IROC TV Viewers Guide

[Gburner]

Thanks for the info chuck.
11 inch bias bly slicks a little too much for 26mm rears.
Missing some rebound control too.

[letsrollbabe]

Thought folks would enjoy this trip down memory lane

Thanks for posting this link...I have watched it several times....just great watching actual historic events. That light yellow car was restored by Tom Linton back in the 90s (I think), and there was an article in Excellence showing the side damage had been repaired. Who wouldn't want to own one of these cars!

[Gburner]

Agree Gib a IROC 911 is the ultimate.
Even though it appears it would be the slowest race car in the garage.

[wsk]

They were soft guys... We run some of our 'street cars' harder than the old RSR factory setups...

In the 'Conversion Order 491' it states:

Front Axle:
1. Torsion bars - 22mm
2. Stabilizer bars - 20mm - adjustable
3. Blistein shock absorbers
4. Reiforced wishbone bearings

Rear Axle:
1. Torsion bars - 26mm
2. Stabilizer bars - 18mm
3. Reinforced steel trailing arms with 80mm wheel bearings.
4 Bilstien shock absorbers.

I suppose Penske could have changed the factory stuff.... Maybe Harvey W. would know?....
.........but just say'n



cm

Soft, yes, but remember these cars also had coilovers. The effective spring rate is the rate due to the torsion bar PLUS the contribution from the coil spring. For comparison, a 934 came with 19 mm front torsion bars (effective spring rate about 110 lb/in) plus 12.3 mm coil springs (about 300 lb/in) for an effective front spring rate of about 410 lb/in. At the rear a 934 had 26 mm torsion bars (165 lb/in) and 13.2 mm coil springs (about 420 lb/in) for a total of about 585 lb/in. Still soft by modern racing car standards but tire technology was different then, these cars had very little downforce, and maximizing compliance for mechanical grip was the order of the day.

[Fubawu]

Anywhere online to catch the rest of these races??