E3 plugs

gwmartin55 said:
Has anyone successfully used the E3 spark plugs. 37 21 stud, scat crank.
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Been using them on an 8CM Merc. for a couple of years.
Noticeable difference in starting. Run well but can't document any measurable effects.
The E3-10's I am using have about 1/16" shorter reach than stock H-10's but the tip protrusion in the chamber is virtually identical.


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flatmotor40 said:
What about with Offy heads
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You would have to do a search to see what is available in your 'reach' requirements.
Using your current plug Mfg. and part number you may be able to see by using E-3's cross reference page if an equivalent is available.
 
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I can't recall where I saw the test but the E3 plug was the only electrode design
that showed ANY improvements in horsepower and mileage. May have been Hot Rod or Car Craft or some such deal. The testers "apples to apples" evaluated 5-6 different manufacturers and were surprised because the spark plug category is generally a good one to see lots of snake oil.
 
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