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924RACR

WooHooo!!! The race season is upon us!!! We're back at it, at Mid-Ohio for Friday, Saturday, and Sunday this weekend (4/4-6) with NASA and the GTS Challenge! Friday is practise sessions, but we'll be racing late in the afternoon (around 4PM) on both Sat and Sunday...

Unlike SCCA, NASA actually welcomes spectators, for a change - so if you want to come out and watch, please do! Please also do stop by and say hi, if you're in the area - you all know what my cars looks like!

As for the weather, it looks nice and warm on Friday, slightly cooler and partly cloudy Saturday, and cooler still (mid-40's) and chance of showers on Sunday. If you want to see some fun racing at a nice time, on one of the best tracks in the Midwest, now's the time! If you really want to see some good racing, come by on Sunday and pray for rain!

We have 10 cars signed up for the GTS Challenge so far, plus some other Porsches and Bimmers in faster classes, so there's going to be plenty of excitement to see...

GTS Challenge (series info):
http://www.924.org/GTSChallenge/

NASA Website (race weekend info, maps, schedule, etc.):
http://www.racenasa.com/
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

dgz924s · Joined: 03 Nov 2002 Posts: 592 Location: Kansas

NO SPINNING ALLOWED!!!

Have a great weekend! Dallas

jjadczak · Joined: 03 Jan 2003 Posts: 346 Location: Accokeek, MD

Vaughan, I'm really interested in seeing your lap times with the Michelin's as compared to the Hoosiers. Have fun this weekend!

924RACR · Posted: Fri Apr 04, 2003 6:18 am Post subject:

Thanks! However it may be hard to tell; it's supposed to be really cold, and I've heard that the Michelins take some time to heat up, only sure to be aggravated if it's cold!

I may also take along a swaybar, try swapping it in...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

924RACR · Posted: Tue Apr 08, 2003 12:59 am Post subject:

OK, here's the answer about the Michelins. It's hard to compare, since it's not 1-1 comparison; the Hoosiers, in addition to being wider, are on late-offset phonedials. The Michelins were on stock 924 5-lug spiderwebs. This meant the inner faces of the tires were even, resulting in an effective loss of 60mm of track front and rear going to the Michelins. Also, I only ran the Michelins to scrub them in, didn't go back out the next day after they were heat-cycled.

Sat in Qualifying was when I ran the Michelins. I turned 1:55's with them, down from a 1:54 in practice earlier that day on the Hoosiers. OTOH, that afternoon I ran 1:55's in the race on the Hoosiers. So preliminary indications seem to show no loss of speed. I'd say I'll be in very nice shape once I get spacers to get the tires back out to the corners and figure out the pressures to run the Michelins at. As far as feel, they felt fine...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

jjadczak · Joined: 03 Jan 2003 Posts: 346 Location: Accokeek, MD

Michelin's are slightly narrow from the Hoosier's? Since I don't have a Hoosier to compare I'm going to assume the Khumo's must be wider than the Pilot's. Was it difficult to get any heat in them? or are they designed not to over heat like the Hoosiers? Did you have them shaved? We've pretty much made up our minds to get them. Speaking of tires, I was with the car this weekend and inspected the Khumo's and found that one was completely worn down to the cord!! Needless to say we have a fresh one enroute.

924RACR · Posted: Tue Apr 08, 2003 3:58 am Post subject:

No, it's that I chose to go with a narrower tire for weight reduction. I have the 205/50 Pilots, run the 225/45 Hoosiers.

I don't think I had too much problem getting heat in them, maybe I slide around a lot more than most (driving style, I mean). I gave them time, a couple of laps to come up to temp, it was cold anyway, all our tires took time to come up to temp. Ambient was around 32 avg over the weekend.

I did not have them shaved. This design does not appear to suffer from the excessive wear you see in an unshaved Kumho. They have the lateral grooves half-depth, circumferential grooves full depth. This stabilizes the tread blocks, I believe, keeps them from folding over and chunking. They looked great after the first session from sticker. You can probably run them as an intermediate until the first layer of grooves goes away, maybe even longer (due to the deeper circumferential grooves) before any concern about running them in the wet.

As mentioned previously, they apparently do like time to come up to temp. Haven't raced on them yet, really, so can't comment.
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype