[Spits] 1300 vs 1500 manifold

[Joe Curry]

When I first built the 1296 engine for Tiny Tim, I decided to use a large
valve 1500 head.  In doing some measurements I discovered that the
combustion chambers of the 1500 head were much deeper than the 1300 ones and
if I did nothing to it, the compression would be extremely low.  Shaving the
head on the order of a quarter inch achieved the compression ration that I
was seeking.  I sourced pushrods from Ted Schumacher to achieve the correct
rocker geometry.  I also had Ted get me a set of Isky dual valve springs and
roller rockers to complete the upgrade.

Joe

-----Original Message-----
From: spitfires-bounces at autox.team.net
[mailto:spitfires-bounces at autox.team.net] On Behalf Of
celiracer81 at hotmail.com
Sent: Monday, June 04, 2012 9:01 AM
To: spitfires at autox.team.net
Subject: Re: [Spits] 1300 vs 1500 manifold

I have reason to believe that the head on my '68 is from the DPO's 1500.  no
problems with the exhaust or intake manifolds fitting properly.  I did have
some issues with the length of the head bolts though.

> Date: Sun, 3 Jun 2012 10:45:11 -0600
> From: mark at bradakis.com
> To: spitfires at autox.team.net
> Subject: Re: [Spits] 1300 vs 1500 manifold
>
> Dave wrote:
> > will an su intake manifold and carbs bolt up to a 75 1500 engine?
anyone
done
> > that?
> >
>
> Yes.  Yes.
>
> mjb.
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