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Broke something

 
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SMOKEmUP
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Joined: 30 May 2002
Posts: 3169

65093.54 points


1979 Chevrolet Camaro

PostPosted: Fri Sep 22, 2006 11:55 pm    Post subject: Broke something Reply with quote

I was out tuning the car and getting everything dialed in before heading up to the track tomorrow. About a half a mile before my house something went. Not sure if it's the engine, transmission, or rear end. I took a look at the data log (because I was logging) and I don't see any signs of knock or lean air fuel ratios so I think it's the transmission or rear end.

Tomorrow is another day and I will let everyone know what blew up. cry baby
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artinla
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Joined: 09 May 2006
Posts: 233

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1971 Chevrolet Nova

PostPosted: Sat Sep 23, 2006 12:42 am    Post subject: Reply with quote

Sorry Smoke, I am hoping for the best for you.

Art
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jeep_406
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Joined: 12 Sep 2002
Posts: 1661
Location: Tewksbury, Mass 01876
53123.48 points


1972 Chevrolet Nova

PostPosted: Sat Sep 23, 2006 9:51 am    Post subject: Reply with quote

SMOKE,

Once they found out that you wouldn't be racing, New England Dragway closed for the day.

The fact that it's raining might have also played into their decision Crying or Very sad
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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Sat Sep 23, 2006 12:26 pm    Post subject: Reply with quote

Good news.

The problem turned out to be the serpentine belt went. What happened is it jumped only part of the way and the belt shredded, started to hit and wrap against other things (the noises I was hearing). It was totally dark and really late when this happened. I shut the car off immediately and popped the hood I felt the belt, since I had not light ( I must have picked the one area that was good). Then coasted the car down the hill in reverse into a parking lot and walked home.

So I'm off to the parts store to grab two belts (one for a spare). The hard part will try to figure out why the belt jumped. Maybe those 6600 rpm blasts bouncing off the rev limited have something to do with it, naaaaaaaaaaaaaaahhhhhhhhhhhhh!.
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beersngars
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Joined: 04 Feb 2006
Posts: 390
Location: Ohio
13369.80 points


1948 Chevrolet Coupe

PostPosted: Sat Sep 23, 2006 12:51 pm    Post subject: Reply with quote

Lucky!! If it were me , it would have been the engine, trans and rear end. Rolling Eyes

Check the tensioner.
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10sec.et
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Joined: 29 Mar 2006
Posts: 3472
Location: Houston,Texas
346624.78 points


1969 Oldsmobile Cutlass

PostPosted: Sat Sep 23, 2006 1:33 pm    Post subject: Reply with quote

check alternator and power steering too. either of them can cause a belt to "jump off" at high rpm if the bearings are starting to fail.
_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Big Dave
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PostPosted: Sat Sep 23, 2006 1:46 pm    Post subject: Reply with quote

Believe it or not GM expects you to replace the tensioner when you replace the belt. Both are rated for only thirty thousand miles.
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artinla
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Joined: 09 May 2006
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1971 Chevrolet Nova

PostPosted: Sat Sep 23, 2006 11:16 pm    Post subject: Reply with quote

Glad that was all it was.
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clay
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Joined: 24 Nov 2002
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1972 Chevrolet Nova

PostPosted: Sun Sep 24, 2006 8:55 am    Post subject: Reply with quote

Woohoo! Glad that's all it was. I see in the latest Popular Hot Rodding that Comp Cams makes some sort of woop de doo billet tensioner that supposedly solves the belt problem. It sound like it isn't spring loaded, but lets you manually set tension and not let the belt push it back and loosen up and throw the belt. Anyway just thought I'd share that in case you didn't know about it yet. Clay
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Big Dave
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PostPosted: Sun Sep 24, 2006 9:00 am    Post subject: Reply with quote

Smoke you may want to set up a movie camera on a tripod and "film" in slow motion the belt operation from various angles as you bring engine up slowly to max speed. Pay special attention to the tensioner to see if the belt's harmonics are overpowering the spring.


Big Dave
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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Sun Sep 24, 2006 8:43 pm    Post subject: Reply with quote

I switched to a smaller belt. The UD pulley is made by ASP and they recommend a 76" belt. I switched to a gatorback belt and went to a 75.5" instead, we'll see how that goes.

Last edited by SMOKEmUP on Mon Sep 25, 2006 1:22 pm; edited 1 time in total
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af2
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1933 Willys Coupe

PostPosted: Sun Sep 24, 2006 9:18 pm    Post subject: Reply with quote

Good choice! I went 1" when I changed to the March set up and never had a problem at 4800 Shocked That was the end of the power with tuned port 383!

It kept the idler tight with no bouncing!
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clay
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Joined: 24 Nov 2002
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Location: South Carolina
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1972 Chevrolet Nova

PostPosted: Mon Sep 25, 2006 4:42 am    Post subject: Reply with quote

Changing brands of belt was a good move also, never had a problem with a serpentine, but we have had problems with cheaper "V" belts jumping off of well aligned pulleys. Hope the shorter belt solves the problem. Clay
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Paul P
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Joined: 15 Aug 2002
Posts: 2393
Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Mon Sep 25, 2006 8:06 am    Post subject: Reply with quote

Sounds like a good idea.
Goodyear or Gates are the only brands I would use.
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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Mon Sep 25, 2006 1:23 pm    Post subject: Reply with quote

So far so good. We'll see how it holds up.
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