40 series general tech and classifieds (1 Viewer)

[wngrog]

Booster condition?

What type master is it?

Proportion valve?

 

[jynx]

Booster appears to be fine, not sure how to test it.

Master is a dual circuit, guessing oe(ish) for a 78 2F 40.

Proportioning valve: yes it has one, as far as what kind, not 100% sure. I'll have to have a look.

Perhaps the rears are over-riding the fronts? But even if that was so, i would think that sitting still with the peddle mashed, it wouldnt matter, would it? Shouldn't everything be locked down under that scenario? Never dealt with a rear disc convo, so dont know much about how to judge whats happening.

 

[wngrog]

Your master and prop valve are designed to send more juice to the rear because you are supposed to have drums that take more juice to operate.

So

You need a City Racer proportion valve to dial out the pressure to the rear.

 

[jynx]

Dual circuit master

Looks like I already have a prop valavr in-line. Looks just like the one on city racer's site

Do they go bad? Perhaps I need a new one, or maybe I need an adjustable one for the rear discs since that prop valve would have been for rear drums.

Any recommendations?

 

[wngrog]

That is a disc/drum master. Sends more pressure to the rear. The adjustable dial type proportion valve is what I used from City Racer

 

[jynx]

Looks like thats no longer an option.

 

[wngrog]

It’s out there. I know Wilwood makes one. You can adapt the ends to SAE

 

[offr0adlim0]

You might want to take care of this while you’re in there.

 

[jynx]

You might want to take care of this while you’re in there. View attachment 2095160

Ok, I'm gonna plead ignorance as I thought it was just a union. No idea why it would be there (as has been the case with a number of things, example the t-case e-brake works great but I found a line lock in the rear circuit...) but didnt realize that it was something that needed attention.

 

[wngrog]

It’s a common way people fix brake lines. Instead of doing it right and bending up a full new line they hack up the OEM line and add those junctions to mate them. It’s often a source of a leak.

 

[jynx]

Gotcha, well I need to give @Rainman a buzz about some other lines, so I will just see about getting the correct replacement while I'm at it.

 

[offr0adlim0]

Ok, I'm gonna plead ignorance as I thought it was just a union. No idea why it would be there (as has been the case with a number of things, example the t-case e-brake works great but I found a line lock in the rear circuit...) but didnt realize that it was something that needed attention.

That is a compression union and is not capable of holding up to the pressure of brake hydraulics. A union with a double flare on both ends will be fine but squeezing a brass olive around a steel line is asking for trouble. Works great for fuel not so much for brakes.

 

[Bodean]

Just put a non ABS 80 series Master Cyl. on it. Swapped to disc on my buggy from drums and put a 4 runner M/C on it and it works great. Either the non ABS 4 runner or 80 series should work. It's the 1" bore M/C.

 

[Bodean]

I think this is the one I bought from Rock Auto

 

[Bama4door]

Just put a non ABS 80 series Master Cyl. on it. Swapped to disc on my buggy from drums and put a 4 runner M/C on it and it works great. Either the non ABS 4 runner or 80 series should work. It's the 1" bore M/C.

This is ideal for front disc and rear drum setup on a 40?

 

[Bodean]

This is ideal for front disc and rear drum setup on a 40?

For a rear disc brake swap on a 40 is what I've seen it used for.

 

[wngrog]

You should

This is ideal for front disc and rear drum setup on a 40?

It’s the same one I run on my 40 and 55 and they both have disc/drum

I’m not 100 sure it’s the best for my application versus a master designed for rear drums but the brakes on both are good.

My biggest gains came each time I installed a new City Racer booster.

 

[wngrog]

Red sent me this from Madison today. Looks like Lenny got a forty

 

[offr0adlim0]

Red sent me this from Madison today. Looks like Lenny got a forty

View attachment 2098332

I’ve seen that one up close, it is actually a pretty decent 40 that has some mods that are visually wrong. She should have gotten a pic of the matching diamond plate front bumper.

 

[wngrog]

I’ve seen that one up close, it is actually a pretty decent 40 that has some mods that are visually wrong. She should have gotten a pic of the matching diamond plate front bumper.

Her pic was grainy of the front. Can’t tell on the diamond plate