Quote:
Originally Posted by Cooper
Hasn't there been a bad batch of chassis' that broke more easily? (1 or 2 years ago)
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Quote:
Originally Posted by NeilRalph77
I've broken two when running with a brass bulk head, i now stick strictly to the plastic bulk head and choose to add weight else where, having said that I've seen the B4 & .1 break in exactly the same place. But then they are the same shape at the front.
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Quote:
Originally Posted by canon67
A ok the mold temperature to plastic flow yes I no about that I have machined in the past for a mold company and I now about this ok makes sense, I have modified this king of plates, you should suggest for smother
finish for the far away parts for essayer flow and les in the closer to inlet. You should go to a multiport injection will be much more efficient.
Ok well it explains all no worries bud. I am still an X fan.
Cheers Love to see you up in Ottawa.
Den. 
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Hey Guys,
Chazz asked me to read through and I wanted to post a comment or two.
The carbon chassis are naturally more brittle than the plastic ones, and two years ago I saw a few that broke suspiciously. I don't think we got a bad 'batch' of them, but more along the lines of what Chazz explained - a few were not quite as good as the majority. I spoke to our chassis supplier about the issue before a run in 2010, and we've heard very few complaints since. Another run was made this past summer and appear as good as the last batch.
I have not seen this problem with our plastic chassis. That's not to say the plastic chassis won't ever break, but I've never seen it happen without another part at fault (make sure your front bulkhead and top plate are in good condition and NOT STRIPPED OUT) or one heck of a spectacular wreck (like when a B44 jumped across a lane and hit my car going full out on the straight at a club race back in February). As Neil mentioned, running an aluminum or brass front bulkhead can put extra stress on the front end - take extra care that the top deck fully seats into the bulkhead, and the 7 screws snug down well (4 from the bottom and the three behind the shocktower). Also, check those 7 screws occasionally - mine work loose over time, and a quick half-turn with the wrench once a weekend helps keeps things tight.
Overall, if you feel your chassis has failed due to a quality issue, please don't hesitate to contact us - PM me, email myself or Chazz, or give Darren at DMS a ring. We're hear to make cool cars that the XF Family can enjoy and go fast with, not cause headaches with poor quality or try to get rich on excessive parts sales.
As always, thanks for everyone's support!