Brake Proportioning valve, Toyota threads?

[Jonny Rochester]

I am going to get a adjustable brake proportioning valve to replace the Toyota one, in the standard position. Just having trouble buying one that comes with the right threads ready to bolt up. Toyota brake threads are M10x1.

The Wilwood one is 1/8-27 NPT, not sure if the addapters in the kit are the right ones.

Tilton sell 2 models, one comes with M10x1 threads, but the taper at the base is not the right one for regular Toyota double flare pipes. (I think).

What is the common solution?

[takai]

The Wilwood one comes with 10x1 adaptors.
The Tilton one in 10x1 has a 74deg overall flare, i.e. 37deg angle which is the same as Toyota double flare pipes.

[Jonny Rochester]

I picked up the Tilton one and had a look in it (the metric M10x1 version). The taper in it was concave rather than convex. This is my problem. I could just screw my brake lines in it and it may seal, but it does not seam right to me.

A Toyota brake tube has a double flare. Look at the threads on a Toyota brake thingy, such as a master cylinder. There seams to be a brass or steel ferel in it creating the convex taper. The Tilton item does not have this.

Looking at Tilton and Earls catlogs, I can not easily see the convex to concave M10x1 addapter. What do people do.?

[Dropbear]

get some new lines made up with the fittings and flares you need

[takai]

I picked up the Tilton one and had a look in it (the metric M10x1 version). The taper in it was concave rather than convex. This is my problem. I could just screw my brake lines in it and it may seal, but it does not seam right to me.

A Toyota brake tube has a double flare. Look at the threads on a Toyota brake thingy, such as a master cylinder. There seams to be a brass or steel ferel in it creating the convex taper. The Tilton item does not have this.

Looking at Tilton and Earls catlogs, I can not easily see the convex to concave M10x1 addapter. What do people do.?

Tilton 10x1 one i had was a convex flare. Im currently running a Wilwood one which came with the M10x1 convex converters as you can see here:

[Jonny Rochester]

OK thanks. So if I just buy the Wilwood one, the converts it comes with are M10x1?

[takai]

Mine did, i just picked it up off the shelf.
As always though YMMV.

[Jonny Rochester]

I just looked a Wilwood valve. The threads in the valve itself are 1/8" -27 NPT. The converters it comes with are 3/8" -24 inverted, for a inverted 3/8" flare nut. (Not M10x1, even tho it does look close. Maybe someone has forced the wrong thread, check).

The Tilton valve comes with either M10x1 thread with concave taper (not right for Toyota inverted flare nuts). Or the Tilton one comes with AN3 threads.

The neatest way for retaining Toyota pipes and flare nuts, is to use the Tilton AN3 valve. Then use addapters from EARLS Part# 989538ERL. They are AN3 to M10x1 inverted (Toyota) addapters. And if you were using race style flexible hoses, you may use AN3 anyway.

If you are using the Wilwood one, you will have to cut the flare off your Toyota pipe, replace the flare nuts with 3/8" -24 inverted, and remake the flare. Then use the 3/8 -24 addapters that come with the Wilwood valve.

[Joshstix]

I just cut and reflared the brake line when I put in my wilwood valve. Not a fan of adaptors, just another point of failure.

[william]

^^ what he said if you are in launceston just pull your pipes off and head to tas brakes im sure the boys there would do it for nothing

[1JZ-Rolla]

What car are we talking about here Jonny? Where is the factory proportioning valve located?

Cheers
Phil