spark plugs and heads

[Gene Wescott]

Do all banana hole XPAG heads use half inch length spark plugs, did they change

to 3/4 inch with the round hole heads? Which is closer to the original heat range,

NGK B6HS or Champion 306? This weekend is the time to get my car out of storage,

and it needs new plugs, and they choice at the auto parts places is limited.

Gene Wescott

[Chip Old]

On Tue, 17 Apr 2001, Gene Wescott wrote to mg-tabc@yahoogroups.com:

> Do all banana hole XPAG heads use half inch length spark plugs

Yes

> did they change to 3/4 inch with the round hole heads?

Yes

> Which is closer to the original heat range, NGK B6HS or Champion 306?

Don't know. I still have a supply of Champion L87Y, which work well in my TR4 as well as T-Types, so it has been years since I had to buy new plugs. -- Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271 Cub Hill, MD, USA 1962 Triumph TR4 CT3154LO CT3479E fold@bcpl.net

[Skip Kelsey]

Gene: To my knowledge, all banana heads were short reach plugs. The NGK B6HS plug is perfect for this head.I have been selling it for years. Skip Kelsey.............. At 11:53 AM 4/17/01, Gene Wescott wrote:

>Do all banana hole XPAG heads use half inch length spark plugs, did they >change >to 3/4 inch with the round hole heads? Which is closer to the original >heat range, >NGK B6HS or Champion 306? This weekend is the time to get my car out of >storage, >and it needs new plugs, and they choice at the auto parts places is limited. > >Gene Wescott > > > >Your use of Yahoo! Groups is subject to the >http://docs.yahoo.com/info/terms/>Yahoo! Terms of Service.

[Andrew Bradley]

I'd go with a BPR6HS or ES, depending upon the reach. The P stands for projected nose, which helps, and the R is for resistor, which keeps you from broadcasting like an old VW bug as you motor merilly along. Cheers...Andy

[Skip Burns]

Rereading an earlier question regarding the proper spark plugs for T- Series XPAG engine heads, the answer can be found by examining the number embossed on the top, forward right side of the head. Any head stamped with the number 22592 takes a 14 mm plug with a half-inch reach. Later heads had different numbers and, as far as I know, they all take three-quarter-inch reach plugs. If you're not sure, make a small bend in the tip of a wire. Reach down into the plughole and measure it. NEVER, NEVER PUT THE WRONG PLUG INTO THE WRONG HEAD. Having said that, I know of several instances where 3/4-inch reach plugs have been installed in heads bearing the number 22592. The trick is to install two copper washers behind the plug washer on the longer plug. This places the plug head further down into the chamber for improved combustion, yet doesn't interfere with the piston at TDC.