sdpatt's 366,000-mile SHO at TWS

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NotSoSlowSHO

Gas is $$ WALK!
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Pretty darn fast, from the sounds of it. Unless I missed it, it sounded like he was past the secondaries in 4th.

Those R's sure help! It is hard to tell from the video, but from here it looked like you were holding those turns at a pretty good clip :)
 

sdpatt

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Waaaay past the secondaries in fourth. I was getting up to an indicated 6200-6300rpm at an indicated 120-125mph at the end of the "straight." With the 225/50-16 track tires and their 3/32" of tread remaining, the speedometer read an indicated 70mph at a GPS measured 68.9mph on the highway back to the hotel at the end of the first day for an error of about -1.57%. For the indicated 125mph, that calculates to a true velocity of about 123mph. Last year, I measured a maximum 122.0 mph with the GPS at the end of the straight. The difference could easily be attributed to wind speeds or extra exit velocity from the esses before the front straight.

I was enjoying the higher speeds thorugh the corners, but they weren't drastically different than the speeds with the Bridgestone S-03's last year. The R compounds added a good measure of confidence with their communication at the limts - which were exceeded repeatedly. The fastest corner 7, the left hander at the end of the longest section of the back striaght, I ususally entered near the rev limit in third gear - between 7,000 and 7,300 rpm. I would just lift a bit on the accelerator pedal to transfer the weight to the outboard trires and let the car take a set. The car would clip the apex at the dip in the corner at around 90mph and I would be back on the gas full throttle to the next braking zone.

I seemed to gain the most ground in the braking zones. With the '96 brake upgrade and carbon metallic pads, I had good confidence in my ability to scrub off speed. No fade through the whole 25-minute session. Anti-lock would be exercised frequently on the bumpier braking sections. Even the instructor that rode along the first session of each day said, "this car has good brakes." I got to ride in his "black Ford product," a Ford GT. That was quite a blast. Literally.
 

SASHO91

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I remember your face after you got out of that GT...

I wish the PFCM's for the Cobra's preformed as well as they do with the 96' upgrade.

Great to see you again Scott.
 

Shoaz

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Waaaay past the secondaries in fourth. I was getting up to an indicated 6200-6300rpm at an indicated 120-125mph at the end of the "straight." With the 225/50-16 track tires and their 3/32" of tread remaining, the speedometer read an indicated 70mph at a GPS measured 68.9mph on the highway back to the hotel at the end of the first day for an error of about -1.57%. For the indicated 125mph, that calculates to a true velocity of about 123mph. Last year, I measured a maximum 122.0 mph with the GPS at the end of the straight. The difference could easily be attributed to wind speeds or extra exit velocity from the esses before the front straight.

Wheel slip will be much more pronounced at ~125mph than at 70mph due to aero, so I think it's tough to try to be that accurate based on a calibration at 70mph.

Looks like a very fun track. Nice vid.
 

sdpatt

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Last year, I measured a maximum 122.0 mph with the GPS at the end of the straight.

No wheel slip involved in that measurement. It's safe to think the car was doing about the same speeds as the previous year, especially when there was a tail wind this year and a head wind last year. I was entering the straight at a faster speed this year because of the better traction through the esses and was shifting into fourth at 7000 rpm many car lengths sooner than in last year's videos.

No matter what the speeds were - I was having a good time.:thumb:
 

sdpatt

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was the motor everyrebuilt since it has so highmileage

Other than the standard 60K services and replacement of hoses and seals, the only other item has been the replacement of the connecting rod bearings at 258,000 miles as preventative maintenance.

Maintain it and the Yamaha will run.
 

TimboSHO

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That car is really incredible! Looks like the driver is the best mod in that SHO!
 

sdpatt

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This was the third year that the Lone Star SHO Club has visited that TWS track. Each visit has two days of 5 20-minute sessions or 4 25-minute sessions for 100 min a day for two days. That is basically my sixth day on the TWS track.
 

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