Austin Does His Thing!

A truly independent test shows the good performance and handling of the TSR chassis.

 

Courtesy Slot Cars Illustrated Forum

 

This is a report on the test conducted by well-known SCI contributor, "Austin". He selected the very nice Slot.It HRS chassis to match against the TSR "Home-Racing" chassis upgraded to current specification. Below are extracts of his tests, edited solely for clarity.

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 214

 

 Test # 1

 I just did 500 laps. 250 warm up laps then the 250 timed race. This is a stock TSR chassis with a

 small mod to the front to clear the Carrera bank turns. TSR/Ortmann high performance rear racing

 tires.

 

 The more laps I put on this car the easier it was to drive. There were no rattles and with little gear

 noise this car handled the S turns nice. I could break the back tires loose but this setup is very

 forgiving and whipped right back into place. The newer design guide pin worked very nice but it was

 hard for the Mr. Bugs Lap Timing Sensors to pick up the small guide. I ended up taken the shine off

 the guide and it worked a lot better only missing one lap out off the 250 laps.

 

 TSR chassis

 stock as supplied, no traction magnet.

 

 250 laps with no off but one lap timer miss:
 Average lap time 6.053
 Best lap time 5.895
 total time 25.14
 170 MPH fast lap

---------------------------------------------------------------------
 Slot.It "H.R.S" Chassis
 stock 25000 RPM 12V MOTOR, No traction magnet , No "Magnetic Suspension" with the longer bolts.

 The tires were the stock tires.

 250 laps with one off
 Average lap time 7.342
 Best lap time 6.410
 total time 30.36
 157 MPH fast lap
--------------------------------------------------------------------

 Going to take some photos, then setup for the next race.

  

 

tsrf 

International Racer

 

Join Date: Nov 2000

Posts: 755

 

 Whooo!

Good show Austin.
We ran into the lap-counting problem before, depending on the type of timer. While we have ZERO problem on all 3 tracks at Buena Park (what system are they using?), I am told of problems somewhere else. The solution? wrap a small piece of electric tape so that it has a "tail" behind the steel pin and... voila!
I am looking forward at seeing the pictures and more racing.
Regards,

Dokk P

 

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 214

The small piece of tape black tape worked wonders. Even with the magnet in place turning 4.675 lap times it didn't miss a beat. So it's time to get things ready for a few fast 250 lap races. That's if I can keep up with the cars.

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 215

Quote:

Hey Austin where about in the layout is the SensorTrak?

It's in a short straight so cars will be under full power. So with the magnet in place it miss counted a lot. I will test with tape on Sunday.

Photos of the Corvette setup TSRF test car.



Some cutting was done to get plenty of clearance for the chassis





With some nice wheel insert this car would look as great as it runs.



Next, magnets in both cars as stock setups. Don't worry there will be very many test. Stock setups are just a starting point.

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 216

 

 Test # 2:

 Stock setups with stock traction magnets in the rearmost slot for both chassis

 Slot.It "H.R.S" Chassis
 stock 25000 RPM 12V MOTOR, stock magnet under rear axle, The tires were  

 the  S1 Slot.It tires.

 250 laps with one off
 Average lap time 5.026
 Best lap time 4.862
 total time 20.56
 206 MPH fast lap
--------------------------------------------------------------------
 TSR Chassis
 stock motor, stock magnet under rear axle, TSRF-Ortmann high performance rear

 racing tires. The car was going so fast that I had a hard time staying with it. I almost loss control

 two times but the chassis is very forgiving.

 250 laps with no off
 Average lap time 4.876
 Best lap time 4.389
 total time 20.20
 229 MPH fast lap

 

 

Robert Livingston 

Championship Contender

 

Join Date: Feb 2003

Location: the mystical East

Posts: 1,301

 I use photo cells looking upward at the room lights, so no problem with a guide, pin, or anything, as

 long as the car itself breaks the light beam. The optimum is to use a light bridge, so peoples' arms

 reaching across the track don't trigger it.

 I finally sorted out the pin on my TSR car and broke my track record, formerly held by the       monster Porsche 917k/Parma I-32/S16D. I moved the guide pin back, so it is where the braids contact the track, and all contact issues went away. Gosh that TSR car is fast. 5.008 sec per 61' lap, or 12.18 feet per second.

 

 

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 232

 

 

Test # 3:

Tested both chassis with the same Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
Slot.It wheels with S1 tires on the rear, Slot.It gears, both with Fly Corvette bodies
No magnets for down force.

 

First up was the Slot.It chassis with Magnetic suspension and the longer bolts


250 laps with no off
Average lap time 5.873
Best lap time 5.791
total time 24.28
173 MPH fast lap

Then the TSR chassis

250 laps with no off
Average lap time 5.997
Best lap time 5.733
total time 25.00
175 MPH fast lap

This shows the TSR chassis being fast but not so consistent. With such a great difference between the two setups they are running very close times. I will re-run both of these setups.

 

 

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 232

 

 

Well wait 'til you read this. After 500 more laps I re-did the race with the Slot.It chassis.

Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
Slot.It wheels with S1 tires on the rear, Slot.It gears
No magnets for down force.
Magnetic suspension and the longer bolts


250 laps with no off
Average lap time 5.791
Best lap time 5.681
total time 24.08
177 MPH fast lap

Next 500 laps testing with the TSR chassis. The Slot.It Corvette set the mark high.

  

 

 

 

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 232

 

After 500 more laps I redid the race with the TSR chassis

Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
Slot.It wheels with S1 tires on the rear
Slot.It gears
Both with Fly Corvette bodies
No magnets for down force.


250 laps with no off
Average lap time 5.790
Best lap time 5.618
total time 24.07
179 MPH fast lap

These two chassis after these two tests seem very even. The Slot.It may be a little easier to drive but if I took a little more time to learn the TSR chassis, it is faster and I believe from looking at the best lap times, it would start to pull away. I also didn't like the way the Slot.It S1 tires worked on the TSRF chassis. So I will run this chassis one more time with this setup but with the stock tires.

I have put the new guide pin setup in the TSR chassis right after this photo, these test are with the new guide pin setup. The drive is also in the car, I will update the photos

 

Robert Livingston 

Championship Contender

Join Date: Feb 2003

Location: the mystical East

Posts: 1,329

 

 Rounding the corners of the TSR/Ortmann tires made a big difference at my track. I think I picked

 up a tenth of a second with that.

 Tweaking the metal plate so there was the same amount of play when the right and left front wheels

 were lifted (and the rear tires were planted on the track) also made a difference. I also recall a little

 cutting of the underside of the black plastic hooks that hold the pan, to allow more freedom of

 motion.

 The TSR chassis responds well to these small things.

  

 

tsrf 

International Racer

 

Join Date: Nov 2000

Posts: 772

 

 Warp Speed Alert!

 

Indeed. It is in fact important, to obtain maximum performance, to blueprint the whole chassis:

1/ tweak and bend the plastic chassis over a piece of glass (flat surface) until absolutely flat. The special plastic is glass filled so has low memory, meaning that whatever you do with it, it will keep that shape. Then install the contact rails.
2/ if required, tweak and bend the steel body mount until totally flat.
3/ assemble the whole mess. Once "protected" by the steel body mount, the chassis will stay flat even under the hardest hits.

The guys running these cars in a very serious way at our local racing center are doing this, and it pays in spades. Mike Steube is currently the best, closely followed by Paul Sterrett and Yours Truly. When we began running those cars 2 years ago, we were doing 7.5" on the King. Today and with the same exact parts, we are doing 6.3"...

 

Austin 

National Racer

 

Join Date: Aug 2003

Location: At Home

Posts: 237

 

 Slot.It is not going to like this...

 Well wait till you read this. After 500 more laps I redid the race with the Slot.It chassis. After this

 race I pulled the body off to pull the magnet in for the next set of races and found out I had already put it in before this race. So the number below are with the magnet in the rear area.

 Slot.It chassis With magnet for down force.

 Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
 Slot.It wheels with S1 tires on the rear
 Slot.It gears
 Magnetic suspension and the longer bolts

 250 laps with no off
 Average lap time 5.791
 Best lap time 5.681
 total time 24.08
 177 MPH fast lap

 
 TSR chassis with no magnet

 Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
 Slot.It wheels with S1 tires on the rear
 Slot.It gears


 250 laps with no off
 Average lap time 5.790
 Best lap time 5.618
 total time 24.07
 179 MPH fast lap

 

  The TSR chassis without a magnet is faster than the Slot.It with the stock magnet.

 The magnet was then removed from the Slot/It and then raced. That post is now updated (see

 below). 

 

 Last edited by Austin : Today at 06:29 PM.

 

 

Austin 
National Racer
  
Join Date: Aug 2003
Location: At Home
Posts: 237
 
 Non-magnet races with the Fly racing motor and S1 tires

 First up was the TSR chassis


 Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
 Slot.It wheels with S1 tires on the rear
 Slot.It gears
 Both with Fly Corvette bodies
 No magnets for down force.

 250 laps with no off
 Average lap time 5.997
 Best lap time 5.733
 total time 25.00
 175 MPH fast lap

 After 500 more laps I redid the race with the TSRF chassis

 250 laps with no off
 Average lap time 5.790
 Best lap time 5.618
 total time 24.07
 179 MPH fast lap


 Then the Slot.It chassis


 Fly Racing (Mabuchi FK) 26,750 RPM/12v [32,992/14.8v]
 Slot.It wheels with S1 tires on the rear
 Slot.It gears
 No magnets for down force.
 Magnetic suspension and the longer bolts

 250 laps with no off
 Average lap time 5.873
 Best lap time 5.791
 total time 24.28
 173 MPH fast lap

 After 500 more laps I redid the race with the Slot.It chassis.

 250 laps with no off
 Average lap time 5.934
 Best lap time 5.802
 total time 24.44
 173 MPH fast lap

  
 

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