What is the difference? NGK BKR6EIX vs. BKR6EIX-11 for Elan

[kmckmc]

Hi,

In other posts, I see NGK BKR6EIX plugs were mentioned and used by other forum members.

How about BKR6EIX-11 (this particular plug was mentioned in USA NGK's website, indicating they are for 1991 Elan Turbo.)

What is the difference? NGK BKR6EIX vs. BKR6EIX-11 for Elan


Should BKR6EIX-11 be used for our Elan M100 Turbo?

Regards,

[Doug]

any BKR6E should work in the Elan -- not sure what the "11" is, but it may be the gapping of it. Regardless you should still check and set the gap of any plug you use--don't trust the factory setting.

[kmckmc]

I found out that 11 stands for GAP distance of 11mm.

The BKR6E's GAP distance is of 9mm.

Does that make a difference?

Regards,

[ailwyn]

I could be talking through my a*** but I think it's claimed that a bigger spark gap leads to more efficient fuel burn?

Ailwyn

[ratman]

I found out that 11 stands for GAP distance of 11mm.

The BKR6E's GAP distance is of 9mm.

Does that make a difference?

Regards,

what do you think about 1.1mm and 0.9 mm????

[Gazza]

Might be wrong but I think the Download Manuals suggest using the BKR6E or alternative BKR7E-11

Gary

[Doug]

the gap should be specified on the decal in the engine surround area!

I would use the specified gap -- you can regap the 11 smaller if needed -- with a turbo engine I'd go with the specified gap unless you are one smart mutherfu**er and know otherwise.

I'm sure it's not 11mm , but the placard will tell you . . .

[Elanlover]

The Elan M100 Service manual v6, page 2, section TDG (downloadable from this site) suggests the following:

Plugs:

N/A - NGK BKR6E-11 or ND K2OPR-U11

Turbo - (recommended) - NGK BKR6E or ND K20PR
........ - (alternative) - NGK BKR7E-11 or ND K22PR-U11

Gap - suffix "11" or "U11" = 1.1mm (0.043 in)
....... - others = 0.8mm (0.031 in)

So, if you have a turbo, it seems that either gap (1.1mm or 0.8mm - not 11mm) will suffice. I wonder what the performance difference would be..............

[Doug]

where's Alan when we need him? Isn't it "bigger gap harder to jump under boost" kind of thing?

I had Torquemaster plugs in mine, which don't need to be gapped; so I never worried about it!

[ESM]

Better late than never!

Bigger gaps are better because they have a bigger spark area, which is desirable for good combustion. However, as Doug says in high cylinder pressures its harder to get spark to jump. So you may get a high load misfire with the bigger gap, especially if you have increased the boost.