Superorb

im getin legend calipers up front on my accord soon, so ima have huge stopping power in the front, and i already lock the fronts way b4 the rears stock, so its gonna lock way faster after the swap...

so, would a proportioning valve help me distribute the pressure better?

ive got abs but i turned it off cause its malfunctioning. one oif these days ill swap the pump for a non-leaking one..

JimBlake

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Superorb &raquo;</TD></TR><TR><TD CLASS="quote">... i already lock the fronts way b4 the rears stock, so its gonna lock way faster after the swap...</TD></TR></TABLE>
So if you already lock the fronts first, are you gonna tell us why you want to install even more in the front?

integra6650

abs is gross your a gross gross person for having it

Superorb

the purpose of a proportioning valve is to LIMIT, keyword here, limit the amount of bias there is to the FRONT brakes, therefore evening it out w/ the rears.

and i have abs, but it is disconnected... u guys seriously need to read more carefully...

JimBlake

No, a proportioning valve limits the rear brakes.

Braking force is linear with pedal pressure for both front & rear. The front/rear bias comes from the piston diameters in the MC and all the calipers, which are chosen based on the front/rear weight distribution of the car. With moderate braking, the proportioning valve doesn't do anything.

When you brake harder, more vehicle weight transfers to the front, so the rears would lock up early if there were no device to prevent it. So as soon as the brake fluid pressure reaches a certain point, the valve restricts the pressure going to the rear. The rear braking force continues to increase as you press the pedal harder, but at a lower rate.

I think if you want a proportioning valve to limit the fronts, you'd have to do some strange plumbing or have something special made up.

ABS doesn't have anything to do with this, unless your car's ABS also has EBD built into it.

integra6650

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">one oif these days ill swap the pump for a non-leaking one..
</TD></TR></TABLE>

Superorb

thx for the explanation jim, i was meaning to do more research on this but i guess u solved that for me... ima have someone stand out the car and tell me which wheels lockup first, cause as far as i know its the fronts but then again im in the car..

BigMoose

Here is a nice link for anyone who wants a thumbnail explanation of how stock proportioning valves work.

Sort of interesting background to this discussion. BTW I think Tilton Engineering makes some variable aftermarket brake proportioning valves.

http://www.geocities.com/Motor....html

Superorb

if you go to http://www.summitracing.com, and type in proportioning valve, it comes up w/ like 5 different ones.

im reading the article nmow..