8 rib vs 10 rib
Apr 15, 2009 | 09:41 PM
#11
The Metco Idlers wont handle the load and will begin to high speed wobble.
Apr 15, 2009 | 09:42 PM
#12
Inovators makes a non shouldered idler and it is also larger in dia.
Apr 15, 2009 | 09:46 PM
#13
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Originally Posted by Metco
This billet idler pulley is specifically designed for severe-duty applications, such as those running higher boost levels or aftermarket superchargers like a Whipple or a Kenne-Bell.
The pulley is machined to accept twin bearings to provide added stability and the ability to withstand excessive belt loads. The pulley is hard-coat anodized in black and includes a separate bearing dust cover and stainless steel fastener.
This pulley can be installed as a direct replacement for an OEM idler pulley or anywhere a standard Metco Motorsports idler pulley can be installed. Also available in 90mm diameter - see the Metco Motorsports MIPDBR90 listed elsewhere in this section.
Important Note: As of 7.1.2008, the Metco Motorsports double-bearing idler pulleys have been revised to add compatibility with 10-rib drive systems. The pulleys are wider and have an updated machined design, but maintain compatibility with standard 8-rib drive systems (Cobra & Lightning). The picture shown is of the newest design.
The pulley is machined to accept twin bearings to provide added stability and the ability to withstand excessive belt loads. The pulley is hard-coat anodized in black and includes a separate bearing dust cover and stainless steel fastener.
This pulley can be installed as a direct replacement for an OEM idler pulley or anywhere a standard Metco Motorsports idler pulley can be installed. Also available in 90mm diameter - see the Metco Motorsports MIPDBR90 listed elsewhere in this section.
Important Note: As of 7.1.2008, the Metco Motorsports double-bearing idler pulleys have been revised to add compatibility with 10-rib drive systems. The pulleys are wider and have an updated machined design, but maintain compatibility with standard 8-rib drive systems (Cobra & Lightning). The picture shown is of the newest design.
Anyway, it's sounding like I might be better off sending this ATI kit back and ordering the IW 8 rib instead. 14 psi on Hank's 427ci motor has to be equivalent to 15-16 on a 403, no?
Apr 15, 2009 | 09:50 PM
#14
We found around a 2 psi difference between my 370 and the 427 of Ray's.
Apr 16, 2009 | 10:25 AM
#16
Has anybody asked Innovator's if they would carve a 10rib? I agree that belt selection on 10-rib could make life a diffifcult for awhile sourcing the right one. Brian posted one up... there have got to be more. Get ahold of Dayco, Goodyear, whoeever makes belts and start asking questions. Someone will need to lay the ground work for 10rib... as in find the belts in different sizes and work with vendors to supply quality pulley/idlers, etc. Personally, if it were me I would not worry about 2% underdrive on the ATI HB... maybe that means talking to some alternator folks and get more info at what aftermarket can provide as far as idle power. What worrries me the most on 10rib is the side load of the pulley as you are extending out the center of the belt from the bearing... speaking specifically regarding alternator and power steering. I could be wrong I'm just throwing it out there as a premautre wear failure possibility.
8-rib has certainly proven itself... no doubt... and more belt choices. I don't know Chris. If you are not in a hurry then be that guy that perfects the 10rib for trucks
Bill
8-rib has certainly proven itself... no doubt... and more belt choices. I don't know Chris. If you are not in a hurry then be that guy that perfects the 10rib for trucks
Bill
Apr 16, 2009 | 10:39 AM
#17
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Has anybody asked Innovator's if they would carve a 10rib? I agree that belt selection on 10-rib could make life a diffifcult for awhile sourcing the right one. Brian posted one up... there have got to be more. Get ahold of Dayco, Goodyear, whoeever makes belts and start asking questions. Someone will need to lay the ground work for 10rib... as in find the belts in different sizes and work with vendors to supply quality pulley/idlers, etc. Personally, if it were me I would not worry about 2% underdrive on the ATI HB... maybe that means talking to some alternator folks and get more info at what aftermarket can provide as far as idle power. What worrries me the most on 10rib is the side load of the pulley as you are extending out the center of the belt from the bearing... speaking specifically regarding alternator and power steering. I could be wrong I'm just throwing it out there as a premautre wear failure possibility.
8-rib has certainly proven itself... no doubt... and more belt choices. I don't know Chris. If you are not in a hurry then be that guy that perfects the 10rib for trucks
Bill
8-rib has certainly proven itself... no doubt... and more belt choices. I don't know Chris. If you are not in a hurry then be that guy that perfects the 10rib for trucks
Bill
Belt selection is going to be the issue now. Brian had that one part number listed above, but I searched Gates and Goodyear and could not find it listed in their catalog. Maybe I do need to call and see what's available.
One thought I had though, is that if I did do the 10 rib setup I can always run an 8 rib belt on it until I find a good source for 10 rib belts....
Last edited by thunder550; Apr 16, 2009 at 10:53 AM.
Apr 16, 2009 | 11:35 AM
#20
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I spoke with IW on the phone a little bit ago. They are willing to take their overdrive 8 rib setup and make me a 10 rib setup in the same configuration. Cost is not significantly more. It's looking like I might go ahead and do that...need to arrange for the return of my ATI kit first, before I get stuck with 2 sets of pulleys....