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  #31  
Old 08-16-2015, 05:58 PM
lawnmowernick lawnmowernick is offline
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I know this is kinda a older thread but did anyone ever find a fix for the problem or are you still having trouble?
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  #32  
Old 08-16-2015, 07:01 PM
scottyfender scottyfender is offline
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Default Re: Brake issues in my v8 ranger

Still have my issues. I learned to live with it. I'd love to fix it but I haven't found the way to do it. I have 12 to
14 inch pounds of vacuum going to the booster.
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1988 XLT 2WD. 302 swap with an F303 cam, Holley 570 double pumper Street Avenger, T-5, 373 gears, Dream Beams and flip kit. Too much more to list here.
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  #33  
Old 08-17-2015, 05:56 AM
lawnmowernick lawnmowernick is offline
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I just did the swap about a month ago and have been just worried that I was missing something I guess it's one of the down sides to a 5.0 swap
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  #34  
Old 08-17-2015, 05:11 PM
terryduanemiller terryduanemiller is offline
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Quote:
Originally Posted by lawnmowernick View Post
I just did the swap about a month ago and have been just worried that I was missing something I guess it's one of the down sides to a 5.0 swap
did you do rear disc swap? Have you modified the OEM proportioning valve? Performance cam shaft? What is idle rpm?
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Last edited by terryduanemiller; 08-17-2015 at 05:14 PM.
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  #35  
Old 08-17-2015, 06:31 PM
scottyfender scottyfender is offline
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Default Re: Brake issues in my v8 ranger

I have rear drums. It's a 1988 and doesn't have the proportioning valve. Ford racing f303 cam. 800 ram idle.
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  #36  
Old 08-19-2015, 09:48 AM
terryduanemiller terryduanemiller is offline
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Quote:
Originally Posted by scottyfender View Post
I have rear drums. It's a 1988 and doesn't have the proportioning valve. Ford racing f303 cam. 800 ram idle.
ok, idle is to low. Performance cam can't idle at stock perimeters due to valve overlap, Raise the idle to 1000-1100 as a base. My 331 idles at 1400 my '72 roadrunner 340X idles at 1600
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  #37  
Old 08-19-2015, 10:03 AM
scottyfender scottyfender is offline
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Default Re: Brake issues in my v8 ranger

It's set at 1000 now. Is
this supposed to fix the soft brake pedal issue?
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  #38  
Old 08-19-2015, 10:27 AM
Vogenitz69 Vogenitz69 is offline
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Quote:
Originally Posted by lawnmowernick View Post
I just did the swap about a month ago and have been just worried that I was missing something I guess it's one of the down sides to a 5.0 swap
have you tried swapping the master to the explorer master?
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2000 Ford Ranger GT 5.0 V8 ~ Work-in-progress, 4" Spindle, 2" Shackle, 2" AAL, Bilstein 4600's, 7/8" Hellwig Rear Sway Bar, 33x10.5r15, Torque Monster Headers, M5R2 5 Speed, ARE Bed Cap
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  #39  
Old 08-19-2015, 01:37 PM
lawnmowernick lawnmowernick is offline
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I have a e303 and yes I did swap to the explorer rear and about the master cylinder I just put a new one on Saturday and it seemed to make the pedal feel better to a extent but not like it was

----------

Also had to numb my idle up to about 1000
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  #40  
Old 08-19-2015, 01:48 PM
Vogenitz69 Vogenitz69 is offline
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Quote:
Originally Posted by lawnmowernick View Post
I have a e303 and yes I did swap to the explorer rear and about the master cylinder I just put a new one on Saturday and it seemed to make the pedal feel better to a extent but not like it was ---------- Also had to numb my idle up to about 1000
ohh I forgot about the cam. I'm throwing a cam in mine but the idle is fairly close to stock, however the engine vacuum is increased so I imagine my brakes will stay stiff or be stiffer. Hopefully lol
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2000 Ford Ranger GT 5.0 V8 ~ Work-in-progress, 4" Spindle, 2" Shackle, 2" AAL, Bilstein 4600's, 7/8" Hellwig Rear Sway Bar, 33x10.5r15, Torque Monster Headers, M5R2 5 Speed, ARE Bed Cap
1987 Ford F-150 Lariat 5.0 V8 ~ "Heavy" Hauler, 2" AAL, Stock otherwise
2006 Honda Civic LX 1.6 Totaled
2011 Acura TSX 2.4 ~Daily Driver
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  #41  
Old 08-20-2015, 06:53 AM
terryduanemiller terryduanemiller is offline
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Quote:
Originally Posted by scottyfender View Post
It's set at 1000 now. Is this supposed to fix the soft brake pedal issue?
booster works off vacuum created by the engine, performance cams have valve overlap creating a decrease in vacuum that is created by constant air drawn in by engines rotating assembly. Has anyone modified the proportioning valve after rear disc swap?
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  #42  
Old 08-20-2015, 08:32 AM
lawnmowernick lawnmowernick is offline
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I have never modified the proportion valve
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  #43  
Old 08-20-2015, 03:19 PM
scottyfender scottyfender is offline
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Default Re: Brake issues in my v8 ranger

I have stock rear drums. 1988 had no proportioning valve.
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1988 XLT 2WD. 302 swap with an F303 cam, Holley 570 double pumper Street Avenger, T-5, 373 gears, Dream Beams and flip kit. Too much more to list here.
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  #44  
Old 08-21-2015, 06:07 AM
terryduanemiller terryduanemiller is offline
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We have ran into these kind of problems building classic, restomods, pro touring cars. You may need to go to a larger diameter booster. We normally use hydrboost setups on our builds. Lincolns and some mustangs use them. Utilizes power steering pump.

image-4050930554.jpg

I do not know if they are swappable.
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MY BUILD THREAD
1999 MAZDA 2500SE, 2.5L 4-clanger, 5 speed, Green n slow. Rangers as daily drivers since 1988.
ASE Certified Mechanic, Builder of Show Destroying Protouring and Classic cars..
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  #45  
Old 08-21-2015, 10:22 AM
scottyfender scottyfender is offline
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Default Re: Brake issues in my v8 ranger

Larger diameter booster? Or do you mean master cylinder?
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1988 XLT 2WD. 302 swap with an F303 cam, Holley 570 double pumper Street Avenger, T-5, 373 gears, Dream Beams and flip kit. Too much more to list here.
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