[s-cars] Woah! pics link
QSHIPQ at aol.com
QSHIPQ at aol.com
Fri Jul 20 08:35:32 EDT 2007
Depends on how you make the bracket, and out of what Eric. I've got a
couple dozen of the Big Red kits running around right now, that uses a huge block
of tempered Al billet, and none of them are showing any signs of fatigue (as
far as I know) or stress cracking. I don't agree that steel is hard to
fabricate, you get good tempered aluminum, it eats up cutting bits really fast
(our machinist was swearing). We didn't use Aluminum for economy (it was way
more than the steel in price for the billet), Carl and I used that for a weight
target. IOW, the total weight of the G60 anchors was ~33lbs IIRC, the
weight of our big red kit was 32 and change, including 345rotors.
I just don't see all the fancy cuts in the aluminum on the ECS bracket not
one of the causes of the problem. I also wonder if some of this is due to the
lower deck height of the S caliper vs the Turbo Caliper. If the design of
the bracket was to use a fastener for the turbo caliper, and someone used an S
caliper, the bolt could bottom out. IIRCII, even if you 'hole tap it' the
standard metric 12mm Allen isn't threaded far enough up on the shank to not
cause some problems.
It's been a while since I looked at all this, Carl and I stopped producing
the kit ~2000. That said, I just serviced a set of rotors last fall on a 10
yo kit, and the brackets are still crack free. The rotor hats tend to be a
problem, but IME, all AL rotor hats with recessed mounting bolts are a problem.
BTST on a lot of different kits.
In a message dated 7/19/2007 10:54:50 P.M. Central Daylight Time,
gcmschemist at gmail.com writes:
Ah, but then there's "fatigue limit"
Aluminum doesn't have one. Steel does. IOW, at a certain level of
bending (stress), you can bend a steel part forever without fatigue.
Not so with aluminum.
Steel is hard to fabricate, while aluminum is frightfully easy.
Aluminum is often a very economical choice for parts-making.
************************************** Get a sneak peek of the all-new AOL at
More information about the S-CAR-List