An interesting observation...
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
An interesting observation...
Last week, we went to Sebring for the 12 hours.
Chevy had their display up... the C6R engine... and a NASCAR engine...
The NASCAR engine uses a timing belt, not a chain.
That is all.
Chevy had their display up... the C6R engine... and a NASCAR engine...
The NASCAR engine uses a timing belt, not a chain.
That is all.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Interesting. Although the Nascar engine doesn't have to survive 150,000 miles between rebuilds.
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Cam belt drives for Chevy V8's have been around for a while in drag racing.
Here is an image of the RCD piece, I remember thinking that it was racy to
see the exposed belt under a hood (and I still think this is one of the visual
go-fast parts that a non-race vehicle can use for impact.)
I would have thought belt drives would have been in use for a while in
circle track racing - are you saying that they have only recently been adopted?
Goodyear meets NASCAR's demands for cam drive belt
.
Here is an image of the RCD piece, I remember thinking that it was racy to
see the exposed belt under a hood (and I still think this is one of the visual
go-fast parts that a non-race vehicle can use for impact.)
I would have thought belt drives would have been in use for a while in
circle track racing - are you saying that they have only recently been adopted?
Goodyear meets NASCAR's demands for cam drive belt
.
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
I don't know when they were adopted. I was hoping someone could chime in and fill us in on that detail.
It's just the first time I have seen a show motor with a belt.
that link is interesting.
It's just the first time I have seen a show motor with a belt.
that link is interesting.
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Burning Brakes
Joined: Sep 2005
Posts: 993
Likes: 3
From: Iowa
All of your high end engines will use the belts if they can/want. The Jesel belt drive is the most commonly used but others are coming out. It's freaky to think that a belt works but it actually works very well and has many advantages over anything else out there. For about $800 you can have one on your first gen sbc. Since there is only a dust cover (and sometimes nothing) you can adjust anything you want on the camshaft without opening up the engine and it frees up some hp.
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
If any of you guys every worked on snowmobiles and saw the abuse that a drive belt takes, albeit a larger belt than a timing belt, you'd realize those things are pretty damn stout.
I work with timing belts at my job and those little turds can take hella lot of abuse.
I work with timing belts at my job and those little turds can take hella lot of abuse.
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
belts are not weak... they are used in all sorts of applications.
It's just different for the SBC. I am wondering if oil control is one of the reasons they did this... think about it, they could seal up the front of the engine, removing leak points... just a thought.
It's just different for the SBC. I am wondering if oil control is one of the reasons they did this... think about it, they could seal up the front of the engine, removing leak points... just a thought.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
You actually have more leak points using the belt, because now you need a cam seal.
Instructor
Joined: Aug 2006
Posts: 121
Likes: 0
I watched Pinks and a guy raced a '70 or '71 with a 454? engine. It was the vette designed for drag racing. Anyway the vette beat the guy he was racing but it broke down after the race and the driver said he lost his timing belt. I agree with the first post - I thought it would have used a chain. A friend told me belts are easier to adjust at the track or something.