On Tue, 8 Jun 2004, Rick & Lori wrote:
> I use Champion RN9YC with my 9.5:1 CR motor. Haven't tried NGK BPR6ES yet,
> but hear they are good also. (Note: RN12YC is a hotter plug which should be
> used with a "normal" CR motor). I don't have the hotter NGK P/N though.
Poking around, it looks like with NGK higher numbers translate to cooler
plugs, so if you are using BPR6ES then going to BPR7ES would get you a
cooler plug. Similarly, going to the BPR5ES gets you a cooler plug.
A lot of the racers use NGK.
Just to add a data point, I use Denso plugs marketed under the Accel
brand. They have a wide variety of temps available. But I use the
non-resistor type just to piss off any computers near my cars. :-)
I use the Accel 116's in the 12:1 motor. But they also work okay in the
9.5:1 motor. The difference is that the 12:1 motor runs 110 leaded fuel
and the 9.5:1 motor runs 93 octane pump gas.
I get no fouling whatsoever on either motor.
> Rick O.
> 72 TR6
rml
------------------------------------------------------------------------------
Bob Lang Room N42-140Q | This space for rent
Consultant MIT unix-vms-help |
Voice:617-253-7438 FAX: 617-258-9535 |
------------------------------------------------------------------------------
|