Underdrive pulley question gen 3 & 4

**Getnlwr** · 03-10-2014

Originally Posted by JTS VENOM PERFORMANCE

guys any questions you have just call anytime, we use the best of what we can get, we have two different pulleys, one is a two parter, that fits oem and ati dampners, then we have the one piece, that is lower priced

at the time of producing, we did not look at the gen IV's, I will gladly make any changes to the belts or bolts if anyone needs, We will do or help with whatever is needed, we do plan on bringin back our entire pulley line

I will contact the VOA soon about sponsorship, I have just been too busy lately and missed the initial sponsorship, my apologies, but any questions , needs , please feel free to give me a shout

Hey Tony,

Offering a different set of bolts for the Gen4 cars is all that is needed. I'm looking into getting some custom ones made by turning down other bolts to create a proper shoulder bolt that will fill the seemingly excessive large holes on the pulleys. I hate automotive grade parts fitment. I'll be trying to get it a little more precise like aero grade.

**JTS VENOM PERFORMANCE** · 03-10-2014

how are you sir, you have my address, if you ship or send me the size or an oem bolt, we can gladly make the changes, and if the belt is a different size, I can change that also
be glad to

**FLATOUT** · 03-10-2014

On the Mopar unit the factory bolts reinstalled with no issues. I need to try them on the JTS unit but I suspect they'll work just fine until we can figure out the grade 8 replacement to go in the kits.

Originally Posted by Getnlwr

Hey Tony,

Offering a different set of bolts for the Gen4 cars is all that is needed. I'm looking into getting some custom ones made by turning down other bolts to create a proper shoulder bolt that will fill the seemingly excessive large holes on the pulleys. I hate automotive grade parts fitment. I'll be trying to get it a little more precise like aero grade.

**JTS VENOM PERFORMANCE** · 03-10-2014

yessir, just let me know and we can make the change sir

**IndyRon** · 03-10-2014

I received my UD pulley from IPSCO and he asked Gen 3 or 4 and sent me the respective hardware necessary. I haven't installed it yet but will post up when I do.

**Getnlwr** · 03-10-2014

Andy, I am referring to the diameter of the hole in the part being sloppy in comparison to the bolt itself Best way I can describe it is a 8mm bolt fitting into a 9.5mm hole. Maybe its just the one brand of pulley. I don't like sloppy fitment. I may be able to make a sleeve spacer out of some thin wall 8mm ID stainless or al tubing, and that will be an easy fix for me.

Tony, As noted above the OEM belt fit fairly well with the UD pulley. The shipped belts seem to be about a 2" shorter and will not fit. The OEM -1" would be good. Hope all is well with you in the SRT10 RAM world. There are many days I am missing mine. I got to put an underdrive pulley on it for the new owner about 3 weeks ago. Pretty sure he got it and a throttle body from you.

Getnlwr
Andy

Bolt idea:
Shorter shank, but note how its swollen near the head of the bolt:
4469757-OE.jpg

Or a double stud with lock nuts would work like this. Image wouldn't copy. Please check link
https://www.belmetric.com/s8x10x35-m...835&cPath=9_73

**FLATOUT** · 03-10-2014

Interesting, the Mopar under drive has the same size holes as the factory pulley, guess that's why I didn't notice it.

And yes, just reuse your stock belt (people doing this mod) it works just fine with no belt slip.

Originally Posted by Getnlwr

Andy, I am referring to the diameter of the hole in the part being sloppy in comparison to the bolt itself Best way I can describe it is a 8mm bolt fitting into a 9.5mm hole. Maybe its just the one brand of pulley. I don't like sloppy fitment. I may be able to make a sleeve spacer out of some thin wall 8mm ID stainless or al tubing, and that will be an easy fix for me.

Tony, As noted above the OEM belt fit fairly well with the UD pulley. The shipped belts seem to be about a 2" shorter and will not fit. The OEM -1" would be good. Hope all is well with you in the SRT10 RAM world. There are many days I am missing mine. I got to put an underdrive pulley on it for the new owner about 3 weeks ago. Pretty sure he got it and a throttle body from you.

Getnlwr
Andy

**JTS VENOM PERFORMANCE** · 03-10-2014

do this flat out or gtnlowr either one , let me know what the diameter on the IV is , we can easily make that change, and I can do that on the belt as well, if the oem belt works the only thing I worry about, is that if it gets wet it may slip a touch, if the tensionor is maxed out, or gtnlwr if you have one of ours, I can check on making the change either way sir, btw , the ram world is good here at the new shop, but we seem to be getting outnumbered by the vipers a good bit here lately. they seem to be taking up a bit more space then the trucks

**Getnlwr** · 03-10-2014

The Gen 4 Bolt size for the stock pulley appears to be 8mmX1.25 by 30mm. The pulley being thicker than the stock steel one should need a longer bolt. Perhaps a 35mm length.

There is no shank area on the oem bolt, if a bolt could be found with a un-threaded shank 5mm long and the shank width about .005" to .001" (yes I realize I gave that in SAE not metric )under sized from what the pulley hole diameter is. - My brain thinks in SAE to the .000 point, as that's what I am used to at work. The other option would be to have the CNC maker of the pulley reduce the size of the holes by a small margin. (easiest fix) Maybe I'm just over thinking this.

**JTS VENOM PERFORMANCE** · 03-13-2014

Originally Posted by Getnlwr

The Gen 4 Bolt size for the stock pulley appears to be 8mmX1.25 by 30mm. The pulley being thicker than the stock steel one should need a longer bolt. Perhaps a 35mm length.

There is no shank area on the oem bolt, if a bolt could be found with a un-threaded shank 5mm long and the shank width about .005" to .001" (yes I realize I gave that in SAE not metric )under sized from what the pulley hole diameter is. - My brain thinks in SAE to the .000 point, as that's what I am used to at work. The other option would be to have the CNC maker of the pulley reduce the size of the holes by a small margin. (easiest fix) Maybe I'm just over thinking this.

I will get to work on that sir