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Re: TR4 Compression ratio

To: PiJay@t-online.de, triumphs@autox.team.net
Subject: Re: TR4 Compression ratio
From: Nickbk@aol.com
Date: Tue, 3 Sep 1996 02:32:28 -0400
In a message dated 96-09-02 11:18:29 EDT, you write:

>
>Dear Nick,
>
>some questions to you:
>
>--where do you have your knowledge from?
>          I am used to Kas Kastners Comp Prep Man
>Is there any different book?
>
>--have you ever heard or thought about, replacing the chamfer (after
>grinding) in 
>an unsymetrical manner for instance only on the side of the inlet in order
to
>
>create additonally turbulence in the chamber?
>
>--what is meant with "eyebrow cut"? is that different from a 45°angled 
>ramp/chamfer?
>
>
Peter-

You ask where my "knowlege" is from ! Unforunately, most of it is from the
school of hard knocks. Over many years, I have given many men with
dynomometers, waaaay too much of my hard earned buckeroos. You ask, "is there
a different book". Yes, there is, my checkbook, it must contain the secrets
of the world, as everyone seemed to be interested in it. If you care to buy a
copy of it, I will charge you for whatever "pearls" of wisdom you may find in
it. If you do not care to purchase a copy, then please disregard my OPINIONS.
<g>

Yeah, I tried a sort of "S" shaped curve on the side opposite the spark plug
once, so that the "squished" mixture would be directed toward the intake
valve, like a CVCC or Mays head. I always thought that this should work, but
I ignored the "prime directive", CHANGE ONLY ONE THING AT A TIME.
Built that motor with that combustion chamber modification, "oval" ports and
4 SU carbs. (For those of you who think the 4 SU's can't be done on a TR4
motor, delete the float chambers, mill off the throttle shaft extensions,and
build 4 straight tubular intake manifolds. Build and mount a "float chamber
assembly" on the firewall at the right height. Since the motor is lower at
the back than the front, you must build a minimum of a two chamber float
assembly, one chamber for the front, and one for the rear, 4 chambers would
be better, but, it seems to be close enough with only two.) That motor was
exceeding 12 to 1 compression, but didn't make as much power as other
configurations. I still think that the oval ports were the problem, and would
like to experiment further. Unfortunately. these days my experimentation
consists of painting the lug nuts the same as the wheel, or something
completely different.

"Eyebrow Cuts"-
By these, I mean the small reliefs cut into the sleeves. If you have the comp
prep manual, I'm sure it covers this.

The Car Curmudgeon
        Nick in Nor Cal







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