s10 spindles w/dual piston calipers

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s10 spindles w/dual piston calipers

Postby azbigal » Fri Mar 06, 2009 6:29 pm

Hey Folks! It is my understanding that 99 and newer S10 Blazer 2wd spindles with dual pistion calipers is a bolt on upgrade for older models S10 pickups. So following that logic we should be able to use the same on our H-bodies with of course ball joint adapters. Has any one tried this set up?
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Re: s10 spindles w/dual piston calipers

Postby gotmud7 » Sat Mar 07, 2009 12:42 am

I beleive you are right. I hear the spindle is different for the single vs dual piston. You have to swap out everything.
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Re: s10 spindles w/dual piston calipers

Postby cosvega76 » Sat Mar 07, 2009 8:45 am

I even went one step further and made an adapter to put C4 Corvette calipers on the dual-piston Blazer spindles. While it would work with Bob's ball joint adapters, I went ahead and adapted S-10 ball joints as well.

Chuck
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Re: s10 spindles w/dual piston calipers

Postby 73astregt » Sat Mar 07, 2009 2:48 pm

i think that tim mccabe did the dual piston upgrade to kirmit.
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Re: s10 spindles w/dual piston calipers

Postby azbigal » Sun Mar 08, 2009 9:02 pm

Thats what I am talking about. Did you have any clearance issues with any part of this set up ie: caliper rubbing rim (15") or hitting control arms at full left or right. Also what master cylinder and preportioning valve are ypu using?
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Re: s10 spindles w/dual piston calipers

Postby cosvega76 » Mon Mar 09, 2009 7:26 am

If you use the S-10 rotors and calipers, you should have no trouble fitting 15" wheels. I'm using the Corvette calipers and 12" rotors, so it would need a minimum of a 16" wheel. Mine are 17s. Currently, I have a master cylinder with a 1" bore, which makes the pedal pretty hard. I have a 15/16" bore master yet to be installed, which should ease up the pedal pressure required. I use an adjustable proportioning valve for the rear brakes.

Chuck
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Re: s10 spindles w/dual piston calipers

Postby megavega » Mon Mar 09, 2009 12:38 pm

Chuck, Interesting, I wonder if the offset is differnt then the normal s10 rotor, meaning, if the mounting point/hub width is the same track width??, the hat of the rotor looks from the pics looks to be thinner?? I guess youd need to have one of each assembly to see if there is any differance. I ask because I need to narrow the track width up front, so I am either going to have the tubular a arms narrowed, or start machining the rotor hat, wheel flange inside rim. I need about 1 inch so if needed so I will take .150-.200" here and there off various items to get close.

also would you mind listing the caliper and rotor number you used, looks like a nice upgrade for my project, have 17 inch rims so its a shoe in.
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Re: s10 spindles w/dual piston calipers

Postby cosvega76 » Mon Mar 09, 2009 4:18 pm

I am still using the S-10 hub bearing, so there would be no change there. I am using C4 Corvette rear rotors (Raybestos 56996) and standard (non-HD) front calipers (Raybestos FRC4126, left; FRC4125, right). The calipers do not come with caliper brackets, so check with a Corvette salvage yard for availability - they are not available new anymore.

I fabbed up my own caliper adapter brackets out of some 3/8" steel to fit.

Why do you need to narrow up the track? I find with mine that there is little enough room for tires to steer as it is. I have 17x7 wheels with 215/40-17s and have trouble contacting the sway bar at full lock.

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Re: s10 spindles w/dual piston calipers

Postby megavega » Mon Mar 09, 2009 5:34 pm

thanx Chuck.


I need to narrow up the track because my car sits so low it wont clear the rims/tires and there is not a differnt offset available with rim I have on the car to go the right way, the combo will hit the front edge of the fender in both below the body line and at the center fender lip edge when you turn the wheel. I would have to section the fenderlip in 2 differnt places to clear, not the look I would want on the car. I do have plenty of room to do this, I have already checked it at full turn both ways and have more then enough clearance to the frame rail behind wheel and to the front. My car doesnt have any inner fender wells, so only the frame rail. I know...... I could just simply raise the car s ride height up.....lol, but thats not how to solve the problem when your building a set plan/design of the car . A pro touring car has to sit in the weeds and still drive down the road.
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Re: s10 spindles w/dual piston calipers

Postby cosvega76 » Mon Mar 09, 2009 6:44 pm

What size tires are you using? I used to run 225/50-15s, then 195/60-15s on the front of mine. I used 15x7 Centerlines with 4-7/8" backspacing, with spacers to bring it back to about 4-1/2" and clear the outer tie rod ends. Really had no clearance issues with the 195/60s. I still have the wheels.

Chuck
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Re: s10 spindles w/dual piston calipers

Postby megavega » Mon Mar 09, 2009 7:45 pm

I have 17x7 with 4 inch back space, 235/45/17, but i also have 215/45/17, not too much clearance gain in the 2 tire sizes, need the wheels to go inward a good 5/8"-7/8" to be where I need them. You can see the car in project journal section-"pro touring vega". I need the front fender lips have to drop down 3 inchs to be 1/2 inch lower then the rear are currently sitting at desired ride height. (Front fender lips are needing to be down over the edge of the rim).Its setting up in the front in the pics because until I tuck the wheels in I cant drop the front down unless I dont want the wheels to turn with the fenders on. For rears I have 17x8 with 245/45/17 squeezed in under the lips, this helped from the use of the s10 rear end being narrower.

if the wheels were made in a 4.5 -4.75 backspace this would all be done........lol, always a challenge to build a hot rod. :bang:
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Re: s10 spindles w/dual piston calipers

Postby chevyart » Mon Mar 09, 2009 9:53 pm

i feel like a caveman with these h-body cars. im just putting monza spindles and rotors on my 75 vega and you guys are fabricating all these modern brake parts to our beloved cars. i tip my hat to all you guys out there doing these great updates. keep up the good work. these h-bodies are becoming more and more well known thanks to you guys sincerely chevy art
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Re: s10 spindles w/dual piston calipers

Postby cosvega76 » Tue Mar 10, 2009 7:58 am

In my experience, you need at least a 4-1/2" backspace on a 7" wide wheel. Does the wheel manufacturer offer - or can custom-make - that backspace?

Also, if I may, I think you are trying to stuff too large a tire in the front: a 235/45-17 measures around a 25.3" diameter (plus, I've never been able to comfortably fit anything larger than a 225 width tire on mine), and the 215/45-17 measures 24.6" in diameter. The 215/40-17s I'm using are only 23.8" in diameter. I've found that keeping diameter 24" or under works best, unless you are using skinny drag tires. Keep in mind that these cars came with narrow A78-13 and B70-13 tires from the factory - which were 23.5-23.8" in diameter.

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Re: s10 spindles w/dual piston calipers

Postby TimMcCabe » Thu Mar 19, 2009 9:00 am

The duel piston set up is a direct bolt on if you already have the S10 spindles installed. The 2 spindles are dimensionally the same.

I was able to reuse the same brake flex hose from the single piston S10 set up I had before and I have no clearance issues using the 15" early '70's Z-28 rims.

I've been using a Honda Prelude power brake master cylinder and booster for years, there is no difference in pedal feel between the single and duel piston set up, but the duel piston stops the vehicle much better :)

Cheers,

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Re: s10 spindles w/dual piston calipers

Postby waybad » Thu Mar 19, 2009 9:30 am

Hey Tim,
Will these calipers fit on any s-10 spindles or just the 99 and up? Thanks TC
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