Hi,
I have finished building up the motor to the specs described below. The
results are:
Smooth running
Very usable power curve
No running on
The car was tested today on a rolling road and 82 kW (110 hp) was measured
at the rear wheels at 4800rpm. I'am delighted!
Best regards
Thomas Willig
--------------------------
First of all thanks for the big number of replys to my question. To
clarify my plans:
I plan to use:
DW Fast road aluminum head with hardened studs and DW competition head
gasket.
100S profile camshaft 228/234
10.5:1 DW pistons turned/dished to give 9.5:1 CR
Harmonic damper on crankshaft
Narrow fan belt conversion
Lightened original flywheel
All components precision balanced
Con rods equalized
SU H6 on 100 M Manifold
123 Ignition
Regards
Thomas Willig
Von: David Nock [mailto:healeydoc at sbcglobal.net]
Gesendet: Donnerstag, 13. Januar 2011 17:30
An: Thomas Willig
Cc: healeys at autox.team.net
Betreff: Re: [Healeys] Compression ratio for a fast road 100
Be very careful when raising the compressions on a 100/4. We just
finished re doing a 100 M that had 13:1 flat top pistons in it the
engine would run on and ping so bad on street gas that you could not
drive it. Also due to the high compressions it cracked that crankshaft.
DW only shows a 8.5:1 and 10.5:1. I would say that with the 10.5:1
option you will have to be very selective on fuel and possibly be
limited to race fuel.
When we are building a performance motor for the street we will use the
8.5:1 pistons with a good performance camshaft, New lightened flywheel
and an aluminium head with hardened studs and special head gasket that
does not LEAK. We also will use a verneer cam gear to adjust the cam
timing to the optimum performance.
We have installed lots of light flywheels on both 4 and 6 cylinder cars.
As low as 15 lbs and had no problems with idle, accleration or any other
of the things that have been mentioned on previous e mails.
David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767
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