Jim,
As to gearing... with the '76 you've got the tallest rear diff offered, so
the only way to get more speed is either a) raise the "redline" on the
engine (balance and lighten within the rules) or b) run taller tires.
As to induction...
I'm having to consult my '98 book (the '99 rules are in the tow-beast)...
Under the 1998 rules, section 14.10c, "Carburetors, fuel injection,
intercoolers and intake manifolds are unrestricted." I don't recall seeing
this change for 1999 and I haven't seen a proposed change in Sportscar for
2000.
Here in Texas Region (Dallas area) the DSP Spitfire that typically comes out
runs twin Weber 40 DCOEs. On Hoosier autocrossers he's about 3 seconds (on
a 70 second course) faster than my '76 DP/DM car.
I say DP/DM as the car was prepped to DP 1992 rules... the single DCOE
knocks me to DM. And I'm running Goodyear FC takeoffs... not the optimum.
At the large site that SCCA uses here I've also had to run 3rd... you just
get used to slamming it up and bringing it back to 2nd for the tight
corners. Make sure your clutch hydraulics are all in good shape and
disengaging properly. And be ready to rebuild the trans after the season is
over.
Cheers,
Jim
Dallas TX
> -----Original Message-----
> From: owner-spitfires@autox.team.net
> [mailto:owner-spitfires@autox.team.net]On Behalf Of James Libecco
> Sent: Monday, November 01, 1999 4:21 PM
> To: spit
> Subject: to those autox-ing spits
>
>
>
> I am starting into my winter of buildup and wonder what everyone else is
> running in there autox spits. Right now I am bone stock, other
> than a worn
> spring I put in to drop the rear end. My greatest concern is power and
> gears. Even with my wimpy 76 9:1 engine, I am running out of gear on most
> of the (few) courses I have driven, wondering how I can manage a shift in
> and out of third gear.
>
> that's problem one. now two. If I go to street prepared, i
> read the rules
> to allow backdating of the engine. If so what is the ideal carb
> set up? my
> guess would be 1.5" SU's. If so, then I need a cam, but cams are "must be
> of original manufacture". If this is the case, and the case is to allow
> back dating of the engine, then what is the ideal cam to put in my engine.
>
> suspension wise, I think I know where I am going for now. its
> just getting
> the power to put the handling to the test.
>
> jim libecco
> 76 spit who hates getting beat by cars with 200% more horsepower
> in the same
> class....
>
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