Didn't want to spoil the surprise until Branson as to what I have been up to, So for those that attended...you have seen it, and for those who didn't, here is your sneak peek at the first ever prototype I made of the first ever cogged belt system for a GTP.
The trip to Branson was its first ever test run away from home out of the garage. Let say, ever time I went to pass a car, or got on it for the fun of it, or did a few WOT runs, or a burn out or two...it always brought a smile to my face regardless. It preformed almost flawless, aside the side of the belt getting a little worn, that I plan to re machine two of the pulley sides that keep the belt tracking.
Installed with the 1" wide belt (production is 1 1/4" wide belt)
Installed with the 1 1/4" belt:
(Some minor changes have been made here and there since these pictures have been taken.)
As you can tell the supercharger pulley is built around a D.U.B. hub, WITH granted special permission and blessings from Terry of South Florida Pulley HQ to build upon his proven design I began my work.
The pitch we decided on was a 5mm pitch. To do this we used a specially re cut straight tooth side milling cutter and a Dividing head on the Mill. Rest was easy, yet time consuming. (besides all the measuring, figuring, and producing the rough copy before the final milling)
The balancer shown is a 8 rib ZZP modified balancer I bought from ED who out bid me at the 2nd. Annual Branson GP Meet. But built and designed around a stock balancer as well. It actually presses onto the balancer, and then three grade 8 bolts with stainless washers insure it does not twist under the torque. I only used this balancer because my current stock one was about shot.
The rest of the pulleys are all serviceable too BTW, and can be serviced as needed by any one with basic hand tools. No arbor press is needed to remove and reinstall the Timkin Bearings within, a simple snap ring plier will do the job easily.
All these parts are the only ones currently made, I have a few extra supercharger pulleys in different sizes already made up, and a few various cogged pulleys for different belt lengths I am playing with. I only changed one pulley for the trip to the Branson Meet to get around the shortness of the belt, other than that, exactly the same as pictured.
All these billet aluminum parts were made by hand, using manual machines. (NO CNC machines at this time) As we wanted to make the kit FIRST, then model the others (if any) from this kit later once we have all the bugs worked out.
Because these parts are spun on a lathe, they will not effect the rotation of the motor, or add any or off set the balance of the motor. Only thing that is important, is when installing the crank sprocket is to torque evenly the three bolts that seat it onto it, because the outer hub floats on rubber, you get one bolt too tight, and the whole thing will wobble like a bent wheel.
Only thing additional one would need to install this on a stock motor still using the stock oil filter elbow is to run a spacer between the elbow and the front engine cover it bolts to to space the filter out away from the balancer cause there is no room for the belt there once installed. Could work on making one myself, but not needed cause I run an INTENSE remote oil filter adapter, so I have all the room in the world.
Let it be known, who was the first to make, produce and test this item for those who have been interested in such an item for many years. This has been talked about since I can remember but nobody with better finances and income than I wanted to step up to the plate and try to make one out of fear that the additional noise would throw off the knock sensors, so why try and waste the money as it was said.
Lets say yes there IS noise, some to very little at idle to accelerating and decelerating where it obviously becomes much louder.
There is NO knock from this noise across the board.
The only knock my computer reads is from the typical '97 partial throttle knock of your casual driving that is very hard if not impossible to fully tune out.
Belt slip is a thing of the past with this system, lets just get that out now as you can guess as to why this was developed. I myself did not have the belt slip problem as many do, but since this a common problem among many, and many would like the added benifit of the noise that sounds very much like a turbo, you kill two birds with one stone.
Oh ya, Patent pending.
~F~
Originally Posted by justwhisen
