It certainly sounds like you have one of my old engines. It was probably
out of a TR-4 though as I did not have the G-3 camshaft until into the
1960's and I stopped racing myself in the end of 1960. The crankshaft
sounds like the type that I had specially nitride hardened and then gound to
minus .010" to give perfect alignment. Look carefully at the connecting rod
bolts. I used a LARGER diameter bolt that was very very hard and with an
increased torque to 60 pounds. If the bolts are larger 7/16" diameter use
the higher torque number. If they are stock use the stock torque. I
specially prepared these connecting rods for these larger bolts and then
re-machined the interior diameter. If you use a lower torque on these
special bolts the rod surface interior will not be round as the rods were
torqued to the higher number when machined, so check this very carefully.
The stock bolt is 3/8" my later engine had bolts that were 7/16". We found
in long testing that larger valves did not increase the power enough to ever
be worth the effort in making the additioin to the size. The inlet ports
being smaller are my recommendation long long ago as this assisted in
speeding up the air flow speed and definatly was better in power and
throttle response as the fuel did not fall out of the air streeam as
readilly.. Lucky to find these good parts and so good luck to you with your
preparation. It appears to be going very well and looking very nice.
----- Original Message -----
From: Carsten Conrads <carco@t-online.de>
To: R. KASTNER <kaskas@earthlink.net>
Sent: Monday, December 20, 1999 9:39 AM
Subject: Triumph TR4
> Hello Mr. Kastner,
>
> I have today the TR3 engine dismanted, which was in my TR4 rally car.
> It seem so that it is really your old TR3 race engine.
> The crankshaft is approx. 1,2 Kilogramm lighter as a seriel item.
> The flywheel have an wight of 9,5 Kg with gear ring.
> the cam followers are 12,5mm shorter as the seriel parts.
> The conrods are lighter and polished, as you wrote in your book. The
> pistons are Hepolite, 87,. mm. also very light, but the piston bolt is
> not lighter.
> The bearings are all 0,10" undersize.
> The crankshaft run very light in the block.
> The camshaft is an genuine KASTNER G3.
> The intake channels are only 41mm wide. Valves are not greater
> I have an S·A·H head they had the intake ports 45mm wide.
> In the appendix I have a photographic from my car from today.
> I hope it is ready in the spring 2000.
>
> Unfortunately I have up today none photographics of the Shell 4000.
> I will buy some magazins of these time.
>
> Thanks again
>
> Carsten
>
>
> Carsten Conrads
> Hohlstr. 16 B
> D-41747 Vieren
> Germany
----------------------------------------------------------------------------
----
|