18 replies to this topic

[MSwiss]

I'm reposting this separately, so guys can find it easier, and I can answer questions in a single thread.

Tech for JK Spec and JK Super Spec will start at 11 AM.
Entrants for JK Spec will be limited to racers not on the GTC-PD list.
JK Spec entrants will be limited to using the original JK Can-Am chassis with the same building restrictions.

Entrants for Super Spec will be open, but you can't enter both.
Super Spec entrants will be allowed to run either the original chassis or the new D3X25R, built in an .062" or .078" monorail configuration, and the pans unmodified except for rear tire clearance. Super Spec racers will be allowed to use rear axle BBs and BB front wheels in either style chassis.

Hand-out Hawk 7s will be used in both classes with 7 tooth, 48p pinions required. A new twist for 2012 will be racers can use a 27t or larger crown gear. They cannot use a smaller crown, i.e. a 26t.

[MSwiss]

One thing that wasn't perfectly explained was on the bracket.

The JK 3/4" bracket, like that comes in the kit, must be used, unmodified, except for slight tweaking to square
it up to the Brackagra.

The motor doesn't need to be screwed in, but if soldered, must be positioned flat up the bracket face.

IOW, in the hypoid position.

Guys choosing to run this chassis on Saturday or Sunday, of course can open up the bearing hole after the Super Spec race, and solder up the motor at an angle in the straight position.

[Ron Hershman]

OK so are we using the Current JK Spec "CUP" rules for the chassis building requirements?

[MSwiss]

When I get a chance later, I'll give them a quick look and see if all the rules will apply to the Super Spec and the X25R.

My guess, not.

IIRC, JK Spec "Cup" requires hinged pans or a torsion car.

The X25R is set up to be a Shaker.

[Ron Hershman]

OK but they have to be built as single rails per side ( mono rail ) and with a minmum dia on the main rail(s) wire size correct?

[MSwiss]

Yes.

That info's already in the first post.

[MSwiss]

For those planning to run this class,
I would hold off on building until I get the time to post some more detailed rules.

When I announced the class, the chassis wasn't available.

And not that it is, I've been busy shipping them.

[MSwiss]

and the pans unmodified except for rear tire clearance.

FWIW, the other building restrictions coming up will render any reason to trim the back of the pan for clearance unneeccesary.

Thus I will be dropping "except for rear tire clearance."

IOW, the pans, like the rest of the chassis parts, will not be allowed to be modified except for opening the area the main rails fit in, if .078
rails are used.

[Ron Hershman]

So NO trimming anywhere on the the pans even if it enhances "back and forth" movement of the pans?

Can the bent and formed uprights be "cut off" the nose/center section or can the uprights be cut off the pans?

What if the builder wants the axle to be mounted just using the center/nose uprights? Can the uprights on the pans be cut off?

I think I am explaining this best? LOL

Or does the axle need to go through all the uprights on both the pans and the center/nose?

[MSwiss]

The set of uprights not being used of course will have to trimmed off for pan movement.

I did get a chance to look at the existing JK Spec Cup rules and they don't cover all
the elements of the X25R.

It's going to require a special set of rules which will require a bit of thought to cover everything.

Give me a few days.

[kvanpelt]

A couple questions!

Will the BRP front axle be allowed?

Is there an axle tube supplied in the old style kit and does it need to be used? OOps, forgot the most important, can the kit be made with a shaker plate? IOW, does it have to be torsion or hinged or plumber?

[John Miller]

The set of uprights not being used of course will have to trimmed off for pan movement.

I did get a chance to look at the existing JK Spec Cup rules and they don't cover all
the elements of the X25R.

It's going to require a special set of rules which will require a bit of thought to cover everything.

Give me a few days.

Mike, anything on this yet?

[MSwiss]

I 'll make a a conserted effort to get them up tonight.

[MSwiss]

A couple questions!

Will the BRP front axle be allowed?

Is there an axle tube supplied in the old style kit and does it need to be used? OOps, forgot the most important, can the kit be made with a shaker plate? IOW, does it have to be torsion or hinged or plumber?

Yes, the BRP axle will be allowed in either JK Spec class.

See
http://irraslotracing.com/id56.html
for rules using the old style kit.

[kvanpelt]

Thanks for the link Mike, it clears most questions up except the axle tube. Wasn't sure if they came with the kit or I bought some of your pre cuts. Basicly looking at some of my older stuff from Sano III to see if they would pass tech in Super Spec. I have one that would pass, but I left off the axle tube and installed bushings directly in the motor bracket.

[MSwiss]

Looking at the podium cars from last year, the top 2 appear to use collars.

But that doesn't mean they don't have axle tubes.

They might just be real short ones.

I'll make sure Noose sees this thread and has a chance to comment.

[Noose]

Axle tubes are required per the rules on the regular JK Spec.

2m. The motor bracket must support the motor and the axle tube must pass through the motor bracket.

[kvanpelt]

Thanks Guys.

Axle tube requirred for old chassis, not requirred for the new.

[MSwiss]

Not required for Super Spec, but IMO, with a 3/4" wide bracket, not recommended.

Having your bearings spaced that narrow is an invitation for a bent axle.