I got the "ADM" AE86 one-piece proportioning valve today, and cut it in half. Just to double confirm what I said. Yep, it's solid metal. Front not connected to rear.
good to know, so let me get this straight; the spring jigger is just a very crude preload that restricts the fluid flow for the rear wheels? You know this negates the need for any sort of bias adjuster if someone is willing to play with the stock one with different springs.
Jonny I honestly think your this forums best non operational resource
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Limits the pressure to the rear brakes, not the flow. I had the same idea with my skyline master. Bias spring is built in so altering the spring pre-tension should result in tuning of the rear bias.
If you really need a black and white illustration of how a bias valve works, have a look at a graph of their operation. It's then easy to see the effects.
thanks, has anyone tried putting a ra60 pv spring into a ae86 pv?
30kw club
af300e: got a graph handy? I would really like to see one
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There is a hollow aluminium shaft with a coregated rubber seal at the end.
How it actualy works could bend my brain. It is to do with difference in pressure from front to rear, and maybe differences in the diameter of the alloy shaft. The shaft may move a bit...
I think the differences between the Toyota valves of this era, is just the spring. I have 2 springs here, a "ADM" one, and one out of a single style one. The ADM one is softer, but I can't remember what car the other was off.
I think you could increase spring pressure with washers, if you didn't have another spring to swap in.
I'll have a hunt.
I think I could make an adjustable one using the Toyota one as a base. But it would be easier just to buy the Wilwood/Tilton valve.
^^^Thanks for those links. They have the graphs I was talking about.
What does a wilwood valve run costwise? $100?
Yeah. $93 on ebay. Maybe $200 in a shop.
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