2nd LET 185mm pulley exploded in traffic at 25MPH
2nd LET 185mm pulley exploded in traffic at 25MPH
I am working with Needswings to get all the parts to go to a 65mm S/C pulley. Second pulley failed internally after about 10,000 miles and in traffic, NO WATER PUMP TO GET HOME!!!!!!!!!!!
Heard a funny dragging sound and pulled over to be greeted by the pile of aluminum splinters and a fan belt thrown off. NOW how do I get to home 7 miles away ???????????
Being a standard american boy xx 71 YO xx, I went to McDonalds, bought a large coke and got about 30 cups of ICE in 30Oz. It took manysteps to pack motor with ice and fill overflow tank. FInally set off again, and coasted at each opportunity and stopped at a gas station to add more ice and water, putt putt Iam home pulling off the pulley. Going with a stock crank and 65mm as best choice thanks to ROB's suggestions.
So the last time I had to straighten the crank as it got bent on the end, this time Iam hoping that its not like that, last failure was at 6000 grabbing gears.
Hope it gets you watching your pulley, be aware. I mean 5 snapped bolts - there is torsional stress within that thing that a harmonic balancer should not have.....
Enjoy your weekend, fall is here, W
DY
https://www.crossfireforum.org/g/album/11317225 PHOTOS
Heard a funny dragging sound and pulled over to be greeted by the pile of aluminum splinters and a fan belt thrown off. NOW how do I get to home 7 miles away ???????????
Being a standard american boy xx 71 YO xx, I went to McDonalds, bought a large coke and got about 30 cups of ICE in 30Oz. It took manysteps to pack motor with ice and fill overflow tank. FInally set off again, and coasted at each opportunity and stopped at a gas station to add more ice and water, putt putt Iam home pulling off the pulley. Going with a stock crank and 65mm as best choice thanks to ROB's suggestions.
So the last time I had to straighten the crank as it got bent on the end, this time Iam hoping that its not like that, last failure was at 6000 grabbing gears.
Hope it gets you watching your pulley, be aware. I mean 5 snapped bolts - there is torsional stress within that thing that a harmonic balancer should not have.....
Enjoy your weekend, fall is here, W
DYhttps://www.crossfireforum.org/g/album/11317225 PHOTOS
Last edited by waldig; 10-12-2018 at 06:50 PM.
Senior Member
Re: @nd LET 185mm pulley exploded in traffic at 25MPH
I am working with Needswings to get all the parts to go to a 65mm S/C pulley. Second pulley failed internally after about 10,000 miles and in traffic, NO WATER PUMP TO GET HOME!!!!!!!!!!!
Heard a funny dragging sound and pulled over to be greeted by the pile of aluminum splinters and a fan belt thrown off. NOW how do I get to home 7 miles away ???????????
Being a standard american boy xx 71 YO xx, I went to McDonalds, bought a large coke and got about 30 cups of ICE in 30Oz. It took manysteps to pack motor with ice and fill overflow tank. FInally set off again, and coasted at each opportunity and stopped at a gas station to add more ice and water, putt putt Iam home pulling off the pulley. Going with a stock crank and 65mm as best choice thanks to ROB's suggestions.
So the last time I had to straighten the crank as it got bent on the end, this time Iam hoping that its not like that, last failure was at 6000 grabbing gears.
Hope it gets you watching your pulley, be aware. I mean 5 snapped bolts - there is torsional stress within that thing that a harmonic balancer should not have.....
Enjoy your weekend, fall is here, W DY
https://www.crossfireforum.org/g/album/11317225 PHOTOS
Heard a funny dragging sound and pulled over to be greeted by the pile of aluminum splinters and a fan belt thrown off. NOW how do I get to home 7 miles away ???????????
Being a standard american boy xx 71 YO xx, I went to McDonalds, bought a large coke and got about 30 cups of ICE in 30Oz. It took manysteps to pack motor with ice and fill overflow tank. FInally set off again, and coasted at each opportunity and stopped at a gas station to add more ice and water, putt putt Iam home pulling off the pulley. Going with a stock crank and 65mm as best choice thanks to ROB's suggestions.
So the last time I had to straighten the crank as it got bent on the end, this time Iam hoping that its not like that, last failure was at 6000 grabbing gears.
Hope it gets you watching your pulley, be aware. I mean 5 snapped bolts - there is torsional stress within that thing that a harmonic balancer should not have.....
Enjoy your weekend, fall is here, W
DYhttps://www.crossfireforum.org/g/album/11317225 PHOTOS
Re: @nd LET 185mm pulley exploded in traffic at 25MPH
the bolts are factory, the pulley is held ont by the crank bolt, it was tight, failure was internal, and it was the second one that failed, total milage is about 20,000 and Id guess that the failure is from the last 10,000 miles. Car has 29,000 miles on it now total.
I believe the internal mass some how wore out and or caused the failure, the internal bolts (3) were still there-bent. Iam going back to the stock crank and a 65 pulley, dont wanna have a third failure. Photos are for you to see the internal remains. Enjoy, Woody
I believe the internal mass some how wore out and or caused the failure, the internal bolts (3) were still there-bent. Iam going back to the stock crank and a 65 pulley, dont wanna have a third failure. Photos are for you to see the internal remains. Enjoy, Woody
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Re: @nd LET 185mm pulley exploded in traffic at 25MPH
Hello Woody,
Considering what Rob had told me in the past when considering upgrading the boost with the 178mm crank versus the 65mm I am suprised you went the 65mm. If you have the mods to support a 181 or 185 crank pulley I would wager you could hand the 62mm SC pulley if you still wanted that power.
DylanHunt
Considering what Rob had told me in the past when considering upgrading the boost with the 178mm crank versus the 65mm I am suprised you went the 65mm. If you have the mods to support a 181 or 185 crank pulley I would wager you could hand the 62mm SC pulley if you still wanted that power.
DylanHunt
Senior Member
Re: @nd LET 185mm pulley exploded in traffic at 25MPH
the bolts are factory, the pulley is held ont by the crank bolt, it was tight, failure was internal, and it was the second one that failed, total milage is about 20,000 and Id guess that the failure is from the last 10,000 miles. Car has 29,000 miles on it now total.
I believe the internal mass some how wore out and or caused the failure, the internal bolts (3) were still there-bent. Iam going back to the stock crank and a 65 pulley, dont wanna have a third failure. Photos are for you to see the internal remains. Enjoy, Woody
I believe the internal mass some how wore out and or caused the failure, the internal bolts (3) were still there-bent. Iam going back to the stock crank and a 65 pulley, dont wanna have a third failure. Photos are for you to see the internal remains. Enjoy, Woody
It looks a real mess, everything is destroyed.
Anyone with a similar part should pull it off or look at it carefully at least.
In my mind many of these aftermarket parts were made for a fast buck with little testing and sold with caveats that absolve the sellers of any future blame. The supercharger pulley fiascos were typical of this and my voiced concerns about these pulleys were poo pooed at the time, but the chickens came home to roost. The initial parts were poorly designed and made and I would not use any of them even now.
Re: @nd LET 185mm pulley exploded in traffic at 25MPH
Yes all pulley parts WERE aluminum and overall lighter than the stock steel pulley. I have no idea of the failure cause, there was no issues until I heard this noise while putting along in a line of traffic. I did not even go to auto-crossing this year so no high rpm operation for over 12 months.
I WENT WITH the 65mm pulley after consulting Rob at NEEDSWINGS, and he said that the 65mm pulley had better reliability than the 62mm pulley. It was on the strength of his advise that I decided not to go with the more aggressive pulley. I dont want to limit my driving range away from my house for fear that Ill need to tow it home, reliability is very high on my list of needs.
If you look back over my designs of the: oil separator, pulley saver, the super cooler, the dual cai and crossover manifold products in concert with Rob, concept, more power with no added stress. (Lower temp and pressure on the supercharger for instance).
Yes you should be aware of the car and monitor little issues and noises to be aware of its overall condition.
Enjoy, Woody
I WENT WITH the 65mm pulley after consulting Rob at NEEDSWINGS, and he said that the 65mm pulley had better reliability than the 62mm pulley. It was on the strength of his advise that I decided not to go with the more aggressive pulley. I dont want to limit my driving range away from my house for fear that Ill need to tow it home, reliability is very high on my list of needs.
If you look back over my designs of the: oil separator, pulley saver, the super cooler, the dual cai and crossover manifold products in concert with Rob, concept, more power with no added stress. (Lower temp and pressure on the supercharger for instance).
Yes you should be aware of the car and monitor little issues and noises to be aware of its overall condition.
Enjoy, Woody
Last edited by waldig; 10-23-2018 at 07:55 AM.
Senior Member
Re: @nd LET 185mm pulley exploded in traffic at 25MPH
[s
I was not referring to all after market items, I have the oil separator, SAI, and the coolant separation kit on my car. I was referring to the items that are stressed or cause extra stress, these would be the pulleys and some of the DIY pulley mods.
Practicaly everything breaks in the end for one reason or the other, the aim of the design should be to max out the time before it does fail. Ideally this time should be greater than the assembly in which it sits. You do not want a $1 part wrecking a $100 assembly.
The reason many of these parts were made of aluminum was because it was cheaper and easier to machine, but the reason given was because it was lighter, that was BS. Aluminum does not take stresses in these parts too well, threads become loose and stresses cause fatigue failures.
Yes all pulley parts WERE aluminum and overall lighter than the stock steel pulley. I have no idea of the failure cause, there was no issues until I heard this noise while putting along in a line of traffic. I did not even go to auto-crossing this year so no high rpm operation for over 12 months.
I WENT WITH the 65mm pulley after consulting Rob at NEEDSWINGS, and he said that the 65mm pulley had better reliability than the 62mm pulley. It was on the strength of his advise that I decided not to go with the more aggressive pulley. I dont want to limit my driving range away from my house for fear that Ill need to tow it home, reliability is very high on my list of needs.
If you look back over my designs of the: oil separator, pulley saver, the super cooler, the dual cai and crossover manifold products in concert with Rob, concept, more power with no added stress. (Lower temp and pressure on the supercharger for instance).
Yes you should be aware of the car and monitor little issues and noises to be aware of its overall condition.
Enjoy, Woody
I WENT WITH the 65mm pulley after consulting Rob at NEEDSWINGS, and he said that the 65mm pulley had better reliability than the 62mm pulley. It was on the strength of his advise that I decided not to go with the more aggressive pulley. I dont want to limit my driving range away from my house for fear that Ill need to tow it home, reliability is very high on my list of needs.
If you look back over my designs of the: oil separator, pulley saver, the super cooler, the dual cai and crossover manifold products in concert with Rob, concept, more power with no added stress. (Lower temp and pressure on the supercharger for instance).
Yes you should be aware of the car and monitor little issues and noises to be aware of its overall condition.
Enjoy, Woody
Practicaly everything breaks in the end for one reason or the other, the aim of the design should be to max out the time before it does fail. Ideally this time should be greater than the assembly in which it sits. You do not want a $1 part wrecking a $100 assembly.
The reason many of these parts were made of aluminum was because it was cheaper and easier to machine, but the reason given was because it was lighter, that was BS. Aluminum does not take stresses in these parts too well, threads become loose and stresses cause fatigue failures.
Last edited by onehundred80; 10-23-2018 at 10:10 AM.
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