.... Posted in the "CRC Front End" thread as well ...
Thanks to all for the input on the new Generation X and the Pro Strut front end. Obviously we have some very happy customers (thanks guys for your valuable input) and some drivers that are having some issues with the front arms.
After reading some of the input here on the forum about arms cracking when cutting threads with the cut-screw, we took some time and ran cut screws in hundreds of front arm mounting holes. We threaded them in straight as normal and we intentionally ran the cut screw “cross-hole”, angling the screw at a sharp angle to attempt to intentionally break the front arm hole. We used both the supplied “L” key as well as a hex driver to drive the cut screw into the arm to get a full idea if any particular method would cause a failure. The result: not one broken arm.
We cooled a number of arms in a freezer and we were able to crack one of the 12 holes we tried (6 arms). Only the very first hole in the frozen arm cracked. It seems that as the arms warmed up from being taken from the freezer, the plastic took on enough heat to stop cracking after the first hole.
The only other way we could get an arm to crack was to run the cut screw through so deeply that the countersink head of the screw forced the hole to widen, therefore cracking the arm.
The recent Snowbirds use round PVC pipe which is typically very tough on cars. The nature of the round pipe causes the cars to burrow under the equator of the pipe making the cars “stick” to the wall rather than glance off the wall. Many touring cars at this race suffered “C” hub failures because of this. However, a good majority of the competitors at the Snowbirds using the Pro Strut front end had zero failures. The drivers that did break arms were typically (but not always) using the red ride spacers which we are now phasing out in favor of flat graphite and/or soon to be released molded ride spacers.
The CRC Generation X with the Pro Strut front end ran very well, qualifying 1 through 4 in 1/12th stock. The same combination finished 1-2-3 and 5th. In modified, 3 Gen-X cars were in the A-final. In 1/12th oval, we had 2 CRC Razor II oval cars in that final as well, finishing 3rd on the podium, again with the Pro Strut front end. These good results prove the performance and race winning durability of the front end.
These cars were fitted with standard Pro Strut front ends, no fancy team plastic, just stock parts. If we were worried about the integrity of the arm, with the even slightest chance to lose this prestigious race because of a failure, the top 4 cars would have had some type of protective measure (bumpers, foam, something…). There was no need for this. Additionally, the top 4 cars in 1/12th stock were in an intense battle for the win. All 4 were Gen X cars with one non-CRC car getting in the mix occasionally. There were no team orders, these four Gen X’s were truly battling for the win. There were a number a big crashes and tangles between these cars in the A-final. Again, no failures with a complete CRC podium finish.
However, obviously from the feedback here, some are still having problems with the arm, so we will continue to work to improve the product. If you have an issue, pop us an e-mail at firstname.lastname@example.org
and explain the situation to us. How did the arm break? Where? What kind of barriers? Did you use the aluminum spacer or graphite shim? That is the information we need to make the best pan car front end even better. With all this internet chatter regarding the arm, we have yet to receive an e-mail regarding any issues.
As development goes on, we will make running changes to improve the performance and durability of the front end. Keep in mind, the former “standard” front end from Associated, went through many, many changes in both shape and material in its 14 year existence. The Pro Strut has been out since November. It has won and/or dominated all 3 large 1/12th races that have occurred since its debut.
Regarding the setups from the Snowbirds, look for data from the top cars at the event on the Team CRC site soon.
Thanks again for the support; you can count on CRC to deliver the finest products.