The V8 Owners Forum -

I saw these and was wondering if they're a good idea? I would have thought the spark would just jump the one gap with the lowest resistance of the four and it doesn't look like the gap(s) are adjustable either but Bosch are a reputable company so what do you reckon?

All a marketing ploy

ratwing wrote:I saw these and was wondering if they're a good idea? I would have thought the spark would just jump the one gap with the lowest resistance of the four and it doesn't look like the gap(s) are adjustable either but Bosch are a reputable company so what do you reckon?

And they do that, so potentially might have a slightly longer service life.


Stick with NGK, job done.

stevieturbo wrote:

ratwing wrote:I saw these and was wondering if they're a good idea? I would have thought the spark would just jump the one gap with the lowest resistance of the four and it doesn't look like the gap(s) are adjustable either but Bosch are a reputable company so what do you reckon?

And they do that, so potentially might have a slightly longer service life.


Stick with NGK, job done.

NGK

Way back in my yoof I worked for a bloke who was a marine mechanic and a lot of the outboard motors had a full ring outer electrode with the central one, called surface gap or ring gap if I recall.
The same technology is used on F1 and MotoGP engines these days.

As an aside, aircraft spark plugs are multi electrode units, so they can't be that bad, and they merely get sandblasted and regapped at sevice intervals until they start to breakdown on testing.

Aircraft engines have generally low specific outputs in the quest for reliability. Using four electrode plugs may make them more reliable - but with no benefit to performance - or even a slight disadvantage.

I did have a set in my RV8 and can't really say if they had any advantages or disadvantages. Had to change to a resistor type when I went EDIS, so got normal types.

Thanks for the replies, sounds like they're probably no better or worse than conventional plugs so if i can still get them cheap I think I'll buy a set and try them.

Wouldnt care if they were cheap....NGK's are cheap too.

I'll stick with NGK ( or Denso )

stevieturbo wrote:Wouldnt care if they were cheap....NGK's are cheap too.

I'll stick with NGK ( or Denso )

This guy speaks sense, you really dont want to know how many NGK plugs I have fitted over a 30 year motor trade career if I cant get em I will gladly fit Denso quality plugs FACT

NGK is all I use as well.

Has anybody tried the MSD plugs ?
Seem really expensive !

Blown v8 wrote:Has anybody tried the MSD plugs ?
Seem really expensive !

No. I use NGK, they work, they're cheap ( unless you buy dear ones of course lol )

When something works, and works well...dont break it.