cougarman

Looking for the some feedback on the belt drives.

Kinda like the Comp Cam's but I thought I heard some feedback that the idler was the weak link.

Then I heard Jesel and CV were the best and that CV was slightly better due to a larger bearing. But I can't even find one that CV offers.................

Thanks for any help and or feed back.

Jon

bob

I have been using Jesel for years. Change them out at around 100 hours. Never a problem.

hoozeyurdaddy

got my first jessel on now, no problems at all, and being able to adjust cam timing is nice. Go with Jessel !!!

cougarman

What are you changing out at 100 Hours? Belt only or additional parts?


Thanks
Jon

ROTAX454

He is referring to the belt. What GM block do you have? Mark iV, Gen 5 or Gen 6? The Jessel BBC kit is made (bolt on) for the Gen 5. You must modify the block to accept the Jessel base timing cover. Yeah, I thought the same thing. $900 bucks and Jessel engineers can't produce a base cover for the Gen 6 block. Guess the Gen 6 hasn't been around long enough. What is it, 10 years and counting? Still, great piece and easy cam timing changes. When ordering, make sure you specify which cam you will use, solid or Hyd. roller. Yes, it does make a difference.

cougarman

Thanks for the info, would you do it again if starting from scratch?


Thanks
Jon

ROTAX454

Yes. I like having the ability to adjust the cam timing without removing the timing cover. Which of course on the Gen 6 is a royal pain in the azz. Although the cam LSA prescribed by the manufacturer usally develops the best power, it is still great to have that ease of adjustment on the dyno, and to see the results.

BenPerfected

Here is my 2 cents. I have been running the Jesel timing belt systems on numerous sets of engines for over 10 yrs. I think they are more a maintenance issue than a significant benefit. Having said that, most/all the NASCAR Cup, Busch, and truck teams run a belt drive.
We have replaced numerous seals and at least one lower pulley....plus the belts. I think the 100 hr parts change estimate is close....but a leaking seal NEVER happens at the end of the season. I also think there are numerous $1000 performance parts that bring more value on HP marine engines.
Most of the time you are looking for 2-3 HP with the cam setting vs the cam manufactures recommendations. If you can borrow a belt drive for dyno testing, you will be $900+ ahead...unless you want the bling factor

mrhorsepower1

I use nothing but Jesel when doing a timing belt system. Zero problems, and yes multiple advantanges. The timing belt is more accurate the a chain, it does not stretch like a chain, Installing the belt system allow you will pick up 15 or so additional HP , ability to adjust camshaft timing when on dyno can result in major gains in HP. I have seen average of 15-20 HP improvements moving cam timing around sometimes more pending on application and set up. If you have the extra money they are nice.

cougarman

Do you use many for Marine use or mostly automotive?

Thanks to everyone
Jon