I got a question along this...
I had the head on my 71 shaved .030, I got to thinking about the rocker
angle to the push rods.
I lowered the deck of the head but I didn't do anything to the rods, do I
need to shim the rocker pedestals up to make up the diff ?
-----Original Message-----
From: Carter Shore [mailto:clshore@yahoo.com]
Sent: Friday, March 02, 2001 8:16 AM
To: Terry Thompson; spitfires@autox.team.net
Subject: Re: duh my camshaft question
Terry,
I lived with an A-6 cam in a sreet driven Spitfire for
a year or so.
It was a basically race prepped 1147 motor. I commuted
in expressway and stop and go traffic, from the 'burbs
to downtown Miami, maybe 25 miles each way.
Yes, the idle was around 1000 RPM.
Yes, cold starts were tough (35-100F Miami weather)
Yes, mileage sucked (10-12 MPG)
Yes, I had to adjust the valves every month.
Yes, it was an absolute blast to drive, expressway
ramps, squirting through traffic, etc.
If I had it to do again, I would NOT use the heavy
duty clutch pressure plate. At the end of a year, my
left leg was larger than the right.
If you go this route, degree the cam for more torque
rather than top end HP when you install it. (can't
remember which way, advance or retard by a couple of
degrees).
Good luck
Carter Shore
--- Terry Thompson <firespiter@yahoo.com> wrote:
>
> And the camshaft question is;
> What are some of your recommendations for a
> streetable camshaft on an overbored block and higher
> (9.5:1 to 10:1) compression ratio, ported/polished
> head w/competition valves? I was planning on going
> with the comp prep manual of an A-6, but I've been
> warned against using it on the street (it's starting
> power range pushed up over a thousand rpms over a
> stock cam).
> Paul Tegler's got a good chart of cams, but the
> variety of "streetable" cams is a bit broad between
> manufacturers (especially for valve lift). And I'm
> wondering what some of the real world experience has
> been on the hotter cams your running.
> I'm sure a few of you have actually tried multiple
> cams and sort of have a line on the more affective
> cams. Paul?
>
> -Terry
> '76 spit 1500
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