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Most Online1,229 Jan 21st, 2020
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Joined: Jul 2019
Posts: 33
'Bolter
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I'm green when it comes to big bolt trucks and am looking to put disc brakes on my 1930 1 1/2 ton. Am I correct in my initial reading that this thread covers later models? If so, can anyone point me in the right direction? Thanks.
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Joined: Jul 2014
Posts: 526
'Bolter
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After reading this & other disc brake conversions my brain hurts & am now more confused then ever how to do a front axle 1 ton conversion for a 1 ton panel. Unless someone has a condensed version of how to do it??? Or is there a way to change it over to a 6 bolt disc brake set up??? Mean while I figured I'd google it & see what popped up. Anybody heard of these folks or have used their kits???? https://www.tsmmfg.net/chevy-gmc-8-lug-truck-complete-front-disc-brake-kit-1847.html Thanks......joe I also am interested to know if anyone has any experience with the website Joe refers to. I looked at the website and it appears that they are using 78-85 Monte Carlo calipers rather than pickup calipers. I wonder it those could handle the heat dissapation required of a bigger vehicle like my nearly always loaded 8800lb 1-ton,
1951 3800 1-ton'62 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.In the DITY Gallery
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Joined: Sep 2010
Posts: 2,001
back yard wrench turner
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[quote] I looked at the website and it appears that they are using 78-85 Monte Carlo calipers rather than pickup calipers. I wonder it those could handle the heat dissapation required of a bigger vehicle like my nearly always loaded 8800lb 1-ton, It probably has to do with size. I used C1500 calipers and had to do some grinding to make 16 inch wheels fit.
Wayne When I die, I hope she doesn't sell everything for what I told her I paid for it! 1938 1-Ton Farm Truck-30- Stovebolt Gallery Forums
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Joined: May 2017
Posts: 349
'Bolter
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Most of the heat capacity is in the rotor/drum. The lining is a relatively good insulator compared to the iron of the rotor, even semi and full metallic linings. The swept area of the rotor, that area the width of the pad x the circumference of the rotor, is one of the main determining factors in brake rating. The size of the caliper determines the clamping force and thus the deceleration rate that can be applied to a given gross weight. If you can clamp tighter, you can stop faster. If you have big rotors, you have more time available before overheating and you have more leverage against the turning wheel.
Mac :{)
1962 K10 short step side, much modified for rally 1969 T50 fire truck, almost nos, needs a few things
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Joined: Jul 2014
Posts: 526
'Bolter
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Sweepleader, I have no doubt that what you say is correct; It's just that I have brake heating problems on the front as it is and boiling brake fluid makes the brakes really erratic. Think of repeated stops from 60 mph for the lights on Bangerter Hiway in Salt Lake City. I need to do something soon as the drums are pretty thin. Rears are OK.
1951 3800 1-ton'62 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.In the DITY Gallery
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Joined: May 2017
Posts: 349
'Bolter
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I did not mean that you should not use discs, only that the caliper does not determine the heat capacity of the brake, the rotor does for the most part. If the drums are not doing it for you, for sure, switch to discs. I put discs on my '62 K10 and they are great. I was able to swap from a '72 K10, they are easily 3x the brakes as far as heat goes. When a disc heats up it expands toward the caliper, not away from the shoes as a drum does.
Mac :{)
1962 K10 short step side, much modified for rally 1969 T50 fire truck, almost nos, needs a few things
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Joined: Nov 2018
Posts: 3
New Guy
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I also am interested to know if anyone has any experience with the website Joe refers to. I looked at the website and it appears that they are using 78-85 Monte Carlo calipers rather than pickup calipers. I wonder it those could handle the heat dissapation required of a bigger vehicle like my nearly always loaded 8800lb 1-ton,[/quote]
Good afternoon,
The calipers we use for this kit, are actually from a K20.
TSMMFG-Disk Brake Conversion
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Joined: May 2005
Posts: 9,189
OP
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Reminder,
This thread is about using P-30 parts to adapt disc brakes.
It is not a catch all thread for any sort of disc brake conversion. If it were it'd be less helpful and very hard to search and make sense of. (not that it's easy keeping you head wrapped around just the P-30 details and possibilities)
Please start a new thread or find an existing thread to discuss various other disc brake kits or conversions.
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