View Full Version : 8 rib pulley?
Anyone know where you can get an 8 rib crank pulley for the 4.3 in the stock size or even a shade larger? 928 motorsports sells the 8 ribs for the chargers but I haven't been able to find anyone that shows they offer an 8 rib crank pulley for anything but a mustang.
Wonder what it would cost to get one made? Probably an arm & a leg. I have found some for the lt1 and ls1. It's hard to believe that nobody with something other than a lt1 or ls1 haven't put a demand out for it. I guess that's what makes us unique. We don't fit the norm.
I know a few looked around and found a couple of places that would fab one, but the cost was a bit much.
We own what is considered to be a budget truck with a budget motor. The lack of off the shelf goodies is reflected by lack of potential revenue.
An 8 rib would really be nice.
I never researched if one for a v8 would work properly.
The pulleys are the same size as the 5.7 found in the pick ups with a full serpentine set up. That's why I can't beleive that there isn't a thing out there.
E-mailed ASP Racing to see if they could make one & to give me a price if they can. They make 8 ribs for the stangs and they make under drive pulleys for pretty much everything. Hopefully they don't take forever to get back to me.
rentedmule
01-15-10, 01:10 PM
They can make them, I priced them a long time ago. 98SS actually had a complete set made for his truck. IIRC it was something like $275 for an aluminum 8-rib crank pulley.
rentedmule
01-15-10, 01:51 PM
I can't log into my email account right now but this is what I posted in his thread a while back.
http://www.s10planet.com/forum/showpost.php?p=196510&postcount=16
I was to going to have the outer crank pulley made in 8 rib and then swap to wider idlers just to run the blower on 8-rib.
Wow, that's a lot for the crank pulley. I was hoping it would be a little less than that. At that price it'll be around $4-500 to do the whole thing with other pulleys and belt. If it goes that high I may have to wait a while to save up some more cash.
rentedmule
01-15-10, 03:10 PM
That's for a custom made pulley so it's going to be a bit pricey. When you consider that a small aluminum headunit pulley costs $100 it seems like a pretty good deal though! I don't think it'd be worth it on a powerdyne unless you could make it live at high boost levels.
Here are some other ideas to reduce belt slip that are probably cheaper - I was going to try something like this before I decided to sell mine
http://www.s10planet.com/forum/showpost.php?p=215981&postcount=137
That's an idea I never thought of. might have to look at that when i start to put mine back together. In truth I don't care for the adjuster set up for the powerdyne on the s10. It's on the wrong side in my opinion and doesn't do a very good job. But I need to take care of the belt slip. 928 Motorsports says thats what causes the internal belt to go. But I hate putting so much pressure on the bearings. Just asking for failure in my opinion.
rentedmule
01-15-10, 04:31 PM
I also wanted to do that because I was getting a vibration from the drive belt - it was flapping back and forth a bit on that long run down to the crank pulley. Drove me nuts for a long time before I figured out it was coming from the belt. I'm sure I roasted my headunit at least once from over tightening the belt.
FWIW I think 928 does a bit of embellishing about the quality/gains to be had from their upgrade parts. Hind-sight is 20/20 and if I had to do it over again I would have traded the BD11a in to superchargerrebuilds.com for a refurbished XB1a before I ever spent a dime upgrading it (I spent a lot of dimes on it).
I hear ya. I've spent more than I'd like to have also. if I had it to do over again I would have gone with probably a Vortec or something else.
When I started I was looking at cost & ease of installation too much. Like you said, hind sight is 20/20.
firefighter
01-15-10, 06:23 PM
What are you looking to do? Run a wider belt or how about a seperate belt for the charger? Wipple used to have a spacer that made it so you could piggy back two crank pulleys and run a seperate belt for the charger. It was little more than plate steel with the appropriate holes and diameter.
What are you looking to do? Run a wider belt or how about a seperate belt for the charger? Wipple used to have a spacer that made it so you could piggy back two crank pulleys and run a seperate belt for the charger. It was little more than plate steel with the appropriate holes and diameter.
A Powerdyne does run off its own belt. Would like to run a wider belt for better traction for less slippage.
I still think a "Pete Jackson" gear setup would a fair replacement for the internal belt.
What's a "Pete Jackson" gear set up.
Timing gears for smallblocks. Look like this
http://www.jegs.com/images/photos/782geardrive.gif
Of course you'd be lookin for a way to lube it, which wouldn't be difficult.
I wonder if nylon, or another light but strong, material for gears could be conjured up and made to work.
I wouldn't use nylon gears. They used to cover the cam gears on the old 318's. The nylon would wear off and there went the timing chain. ThE fiber gears that were on the cams in the old 2.5 would work. But I'm sure for the cost to do this you could get a xb unit.
Well, got an answer back from ASP. Here's what they said.
"Yes we can modify your stock dampner for 250.00 or purchase a new one to rework. Price would be 250.00 plus dampner. The size would go up to a 8 in though do to the process not allowing us to stay at 7.5. "
I think It'll have to wait a while. All the money I have saved up now is going toward the motor rebuild.
rentedmule
01-18-10, 10:24 PM
I don't understand what you asked them - why would you modify your dampener? Just replace the second stacked crank pulley with an 8-rib instead of a 6-rib and get 8-rib headunit and idler pulleys.
I don't understand what you asked them - why would you modify your dampener? Just replace the second stacked crank pulley with an 8-rib instead of a 6-rib and get 8-rib headunit and idler pulleys.
I did ask them about a pulley. And finding an 8 rib crank pulley for our 4.3 or the older 350 is the problem. That's why I e-mailed them to ask if they could make one since they make underdrive pulleys for the 4.3. Not sure why they said dampener. Unless they are thinking of an lt1.
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