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My son and I took my 2016 GT350 Track Pack and my 2014 Boss 302S to the Northwoods Shelby event at Road America a week ago. On the way up, we were wondering which car would be fastest. I thought it would be a close call, and that turned out to be true. We switched back and forth between the cars. My best laps were in the 2:33's in both cars and his best laps were mostly in the 2:30's, but he did get the 302S under 2:30 in his last session. I ran a 2:31 in Time Trials in the 302S in May, but couldn't get down to that at this event.
Both cars started with a new set of Hoosier R7's. 295/30-19's square on the 302S on stock 302S rear wheels (with a half inch spacer on the front hubs). 315/30-19 and 295/30-19 on the GT350, on stock wheels.
Both engines and drive trains are completely stock. The 302S puts down 407 SAE Hp on the Dynojet, and the GT350 puts down 456, both running on 98 octane race gas. Rev limiter on the 302S is 7800 RPM, while the GT350 is of course 8250. The 302S is about 300 Lb lighter.
The 302S's were built by Watson racing with a Tremec transmission, rather than the Getrag of the street Bosses, and the 2014 model 302S's got bigger brakes than the street Bosses or the 2012-2013 302S's. The brakes would not be legal for American Iron, but I just use the car for Time Trials.
Both have 3.73 axles with Torsen differentials, but due to differences in transmission ratios, the 302S can run Road America in only 3rd and 4th, while the 350 requires 3rd, 4th and 5th.
The links below show in-car video using Harry's lap timer for the 350 and the 302S. The videos, particularly on the 302S are shaky at high speed. Also, the GPS in my iPhone 5 sometimes shows some obviously incorrect speed readings, like showing the 350 slowing to 60 mph after exiting the carousel at 85 mph and accelerating toward the kink. However, the lap times that Harry's produces are extremely close to what the AIM system in the 302S shows. I believe the AIM has a better GPS that outputs readings multiple times per second, rather than the one per second of the iPhone 5. The AIM shows the 302S reaching a few mph higher speeds on the straights, and I think its because the AIM's GPS is more responsive. I think the iPhone GPS if filtered, causing some delay in reading actual speed. The G meter on my iPhone was obviously not calibrated, because it always sits on one side of center.
At Road America, you really use the brakes hard to slow from 135-145 mph at the end of the high speed sections. We don't like the over-activeness of the ABS on the 350 (in Track Mode plus Autotrac turned off). It was running GLOC R18/R12 pads recommended by KNS Brakes, but maybe the ABS calibration doesn't work well for those pads. The 302S will brake just as hard as the 350, but does in a more controllable manner.
https://www.youtube.com/watch?v=vbdsfEvEvR4
https://www.youtube.com/watch?v=qUR36fwgXOo
Both cars started with a new set of Hoosier R7's. 295/30-19's square on the 302S on stock 302S rear wheels (with a half inch spacer on the front hubs). 315/30-19 and 295/30-19 on the GT350, on stock wheels.
Both engines and drive trains are completely stock. The 302S puts down 407 SAE Hp on the Dynojet, and the GT350 puts down 456, both running on 98 octane race gas. Rev limiter on the 302S is 7800 RPM, while the GT350 is of course 8250. The 302S is about 300 Lb lighter.
The 302S's were built by Watson racing with a Tremec transmission, rather than the Getrag of the street Bosses, and the 2014 model 302S's got bigger brakes than the street Bosses or the 2012-2013 302S's. The brakes would not be legal for American Iron, but I just use the car for Time Trials.
Both have 3.73 axles with Torsen differentials, but due to differences in transmission ratios, the 302S can run Road America in only 3rd and 4th, while the 350 requires 3rd, 4th and 5th.
The links below show in-car video using Harry's lap timer for the 350 and the 302S. The videos, particularly on the 302S are shaky at high speed. Also, the GPS in my iPhone 5 sometimes shows some obviously incorrect speed readings, like showing the 350 slowing to 60 mph after exiting the carousel at 85 mph and accelerating toward the kink. However, the lap times that Harry's produces are extremely close to what the AIM system in the 302S shows. I believe the AIM has a better GPS that outputs readings multiple times per second, rather than the one per second of the iPhone 5. The AIM shows the 302S reaching a few mph higher speeds on the straights, and I think its because the AIM's GPS is more responsive. I think the iPhone GPS if filtered, causing some delay in reading actual speed. The G meter on my iPhone was obviously not calibrated, because it always sits on one side of center.
At Road America, you really use the brakes hard to slow from 135-145 mph at the end of the high speed sections. We don't like the over-activeness of the ABS on the 350 (in Track Mode plus Autotrac turned off). It was running GLOC R18/R12 pads recommended by KNS Brakes, but maybe the ABS calibration doesn't work well for those pads. The 302S will brake just as hard as the 350, but does in a more controllable manner.
https://www.youtube.com/watch?v=vbdsfEvEvR4
https://www.youtube.com/watch?v=qUR36fwgXOo