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American mag wheel, silicone set screw, rear tires


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#1 MSwiss

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Posted 06 September 2019 - 02:17 PM

Black silicone, molded on.

Approx. 1.100" diameter.
 
$30 pr. & shipping.
 
20190906_141347.jpg
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Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516





#2 MattD

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Posted 06 September 2019 - 04:40 PM

Mike, I need a couple pair.   PM sent.

 

They will be a good match for the fronts on this jalopy that I built to run with my "Tues Nite Crashers".

 

P1010002 (2).JPG

 

 

 

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#3 Martin

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Posted 06 September 2019 - 05:18 PM

Oh no, its that bug guy again. There breeding like flies :laugh2:

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#4 MSwiss

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Posted 06 September 2019 - 05:23 PM

Mike, I need a couple pair.   PM sent.
 
They will be a good match for the fronts on this jalopy that I built to run with my "Tues Nite Crashers".
 
attachicon.gifP1010002 (2).JPG

OK, you got them.

Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#5 Tangmere

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Posted 07 September 2019 - 10:24 AM

I'll take a set if there are any left.


Mark Gerrard

#6 MSwiss

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Posted 07 September 2019 - 10:30 AM

There isn't.

 

I'll see if he'll do more, but as I've suggested, you can send him your existing rims.

 

It's the same guy I've suggested to you, a couple of times, to contact.


Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#7 MattD

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Posted 09 September 2019 - 04:40 PM

Tires arrived today and they are great looking.  Obvious he spent a good amount of time doing these.   The molding is nice and sharp with rounded sidewalls on front and back.   I ran them on my test chassis and they  were .3 slower than my usual Pro Track silicone coated tires (permatex windshield sealer).   That is with a lap time of 4 seconds.  

 

 They do grip better than the urethanes I get from France.    They also are slightly harder than the Pro Track foam tires.   Usually harder is a little slower on my track.    I am happy with them, but would like to know if they are truly silicone or if they are actually urethane.   On a perfectly clean track with no silicone residue, I believe they would be great tires and hook up just fine.  I used to not believe the old wives tail about silicone leaving an oil on the track that hurts grip from tires other than silicone.    I believe this is true after our experiences on my track.

 

I will do some sanding and see what the results are.  

 

This is a silicone rubber

silicone 1.jpg

This is a urethane rubber

urethane.jpg

 

these are not the same thing and their chemical makeup is not the same

 


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#8 MSwiss

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Posted 09 September 2019 - 05:15 PM

Thanks for the feedback, Matt.

 

I'm going to leave this thread open, and please report back after you sand them, and /or get a bunch of laps, on them.


Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#9 MattD

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Posted 09 September 2019 - 06:04 PM

Mike, I would think running a bunch of laps  will improve the track surface and not really change the tire itself.   A lot of the guys I know that build tracks use urethane and they generally agree that  you must run a few laps to  "rubber in" a fresh track and then the urethane really grips.  Silicone seems to grip best on a track that has "rubbered in" from the silicone tires, but they also grip pretty good on a fresh, newly painted track.  

 

I will sand them on the chassis  to smooth them out and see how that changes the lap times.   

 

He has done a really nice job.


Matt Bishop

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#10 MSwiss

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Posted 09 September 2019 - 07:42 PM

Like I thought he had said, you are running on 100% silicone.

20190909_193919.jpg

Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#11 MattD

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Posted 09 September 2019 - 09:42 PM

A lot of us  tried silicone caulks/adhesives in the past, but we could never get a complete cure, they would usually only cure on the surface.    Chemical cure  is what made the 2 part molding silicones so good.   They chemically cured and weren't air cured.   There have been many, many changes in this stuff the last 25 years, so  it looks like now there is an air cured silicone that makes good tires.     

 

Maybe tomorrow, I will sand these tires and run them for a few laps then check the times.    

 

 

thanks to him for sharing what he uses.


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Vintage Cox Slot Cars

#12 MrWeiler

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Posted 10 September 2019 - 12:33 AM

Hi!
Thinking about doing some matching fronts?

"TANSTAAFL" (There ain't no such thing as a free lunch.)
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#13 MattD

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Posted 10 September 2019 - 08:53 AM

Really don't want a front made of silicone, that would be too grippy.  You can use urethane and spray clear on them to make them have no grip.   In the car  pictured above I have a set of Cox narrow Am Mag fronts with Cucaracha knife edge tires, they make a good combination.


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#14 MattD

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Posted 11 September 2019 - 09:32 PM

Follow up on testing of the American Mag silicone tires.   I put them on the test chassis and sanded them  to true them up a little and take the shiny off.    I cleaned track and tires and ran 4.4 laps, about the same as on the initial tests.   I changed over to the  silicone coated Pro Tracks  that I compare them to a few days ago.    I was able to lap at .3 faster with the Pro Track coated foam tires.   Both tires are same diameter.     It appears the big loss in the flat corner.   The solid tires  hang the back end out and don't grip as good as the PT tires in that flat corner.    I am assuming this is because they are just a harder tire and  the softer PT tires just corner better, they usually de-slot before the back end hangs out.

 

The Dow may be a good coating for a softer foam tire.

 

So much stuff to experiment with and so little time!!!


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#15 MSwiss

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Posted 12 September 2019 - 07:59 AM

On my Flat track, when we had weekly races for Classic Manta Rays, it was just the opposite.

The guys that had hard silicones, dominated over the guys who were running the Pro Track silicone coated sponge tires.

That's what killed the class.

The guys without the fairly hard to get, vintage AJ's, got tired of getting destroyed on the track.

It all depends on track conditions.

I understand you got to do, what you need to do, for your conditions.

Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#16 MattD

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Posted 12 September 2019 - 08:54 AM

The old Candies silicones always seem good, they are a little softer than  the other 60's silicones, I think.     As Mike says, nothing is the same on every track.    It could be the coat of permatex rubber that is built up on my track may inhibit the grip of the Dow silicone.    I may try coating tires with the Dow at some point.

 

I also have a few H&R foam tires I have coated.   They are not quite as smooth as the Pro Tracks., they seem just little bit harder.    they still race pretty close though.


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#17 Dave Crevie

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Posted 12 September 2019 - 09:21 AM

The RTV silicone does not cure through in thick cross-sections. Catalyzed is the only way to go for big and

wide tires. If you need a softer durometer, use GE 1000 series silicone. Alumilite has a soft two-part that

they call high resiliency that is very soft and can be purchased at Hobby Lobby. When I was casting tires

I used a thermo-setting version of the GE 300 series. It had exactly the right hardness and grip for the

plastic track cars. But when urethane came along, it was much better, but I bowed out of the market because

everyone was getting into it and the payback was minimal. 



#18 Bill from NH

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Posted 12 September 2019 - 11:23 AM

Cox silicones worked as good as Candies in the day, but they seem to chunk easier. My first two years of commercial racing ('67 & '68)  was done in 'silicone-only raceways."


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#19 MattD

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Posted 12 September 2019 - 01:22 PM

I got 4 pair of Silsliks in some stuff I bought a few years ago,.   Only one pair wasn't chunked  somewhere.    I used the old permatex and glue one tire back together to put it on a shelf car.  Obviously there were different compounds used by everybody back then.


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