[Spits] Cam Bearings in 1500

[Bill Gingerich]

Was it the #3 rod?

I've never seen bearings for what you're talking about.  It seems like an
awful lot of work to avoid finding a small journal cam.  Perhaps your
existing cam can be machined down to the correct size.  But I'm with Joe on
this one - leave the block alone.

If you haven't already, seriously consider enlarging the oil galley in the
block as per the competition prep manual.  It helps that #3 rod bearing live
longer.

I don't know if there is a trick to putting the bearings.  I was considering
doing this when I did my 1500 several years ago, but decided to let it ride.

Joe - any wisdom on installing the bearings in the block?

BillG
74 Spit


-----Original Message-----
From: spitfires-bounces at autox.team.net
[mailto:spitfires-bounces at autox.team.net] On Behalf Of Joe Curry
Sent: Friday, September 21, 2012 1:27 PM
To: 'Roger Elliott'; 'Spitfire list'
Subject: Re: [Spits] Cam Bearings in 1500

The best way to install cam bearings in a 1500 block is to use a cam for an
engine that was originally equipped with cam bearings.  That way you don't
have to bore those journals.  The Mk3 for example had cam bearings which use
the same size block borings as the 1500 but have the cam journals sized
smaller so the bearing will fit between the block and the cam.

Joe

-----Original Message-----
From: spitfires-bounces at autox.team.net
[mailto:spitfires-bounces at autox.team.net] On Behalf Of Roger Elliott
Sent: Friday, September 21, 2012 10:33 AM
To: Spitfire list
Subject: [Spits] Cam Bearings in 1500

Hi,

I am rebuilding the bottom end of my engine - bad rod bearing.

My cam looks like it is in good shape and is only a couple years old. I will
ask shop to verify.  

I am thinking about having cam bearings installed - I have read arguments on
both sides.

As I understand it, the normal process is to install cam bearings then use
an earlier small journal cam.  Is there a bearing set that will allow me to
use the large journal cam I have?   I realize the block would have to be
bored out to accept larger bearings.

Thanks,
Roger Elliott
1980 Spitfire
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