I was wondering why you could not drive your blower off a chain and sprocket?? i mean keep your stock setup on your vette and then fabricate a sprocket from crank to blower???

is it possible?

 

You can absolutely do it.. I have one pretty much made that I will use depending on how badly my 12 rib belt slips. I know people say that you should not run a cog (or chain) set up on the street, but the fact is that you do not have to tighten a cog or chain sprocket nearly as tight as a serp. belt thereby lessening the side load problems for your crankshaft. The only warning I got from Procharger is that the racers are having to change their chains every 12 runs because the blower's resistance is pushing the grease out of the o-ring chain causing it to fail, and you wouldn't want that chain coming aprt or flying through your hood as it would destroy anything in its path. The chain I was going to use was the best motorcycle 530 chain you could get. The guys at Procharger were honestly very little help and were never able to explain to me why a blower would be any harder on the chain than a liter bike. I would think the stress put on a motorcyle's chain would be immense....


[Modified by TONYDEE64, 1:59 PM 6/24/2004]

 

Would you use just a single chain or more than one? Just curious. TIA

 

I wonder how much noise it would make?

 

You use only one chain. BTW, that would give you guys plenty of room in your C4 I think and would solve your slippage issues. It would not be very noisey at all. The blower itself would likely make more noise than the chain... My only hesitation was the threatened chain failure.. even though it just doesn't make any sense to me... If you were constantly cranking it at 25psi I could see where MAYBE it would fail..... I dunno.

 

Sure anything is possible but what about lubrication needs for the chain. Can you imagine the mess you would have under the hood with an exposed chaing running around at 6500 RPM? Remembe oil attracts dirt, and just like a dirt bike chain its going to get real messy fast under your hood. I have been running my cogged belt setup since late 96, its a timing belt for a Toyota DOHC engine. And I can say that driving the blower is much easier than driving two cams with all that cam follower loading.

In the 8 years I have had the system, I have replaced the belt twice. Once for the heck of it because I had the blower out, and the other time because I actually damaged it because of a fuel system failure. Which caused the engine to back fire and well when that happens the blower stops but the engine keeps going and I stripped a few teeth off the belt.


[Modified by tjwong, 9:57 PM 6/24/2004]

 

Tom, but how much harder would the blower be on the chain than a motorcycle? Also, a motorcylce chain doesn't throw oil/grease everywhere, which is not to say that some lubrication may be required. Do you think the chain would survive? A motorcycle chain whizzes around pretty quick too..

 

Well a 502 BB chain is about the same size as a 520 dirt bike chain and it whizzes around at 6000 RPM! I guess you can use a O ring style chain but getting the routing and guides designed is going to be a real b***h! How much boost are you planning on that is going to require a chain?

I guess you are right about the chain not throwing so much grease around. I have several dirtbikes and I use O ring chains and for the most part I never lube them. I have been riding in the deserts of New Mexico all these years and I never run into mud or very seldom I do. So consequently I just ride them and as far as lube goes all I do is hit the chain with some WD40 to keep the rust off the links. With the old style non O ring chains a lot of lube is required in offroad situations and they do make a mess depending on the lube you use. In industrial applications chains of that sort are lubed periodically and the lube that I have seen in that situation does make a mess.


[Modified by tjwong, 10:09 AM 6/25/2004]

 

If Kevin had his way it would be about 20lbs of boost

 

DAmn right baby! 20 psi! See I had a 1992 Tar Mack GSX-R 750 stroked out to 1100 and full yoshimira racing heads, cams, carb..Etc everything you could think of... and I remember dropping my sprockets for quarter mile and when I got my new chain the guy said it would be good for 15000RPM for hours on end? I said "whatever give me my bike" So I ran the hell out of it and never had a problem and actually I think he told me to oil the chain I never did but all in all the chain outlived the bike? NOW, this is what I was thinking (oh god me thinking is a disaster waiting to happen) go get a chain, then get a used corvette crank (junkyard) then plasma cut the pulley off and then spec it and clean it, grind it down so it is flat. Then weld the sprocket on to that and I would have the crank pulley. Then I have some 4" used pulleys from procharger and cut that off same steps as crank and run a 4" pulley on that of course welded and then adjust the links as need so it is nice and snug and then bolt it all on and so I would have my stock serpentine belt running my AC,Water pump, Power Steering, Alternator and Tensioned. Then bolted to that the Chain setup! So like the vortech has on the mustangs but mine would be chain. I mean come on if I ran my bike to 15000rpm minimum for god I donÂ’t know how many times it should hold up?

So I am going to talk to my buddy Keith and see about cutting some pulleys and such and trying it out...! Also I think when I do this I am going to drive around with the good off just incase that sucker fly's off at 6800rpm!

Also when I did my bike chain it actually sagged a bit not to much tension at all and I do remember coasting at 80mph with the clutch in it made some noise but not as loud as my damn blower?

If I get it to work and prove it ANY BUYERS INTERESTED! "WHAT THE"!!



[Modified by krivera, 12:20 PM 6/25/2004]

 

Do it man. do it! I don't see any reason why what you explained above won't work...!!! We want to see some pictures.. And yes, you would have some customers if you are able do it...

 

Kevin,

I would buy (if it isn't too expensive) and I'm practically neighbors with you. (colorado springs)

I still have to come look at your shop next time I'm up in denver.

How's that going by the way?

 

I love stupid questions....I was the king in high school ...good idea and I'm in for one , why not just weld it to the outside of the crank pulley and just run the blower with it.........the blower is spaced out from the bracket.remove spacers and relocate the alternator...its a stright shot to it......my brother ran a 1400 engine running alcohal and nitrous at 220hp on a chain with no problems and were looking at what 80hp to drive the supercharger?

 

LEAD FOOT! dude you read my mind man! i was thinking SH|T i will weld it to the stock crank pulley relocate the alt, and space out the blower a little

VVRRROOOOMMMMMMM!

 

Here are a few photos I took of my chain drive setup. I bought the idler and blower hub from Procharger and paid WAY too much for what it is.. I bought the crank sprocket from Martin sprocket (on the web), and simply bored a hole in it and drilled it for the BB chevy crank pattern. The idea is to buy a blower sprocket that will be drilled and bolted on to the blower hub. Instead of using the Procharger hub which has a 1" diameter that is too large for my blower, it's made for an F3 or F4, I am going to use a sprocket I bought from a tractor farm supply store that will work WITHOUT a Procharger type blower hub (and it only cost $10 or so) I think I paid $125 for that Procharger blower hub (non-returnable) and even more than that for the idler... which is nothing more that a couple of flat pieces of aluminum that have been grooved for bearings (non returnable also).. no big deal to make.... The crank pulley is a 6 rib from March.

http://f2.pg.photos.yahoo.com/ph/ton...@sbcglobal.net




[Modified by TONYDEE64, 10:32 AM 6/27/2004]

 

Looks great!