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Topic: '11 AutoX thread (Read 16731 times) previous topic - next topic

'11 AutoX thread

Reply #45
What IRS are you running?  1999-2004 Cobra?  I'm really interested to know.  Cool car and congratulations on such great times!

'11 AutoX thread

Reply #46
yup, Cobra IRS.

Today was good. Decent weather, dry pavement. New-to-me front tires have enough grip to make the car feel a tad loose out back. Might try to tweak a bit here and there, but the car feels good overall.

Ended up winning my class for the weekend. I'll put up the results when they are online.
gumby - beauty may fade, but stupid is forever!


'11 AutoX thread

Reply #48
Good job Gumby.
'88 'bird, 10.9:1 306 w/TFS top end, forged rods/pistons, T-5 swap & bunch of other stuff, 1-family owned, had it since ‘98, 5.0tbrd88 on Instagram and YouTube

'11 AutoX thread

Reply #49
Thanks Chris!



[COLOR="darkgreen"][SIZE="5"]NEWSFLASH:[/SIZE][/COLOR]

Bottoming out the rear suspension WILL cause snap oversteer. Who woulda thunk it?
I was contemplating disconnecting the rear swaybar for the next event due to some issues with the back of the car gettin loose in steady state corners. While under the car today I noticed some fresh witness marks on the CV shafts that hadn't been there previously.
A lil investigating found the CV'shiznitting the upper control arm at about 1" up travel. Apparently the R-comps are working the suspension a bit more than in the past :hick:
When I built the rear suspension I cycled everything to decide how to mount my shocks, but thinking back, I'm not 100% sure I had the CV's in place at that time. So I checked the shock travel, and sure as shiznit I wasn't even close to the bumpstops.
Spent a lil quality time with the grinder against the upper control arm and gained a full inch of up travel w/o changing anything else. Guess I'll leave that swaybar on there....:toilet:
gumby - beauty may fade, but stupid is forever!

'11 AutoX thread

Reply #50
Chris, You still running factory rubber bushings out back in your IRS??


86' T/C 4.6L DOHC
16' Chebby Cruze 1.4L Turbo
17’ Peterbilt 389 600hp 1850ftlb Trq 18spd

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'11 AutoX thread

Reply #51
No rubber bushings anywhere on my car. The IRS sub is poly front mount, and solid rear mount. Control arms are Delrin. Diff mounts are poly
gumby - beauty may fade, but stupid is forever!

'11 AutoX thread

Reply #52
Quote from: gumby;367292

A lil investigating found the CV'shiznitting the upper control arm at about 1" up travel.

 
Do you mean the tires are working the suspension enough to cause the IRS components to interfere?

What spring rates are you running?
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'11 AutoX thread

Reply #53
Yup. Remember though, my upper control arm mounts have been cut off the subframe and relocated. That modification "required" the use of aftermarket control arms which I opted out of.

00 CobraR coils
gumby - beauty may fade, but stupid is forever!

'11 AutoX thread

Reply #54
I think you were better off staying with the stock uppers, even if you had to mod them a bit.

BTW, did you head out to Putnam Park this weekend? :p
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

'11 AutoX thread

Reply #55
agreed on the uppers.

I soooo thought about goin out there :evilgrin:
gumby - beauty may fade, but stupid is forever!

'11 AutoX thread

Reply #56
Quote from: gumby;367498
I soooo thought about goin out there :evilgrin:

I almost called you.  I had a bunch of stuff to do on Sat though.
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

'11 AutoX thread

Reply #57
This weekend I finalize my cp standings for the year.  Nobody can beat me now, lol.  Course was really challenging this weekend and there were lots of coneshiznit.  I had problems in one spot with my car doing the snap oversteer thing, but thanks to a picture, I found out what was really happening.  I was loosing the grip off the inside rear tire and causing it to slide out.  It was through a bumpy area too to make things worse!

88 t-bird tc - 14.97 @ 90  IHI 18 psi + k+n filter...so far - NOW HX-35 @25psi - 12.75@112    348rwhp/395rwtq
78 F-150 - 11.61@120 on 175shot N20 - 12.55@110 on motor - 5200# race weight:hick:

'11 AutoX thread

Reply #58
Is that two tires off the ground??! :hick:
gumby - beauty may fade, but stupid is forever!

'11 AutoX thread

Reply #59
yes it is!  Dad said around another corner he saw 3 off which is really interesting since I didn't know the front wheel was coming up let alone 2 more, lol.
Heres the results from sunday - looks like only 6 faster than I.
http://nworscca.com/attachments/results/2011/2011_e8_results.htm
index
http://nworscca.com/attachments/results/2011/2011_e8_index.htm

88 t-bird tc - 14.97 @ 90  IHI 18 psi + k+n filter...so far - NOW HX-35 @25psi - 12.75@112    348rwhp/395rwtq
78 F-150 - 11.61@120 on 175shot N20 - 12.55@110 on motor - 5200# race weight:hick: