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Classic Asp and Manta Ray info


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#1 gas

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Posted 10 February 2019 - 03:11 PM

Hi all, I'm scratch building a Competition Asp, need to know what the wheelbase is? For the Manta Ray, what is the size of the front and rear tires and wheels, diameter and width? Thanx.


George Ewing




#2 Ramcatlarry

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Posted 10 February 2019 - 03:28 PM

The body determines the WB.


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#3 gas

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Posted 10 February 2019 - 04:03 PM

The Asp can be up to 5 inches, way too long. I would like to use the original wheelbase. I know the Manta Ray body will determine its wheelbase. Thanx.


George Ewing

#4 Maximo

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Posted 10 February 2019 - 04:46 PM

George,

 

I do not know the specifics of the Classic Competition ASP RTR, however measuring the body it appears as 4" up to 4.5". 

 

Hope this helps!

 

maximO

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#5 olescratch

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Posted 10 February 2019 - 06:23 PM

I tried to obtain the best measurement possible, I get 3.7".


John Stewart

#6 don.siegel

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Posted 10 February 2019 - 06:25 PM

I've got a wheelbase of 3-11/16" on my Competition Asp. vs/ about 3-13/16" on the regular Asp. 

 

Assuming my Manta Ray has the original wheels (6 spoke, bare aluminum), the rears are 1-1/4" diameter and 3/8" wide on the tread (overall width a bit larger). The fronts are 1 x 1/4", or maybe a touch larger. There were a number of different versions on the Manta, so this may have changed. 

 

Don 



#7 gas

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Posted 10 February 2019 - 06:58 PM

Thank you gentlemen, this will be very helpful.


George Ewing

#8 mike1972chev

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Posted 10 February 2019 - 08:48 PM

George,I will send you some EXACT measurement tomorrow. I have had a beer or two tonight. ;)


Michael J. Boruff


#9 Martin

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Posted 10 February 2019 - 10:57 PM

May I add the guide pivot to rear axle has a greater effect on handling than w.b. So I would max that dimension, but still fit guide under the body IMO.


Martin Windmill

#10 gas

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Posted 10 February 2019 - 11:21 PM

Thanx Mike. Martin, I was thinking about an inch longer than the wheelbase, sound good?


George Ewing

#11 Martin

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Posted 11 February 2019 - 01:12 AM

7/8" of guide lead is not uncommon for a light open wheel car.

 

Maybe check what has worked before here http://slotblog.net/...assis-drawings/

 

I like the specs of this classic http://slotblog.net/...kras-4-rail-f1/


Martin Windmill

#12 Rick Moore

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Posted 11 February 2019 - 03:46 PM

George,

 

I recently built a rather non-vintage anglewinder chassis for a Competition Asp body (posted over in the SB Scratchbuilding sub-forum in the CMF3 'just for fun' chassis thread) where the wheelbase is 3.875”, rear axle to guide pivot is 5.00”, and resulting guide lead of 1.125”. Admittedly unconventional, but I like the way it came out aesthetically and functionally.

 

Have fun!

 

Rick / CMF3

 



#13 mike1972chev

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Posted 11 February 2019 - 04:45 PM

Ok George ,This is what measurements  I got on mine. These are 100% STOCK with ZERO modifications done to any of  them.

 

          ASP              3 7/8" inch wheel base.

 

Copetition ASP       3 11/16" inch wheel base

 

Manta Ray              4" inch wheel base.

 

As for the tire diameter on the Manta Ray , Don Siegel nailed it as far as i am getting. 


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Michael J. Boruff


#14 gas

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Posted 11 February 2019 - 05:15 PM

Rick and Mike thank you for your help. This is going to be interesting!


George Ewing





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