Jeff,
Here is a short list of the things I have done to my '74 to give it a bit of
pep.
Fitted a DGV Webber, tuned by my local speed shop.
4-2-1 Stainless header matched to a twin Rimmer Bros Stainless exhaust.
Crane electronic ignition
40,000 volt Crane coil.
Platinum plugs, gapped at .050
8.0 MM Plug wires
Installed electric fan, removed the pulley one.
Matched intake and exhaust ports with manifolds.
3 angle valve job w/ swirl top intake valves.
Smoothed exhaust ports.
Double valve springs.
Installed cup type valve seals
There are a few other things I did but they involve an engine rebuild.
I'm also working on an Induction system (Like the one Joe has) to fit the
DGV, that should add a bit more life to the 'ole girl.
I have read and have been told that the better an engine breathes the more
power you can get, that is why I did so much to the head.
Check out the Comp Prep manual for your specific year model and you will
find all sorts of good info.
Good Luck
Nick
N.A. Campiglia III
Abilene, TX
'67 Spitfire MKIII
'74 Spitfire 1500
http://camalott.com/~spitdrvr
----- Original Message -----
From: Jeff McNeal <jmcneal@ohms.com>
To: Banbury, Terrence <Terrence.Banbury@dnr.state.oh.us>;
<spitfires@autox.team.net>
Sent: Monday, April 17, 2000 4:40 PM
Subject: Re: More power
>
> Count me in with this!! The only difference is, I've got a Weber DGV
> conversion already and the
> L-O-U-D Monza exhaust (that I think the fiberglass fell out of years ago).
> My Spitfire is still a slowpoke.
>
> Same engine. Except mine is the English home market high compression
> version.
>
> A good friend who has worked on the car with me suggested that I start by
> performance tuning my Weber and that it's probably set up for good mileage
> rather than performance. Of course, I have no idea where to begin. I had
> an inkling of how to tune twin SU's from having owned another Spitfire and
> MGA, but it looks like I need to buy a book on the Weber and go from
there.
> Of course, a new set of plugs probably wouldn't hurt -- and a Pertronix
> electronic ignition is on my future shopping list, too. But right now, I
> gotta take care of my TAXES. ARGH!!!
>
> Best wishes,
>
> Jeff in San Diego
>
> '67 RHD Spitfire Mk3 aka "Mrs. Jones"
> Jeff's Classic '67 Spitfire Mk3 site
> http://www.ohms.com/spitfire/spitfire.shtml
> home of the NEW Totally Triumph Auction
> "By Triumph enthusiasts, for Triumph enthusiasts"
> http://www.ohms.com/cgi-bin/TRauction.cgi
>
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>
> ----- Original Message -----
> From: Banbury, Terrence <Terrence.Banbury@dnr.state.oh.us>
> To: <spitfires@autox.team.net>
> Sent: Monday, April 17, 2000 1:13 PM
> Subject: More power
>
>
> >
> > I love cornering, but would like more speed in the straight-away. How
can
> I
> > obtain this without major engine modifications? I have a stock Mk III
> > 1297cc HE with twin SU carbs.
> > What types of things, in order, of money and time, would produce a
faster,
> > more responsive performing car?
> >
> > Replace stock air filters with..what?
> > Use lighter weight oil in carb damper?
> >
> > Free-flow exhaust?( Would this be a noticable increase in power or just
> > sound like it is.)
> > Headers?
> >
> > Supercharger? ;-)
> >
> > I don't want to swap engines or rebuild the one I have, I basically want
> > every horse out of it that I can get, short of engine mods (cams,
boring,
> > etc.).
> >
> >
> > Terrence N. Banbury
> > 1967 SPITFIRE MK III
> > 1988 Honda Accord lX
> > 1998 Ford Expedition EB
> > 2000 Ford Mustang GT
> > 1973 Honda CB350G
> >
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