Gen's Jrx Pro project

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DerbyDan
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Re: Gen's Jrx Pro project

Post by DerbyDan »

geeforce59 wrote:Great! it seems that the X2 chassis is good for short technical coarse and the Pro looks good on long straightaways.....correct me if im wrong! :roll:
Its been too long since i've driven a graphite chassis JRX2 to comment first hand, but the general consensus seems to be that the 5-link gives lots of rear end traction - so the SWB chassis on a JRX2 is required to get the car to turn sharply. The grip on the rear is reduced with the H-arm set-up of a 'Pro' - so a long chassis is used to tame the steering & add stability over the bumps.

If your track is particularly tight & twisty - it might be best to run H-arm on a SWB chassis?

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Jirka
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Re: Gen's Jrx Pro project

Post by Jirka »

Here is "the official" bumper between chassis and front bulkhead mod scan:
Tech Sheet 2 march 1990 SCAN0212.JPG
And here is a little better pics from the 1989 ROAR Nats and 1989 Worlds cars:
1989 worlds Mike dunns car.JPG
1989 worlds Mike dunns car.JPG (16.71 KiB) Viewed 516 times
1989 worlds Mike dunns car.JPG
1989 worlds Mike dunns car.JPG (16.71 KiB) Viewed 516 times
1989 worlds Rick Bartolozzis car.JPG
1989 worlds Rick Bartolozzis car.JPG (25.44 KiB) Viewed 516 times
1989 worlds Rick Bartolozzis car.JPG
1989 worlds Rick Bartolozzis car.JPG (25.44 KiB) Viewed 516 times
1989 worlds Ron Rosettis car.JPG
1989 worlds Ron Rosettis car.JPG (25.25 KiB) Viewed 516 times
1989 worlds Ron Rosettis car.JPG
1989 worlds Ron Rosettis car.JPG (25.25 KiB) Viewed 516 times
Jacks car on C P cover.jpg
Jacks Jrx2 1.JPG
Jacks Jrx2 1.JPG (26.3 KiB) Viewed 516 times
Jacks Jrx2 1.JPG
Jacks Jrx2 1.JPG (26.3 KiB) Viewed 516 times
Jacks Jrx2 2.JPG
Jacks Jrx2 3.JPG
Jacks Jrx2 3.JPG (24.55 KiB) Viewed 516 times
Jacks Jrx2 3.JPG
Jacks Jrx2 3.JPG (24.55 KiB) Viewed 516 times
To me all the cars above seems to have 30-degrees kickup in the chassis without the bumper mod.

Jirka

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geeforce59
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Re: Gen's Jrx Pro project

Post by geeforce59 »

Some photos of the Jrx2 turns Pro....almost :mrgreen:
Image
Image
Image

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