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RB25 box behind FJ

March 18 2015 at 8:26 PM
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Dan  (Login angryFJ)
from IP address 101.171.85.84

 
Hi all
im having trouble getting a decent clutch pedal in my datto 1600.

Anyone done this conversion? Let me know what release bearing you used.

Cheers

 
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Anonymous
(no login)
27.32.74.91

Re: RB25 box behind FJ

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March 24 2015, 10:54 AM 

is your question asking if you use the fj release bearing or the rb25 release bearing?

if so use the rb25 release bearing.

Are you doing the mods to the box yourself?

 
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Anonymous
(Login angryFJ)
1.127.48.153

Re: RB25 box behind FJ

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April 1 2015, 2:29 AM 

Ive already modified the box to suit the engine. Car is finished.

I checked with exedy, all 240mm hdb clutch kits for RB25 or FJ20 are the same part numbers. I.e same release bearing.

Getting a clutch pedal at the end of pedal travel. System is definitely bled, only other mod is a Nismo 13/16" slave from the standard nissan 3/4".

 
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jon
(Login fj20det1600)
49.181.143.60

Re: RB25 box behind FJ

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May 22 2015, 11:36 AM 

And you cant adjust your lever?

 
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Mike
(Login Type-X)
180.7.60.125

Re: RB25 box behind FJ

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June 7 2015, 11:03 AM 

What mods were necessary?

I bolted an RB20 box to an FJ with no mods other than leaving out a bolt and a dowel. I'm wondering what would make the RB25 different.

 
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dave
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165.228.199.169

Re: RB25 box behind FJ

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June 11 2015, 5:09 PM 

correct me if im wrong, but if the slave cylinder bore size has been increased would not the master cylinder size need to be increase to maintain the same hydraulic advantage? could be the reason for only having a pedal at the very end of the stroke you may be exhausting the master before the slave is moved through a complete movement

 
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Webby
(no login)
120.155.81.241

Re: RB25 box behind FJ

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September 9 2015, 10:59 PM 

I've just done this same conversion but I had my fj20 bell housing modified to fit to the RB box. Machined out the center hole of the front housing to fit over the main RB gearbox bearing...
I had the same problem with the clutch. There are 2 different length thrust bearing carriers. Short 24mm and a long 27mm (approx)
You need to use the longer carrier. I learnt this the hard way!!
I believe the RB20 and Fj20 slave cylinder is the same so won't make a difference...
Hope this helps..

 
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