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PostPosted: Wed Jun 17, 2020 8:14 am 
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Joined: Sat Aug 06, 2011 12:52 pm
Posts: 26
BLinn wrote:
manny wrote:
a 1992 Ford Mustang with the 2.3 motor...in F production.

there's a 2.3L in FP?


There is also a 2.7 motor in FP, but I'm failing to see how this helps answer any of these questions.

FP----Prep.-----Weight-----Engine----Bore x-----Displ. cc/-----Block-----Head/PN-----Valves--------Carburetor. No. & Type----Wheelbase-----Track(F/R)
-------Level------(lbs)--------Type-----Stroke--------(ci)---------Mat’l-----& Mat’l-----IN & EX mm/-----------------------------------mm/(in.)-------mm/(in.)
------------------------------------------mm/(in.)----(nominal)--------------------------------(in.)

BMW------2-------2555-------6 Cyl.---3.35 x 3.19----164.7--------Iron------Alum-------(I) 1.58-----Fuel injection Throttle--------101.0---------(59.6/59.9)
325e/es--------* 2619--------OHC------------------------------------------------------------(E) 1.34-----Bore 2.17”
(84-87)---------** 2683

My advice on brakes is make sure there are no changes to the current rules first, no need to spend your money twice before even finishing the build IF the rules get changed. Here is the discussion in case you missed it. http://prodracing.com/prodcar/viewtopic.php?f=2&t=19453&start=0

Personal preference is a big deal if you want power brakes or not. If you are used to power brakes on race cars already and are building a medium heavy car (for the class) I would guess power to be your preference for pedal feel/force required.


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PostPosted: Wed Jun 17, 2020 8:24 am 
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Joined: Fri Dec 23, 2011 6:59 am
Posts: 1389
Location: Spring Hill, FL.
Hi Manny.
Glad you are considering Prod. Ford has many master cyl that will bolt up and supply plenty of fluid. Look for 1 in bore. Pretty sure I wound up with 95 F 150 with ABS MC.
I use the lever prop vavle as I change the settings often and like the definite , repeatable adjustment of which way the lever points. I use OTS parts as often as I can. I change my stock VW master cyl anually and rebuild the calipers at the same time .

I used the stock booster with some porting of the vacuum line to reduce the boost.
No boost was too heavy, full boost lacked feel .

You have the option to fit rear disc also . IMHO I would use GM metric calipers with the speedway carriers welded on. They work fine and race pads are plentiful. You will have some axle slap, kicking the pads back but carefull attention to the C clips and fresh axles can reduce this.
FWIW I put 311WHP through the little 7.5 in welded rear gear ( 2.53) in a 2700# race truck.( 160MPH) No issues. Dont drop the clutch and the nice light axle will live fine.

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Mike Ogren/Protech Racing, http://www.FWDracingguide.com http://www.ogren-engineering.com/ 352.428-8983 mogren@tampabay.rr.com


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PostPosted: Mon Jun 22, 2020 8:21 am 
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Joined: Sun Nov 08, 2009 12:58 pm
Posts: 480
Location: Denver CO
BLinn wrote:
manny wrote:
a 1992 Ford Mustang with the 2.3 motor...in F production.

there's a 2.3L in FP?


The TR3/4 is 2.2L and full prep. Valve size hurts it though...

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Bob A.


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PostPosted: Mon Jun 29, 2020 6:20 pm 
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Joined: Fri Dec 23, 2011 6:59 am
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Location: Spring Hill, FL.
Champcar ( and I )uses these at a fair price. Mention Champcar for discount..

http://www.lifeline-fire.com/

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Mike Ogren/Protech Racing, http://www.FWDracingguide.com http://www.ogren-engineering.com/ 352.428-8983 mogren@tampabay.rr.com


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PostPosted: Mon Aug 24, 2020 5:37 am 
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Joined: Wed Oct 09, 2013 9:52 am
Posts: 26
So I have decided to build the F production Mustang. In the GCR it states that it must use a dual master cylinder brake system, no problem. It also states that you can convert rear brake drums to disc BUT the rotor must be solid not vented. The problem with that is since the car is a 4 lug the only rotors available in 4 lug are vented, what do I do then? Thanks for all of your inputs which are valued to me


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PostPosted: Mon Aug 24, 2020 6:00 am 
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Joined: Mon Feb 29, 2016 9:12 am
Posts: 165
Location: Boston, Ma
I would be very surprised if someone doesn't have a suggestion for a rotor that is close enough from Ford or another manufacturer all together. Maybe rotate it 45 deg. and drill your own wheel stud pattern?

As a last resort, use these folks. http://www.colemanracing.com They will make a custom rotor to your specifications.
Wilwood recommended them.
I have one on order and their quoted turn around time is amazingly short.
For a quantity 1 order, their price seems amazingly low as well.



P.S. Put JB weld in the vents of the stock rotor that fits and see what the scrutineers say. :D

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Anthony Parker
NER 373024
E-Prod. Wanna-be


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PostPosted: Mon Aug 24, 2020 6:14 am 
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Joined: Sun Jan 23, 2011 4:54 am
Posts: 2090
1980s and 1990s Nissan Altima, Maxima, 240SX, and 300ZX all has various sizes of a solid rear rotor. they used either 4x114 or 5x114 depending on the model. (we put Mustang wheels on them all the time, and even used the Cobra brakes as upgrades on the Maxima)
If you want large, the 1988 or so 300ZX used the largest solid rotor of the bunch- they were about 1" larger than the early 90s Maxima, and some trim models came in a 4 lug version.
they all used a roughly 10mm thick rotor and the pads were interchangeable between all of them, so they used the same basic caliper design the whole time.

the center hub will be smaller than your Mustang I think, but that's easy enough to open up on a lathe- any small machine shop should be able to help with that.

Edit.. digging on rockauto.com, they have photos of damn near every part they sell, and some of them include dimensions.
This is a 1985 Nissan 300ZX rear rotor:
Image

They're a wallet-busting $16/ea.

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Matt Blehm
Houston Region
EP 1st Gen RX7
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PostPosted: Mon Aug 24, 2020 9:23 am 
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Joined: Fri Dec 23, 2011 6:59 am
Posts: 1389
Location: Spring Hill, FL.
I use SAAB rear rotors on my Toy that is 4 x 144.3 .
Matts', suggestion is valid also.


Also might consider changing to 5 bolt hubs before you go crazy building brakes. Off the shelf stuff fits. Explorer/4WD and Sport track parts bolt right up.

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Mike Ogren/Protech Racing, http://www.FWDracingguide.com http://www.ogren-engineering.com/ 352.428-8983 mogren@tampabay.rr.com


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PostPosted: Mon Aug 24, 2020 10:05 am 
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Joined: Tue Oct 27, 2009 6:39 pm
Posts: 476
Mk1 / Mk2 VW front rotors come in vented and non-vented.
They are 4x100mm, but of course as noted you could use any 4 bolt rotor and redrill.

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Chris Schaafsma


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PostPosted: Mon Aug 24, 2020 4:56 pm 
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Joined: Tue Dec 31, 2013 10:40 am
Posts: 468
Location: Huntsville, AL
Ford Focus SVT, Focus regular, and Fiesta ST all have rear disks. They are solid disks and already drilled for a 4x108 pattern.

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Brett W
Huntsville, AL


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