Cog Belt Pulley system

[Avalanche]

I do not lilke RPM Outlet but here is a link to a new item that they have. I think it is a waste but check out the video on the bottom of the page. Tell me what you think.

http://www.rpmoutlet.com/lightcog.htm

[StormShadow]

I thought you wanted a little bit of slip. :confused:


Oh and that blower reminds me of the whisltle tips (BUBB RUBB AND LIL SIS)

[Avalanche]

:rll: :rll:

[StormShadow]

In case anyone forgot........ http://media.ebaumsworld.com/index.php?e=bubbrubb.wmv

[cpeapea]

people have been running cog belts on blowers for ages. my dad had many blown street rods with them. i do see inertia being hard on parts, but i figure 6 and 8-71's having more inertia than a smaller eaton would. id run a cog belt if the price wasnt so rediculous.

[FRDRCING]

I saw a post over on svtperformacne.com a while back with a lightning that had one sounded good but not for that price.

[whitelight2004]

I got the cog drive on my truck and I love it.


vid

http://www.ccstuning.com


just click on the shawn shafers cogged lightning link

[wesman]

Sweet but not worth $900 IMO.


I've got a cog setup on the 350 and it's kinda a PITA, hard to source belts and replacement parts.

--wes

[Sixpipes]

I didn't know belt slippage was an issue. Overkill IMO. :cool:

[dboat]

I didn't know belt slippage was an issue. Overkill IMO. :cool:

Dennis, I agree, I dont remember reading anywhere that belt slippage is an issue. Although it does put out a cool sound...
Dana

[WA 2 FST]

I didn't know belt slippage was an issue. Overkill IMO. :cool:

With a ribbed belt there is _always_ some belt slippage. Is it great enough to cause power loss at higher rpm? Probably not until you are really spinning the blower hard.

For a street vehicle where you are on and off the gas constantly, I think its a good thing. Otherwise, you really need some sort of race bypass valve. The stocker would not be quick enough to respond to a shut throttle condition.

I'm willing to bet a properly set up cog belt setup on our trucks (even a stocker) would net a little power...maybe 1psi of boost. Notice I said "maybe". It's really probably negligible on a milder application.

[wesman]

With a ribbed belt there is _always_ some belt slippage. Is it great enough to cause power loss at higher rpm? Probably not until you are really spinning the blower hard.

For a street vehicle where you are on and off the gas constantly, I think its a good thing. Otherwise, you really need some sort of race bypass valve. The stocker would not be quick enough to respond to a shut throttle condition.

I'm willing to bet a properly set up cog belt setup on our trucks (even a stocker) would net a little power...maybe 1psi of boost. Notice I said "maybe". It's really probably negligible on a milder application.

Correct. what I didn't mention was that the 350 has the cog system, with a blow off valve. This is crucial for boost bleed off when needed. I think it's a cool idea for the L, but it's not complete, and it's not worth $900

--wes

[BLACKSUNSHINE]

You know I like the idea and all but have you heard them. GOD their they make an irritating whine...look at the video on the RPM outlet web site.

[cpeapea]

You know I like the idea and all but have you heard them. GOD their they make an irritating whine...look at the video on the RPM outlet web site.

you gotta have a good loud exhaust to counter it out ;)

it would probably sound more wicked if you had cams too. also i wonder why this one sounds so loud compared to typical cog setups. maybe their camera made it sound louder then it really is. **** even big 8-71s arent that loud with cogs. id be a ginea pig. i wonder if you get them to fit aftermarket blowers

[Tex Arcana]

That first video won't play for me, and the second doesn't show the cog drive in action.:mad:

The cobra guys, who're overboosting alot, or running aftermarket blowers, have problems with belt slip, and can watch their boost levels fluctuating over the RPM range, so cogs can be a good solution.

The problem with straight-cut cog belts is their tendency to "walk" side-to-side on the pullies, and that's what helps tear them up (that and stretch). Goodyear has a cog belt system that uses their Gatorback pattern on the cog belts and pullies, which not only reduces noise, but also eliminates the "walking" issues, and helps control the stretch issues as well. They also supply both the belts and the pullies, so maybe that would be the way to go.

http://www.goodyearindustrialproducts.com/powertransmission/products/prod-eaglepd.html is the site, they have vids as well.

