tr7triumph.com

Hi Guys

Without wishing to be told the obvious, what's the difference between a NGK BP-5-ES and a NGK BP-6-ES?

What would readers recommend for a slightly warmed 2.0l Slant with a standard air-box [with K&N filter inside]??

Thanks.... and with luck <i>Robyn</i> should be at Gaydon on the 4th May!

Maxwell [:)]

I use NGK BP5ES on a tuned 8v and it works pretty wel.
(car was set up on a rolling road)

<center>
<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC</font id="blue">
<font color="red">http://tr7beans.blogspot.com/</i></font id="red"></center>

Thanks for that, Beans.

Fifty-three views and no other comments, so I guess there's not much difference!

Maxwell [;)]

Hi Maxwell
The difference is the heat range of the plug. NGK plugs are colder as the number increses. The higher the level of tune the colder plug is required. Conversly in a worn engine that is burning oil it is common to use a hotter plug to burn of the carbon and reduce the chance of fowlling a plug.In race engines we sometimes use a warm plug ( low no) to start and warm an engine up and then change to a colder plug.If you can get BP6EY plugs use them. They are basically the same plug but the center electrode has a groove in it. This promotes a slightly better spark.
I would of thought a BP6EY would be about right, this is what is in my 8V and the V8 rally engine.
Cheers Troy

Thanks for the information, Troy.

Maxwell [:)]