Do you already have your new front axle for the new build? Have you considered Toyota outers at all? You can run them on a D44 center if you like, then you get 4 piston calipers and 45 degree steering with RCV's.
Nope. I won't be dealing with axles until after April. I've got shelves of parts ready to go in before I get to the SAS.
Actually, I started talking to the tech at the dealership about this. He's building a 4-Runner now to replace his truggy and that kinda got us started on the subject. Previously, I hadn't but now its something I think I'll look into. I have a meeting with the shop on the 2nd to discuss the SAS. I need to do more research on this as it may be an option.
I started looking at the ProRock 44 with the 60 outers the other day, but I think that's just overkill.
I'm not sure that the Toy outers wouldn't also be overkill.
Anyway, I'm still going to look into it this weekend.
After you posted all this stuff i started wondering why my setup just worked considering i just randomly put mine together. The Mighty Max has a 15/16" bore BMC, I have the 4 Runner brake upgrade AND Montero rear discs. So i am running twice the calipers and three times the amount of pistons this BMC was designed for BUT as it turns out it's nearly exactly the same setup as the 4 Runner has stock. So i just got lucky that all my mismatched parts just happened to be correct for my application.
Sometimes that happens. Usually, I'm not that lucky.
I haven't looked at what the Sport had stock so don't know how far off I am now from OEM. But, like I said, I think my issues stem more from part problems.
I don't suppose you know about the Dodge 1500 BMC crossover? On PA_JERO's rig we are going to run a late 90's early 00's BMC off of the 1500 to power his Wagoneer brakes. He's running Wagoneer front calipers and Montero Sport rears, I imagine we won't be as lucky with this one and will probably go through a series of trials to get it working correctly.
The Dodge BMC is huge and just happens to bolt up to a Mitsu power booster, and Napa has adapter fittings for standard to metric brake lines. I can't remember the bore size for the dodge but we did physically bolt one up to a Montero in the junkyard, there are a few different types though so we had to try a few different Dodges before we found the correct one.
The Wagoneer brakes are D52s, and I think either the 1/2 ton 2.94" piston or the 3/4 ton 3.375" piston. Sport big rears or small rears?
Nope, I didn't know any of the Dodge BMCs would bolt up although I'm not surprised. I'm starting to figure out that the Mitsu style isn't as unique as I thought it was. Make/model/engine did it come off of?
Uh, how huge is 'huge'? There is a careful balancing act between volume and pressure. BMC has to move enough volume to move the caliper pistons, but still has to make enough pressure to generate the clamping force to stop the vehicle.
I ran some appropriate changes through Bill's calculator. Which Wagoneer calipers? The 1/2 ton 2.94" or the 3/4 ton 3.375"? 'Cause that makes a big difference.
Take a look at the PDF in my last post. All I did was change the front piston diameter to 3.375" and the math worked out to needing a 1 5/16" - just like '3.375 = 79 Chevy 1 ton (Dana 60) ................................. Brake Cylinder Bore Size:1 1/4" or 1 5/16"' in "Info - Calipers".
Then I JUST changed to the D52 2.94" caliper and I went from needing 1,035 PSI to 1,318 PSI.
Front
Required Brake Torque (front) (in. lbs) 43,596
Calculate Brake Torque (front) (in. lbs.) 34,243
Rear
Required Brake Torque (rear) (in. lbs) 10,404
Calculate Brake Torque (rear) (in. lbs.) 12,302
As you can see, there's not even remotely close to enough brake torque. It ended up short almost 25%. Now here are the numbers with a 1 1/8" BMC ...
Front
Required Brake Torque (front) (in. lbs) 43,596
Calculate Brake Torque (front) (in. lbs.) 46,616
Rear
Required Brake Torque (rear) (in. lbs) 10,404
Calculate Brake Torque (rear) (in. lbs.) 16,747
1 1/16" probably wouldn't have enough volume for the calipers and larger than 1 1/8" won't produce enough pressure. Annnndddd ... '2.934 = 79 Chevy 1/2ton ............................................... Brake Cylinder Bore Size:
1 1/8"' Surprise, surprise.
Edward
