Another spark plug thread but little different...

[Compaq888]

I read on other car forums that by using a hotter spark plug gives a more complete burn. What do you guys think of this?

Right now I'm running BKR5E-11 which is a copper plug. Before I ran the stock plug which was platinum.

I'm thinking maybe if I switch to BKR4E-11 maybe I will get an even better burn. I don't even know if they got the 4 series plug. EDIT they do have the BKR4E-11 so what do you think???

SO far I have done to my ignition....
1) new distributor cap
2) new distributor rotor
3) new spark plugs which are copper
4) new spark plug wires

Now the only requirement is that my timing has to stay the same. My stock timing is 20 degrees. Now by switching to one sep hotter what are the pros and cons???

[Matt Timion]

A little discussion has been about this lately:

http://www.gassavers.org/forum_topic/halo_sparkplugs.html

And, the immortal words of MetroMPG:

Originally Posted by MetroMPG

i'm avoiding spending time on mods that claim to promote more "complete" combustion based on info on http://fuelsaving.info

i believe this guy knows his stuff - he's a british auto engineer working in the industry with specific experience in engines.

nevertheless, before i read his site, i foolishly went out and bought a set of bosch platinum plugs. replaced an essentially new set of "regular" NGK plugs, and I now seriously doubt there's any difference between the 2 (other than perhaps service life).

[Compaq888]

I don't go for crap that promotes anything. I don't pay attention to websites that are paid by manufacturers or the government.

I only pay attention to real people with real cars.

[Matt Timion]

Originally Posted by Compaq888

I don't go for crap that promotes anything. I don't pay attention to websites that are paid by manufacturers or the government.

I only pay attention to real people with real cars.

I'm unsure if this is some "conspiracy theory" of yours or what... but if you would actually visit the site above you'd find out it isn't a government site. It's made by an automotive engineer, who worked in the industry for decades.

And he's not selling a product.

[Compaq888]

He seems to be very negative. His only solutions are to drive better and get an economical car.

SO does anybody have any pros/cons about using a one step hotter plug?

[JanGeo]

The only reason to go 1 heat range hotter is if they are getting fouled. One heat range is not a big jump. I used to run a hotter plug in front than the back in my v twin MotoMorini motorcycle as the rear plug and cylinder runs a little hotter than the front. Going too hot will cause pre-ignition and knocking at high speed and really damage the engine. So if your plugs are a little brown do it.

[Compaq888]

The spark plugs are just fine now.