Hi Dave
I am not sure of the CR of the standard PI engine (9.5:1 rings a bell) but
running mine on UK 97 R.O.N. petrol, I often get the feeling it only stops
running because the petrol pump stops! It has a feel similar to my 2000 when
it is going to run on.
Graham.
----- Original Message -----
From: "David Massey" <105671.471@compuserve.com>
To: "Rob Christopher" <robc@cisco.com>
Cc: "Triumph List" <triumphs@autox.team.net>
Sent: Tuesday, January 08, 2002 6:57 PM
Subject: TR6 increasing compression
| Message text written by Rob Christopher
| >While it's at the machine shop, I'll be getting it shaved to increase
| compression from the stock 7.5:1, assuming the head is still stock.
|
| Questions, now, are:
| 1. How do I determine if it has previously been shaved?
| 2. How much do I have removed from the head to bring the compression up
| to around 9:1 or 9.5:1?
| <
|
| Rob, Kas Kastner's competition manual is very specific about this. You
can
| tell the current CR by measuring the height of the head and it will tell
| you how much to take off for 10:1. Since I don't have mine here I can't
| tell you the specifics until I get home and have a look.
|
| I went to 9.5:1 on my (71) with no running problems on 89 octane gas. If
I
| had to do again I might consider 10:1. YMMV
|
| Good luck
|
| Dave
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