-
Hi Guest!
You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
There are some perks with a member upgrade!**Upgrade Now**
(PS: Subscribers don't see this gawd-aweful banner
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Supercharger Spark Plugs
- Thread starter 68Sprite
- Start date
Share this page
Trevor Jessie
Yoda
Offline
Email Robert and ask him what to use: rgoldman@mossmotors.com
racingenglishcars
Darth Vader
Offline
The originals were 14mm threads. The only possible difference is in the length of the threads. Basically short or long. Original was long. I wouldn't expect any different with the aluminium head.
racingenglishcars
Darth Vader
Offline
Therefore I would go with the ones supplied by Moss.
""""" Anybody know what plug we should be using? """"""
======================
Originally Posted By: racingenglishcars
The originals were 14mm threads. The only possible difference is in the length of the threads. Basically short or long. Original was long. I wouldn't expect any different with the aluminium head.
-------------------------------
First you have to state what SIZE.....
14mm and what reach? 3/8" or 3/4" reach. Can you use a 13/16 hex...as there many more availiable heat ranges in the bigger hex. Being an aluminum head we might assume a gasketed plug and not a tapered seat?
Then the second part is
...what is the static compression ratio of the motor, what is max boost ,and do you have room for an extended tip plug.
Supplying this info then a starting point plug can be selected.
Only on the dyno and looking at EGT's will get you really to home plate. If you have any substantial boost you want to have a boost spark retard and a decent fuel curve.
Hopefully, plan B wont be just something that screws into the hole.
<)).
======================
Originally Posted By: racingenglishcars
The originals were 14mm threads. The only possible difference is in the length of the threads. Basically short or long. Original was long. I wouldn't expect any different with the aluminium head.
-------------------------------
First you have to state what SIZE.....
14mm and what reach? 3/8" or 3/4" reach. Can you use a 13/16 hex...as there many more availiable heat ranges in the bigger hex. Being an aluminum head we might assume a gasketed plug and not a tapered seat?
Then the second part is
...what is the static compression ratio of the motor, what is max boost ,and do you have room for an extended tip plug.
Supplying this info then a starting point plug can be selected.
Only on the dyno and looking at EGT's will get you really to home plate. If you have any substantial boost you want to have a boost spark retard and a decent fuel curve.
Hopefully, plan B wont be just something that screws into the hole.
<)).
Trevor Jessie
Yoda
Offline
Robert owns the midget that they use in the adverts. He has had the engine in multiple configurations. He can give you a good recommendation.