Quote:
Originally Posted by D-CEL
Brent,
Yes Quicktime advertises that and it leads many people (including retailers like yourself) to believe it to be true.
Why dont you call Ross McCombs and ask the question. What exactly does “passed SFI testing” mean?
Ask him part # RM-8010 has been tested by SFI and what the results were.
FYI, SFI 6.1 is the lowest level of certification for a housing.
Well lets talk about containment. Oil pans do exactly what they are designed for, containing oil. They were not designed to contain connecting rods during a failure.
However, Explosion proof bell housings were designed to contain exploding flywheels and clutches and to save the limbs and lives.
The only job of the housing is to contain the pieces, it can be completely destroyed, so long as nothing escapes containment it has done its job. The reason they created the SFI was to ensure continuity. So that the consumer knows they were getting the minimum level of safety they had paid for. That pretty sticker means exactly that.
There is a reason SFI requires the 8, ½ -13 grade 8 lower containment bolts, they effectively create a box around the flywheel. With no lower bolts, there is no support on half of the housing. It is a clam shell that is easily pried apart and worse it’s held together by brittle cast iron or aluminum of the block.
To infer that both designs offer remotely similar containment is ludicrous.
once again, im fine with a lighter, smaller part for ground clearance or whatever, just dont mislead the public by say "has passed all SFItesting"
jason |
I have talked to Ross on many occasions and we have had this discussion. He has told me all of his bells will contain a flywheel explosion at 10000 rpm.
A block plate (on an SFI 6.1 bellhousing) bolted around the bottom will keep the flywheel from exiting towards the bottom. It's not going to do anything to keep the threads from pulling out of the block at the top and separating the bellhousing from the rest of the engine.
We can argue this all day until we're blue in the face, but to me, it's a clear case of:
"I had a rattlesnake in a bag and the bag failed, causing the snake to get away."
"Well what happened? Did the bag split open or break?
"No, I dropped it and the snake got out."
Ross says that during SFI testing, the bellhousing is bolted to a 1" thick piece of steel. I'm not sure if all the mounting bolts are nutted or captured in threads (maybe you can answer that for us), but would it be the bellhousings fault if the bolts stripped out of the steel and caused a flywheel to escape? No, of course not....I would think that the SFI engineers would find a better way of conducting that test.
If you want to paste everything that Ross said in response to you, over from the 460 forum to here (well maybe into a separate thread), feel free to do so. However, this thread wasn't intended to be an in-depth discussion of Quicktime bellhousings.
It may also be fair to inquire to see if there has any been any failures with a Lakewood or McLeod bellhousing: particularly with 460 blocks since that's the only time I've ever heard of this kind of event happening and their specific design at the top of the block seems to cause a weakness.
If we had to have a beef with every manufacturer who has had a faulty part (again, I'm not saying Q/T is guilty in this), then we wouldn't be buying from anyone.
Lastly Darren, I hope you haven't taken any of this the wrong way. I'm not trying to be a punk by any means. However, looking at all of this fairly, I just simply don't agree with you.
TKB - Not that I'm aware of.