3 replies to this topic

[jef]

Have LH with nissan 4 pot r32 on front and R31 rear brake and master is a VN V8 and also have VE vac pump , and brake dont feel good and peddle dont feel good , have bleed brakes heaps of times and vac pump madw a different, think to maybe change to a VE master hoping it will move more fluid,

[Bigfella237]

G'day jef,

 

When mixing parts from different brake systems it's really hard to diagnose problems. Could you elaborate on "don't feel good"?

 

Do you have a short, average or long pedal travel before anything happens?

When it does happen is the pedal firm or spongy?

Do the brakes apply progressively or do you get to a point where they come on hard all of a sudden?

Do you need to really stand on the pedal to get it to stop or are the brakes super sensitive?

Is there a noticeable difference between having booster vacuum and not?

 

What will probably be the best guide, assuming the front and rear calipers came from the same model car, is knowing what diameter the master cylinders were on those particular Nissans? If you can duplicate that diameter you should be fine design-wise, then you're just left with mechanical issues like pedal fulcrums, spongy flexible lines and bleeding.

Edited by Bigfella237, 11 April 2019 - 05:46 PM.

[ozyozyozy]

What big fella said, all of it.

[AbsynthHatch]

I think Jeff has used the same brake calipers front & rear as Rory used in the brake upgrade tutorial.
Rory uses a different master cylinder though but the same size as the VN.