In a message dated 5/29/2003 6:45:55 PM Pacific Daylight Time,
saltracer@hotmail.com writes:
> We are going to run a blower this year on our flathead roadster. XF/BGMR to
>
> be exact. The rulebook states "SFI type blower restraints shall be used on
> all vehicles using positive displacement blowers." Does that mean the
> restraints just have to be designed and look like the SFI rated blower
> restraints available? Phil
Phil,
We went through the same thing with our blower motor. The biggest problem
we ran into was getting the blower restraint attach plate that goes between
the blower and the injectors. Nobody that I could find made one for the 4:71. I
finally talked one of the LA speed equipment guys into faxing me a drawing of
one and we fabbed it ourselves.
Regards the straps themselves, they came from the same outfit and have no
SFI markings or label. Same for the fire-proof sleeves that cover the straps.
We've been through several NHRA tech's with it and never questioned.
I know that SCTA is a little more lenient, but I'd do as Glenn suggested
and get the best stuff. Also, make sure you have an operating pop-off system.
I'd suggest the SFI burst plate and put it on the front of the manifold,
pointing away from the driver.
In 2001 at Speed Week we had a "big-bang" on the long-course right in
front of Glenn at about 200 and over 20psi of boost. The burst plate did its
thing and the only damage was to the drivers underware.
In 2000 we had the engine in a front-engine rail and were using a
home-made burst plate that turned out to be too thick. The engine backfired
just
before the lights at about 170, the burst plate didn't, the blower belt didn't
break, so the blower snout broke off and the car ran over it. Kinda hard on the
chassis, body, header, slick, and again the drivers shorts...............Ardun
Doug King
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