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The ASCC club’s Hudy truer, using the ‘normal’ 3/32 axle accepts NSR hubs.
P&N truers, which can true two tires at once, have a flat-relief (for the grub screw) and the 3/32 axle barely allows a snug fit of a NSR hub.
The 3/32 axle of the ASCC club’s Backtrack 2True Dual Tire truer is Too fat for use with the NSR hubs."... get on your bad motor scooter and ride!"
Sammy with MontroseI am not familiar with NSR cars. I did not run the NSR Mosler or NSR Porsche 917 series and have no memory of the Modern GT series. The Modern GT race reports said I ran three races in it but my car was not identified and I did not recognize any cars in the single race photo; maybe I ran a borrowed car. The primary problem with my Corvette in this series seems to be trued tires. The car chatters a lot with what appears to be out-of-round tires. The NSR wheels seemed to be a snug fit on my P & N truer and I had trued them until they were butter-smooth, but on the track they bounce. The initial problems seemed to be with gearing and weight placement. After experimenting with weight placement and ordering and trying more NSR gears, I was able to get the car to handle much better, but the tires bounce. I tried the wheels/tires on the Hudy truer at the track but the wheels are looser than they were with the P & N. Very frustrating. I am going to order another set of wheels and tires and give them another try.
Russ – I have previously trued NSRs on my P&N (such as for the NSR rally series) and don’t recall specific problems. But truing the NSRs on the P&N may have made your hubs microscopically oblong, or maybe the tires are just wonky (shifted during the truing process).
For this series – I trued my stock NSR Super-grips (brand new C7R Vette) on the HUDY.
I added Thunderslot ‘foam donuts’ to fill the gap and lightly ShoeGoo’ed the tires.
My Supergrips seem to be shedding/marbling and hence chatter a little in straight line. They also require a good rounding to prevent chatter in the corners.
The Moslers and 917s seemed easier to tune. Today – I can hit 4.1s immediately with my 917. When the tires and motor warm up (50 laps?) it runs consistently in the mid 3.9s without trying.
Both 917 and Mosler have a lower CG and dont have the big caboose as compared to the Vette."... get on your bad motor scooter and ride!"
Sammy with Montrose
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