How can I put 13" rotors on a non-2" drop spindle? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

funkytechmonkey · 05-19-2011, 07:42 PM

I would like to put a 13" rotor on my truck but the only choice I have is to run a cpp 2" drop spindle. I do not want to drop the truck 2". Any ideas?

Does anyone make an aftermarket spindle that you can add bigger rotors?

87chevy.com · 05-20-2011, 12:01 AM

talk to way2low, he should be able to hook you up with modified stock spindles.
clint

gringoloco · 05-20-2011, 01:15 AM

There is no kit I am aware of, but knowing a few things about GM's parts bin interchange will allow a pretty easy upgrade. GMC and Chevy trucks, starting in 1981, offered a light duty (LD) brake setup on half ton trucks. This was simply a B-body (Caprice, Impala, Roadmaster, Fleetwood) rotor and caliper setup on a car-sized spindle. The rotors measure 1" thick, as opposed to the heavy duty (HD) truck rotors, which are 1.25".

Check out this website. You can use his hubs (or mill your own out of rotors) and brackets to bolt C4 HD (13") rotors and C5 calipers or brackets to bolt C5 (12.8") rotors and C5 calipers to a stock (or dropped) LIGHT DUTY truck spindle. Possibly save a little money by sourcing a pair of 98-02 F-body (Camaro/Firebird) front calipers, which mount exactly the same as the C5 Corvette calipers, just are cast by a different process and don't say 'Corvette' on them.

For gee-wiz sake- if you're using the LD spindle, there is also an easy way to convert to 5x4.75 bolt pattern, as the 82-92 Camaro 1LE brake upgrade was just the B-body spindle with the big car rotor drilled with the small car bolt pattern...

Back to your original question- you're looking at:

Hubs - $140
Brackets - $75
Calipers(C5) - $216 ($108 each, w/ brackets, at rockauto.com)
Calipers(F-body) - $120 ($60 each at rockauto.com) *will still need C5 caliper abutment brackets 12455799, $50 each*
Rotors(C5) - $84 ($42 each at rockauto.com)
Rotors(C4) - $100 ($50 each at rocakauto.com)

$515 using all C5 parts and $530 with C4 rotors. This is assuming you have the LD spindles already and using all new or reman parts. Plenty could be saved by picking up gently used pieces on eBay, forums, Craigslist or at the pick-and-pull, or with better deals than rockauto offers on new stuff...

SCOTI · 05-20-2011, 08:48 AM

KORE-3 has a C10 kit that works w/stock or dropped spindles (you modify your own spindles).

05-19-2011, 07:42 PM	#1
funkytechmonkey Registered User Join Date: Jan 2011 Location: Lawrenceville, GA Posts: 1,080	How can I put 13" rotors on a non-2" drop spindle? I would like to put a 13" rotor on my truck but the only choice I have is to run a cpp 2" drop spindle. I do not want to drop the truck 2". Any ideas? Does anyone make an aftermarket spindle that you can add bigger rotors? __________________ Never wrenched a day in my life and now... Im doing a frame off restoration on a 1968 C10 with a Porterbuilt Dropmember, Acuair E-Level kit, Boyd Welds Gas tank and mild c-notch. Click here to view my build

05-20-2011, 12:01 AM	#2
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,257	Re: How can I put 13" rotors on a non-2" drop spindle? talk to way2low, he should be able to hook you up with modified stock spindles. clint __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

05-20-2011, 01:15 AM	#3
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,920	Re: How can I put 13" rotors on a non-2" drop spindle? There is no kit I am aware of, but knowing a few things about GM's parts bin interchange will allow a pretty easy upgrade. GMC and Chevy trucks, starting in 1981, offered a light duty (LD) brake setup on half ton trucks. This was simply a B-body (Caprice, Impala, Roadmaster, Fleetwood) rotor and caliper setup on a car-sized spindle. The rotors measure 1" thick, as opposed to the heavy duty (HD) truck rotors, which are 1.25". Check out this website. You can use his hubs (or mill your own out of rotors) and brackets to bolt C4 HD (13") rotors and C5 calipers or brackets to bolt C5 (12.8") rotors and C5 calipers to a stock (or dropped) LIGHT DUTY truck spindle. Possibly save a little money by sourcing a pair of 98-02 F-body (Camaro/Firebird) front calipers, which mount exactly the same as the C5 Corvette calipers, just are cast by a different process and don't say 'Corvette' on them. For gee-wiz sake- if you're using the LD spindle, there is also an easy way to convert to 5x4.75 bolt pattern, as the 82-92 Camaro 1LE brake upgrade was just the B-body spindle with the big car rotor drilled with the small car bolt pattern... Back to your original question- you're looking at: Hubs - $140 Brackets - $75 Calipers(C5) - $216 ($108 each, w/ brackets, at rockauto.com) Calipers(F-body) - $120 ($60 each at rockauto.com) will still need C5 caliper abutment brackets 12455799, $50 each Rotors(C5) - $84 ($42 each at rockauto.com) Rotors(C4) - $100 ($50 each at rocakauto.com) $515 using all C5 parts and $530 with C4 rotors. This is assuming you have the LD spindles already and using all new or reman parts. Plenty could be saved by picking up gently used pieces on eBay, forums, Craigslist or at the pick-and-pull, or with better deals than rockauto offers on new stuff... __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

05-20-2011, 08:48 AM	#4
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,934	Re: How can I put 13" rotors on a non-2" drop spindle? KORE-3 has a C10 kit that works w/stock or dropped spindles (you modify your own spindles). __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.