[ROVERNET - UK] Help!!!! Rover V8 Motor Question

[Kent Kinard]

On Mon, 01 Jan 2007 14:08:17 -0600
  "Kent Kinard" <kkinard at wcc.net> wrote:
> Hi Geff,
> I will have to dig up some numbers on the plugs.  The 
>plug reach differs on the pre-'76 and post-'75 heads and 
>using plugs with the wrong reach can produce hot spots or 
>fouling in the combustion process.  Exact heat range may 
>depend on other tuning details, but I can give you a 
>place to start.

Rover lists three different standard plugs for the SD1 
depending on carburetion.  NGK website lists four plugs 
for the 1980 NAS SD1 with different prices for each 
number-BP6ES being the standard plug.  Champion lists 
RL87YC as the standard plug for NAS SD1's.  Early Rover 
plugs are 1/2 inch (12.5mm) reach and late heads are 3/4 
(19mm) reach.  Hope that helps.

Roverovereachingly,
Kent K.