Seen a few questions here and there about the NSX upgrade. I'm working on a tech post here:
https://honda-tech.com/zerothread?id=1787815

Not exactly on an ITR, but should be relevant anyway. Without a proportioning valve, this setup is pretty worthless. Even with Panther+'s on the Stop-Tech fronts, and el cheapo Autozone NSX pads on the rears, the rears still locked up even in mild brake zones (10K springs rear, 8K fronts, 40/40 stock valve). Next step in the setup process will be 14K rears and 10K fronts and a proper prop. valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrlegoman &raquo;</TD></TR><TR><TD CLASS="quote">
the rears still locked up even in mild brake zones (10K springs rear, 8K fronts, 40/40 stock valve).</TD></TR></TABLE>

Now I'm really glad YOU were the guinea pig and not me

 

What are you planning to run for individual proportioning valves? I have the NSX front & rear setup on my GSR and have been debating what to run to balance it out.

I'd like to take out my ABS and run all new lines to get rid of the diagonal pairing and run individual front and rear adjusters.

Curious as to what setup you're going with.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jvtec95 &raquo;</TD></TR><TR><TD CLASS="quote">Curious as to what setup you're going with.</TD></TR></TABLE>Have not quit nailed that down yet either. I don't plan to rerun all my lines though.

 

Subscribing... if these will fit under stock itr wheels...

 

They do, barely. I have NSX front & rears on my GSR with ITR 5-lug and stock ITR 15" wheels.

As mrlegoman has discovered (and I'm sure I will as well once my head is returned to my block), they tend to be a bit rear-biased overkill as they were meant for a mid/rear engined car and our integras have next to zero weight in the rear.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black R &raquo;</TD></TR><TR><TD CLASS="quote">Subscribing... if these will fit under stock itr wheels... </TD></TR></TABLE>

they do fit under stock itr wheels. let me know if you need pics.

 

Whatever happened with this? Did you use the individual prop valves? I'm doing this swap as well and am curious.

 

the last reply of this thread was back in 06 bro my guess is you will be the guinea pig and be kind enough to tell us

 

I think it was determined that the added weight of the rear calipers would cancel out any improved braking benefit.

 

I mainly just want to know if the OP ended up using an adjustable prop valve to fix the rear bias. If so, how is it done?

 

On Hondas you would need two separate valves. This maintains the extra margin of safety of having two braking channels (LF, RR & RF, LR). Because an adjustable prop valve only has one in and one out, you will have to pretty much re-plumb all your hard lines. On either port from the master cylinder, you would run a line to a tee. From the tee, one line would go to one front tire, and the other would run to the opposite rear tire. Then you would splice the prop valve into rear brake hard line somewhere before the caliper. Now repeat for the second channel coming off the master cylinder.

I've seen one guy install two adjustable wilwood prop valves inside the cabin of his EG race car. Made the proportioning adjustable on the fly. Kinda cool as long as it won't get bumped. Of course I have no idea how sensitive the adjustment is.

I couldn't find the picture of the dual setup, but here is what one valve looks like installed:



BTW: There is no good reason to install oversized rear brakes on an integra. If your rears are running a lot cooler on the track than the fronts, then the only thing you've accomplished is adding a bunch of unsprung rotating dead weight (the absolute worst kind).