[BC Lightning]

Back from the dead :evil

Videos I found of a cogged Eaton

http://s116.photobucket.com/albums/o17/D-MRacing/DMR%20Videos/?action=view&current=DMRtest2.flv

http://s116.photobucket.com/albums/o17/D-MRacing/DMR%20Videos/?action=view&current=DMR.flv

[WA 2 FST]

Spools up real quick, no doubt.

High rpm/load decels are tough on the blower bearings though w/ cog setups.

[PoorSvtman]

yea those vids are from a guy on the harley forums that is making them... also gunna make them for the whipple and kbs...

also i have yet to see any facts that cog belts do any damage to any thing. But im sure its no more damaging than spinning the hell out of the s/c in the first place

[gbgary]

Back from the dead :evil

Videos I found of a cogged Eaton

http://s116.photobucket.com/albums/o17/D-MRacing/DMR%20Videos/?action=view&current=DMRtest2.flv

http://s116.photobucket.com/albums/o17/D-MRacing/DMR%20Videos/?action=view&current=DMR.flv


that's DblG's set-up. there are several threads rolling now on the svtp and nloc boards. his is not as expensive as the rpm outlet system.

[WA 2 FST]

also i have yet to see any facts that cog belts do any damage to any thing. But im sure its no more damaging than spinning the hell out of the s/c in the first place

I think overtightening a ribbed belt is just as damaging ... b/c crank bearings take a beating (seen it myself). To get the same "grip" a ribbed belt must be tightened more than a cogged belt setup.

However, blower acceleration rates can be greatly increased with a cog vs. a ribbed belt... how much extra wear this creates may be unknown, but it's no different than anything else. It's extra stress. But the main issues from my understanding and research have to do with decel. In theory you _want_ some belt slippage on decel. You don't get that with a cog belt.

You're "spinning the hell" out of it no matter what. The cog just allows you to do it more quickly on tip-in acceleration. Max blower speed is blower speed. You won't create any more boost with a cogged belt if you spin the blower slower than before. But on tip-in to WOT, the cogged belt allows quicker acceleration of the blower to its maximum speed (whatever that is in a given pulley combination).

I'm sure you knew all this anyway. :)

[Chris94L]

Theres a guy in Rockwall that got one of DblG's cog setups on a Harley truck. to the best of my knowledge he doesn't post here.

[dboat]

that's DblG's set-up. there are several threads rolling now on the svtp and nloc boards. his is not as expensive as the rpm outlet system.


do you have the links to those threads? might be interesting to read them..
Thanks

[gbgary]

do you have the links to those threads? might be interesting to read them..
Thanks

here are a few...

http://www.nhtoc.com/vbforum/showthread.php?t=29510

http://www.nhtoc.com/vbforum/showthread.php?t=31063

http://www.nhtoc.com/vbforum/showthread.php?t=31099

http://svtperformance.com/forums/showthread.php?t=270799&highlight=cogged

http://svtperformance.com/forums/showthread.php?t=331122

[Tex Arcana]

I think overtightening a ribbed belt is just as damaging ... b/c crank bearings take a beating (seen it myself). To get the same "grip" a ribbed belt must be tightened more than a cogged belt setup.

However, blower acceleration rates can be greatly increased with a cog vs. a ribbed belt... how much extra wear this creates may be unknown, but it's no different than anything else. It's extra stress. But the main issues from my understanding and research have to do with decel. In theory you _want_ some belt slippage on decel. You don't get that with a cog belt.

You're "spinning the hell" out of it no matter what. The cog just allows you to do it more quickly on tip-in acceleration. Max blower speed is blower speed. You won't create any more boost with a cogged belt if you spin the blower slower than before. But on tip-in to WOT, the cogged belt allows quicker acceleration of the blower to its maximum speed (whatever that is in a given pulley combination).

