sounds like a damn fun project engine to me if i had the money to do it...
i still am working on the front spring weight considerations. the ro-spit
was using 350 lbs, went to 500, and is going to 550. when i do the math for
wheel rate taking into consideration for wheel motion ratio and spring rate,
the formula says we should use 500-550 springs. (ratio is wheel rate=spring
rate/motion ratio squared) I was given this formula by a DM guy who
trophied at nationals. He says we need a wheel rate of about 200-250 for
autox, which gives the springs i suggested above. it seems like they are so
heavy in comparison to the stock spit 180 lb springs. Ted Schumaker says to
start at 300 and move up. The spit prep manual suggests 433 lbs. So where
to go, i am not sure. I am not changing to a 1inch roll bar, so i need to
change all in the spring rate.
btw, the motion ration for the front wheels that i measured is 1.6 spring to
wheels ratio.
jim
----- Original Message -----
From: "Joe Curry" <spitlist@gte.net>
To: <gripdad@earthlink.net>
Cc: "James Libecco" <jfl@neoucom.edu>; "spit" <spitfires@autox.team.net>
Sent: Monday, January 03, 2000 1:40 PM
Subject: Re: wanted
> Bill,
> Is that the "recipe" that I am supposed to follow in the build up of my
> Tiny Tim Race Car project? :)
>
> Joe
>
> Bill Manning wrote:
> >
> > A 1296 cc small journal Spit engine with dual Weber 40 DCOE's, 13.5
to 1
> > compression, open header, full race cam with 1/2" lift and allot of
overlap,
> > Arias alloy pistons w/Carillo rods and TotalSeal rings, offset welded
heat
> > treated crank for more stroke, ported & polished head w/TR6 valves
running 110
> > octane leaded racing fuel will put out about 130 HP if you run 30º BTDC
timing
> > at about 7500 RPM. If I missed anything please let me know. -Bill
Manning- VARA
> > E/P #3 Spit
> >
> > Joe Curry wrote:
> >
> > > Jim,
> > > The other things can be had, but I don't think there is any way short
of
> > > swapping engines that you will ever achieve 160 HP from a Spit engine.
> > > Please somebody prove me wrong!!!!
> > >
> > > Joe
> > >
> > > James Libecco wrote:
> > > >
> > > > Hoping someone has stuff for me, I am looking for a oil cooler
sandwich
> > > > take-off plate, a rocker oiler kit, header (or at least a source on
a 4/2/1
> > > > header-preferably not stainless steel like the TSSC produced
products), and
> > > > a secret way to make 160Hp.
> > > > If you have anything around, LMK.
> > > > Thanks,
> > > > jim
> > >
> > > --
> > > "If you can't excel with talent, triumph with effort."
> > > -- Dave Weinbaum in National Enquirer
>
> --
> "If you can't excel with talent, triumph with effort."
> -- Dave Weinbaum in National Enquirer
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