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Something a little different - Weightshifter 3.0 chassis


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#1 Jay Guard

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Posted 10 July 2019 - 05:36 PM

Something a little different, thought this might be interesting for some.  

 

With this chassis you can adjust the weights trackside with your tire tool without even taking the body off, and they can even be adjusted between (or during) heats in seconds. Great for back-to-back comparison of different weight locations. This is something of a proof-of-principle prototype and the next version will probably be a good bit more elegant.

 

IMG_2029.JPG

 

IMG_2028.JPG


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#2 Matt Sheldon

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Posted 10 July 2019 - 05:38 PM

Great concept and thinking, Jay.


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#3 Greg VanPeenen

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Posted 10 July 2019 - 05:52 PM

Nice, Jay.
 
Would be great for a test vehicle. Love your advanced thinking.  
 
Nice to see someone who is not stuck in the past.
 
Regards,
 
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#4 Pablo

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Posted 10 July 2019 - 06:02 PM

:good:  :heart:  :heart:  :heart: 


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#5 MSwiss

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Posted 10 July 2019 - 06:17 PM

Very cool.

Looks like the weight adjustment is painless.

What do you stick in the hole to lift the wire and move the pan?

A piece of wire, or a small screwdriver?

Mike Swiss
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Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
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#6 SpeedyNH

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Posted 10 July 2019 - 06:53 PM

Way cool.

Tire wrench?


Steve Lang

#7 Jay Guard

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Posted 10 July 2019 - 06:56 PM

Mike:

 

You can use your tire tool (.050" allen) or just a piece of .062" wire with a flat end. I meant to say "tire tool" as opposed to "tech tool" in my first post (which I've changed).


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#8 havlicek

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Posted 11 July 2019 - 04:22 AM

Very cool concept, Jay... and overall chassis, too! Being able to shift the weights asymetrically makes it even cooler!


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#9 Bill from NH

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Posted 11 July 2019 - 06:02 AM

Jay, why six weight position notches on the right side and eight on the left? Are there no tracks where you might use a neutral setting?

 

It's a neat idea, hope it works out well for you.


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#10 slotbaker

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Posted 11 July 2019 - 06:18 AM

Looks like left side is adjusted long, and right side short, so could be same number of adjustments either side.

Just showing possible mix of adjustments?

:huh:

 

Nice idea.


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#11 Jay Guard

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Posted 11 July 2019 - 08:53 AM

Bill:

Steve King got it right in his response, there are an even number of adjustments on both sides. In fact there are quite a few you can't see that are covered up by the sliders.

 

Weightshifter prototypes 1.0 and 2.0 had single movable weights on each side and I found that you sometimes wanted weight both front and rear hence the two independent weights on a side now. Of course the weights can always be moved next to each other and adjusted as one if you so desire.


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#12 Bryan Warmack

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Posted 11 July 2019 - 09:40 AM

Awesome build!



#13 Eddie Fleming

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Posted 11 July 2019 - 10:02 AM

OK, my question is: How many people are trying to build one of these now that the idea is out? 

 

I am not. Great idea, Jay, 


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#14 Dominator

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Posted 11 July 2019 - 11:28 AM

Very cool, Jay!


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#15 JerseyJohn

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Posted 11 July 2019 - 12:37 PM

Wow. Very innovative. Soldering work is beautiful.

 

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#16 Pablo

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Posted 11 July 2019 - 07:27 PM

Jay, I'd love to know approximately where the fore/aft balance point is with the shifters in their central positions.

Don't know if I worded that correctly?  :unknw:

 

The more I look at it, I have to think this is going to catch on big time  :good: If you go public, I'll buy lots of stock  :D


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#17 Jay Guard

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Posted 11 July 2019 - 08:24 PM

Thanks Pablo!  I'll check and see where the balance point is at "center" (what ever that is) but since it can be so easily changed it's kind of a unknown  point, nonetheless I will get it for you.

 

And yes,  it is really cool to be able to change the weight balance on-the-fly to handle changing conditions, easy to change even between heats with just a tire tool, it really is just that easy.  As for going public with an IPO you'll be the first to know.  Maybe they'll call this one a "J-Car".  :D


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#18 Jay Guard

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Posted 11 July 2019 - 08:31 PM

OK, my question is: How many people are trying to build one of these now that the idea is out? 
 
I am not. Great idea, Jay, 


Hi Eddie:

Yeah, there are a lot of "fiddley bits" (as the British say) to this one as it stands.  

But, as I said, it is a bit of a working prototype and I have already figured ways to make it a lot cleaner.  Weightshifter 4.0 will be the same concept but much more refined and race-worthy.

I will be testing/running this one at the next GRRR race coming up weekend after next so it will be interesting to see how well it works. Testing on my home track is "encouraging"!


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#19 MSwiss

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Posted 11 July 2019 - 09:03 PM

And yes,  it is really cool to be able to change the weight balance on-the-fly to handle changing conditions, easy to change even between heats with just a tire tool, it really is just that easy.  As for going public with an IPO you'll be the first to know.  Maybe they'll call this one a "J-Car".  :D

I think it will be most useful, moving the weight forward, as the track tightens up, especially at big events.

 

With no tire changing in Retro, I think that's an overlooked thing in Retro racing.

 

Mid-race tuning.

 

IMO, I tuned myself on to the podium (barely), at the last two Sano Can Am races.

 

I quickly trimmed / chamfered one tire, with scissors, after running Red, and did it a little more,after Green, going to the locked lane, Blue.

 

With your set-up, you can probably achieve the same thing, clicking the weight up a notch, or two.

 

Also, you might be able to bias the weight, back and forth, on either side, depending on what end of the track you are on.

 

PS-I would come up with a less cryptic name than a J-car.


Mike Swiss
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Two-time G7 World Champion (1988, 1990), eight G7 main appearances
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Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#20 Jay Guard

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Posted 11 July 2019 - 09:06 PM

Mike:  Well Weightshifter does seem a bit long winded but I'm NOT going to call it a "Swiss"!! :D


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#21 MSwiss

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Posted 11 July 2019 - 09:07 PM

I was referring to Ken Miles / J-car.


Mike Swiss
IRRA® Components Committee Chairman
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Two-time G7 World Champion (1988, 1990), eight G7 main appearances
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Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#22 Jay Guard

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Posted 11 July 2019 - 09:10 PM

OK, how about a "WSJ"? (Just messing with you Mike!)


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#23 MSwiss

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Posted 11 July 2019 - 09:26 PM

Much better.

 

When I hear Ford J, all I think of , is an ill fated design.

 

Speaking of messing with the other guy, I'll have to dig up where you thought I was making Retro too complicated/high tech, with my low CG guide. LOL


Mike Swiss
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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


#24 Jay Guard

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Posted 11 July 2019 - 09:31 PM

Hey, anybody can build one of these with just a little piano wire, brass, lead, and, of course, a Swiss motor bracket.
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#25 MSwiss

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Posted 11 July 2019 - 09:36 PM

And I'm using a nuclear reactor to make guide shoes. LOL.
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Mike Swiss
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






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