longdaddy

moved from outer to middle hole, wondering what should I expect, the car feels mostly neutral, slightly pushing mid-corner.

CP Thunder

Just a guess on my part as our T1 bars are not adjustable but stiffening the rear bar should eliminate the mid corner push if not induce a bit of oversteer........

davidfarmer

considering where you started, I would hope it would reduce your understeer and induce some throttle oversteer. Did you move both bolts or just one??? Should be a step in the right direction

drivinhard

I run a square tire/wheel set up, and have about 53/47 weight split. My car was decent on stickers, but the car would go to oversteer (on entry or exit) as the tires aged, with the old style non-adj T1 bar.

When I went to the adj T1 bar, I put it on the outside to soften it up, and the car has been truly perfectly balanced for my tastes ever since. It has always amazed me at how well it will trail brake now, you can really throw it in and get on the brakes hard and still have the rear end planted pretty good. CMP T4 comes to mind. Car is still a bit tail happy mid corner and off, but that's how I like it.

CP Thunder

Interesting......I was considering putting the adjustable bars on and asked Jeff Kopp to measure the old bar vs the adjustable bar as far as where the hole placements were. He said the new bar's outside most hole was the same distance as the old bar and that the new holes were inboard of that. This would mean (to me) that the new bar would allow for 'stiffer' setup but none softer..........

May have to reopen that investigation......

redtopz

Let us know what you find out. I just moved mine from the outer most holes to the middle holes because I felt some push. My car feels really good in fast turns, but seems to push a little in slower turns unless I really toss it in with trail-braking. I'm also running 335 tires in back which contributes to that.

SIK02SS

I need to find an adjustable rear bar!! Would've helped this past weekend

sperkins

I agree 100% and I stole the idea from you.
CMP T4 is the perfect example for trail braking. I noticed though that my '03Z on stock shocks was horrible there. On '04 shocks it was great. Weird...

Should be interesting to hear how yours does there this weekend with the stock bars.

drivinhard

car count looks good, might have to run the T1s

sperkins

Then I just cancelled.

drivinhard

T1 adj:

from center of hole to center of hole:

41" (inner)
42.5" (center)
43.5" (outer)

bar is 1.075" on the caliper, and 8.20 lb on the shipping scale

anybody got a non adj. one to measure/weigh?

SIK02SS

If you send me yours, I'll take mine off, weigh it to compare and ship it off to you

CP Thunder

I should be getting ours back soon. Loaned them to a NASA guy to try out and he smacked the wall at St Louis last weekend. Not sure if they were on the car when he crashed........haven't talked with him since he got back. Will spec it out when I get it but that 43.5 number sure sounds familiar............

drivinhard

check the bar dia and weigh it (thickness)...maybe the rate changed slightly on them to.

CP Thunder

Will do!

CP Thunder

Still don't have our bars back........................hopefully soon...............

longdaddy

update. both middle holes was a little too much oversteer when applying throttle midcorner and a handful in the wet.

running middle hole on the left, outer on the right, just about perfect. pretty predictable over/understeer modulation with the throttle now.

CP Thunder

I have our T1 bars back now too.......will measure this week and update.

In the wet, you should disconnect one side............completely.......

longdaddy

i probably should have. did a wet (very wet) day on 555r2 tires and it was pretty nasty.

CP Thunder

outer holes are the same on both bars 43.5 inches.........diameter is also the same @ 27.5mm