aargh... my belt is slipping under full load conditions. (read-WOT)

looked in the faq, nothing there.. my pulleys have shiny silver places on them.
should i take pictures & post them?
(i think i shall.. brb w/pics)

anyone else?


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brooks
'00 silver "L"
member NLOC #496
my zing albums - _-click here-_

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Here is a thread that discussed it a little
https://www.f150online.com/f150board...ML/005799.html

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Jim
Jim@FordMotor.cc

Black 00, 4.10's, SuperChip/R9, super whites, Airaid w/10" Big Mouth, Mobile1 w/FilterMag, chrome wheels, AIM 2" drop, clear corners
2000 E320, 1993 Cobra R, 1959 Corvette,
1949 Plymouth Coupe

 

those guys have experienced belt slip with a chip... i haven't got a chip yet.

maybe i'll buy one now that i'm healed up enough to go back to work!

 

Hey try a little VHT on your belt..just dont overdo it or it may cause it to drag by sticking to the pulley..i have seen a pro do this before with a serpentine style blower setup...i have never tried tho..see ya

Chris Hitchcok
99L 13.69@99.9
92GT 9.80@139.70

[This message has been edited by Cobra331a4 (edited 09-11-2000).]

 

don't overdo it? darn.
i was gonna go to the track next weekend, do my burnout then pop the hood & get the track team to hose the belt down with vht. LOL

what about different types of "belt dressing"? we have cans of that at work. (not sure which brand.) it only works for a little while & gets everything sticky as heck.

i only have 9500 miles on my truck, it shouldnt be slipping at all.

maybe there's a different brand of belt we can use? maybe a new tensioner? (sp?), smaller belt?, is a pully trying to lock up?

 

clonetek,

What makes you believe that the belt is slipping?? The two idler pulleys below the supercharger pulley will get shinny over time due to the friction between the belt and pulley as the belt tries to bend around the pulley. This would be completely normal. The belt transfers power so unless the pulleys are seizing (they should require almost no power to spin), the belt is not slipping (other than that required to conform to the pulley surface) on the idler pulleys. Let me know if this is not clear, or if I have misinterpreted your concern.


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Joel.......
99.5 White Lightning,
SVT # 0056

 

Is it the idler pulleys that have shiny spots? Mine does too, from normal wear. If it is really shiny, the pulley has seized, add oil, not something that will increase the friction.

 

joe - the screeching sound coming from the wrong end of the vehicle tipped me off...

its supposed to come from the rear tires, yes? LOL

 

http://www.zing.com/album/?id=4293637657

pics of pulleys.

 

What I'd really like to see would be an aftermarket toothed belt & pully setup. No slip at all then. Plus the toothed belts have that awesome sound even at idle that let's others know you're not to be messed with. How about it? Any manufacturers out there willing to make & market some pulley sets?


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2000 Red SVT Lightning
Superchip
Spray-in bedliner
Snugtop Snuglid
Tinted side windows

 

For what it's worth, and I did post this almost a year and a half ago, mine has "slipped" on WOT from the first time I took it to WOT. It is not a noise I notice and still notice, it is a definite smell of burning rubber. And, it ain't the tires guys as I don't smoke em hardly ever anymore.

My dealer was never able to offer a suggestion although I took the guys on several test rides and they did admit it smelled like a belt was slipping and also that the wear/rub marks on the pulleys indicated some slippage.

After 11000 miles, I just live with it as I do a few other items. The belts have never broken or even look worn, the pulleys are free (not seizing up) and I do not lose boost when the smell intrudes into the cabin.

I know that doesn't help much, but like I say, I am just living with it.

Bill

 

Maybe it is just semantics, but let me try this again. The belt CANNOT be slipping on the idler pulleys unless they are not spinning freely. Possibly (but I sincerely doubt it) under WOT conditions the radial load on the bearing is so high that it momentarily binds, but if this happened I believe you would damage the bearing and it would deteriorate rapidly from there (seize). Bill, I remember your posts last year and watched how the paint on my pulley slowly wore away. Your pulley hasn’t seized, mine hasn’t seized, so it can’t be slipping there. I find it surprising that only a few of the ’99 owners complained of this smell, and I can’t recall any ’00 mentioning it.

As I tried to explain in my previous post, the wear we see on these idler pulleys is the belt polishing the pulley surface. Try this analogy: Take a stack of paper and then bend it . You’ll notice relative motion between the pages, which is just like the belt’s relative motion as it bends around the pulley face. Nobody ever had a problem with the old V-belts polishing the old pulleys. These idler pulleys see more bending then is typical because of the size of the S/C pulley and the load it must transfer. I’m sure the engineers at Ford determined how much power the S/C consumed and then calculated how much contact surface area was needed to transfer this power. Walla, that’s why the idler pulleys are so close together. Hope this helps. (I’m sure someone will let me know it they think this is BS J.)


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Joel.......
99.5 White Lightning,
SVT # 0056

[This message has been edited by JoeLightning (edited 09-11-2000).]

 

I guess after 152 posts I entitled to a "double post". Sorry

[This message has been edited by JoeLightning (edited 09-11-2000).]

 

okay.. i understand that the paint is being worn off the pulleys.

if the belt ISN'T slipping, then WHAT is?

 

JoeLightning and the rest of the mob:

Honest Injun, I am not an engineer, never will be one and profess no ambition to be one.

Just an old, read 60 years old, hot rodder/street rodder.

Regarding older vehicles, there was from time to time a situation where belts, of whatever type, would temporaily slip due to what I will call here "torque forces" or perhaps "rpm forces".

This did not necessarily mean a design fault or flaw, but merely a momentary point at which the torque/rpm sort of overpowered the design parameter/s of the belt system.

Again, as a non-engineer type, I have just sort of come to accept that under WOT conditions my particular Lightning emits a very distinct burning rubber smell that I so far can only attribute to one or more of the V-belts that run around the front of our motors. In fact, I am willing to accept that it may not even be the belts associated with the SC, it may be one or another of the myriad of belts that we are blessed with.

For the record on this particular thread, I would also like to say that I get this smell at virtually any WOT application where I stay on the throttle for several seconds and get pretty much 8+ pounds of boost.
Which is to say, again, it is not the tires, certainly not when I do a 50-100 burst at full throttle.

Not trying to pick an argument, that is not my way, but there is something in the total world of Ford's serpentine belt system that in my opinion seems to be a bit, shall we say, "slippery and smelly".

Nest!!!!

Bill

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99.5 Lightning
Build #247
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