Was talking to a guy who had a car almost like mine 88 trans am. He had a Procharger d1, said he had a lot of truble with belt slippage in the beginning,but that was all taken care of. Opend the hood and there was a chain on it!....wtf I said...he said an engine builder made the setup for him out of a motorcycle parts...

Dont have any pictures but plan to seek him out again and snap a few.

have anyone ever heard of that done before ?

He was also working on some kind of special intercooler, should be done in a week or so..will get back on that when I see it.

thanks

 

There is a Mustang that races in the NMCA and I think its piloted by Ross Stomp. It has a procharger with a chain drive on it.

Ive seen photos of it. Its a pretty wicked and Im sure VERY HARD on the bearings in the short block.

But I bet it doesnt slip. LOL

 

why would a chain drive be harder on the barrings than a belt ? I would think it would be easier on the barrings because you dont have to tighten it insanely hard to keep it form slipping.

thanks

 

Wow- never seen one like that before.

I wonder why go with a chain? A cogged belt setup could be had without the DIY fabrication. They've been using cogged belts on blowers for decades. And they don't slip, either.

 

the belt shouldnt have been slipping in the first place. somthing obviously wasnt right.

i would assume he chose chain because in his mind he didnt think belts were adaquate...

 

Chain drives were first used with roots superchargers in the early days of hot rodding. One reason is because before gilmer belts were made, vee belts was all there was. Huffers ran 2-3 or even 4 vee belt set ups to drive the jimmy. Chain drives are the most acurate and do not slip but when a back fire occours the end results are catostrophic, flying shrapnel etc. The 8mm pitch is the strongest belt, but even it slips on high end systems from time to time, litererally shearing the teeth off the belt and tossing the belt off the dragster, tractor puller etc. Chain drives are just plain dangerous in more ways than one.

Note either the 8mm or 13mm is the strongest I think.

 

Next time try to get some pics of that.

 

i bet it sounds pretty funny

 

belts slip its a part of life, it doesnt mean theres anything wrong, its the nature of the beast. Otherwise the manufacturer wouldnt offer different belt options

 

There is a Black Rustang that runs in the Edelbrock Pro Series http://www.fasteststreetcar.com/ that runs one of those chain Driven Prochargers. it sounds like mini bike when the motor is @ idle with the chain slapping around, but when he gets the R's up & puts a load on it, you cant tell it from a belt driven one.

it also has a W-A IC in the passenger compartment, as most of these guys do.

this car is pretty bad, IIRc, he is in the 7's.

in this setup, the blower is mounted backwards & right smack in the middle of the car. if you goto thier web site (the link above) there is a picture @ the top of the page that rotates between this car, Musi's car, Uratchco's 69 Camaro.

Bob

 

I would love to see pics im also interested in the link size they are using, how about idlers/

 

Shouldn't need any idlers in a chain driven application. Maybe a nice chain guard. Keeping the sprockets aligned would be important. I'm sure a chain breaking at high rpm will have no problem going through the hood.

 

just to clarify, there is several cars running with us in the NMCA with these setups, a first gen camaro, a couple of mustangs, and there is one other i have seen. the chains are cool unless you break a chain, and it goes flying through your hood. i would go with a cog setup myself, those chains are really loud, and if your making enough power to take advantage of them, then your making enough power to break them as well. oh, and Ross Stomp has been racing nitrous fed chevys for a long time. don't think he is running a procharged mustang. he currently has a beautiful 72? Nova.

 

No Im certain its Ross Stomp

http://www.procharger.com/RACING_NEW...pdate.aug.html

 

i stand corrected. i haven't seen him in a while and the last time is saw him, he was racing a very nice blue nova. well, come to think of it, he has a large amount of money, it is possible for him to be running both cars, that one at the nmra races and the nova at nmca races.

which would be why i haven't seen it yet.

 

Thats a huge blower.

 

Those pics are from the US131 NMCA race.

 

Ross was running the Nova @ the Pro events, & I hear that he has a new car for that series.

the chain looked to be about the size of the chain on my buddies Harley. it was pretty darn big. I thought that the chain gaurd was pretty thin, but Im sure its just to keep fingers out & not the chain in (there is NO way its keeping that chain in if it breaks).

Bob

 

It needs one of those saftey stickers put on machinery that have chains.. lol (pics of a hand getting crunched in a gear/chain)

 

i've never heard of a chain driven setup. I have seen a supercharger on a 4 popper toyota, the guy ran his serpentine belt upside down. Said he kept throwing the belt when its put on the right way. I would have tried to change pulleys or checked tension/alignment. Try another belt or something, talk about looking like a retard.

 

that's an F-4 correct, or am i all kinds of wrong on this post...sorry bout the misinformation.

 

F-3R it says on the website.... dang that looks mean as hell LOL

 

[sarcasm]hmm its a good thing he didnt ask for the big procharger[/sarcasm]

I still want to see what "kind" of chain is being utilized. is it multi link like a transfer case? double row? what # chain is it? I think the weight of the chain if the blower is far away like mine could create too many problems.

 

I tried searching yesterday for better pics of the chain. More direct shots but no luck. I think its too new, and since its likely only a race item, probably not a lot of cars out there in the general public equipped as such.

I cant imagine it being a LARGE pitch chain. Hell, maybe a double 40 pitch or something?? Id think that would work. When you get two rows of that stuff strung tightly together, its pretty stiff. Who knows though. Id like to see more.

I should have made it out to at least ONE of the big races' world finals but I had plans every weekend. Maybe make it to one early next season.

 

When I first heard of the motorcycle chain drive, I thought "dang, I'm running to the first motorcycle JY and pick one up". Then I torn into it a little more.

A bike will buzz 8000 RPM at the crank, so with overdrive from the tranny the drive sprocket will spin about 10,000 RPMs. With a 3.5 gear reduction, the wheel sprocket will spin ~2900 RPMs.

So now the larger driven sprocket becomes a drive sprocket at the crank (6000 RPMs) and the smaller driven sprocket at the supercharger is turning 21,000 RPMs.

So the sprocket set speed is doubled which doesn't sound too out of line for the set.

 

try 15,500 rpm at the crank on some new bikes


Zac

 

this is good info

 

Since this a home brew design, I don't think too many people would hack into a new bike. Most bikes in the JY are gonna be 10-15 years old, unless they have a bad case of concrete poisoning.

 

Motorcycle sprockets are cheap, ~$50-60 any size you want, a nice 530 chain costs ~$80+