[trackbird]

Guys, I'm getting setup as a dealer with Hellwig products. As usual, I like to try to save the racers money and I like working with companies who make stuff we need. Hellwig has been willing to listen to us, ask our opinions and they are even looking into making this bar available for us without the end links for those who want it that way. I do not have price sheets, but if you tell me what you want (and their part number so there is no confusion) and I'll get prices.

Edit:

And, you can order them through me. I spoke with Dave about pricing and I can do them for $229 + freight (retail is $259 + freight). This is the price for the kit with end links. We still have to see if it will be practical to do the kit without end links, so I don't have a price on that setup yet.


Lets give this until May 30th and we'll get ready to order. PM me for paypal info or to mail a money order.

So far I have Tommy 55 down for one bar without end links. How many of these might we need total (how many other bars and I know Mitch was looking for stuff for his tow rig)?

Prices for Mitch on 7676 and 7677.

[JimMueller]

Looking for an adjustable rear bar with heim joint end links to use with my current PHB lowered 4" OR for future use with the watts link Sam is selling. I would like it to be adjustable to mimic a 21-25mm solid bar range. Do the Hellwig bars offer this?

[trackbird]

Looking for an adjustable rear bar with heim joint end links to use with my current PHB lowered 4" OR for future use with the watts link Sam is selling. I would like it to be adjustable to mimic a 21-25mm solid bar range. Do the Hellwig bars offer this?

From here:

http://www.frrax.com/rrforum/index.php?sho...mp;#entry125364

Sean's calculations are as follows:

The adjustment hole center-to-center spacing looks like 2xdiameter. What is the bolt size? It looks like about 3/8". [nope, it's 7/16" on 1" centers - see Dave's post #66 below]

Ignoring bending in the arm, stiffness is proportional to D^4 (D=bar diameter), or (Dod^4 - Did^4) for a hollow bar. It's also inversely proportional to the square of the arm radius, so changing the radius changes the stiffness by a factor of (R1/R2)^2.

Assuming the arm radius from the centerline is close to 8.5" for the center hole (R1), like a stock bar, the inner (rear) hole changes the stiffness by ~1.28x and the outer (front) hole changes the stiffness by 0.8x.

The relative stiffness of a bunch of bars is as follows. This is only the D^4 term, so the actual rate is proportional to these numbers. Since some bars may be identified in metric dimensions but made from inch-dimensioned stock or vice-versa, there may some minor discrepancies. I assumed 4mm wall thickness for hollow rear bars.

456976 - 26mm solid
416231 - 1" (aka 25mm) solid
331776 - 24 solid
324568 - 1" hollow
279841 - 23 solid
243987 - 7/8" (aka 22mm) solid
194481 - 21mm solid

For the 7/8" bar:
312303 - inner/rear hole
195190 - outer/front hole

As Dave said, those are in the ballpark of the 23mm [actually a little closer to 24mm] and 21mm solid bars, respectively.

For the 1" bar":
532776 - inner/rear hole
332985 - outer/front hole

I'm using the Hotchkis rear bar now, so an adjustable 15/16" (24mm) bar would be perfect (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) (IMG:http://www.frrax.com/rrforum/style_emoticons/default/wink.gif)

Homebrew adjustable links to get rid of the poly will stiffen those numbers a little. The stock-style links with poly bushings that most of us use will soften those numbers a little. So will the Hellwig-supplied adjustable links with poly bushings, but I don't know how the two compare.

And here:

http://www.frrax.com/rrforum/index.php?showtopic=12168

We're trying to find enough buyers to have a batch of larger rear adjustable bars done.