because I will be going 8 rib eventually and wouldn't mind doing this while I have the car apart in the front.
I only ask because I will be going 8 rib eventually and wouldn't mind doing this while I have the car apart in the front.
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Tech Contributor
Joined: Apr 2007
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From: Forney Texas
ECS, it says on your site that the crank pulley works on both 6 and 8 rib applications, would there be any issues running it on a 6 rib setup with no wall to support the belt and allow it to ride up on to other ribs?
I only ask because I will be going 8 rib eventually and wouldn't mind doing this while I have the car apart in the front.
I only ask because I will be going 8 rib eventually and wouldn't mind doing this while I have the car apart in the front.
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
I just see how easy it is for the belt to start riding on setups and feel though it may still be able to ride on the balancer and move from rib to rib due to their being no wall on one side of the belt.
I am also running the flip drive, maybe I won't even need the balancer we will see.
I am also running the flip drive, maybe I won't even need the balancer we will see.
Thread Starter
Melting Slicks
Joined: Jun 2001
Posts: 2,340
Likes: 2
From: Moro IL
Don't know why nobody answered your question yet, but the advantage is this. First you must know that a smaller blower pulley is more susceptible to slipping on the belt due to less surface area. If you decide you want more boost, the other option is to get an overdrive pulley. The advantage is you can keep your upper pulley larger and also gain surface area on the crank side, which is the other end prone to slippage. Another advantage is that you will increase the speed of your water pump and alternator. The vehicle voltage will stay up when you come to a stop light. I too have the Innovators West O.D. pulley. A&A sells it for a great price.
They do have key slots broached in them for aftermarket cranks. For the stock crank, you can pin it.
They do have key slots broached in them for aftermarket cranks. For the stock crank, you can pin it.
Great post
OK makes perfect sense to me now. Thanks guys for your responses. So many ways to increase power in these things. Pat Kunz
