Whiners
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From: Farmington, MO
Originally Posted by KBELL
Sorry but we don't recommend cog drives. It voids the warranty! Please don't use the cog systems. There is no slippage with the stock belt except where it is necessary at the shifts.
It's why Ford and GM use "clutch" alternators. Here's a simple analogy. The rotating inertia of the supercharger rotors should not be "stopped" by a cog belt particularly at the shifts where supercharger and engine rpm are high. The engine drops 1500 rpm while the supercharger doesn't. The cog belt then attempts to "hold back" the supercharger. Not a good scenario.
Thank you,
Jim Bell
It's why Ford and GM use "clutch" alternators. Here's a simple analogy. The rotating inertia of the supercharger rotors should not be "stopped" by a cog belt particularly at the shifts where supercharger and engine rpm are high. The engine drops 1500 rpm while the supercharger doesn't. The cog belt then attempts to "hold back" the supercharger. Not a good scenario.
Thank you,
Jim Bell
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From: Redmond, Wa
Originally Posted by built54
hmm... when a lightning needs a cog system, I think the "warranty" on the truck is the last thing the owner is worried about...
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From: Redmond, Wa
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From: Surrey, England
I think Jim Bell does have a point there.
The belt slippage acting to reduce the shock at gearshift.
Without this something has to give way.
Maybe that why the belt tensioner is sprung loaded and not fixed.
Compensating for belt wear but allowing the belt tension to relax a little
when required like sudden change in RPM's
Admit is does sound nice, however will be interesting to see how it performs after a few thousand miles and some 1/4mile runs.
The belt slippage acting to reduce the shock at gearshift.
Without this something has to give way.
Maybe that why the belt tensioner is sprung loaded and not fixed.
Compensating for belt wear but allowing the belt tension to relax a little
when required like sudden change in RPM's
Admit is does sound nice, however will be interesting to see how it performs after a few thousand miles and some 1/4mile runs.
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From: Metro Atlanta
Or the Whipple's? Whipple is currently providing Cogged uppers.
So far their lay's little actual proof on the table as too actual damages caused, I have been going too and watching Drag racing since the 60's,,,Cogs every where.
I have set aside a set-up too go to a Well know blower company for testing and the countless folks I have spoken with whom are running Cog set-up's have and had zero problems.
Just so KB owners current and future can understand your reasoning, do you have pictures or some type of documentation you can share with us. I am aware of a couple of folks all ready running them on KB's with no problems as of yet.
So far their lay's little actual proof on the table as too actual damages caused, I have been going too and watching Drag racing since the 60's,,,Cogs every where.
I have set aside a set-up too go to a Well know blower company for testing and the countless folks I have spoken with whom are running Cog set-up's have and had zero problems.
Just so KB owners current and future can understand your reasoning, do you have pictures or some type of documentation you can share with us. I am aware of a couple of folks all ready running them on KB's with no problems as of yet.
Last edited by Dbl G; Dec 29, 2006 at 08:57 AM.
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From: Metro Atlanta
Originally Posted by Ricki F-150
I think Jim Bell does have a point there.
The belt slippage acting to reduce the shock at gearshift.
Without this something has to give way.
Maybe that why the belt tensioner is sprung loaded and not fixed.
Compensating for belt wear but allowing the belt tension to relax a little
when required like sudden change in RPM's
Admit is does sound nice, however will be interesting to see how it performs after a few thousand miles and some 1/4mile runs.
The belt slippage acting to reduce the shock at gearshift.
Without this something has to give way.
Maybe that why the belt tensioner is sprung loaded and not fixed.
Compensating for belt wear but allowing the belt tension to relax a little
when required like sudden change in RPM's
Admit is does sound nice, however will be interesting to see how it performs after a few thousand miles and some 1/4mile runs.
Your correct that is why a spring tensioning device is still being used in the set-ups that are currently on the market, There is nothing wrong with a Manufacture recommending the use or non-use of a product in conjunction with there’s.
