Which Strange master cylinder in a 4-gen F-body

Rick.H · 10-18-2017, 10:26 AM

Have a -97 Formula with strange 4 piston calipers front + rear.
Strange recommend the master cylinder with 1.125 diameter bore.

Anybody with experience or is 1.032 master cylinder better choice.

I might get very strong right leg.

Tom Goldman · 10-18-2017, 12:35 PM

A 1.062 diameter Wilwood will work the best for the Fbody with 4 wheel discs and a 6 to 1 pedal ratio .
The 1.032 will work, but you will have a fairly soft ,deep pedal.
The 1.125 will require a strong leg with a 6 to 1 pedal to get much more than 900 # pressure . .....It will work with a 7 to 1 ratio , but the pushrod geometry is not so good.
Regardless of which you choose be sure to use some sort of retainer for the push rod beside the rubber o ring.

chris ok · 10-22-2017, 02:43 PM

Im working with aerospace and the tech has been great help. Most polite informative guys. Im at 6-1 and have 800 psi. Changing ratio to 7-1 as recommended.
Hoping for close to 1000 psi.

GTX JOHN · 10-27-2017, 07:49 PM

The Mopar master cylinders we have encountered have different proportions
from front to back depending on part # and bore size plus application
(IE 61/39 or 69/31).

Is that not important?

10-18-2017, 10:26 AM	#1
Rick.H Junior Member Join Date: Nov 2015 Posts: 11 Likes: 0 Liked 0 Times in 0 Posts	Which Strange master cylinder in a 4-gen F-body Have a -97 Formula with strange 4 piston calipers front + rear. Strange recommend the master cylinder with 1.125 diameter bore. Anybody with experience or is 1.032 master cylinder better choice. I might get very strong right leg.

10-18-2017, 12:35 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,476 Likes: 889 Liked 881 Times in 236 Posts	Re: Which Strange master cylinder in a 4-gen F-body A 1.062 diameter Wilwood will work the best for the Fbody with 4 wheel discs and a 6 to 1 pedal ratio . The 1.032 will work, but you will have a fairly soft ,deep pedal. The 1.125 will require a strong leg with a 6 to 1 pedal to get much more than 900 # pressure . .....It will work with a 7 to 1 ratio , but the pushrod geometry is not so good. Regardless of which you choose be sure to use some sort of retainer for the push rod beside the rubber o ring. __________________ Tom Goldman 1500 SG , 1506 STK

10-22-2017, 02:43 PM	#3
chris ok Senior Member Join Date: Jul 2002 Location: Long Island, New york Posts: 592 Likes: 131 Liked 46 Times in 29 Posts	Re: Which Strange master cylinder in a 4-gen F-body Im working with aerospace and the tech has been great help. Most polite informative guys. Im at 6-1 and have 800 psi. Changing ratio to 7-1 as recommended. Hoping for close to 1000 psi. Last edited by chris ok; 10-22-2017 at 11:42 PM. Reason: Math

10-27-2017, 07:49 PM	#4
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,483 Times in 697 Posts	Re: Which Strange master cylinder in a 4-gen F-body The Mopar master cylinders we have encountered have different proportions from front to back depending on part # and bore size plus application (IE 61/39 or 69/31). Is that not important? __________________ John Irving 741 Stock 741 Super Stock