Yeah, I already have the 3 prong bosch supers in my 1.9L.....I'm sure the
same ones you mention the W7...
I think the threads are longer on the platinum-4 and that the 1.9L can't
handle the added length of threads without the plug itself enroaching into
the chamber.

T

-----Original Message-----
From: Joel Walker [mailto:jwalker17@earthlink.net]
Sent: Thursday, December 27, 2001 3:33 PM
To: Smola, Tony
Subject: Re: spark plug upgrades.....3 electrode for 1.9L and 4
electrode for 2.1L

> That's great, I thought I read on the Fast German Auto site that
those
> platinum +4's only fit the 2.1....
> And that the 1.9L heads didn't have enough headroom......maybe I'm
thinking
> of my 911
> It's going to be nice to put platinums in the Van.

oops!! uh, i'm talking about the NON-platinum 3-prongs, now....  i
haven't used the 4-prongs or the platinums. don't know if they work or
not.

but the heat range is what you want to worry about, as much as the
threaded length ... the buses need a W7 heat range for their plugs.
get one too cool and you'll foul the plugs; too hot and it'll burn a
piston ... in the long term, of course.

i can't see that the 1.9's have LESS headroom than the 2.1 ... i
thought it was basically the same cylinder head.

joel