Comp and Jesel belt drive.
 

I have been looking through some of my magazines and doing some searching online, I see that CompCams makes a couple of different belt drives and Jesel has two different ones as well. I have been leaning toward the Jesel drives, but now they offer a 1 piece upper pulley system that is around $250 less than the two piece system. What would be the benefit of the two piece vs. the one piece?? Is the two piece worth the extra $$? Has anyone used the CompCams belt drives and how do you like them? Thanks.

I've got a comp-cam on a sm/blk 434" but have not installed the engine in the car yet. I also have a used jessel under the work bench, that i bough after the purchase of the comp-cam unit. I've run jessel in the past (2 pc.) and i can tell you there is no comparsion on workmanship between the jessel and the comp-cam unit, plus when i started unwrapping the comp-cam unit, i found a made in China sticker on some of the assembly parts. The one i bought does not have the idler pulley, i wouldn't buy another one but since i already it installed, i'm going to try it :?: hoping it don't bite me in the butt.

Zip.

We are at present using the 2 pc BBChev Jesel piece & really like it Quality fitment,tops.I wouldn't by choice use a belt system with an idler either.Having not seen a one peice top gear I can't say for sure but I would wonder how fast timing changes would be accomplished,something that is very quick & east with the 2 pc system.

I am running the Comp on my BBC and I like it. I have not had any problems out of it.

Jesel or Comp cams belt drive
 

JESEL HANDS DOWN,WOULDNT USE ANYTHING ELSE...2 PIECE MOST DEFINATLY IF U DO A LOT OF CAM TIMING CHANGES AT THE TRACK LIKE I DO

I wouldn't look at either one, CV products makes billet belt drives that cost less then Jesel, and much nicer and easier to install then both.

CV Products make the best timing belt by far. Used the jesel and had nothing but leaks and clearance problems on my 10.2 dart big block. I highly recommend CV Products. Very nice looking billet cover also.

I have a jesel on mine and is fine put a comp on a buddies and thought it was a little easier to use

I was told that the block requires machining to fit the jesel back plate. Is this true or is it a bolt on replacement to a chain?

On our block (Mk 4 ~72 era) it bolted up no machining whatsoever

Belt drive
 

Here are some sites:
http://www.cvproducts.com/category.aspx
http://jesel.com/index.php?categoryid=9
http://www.compcams.com/DefaultWide.asp

Thanks everyone for your repsonses! I bought a new Dart Big M block with the 55mm cam tunnel and .904 lifter bores, RFD Edelbrock Victor heads and 1600 Pro System carb. I am building a 532 cu in engine and I want to put good reliable parts in there. I have to get the belt drive, crank, rods, pistons, oiling system, and pushrods yet.

"Dreams Are Built One Part At A Time"

Have fun with your project.........

Jesel hands down...... and never had any leaks!!!!!!

i got a comp belt drive on my motor. Only thing i dont like about it is the belt is so much wider than the jesel. They have you put spacers on your water pump. (min 1/4" spacer) other than that its a nice piece. I havent had any problems at all with it. I broke a crank and it knocked every valve and locked up the cam shaft. Broke the belt but nothing else got damaged belt drive wise.

If you buy a Jesel you will have to get the cover and the block machined. The Cv products cover just bolts straight on. I have just gone through this with mine. I ended up selling my jesel 2nd hand.

the jesel will bolt straight up to a standard block(2 or 4 bolt). But it doesnt bolt straight to the Dart Big M.

The Jesel bbc aluminum housing (cover) will generally bolt right on to GM production blocks. The interference is in the variation of block castings, not the Jesels. Both Jesel and CV are top notch quality, but I would stay away from the Comp Cams piece.

If thats the case then the CV one would be a good choice since it is a good product and save me a couple of $$$ of machining the block and cover. Thanks.

The CV (Xceldyne) stuff is very nice. Thats all we ran on the cup stuff. The last big M I built, the jesel did not hit the block, however it did hit the oil galley plugs behind the cover. As far as the comp, we have used them with great luck, but it is not the quality of the jesel or CV. I think the comp with the idler would be the way to go if you are running something that has been Aline honed.

The Jesel and the BigM , The only place where I have seen a problem is the oil galley plugs. Use short pipe plugs and very little grinding to make them flush and thats it...

We got a 2-piece comp on a bbc in a fed that has given no leaks or problems.BUT,it only has about 250-300 passes on it right now.Can't say for sure,but seems to be just fine. The extra idler scares me personally. That's a pretty small bearing in that puppy.I haven't done the math,but I would say that around 7500 rpm's ,I'm sure that little bugger is gettin' on with it. Seems like alot to ask out of such a small sealed bearing.Our block has been align-honed and we got a drive without the idler.It's fine SO FAR. I would just about chose one on price or parts availability since it sounds like noone has really had bad luck out of any of them.Just my two cents.