Iridium Spark Plugs

[hrc2002]

I went from the standard, and recommended NGK (BR6ES) and to an NGK Iridium...pretty neutral about it...I'd say the bike does run a little better with the Iridium, but...to be honest I see or feel any real difference to the bikes running or performance.

[pokenh00d]

I think fitting an Iridium plug to a trials bike is certainly a good idea, as it would probably provide a more intense spark at the very low rpm a trials engine often operates at, but am a little sceptical over a 2hp power increase, unless this was in comparion to a Brisk plug, rather than the std NGK.

The Husaberg is a 650cc single 4-stroke supermoto race bike.

2 rwhp is the difference between 1st and 5th in a race. 2 rwhp is difference between stock NGK and a Brisk Racing plug. Iridium is in the Monty, never in the Berg

My Husaberg

Edited May 15, 2005 by PokenH00D

[nigel dabster]

I swapped to a vx plug on the advice of a Yorkshireman living in Yorkshire, wouldn't run anything else now.

Some more advice from a Yorkshireman not living in Yorkshire, **** off.

Easy tiger.

My point was, that if someone tight thinks it good its probably worth a try, not that all Yorkshiremen are tight of course.

[big chick]

Pokenhood - is the plug gap on the iridium irrelevent then? Would have thought it would have had the same effect whatever the type of plug. I am of course (nearly) mechanically incompetent.

[kevin j]

I did engine research many years back and became very skeptical of most of the claims. The multi prong plug design has been around in hundreds of US patents dating back to turn of century.

re: dyno testing, I would have to see a brand new plug run first, not comparing old plug with new super plug.

That said, I am totally convinced the fine wire plugs are a huge benefit. Finer wire lights off better under semi fouling conditions, low speeds, cold temps, etc. etc. Read: trials and two cycles.

The benefit is the fine wire, not the super material. Standard iron tip would get too hot and burn up if made into the fine sharp point. The fancy/expensive materials allow the fine wire, which gives the advantages, not a direct result of the material itself. There are some heat transfer benefits of the other materials, but thats another topic

So, once I put some car coils and fine wire plugs on my RD350 twin, it totally transformed the personality of the beast. Plugs lasted forever, didn't foul, and it started so easily it was incredible.

Since then I have used the fine wires in every application I could get them for: trials, lawnmore, chainsaw, etc.

Well worth the money IMO.

kcj

[lastplacebrad]

I have tried an iridium plug in a gasser pro and now in my new scorpa sy 250 and IMHO it gives improved starting , and a slightly improved smoothness at the very bottom end which as a lowly clubman this is where the bike spends more of its time ,

As far as extra power in a trials bike is concerned, how much power do you need ??? and is the delivery of the power not more important ??

This is only my opinion , i am not pretending to be "pops"Yoshimura on the bike tuning side nor Dougie Lampkin on the riding side , but i have been riding bikes ,mainly 2 strokes for 20 years and would like to think i could notice something as obvious as smoother running .

As far as tight Yorkshire men go , they outlast "regular" plugs at least 4-1 so who is the tight git now eh !

p.s Both my Impreza turbo's ran these kind of plugs and they last about 75,000 miles in this kind of application .

Cheers, Brad.

Edited May 17, 2005 by lastplacebrad