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From: Metro Atlanta
Originally Posted by Hostile03SVT
what is the progress with the individual that is testing the COG on the Whipple??? id like to hear an update on that.. and post a video of the Whipple Cog...
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From: Metro Atlanta
Not too sound like Dr. Ruth ,,,I know the size of the shafts are MUCH bigger but,,,,Gee...
Stop the cogging can't a man get some sleep...It sounds like a bad Bavarian Movie.
But seriously Guy's if a company recommends or does not recommend a application for there product it SHOULD be adhered too strictly or weigh your options and your on your own. As with most after market products there is little if any warrantees once a product is installed in a arena other then it was designed for.
KB's have been around for some time and they produce an outstanding product, follow there guide lines for there products and all is good. Thru research, testing and development we all learn.
Stop the cogging can't a man get some sleep...It sounds like a bad Bavarian Movie.
But seriously Guy's if a company recommends or does not recommend a application for there product it SHOULD be adhered too strictly or weigh your options and your on your own. As with most after market products there is little if any warrantees once a product is installed in a arena other then it was designed for.
KB's have been around for some time and they produce an outstanding product, follow there guide lines for there products and all is good. Thru research, testing and development we all learn.
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From: Surrey, England
Well it will be interesting as you say belt driven asemblies (BDA) have been around for a long time, I was involved in the 70's fitting one onto a 3.1 litre Ford V6 which was a road / show car and worked well.
Damm great belt was like a conveyor belt
Looking at it from JB's point of view a motor dropping 1500rpm is one thing however the blower is turning many times faster so the rotational force must go somewhere.
Nice looking set up, I assume you are making these cogs yourself.
The kit on the RPM site looked quite good too.
However I would consult my motor/tuner and take his advice too.
If I intended to go the cog route.
That sound must be awesome and don't think the soundtrack does it justice.
Does your truck make more HP on the Dyno or have you not tested that yet.
Ricki UK
Damm great belt was like a conveyor belt
Looking at it from JB's point of view a motor dropping 1500rpm is one thing however the blower is turning many times faster so the rotational force must go somewhere.
Nice looking set up, I assume you are making these cogs yourself.
The kit on the RPM site looked quite good too.
However I would consult my motor/tuner and take his advice too.
If I intended to go the cog route.
That sound must be awesome and don't think the soundtrack does it justice.
Does your truck make more HP on the Dyno or have you not tested that yet.
Ricki UK
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From: Metro Atlanta
It has yet to hit the Dyno in it's current configuration, (Waiting on new injectors, COP's and Pumps) how ever it is easy enough too tell that there is no slip....and I was loosing H.P. & TQ.
I was running a 4# limited slip set-up W a L upper prior too this with larger Idlers and an after market tensioner,,,I would have sworn I had very little if any slip and loss of Hp and Tq. prior too the install of this set-up...I would have been very wrong.
Don't get me wrong here there will be more wear and tear. Weakest links on up,, Belt and or belt tensioning device, three bolts at the crank, six bolts crank hub to lower pulley, Blower Coupler, Blower shaft, blower internals and housing, crankshaft,,,etc. the weaker and or weakest link will always go first.
There are some of us that are over spinning our Blowers way past here recommendations and causing some problems, inherently we as MOTORHEADS want to push our toys beyond there limits,,,,,,i.e. that is why we have the Salt Flats....
I was running a 4# limited slip set-up W a L upper prior too this with larger Idlers and an after market tensioner,,,I would have sworn I had very little if any slip and loss of Hp and Tq. prior too the install of this set-up...I would have been very wrong.
Don't get me wrong here there will be more wear and tear. Weakest links on up,, Belt and or belt tensioning device, three bolts at the crank, six bolts crank hub to lower pulley, Blower Coupler, Blower shaft, blower internals and housing, crankshaft,,,etc. the weaker and or weakest link will always go first.
There are some of us that are over spinning our Blowers way past here recommendations and causing some problems, inherently we as MOTORHEADS want to push our toys beyond there limits,,,,,,i.e. that is why we have the Salt Flats....