I'm sure you knew all this anyway. :)

I read in this month's MMFF that blower manufacturers (they were talking centri, but I think it may apply to PD as well) actually want some slip, because that helps prevent damage to the blower if the motor happens to overrev (say, bad shift that physically pushes the motor past redline).

I'd say the biggest positive for a cog system, besides the lack of slip, is that you can run a cog belt with significantly less tension than with a rib belt, which just flat saves bearings. If someone is ruining bearings or the crank snout with tension, then that person is a perfect candidate for a cog system, and they just should be careful about overrevving.

[dboat]

here are a few...

http://www.nhtoc.com/vbforum/showthread.php?t=29510

http://www.nhtoc.com/vbforum/showthread.php?t=31063

http://www.nhtoc.com/vbforum/showthread.php?t=31099

http://svtperformance.com/forums/showthread.php?t=270799&highlight=cogged

http://svtperformance.com/forums/showthread.php?t=331122


Thanks Gary,
I like the look but would prefer a non-cog system but I would like to get the full bling deal going though. :cool:
Dana

[Tex Arcana]

Thanks Gary,
I like the look but would prefer a non-cog system but I would like to get the full bling deal going though. :cool:
Dana


What's next, spinnaz?? :evil
http://img.photobucket.com/albums/v111/texarcana/SMiles/spinnaz.gif

[Silver_2000]

I read in this month's MMFF that blower manufacturers (they were talking centri, but I think it may apply to PD as well) actually want some slip, because that helps prevent damage to the blower if the motor happens to overrev (say, bad shift that physically pushes the motor past redline).

I'd say the biggest positive for a cog system, besides the lack of slip, is that you can run a cog belt with significantly less tension than with a rib belt, which just flat saves bearings. If someone is ruining bearings or the crank snout with tension, then that person is a perfect candidate for a cog system, and they just should be careful about overrevving.

I heard the same about he benefits of slip

[PoorSvtman]

What's next, spinnaz?? :evil
http://img.photobucket.com/albums/v111/texarcana/SMiles/spinnaz.gif

http://i17.photobucket.com/albums/b74/poorsvtman/Stuff/thizz-1.gif

[jcblack]

http://i17.photobucket.com/albums/b74/poorsvtman/Stuff/thizz-1.gif

I didn't know you could dance?

[PoorSvtman]

I didn't know you could dance?

Oh i can dance,:D ... but i didnt know i was that skinny lol.. im fat now

[Tex Arcana]

Oh i can dance,:D ... but i didnt know i was that skinny lol.. im fat now

Between the ears... :evil :beer:

[PoorSvtman]

Between the ears... :evil :beer:


My ears arent big. THey were when i was younger but i got fat and grew into them haha

[wesman]

My ears arent big. THey were when i was younger but i got fat and grew into them haha



Off topic some more.....

Mr. TXDOT....when the heck they gonna open up the 360 addition???

[PoorSvtman]

Off topic some more.....

Mr. TXDOT....when the heck they gonna open up the 360 addition???

Are you talking about the new section off green oaks where they just built the new bridge? I know they opened up the lanes under the bridge monday of last week. Not sure about the main lanes..

[wesman]

Are you talking about the new section off green oaks where they just built the new bridge? I know they opened up the lanes under the bridge monday of last week. Not sure about the main lanes..

Yeah...looks like it's finished...last I saw before we left for the Holidays they were hanging signs. I had heard them bragging that it was several months ahead of schedule (supposed to be done in Dec I think) back in late Sept, but haven't seen much since.


--wes

[PoorSvtman]

Yeah...looks like it's finished...last I saw before we left for the Holidays they were hanging signs. I had heard them bragging that it was several months ahead of schedule (supposed to be done in Dec I think) back in late Sept, but haven't seen much since.


--wes


Yea i was supposed to go help finish the signs that monday because they were wanting to finish the signs before opening up the lanes but i was way out near weatherford almost fixing a exit sign. All the bridge work is contracted and i also heard it was ahead of schedule as well. I dont pay much attention to contracter work or the road crew that we do. I just drive around all day and hang signs, drill holes for sign bases in my bobcat or pour cement for the bases...