so whats the gap to be set on the dr12s

 

Which is better to use the DR12S (Silver Racing) or the 14LGS (Lambo 4 prong)? If going with the LGS style should 12LGS be used instead of 14LGS for a JCW engine? Which style of plug performs better (silver or lambo)? Which last longer and how long? I am not concerned about the price.

 

See posts #1 and #4.
I went with .028, Ryan went went with .030. Anywhere in that range should be fine.

Jim

 

The DR12S are better for SC cars.

Longboard

 

When I got my RMW tune, Jan recommended the 4-prong for cars with stock heads, and the other plug for cars with his head, or a JCW head. All cars were SCd.

 

Looks like I disagree .

Longboard

 

the 12s are better for high boost apps and cars with heads

 

Donkey

 

Thanks for the inputs. I will go with DS12S plugs for my GP.

 

Then how about a "pullied" car with a stock head?
I went with the "12's" but if you're saying the "4-prongers"
work better, I'll try those.

Jim

 

now i am confused. I spoke to alta and brisk and they recomend the dr12s plugs for stock head with a 15% pulley .

 

Contact Alta or Jan@RMW and buy their plugs. Both sell Brisk, but they recommend different styles, and the heat range recommendation for a plug can vary depending on style (with any brand of plug).

Since I got the tune (and the horsepower) from Jan, I went with his recommendation. Result when I popped the 4-prong version in: virtually eliminated the ping at "tip-in" that I had experienced with commonly recomended NGK Iridium IX. Yes, I was surprised that changing plugs would make a difference when the ones coming-out only had 10,000 miles on them and looked great. And yes, I am happy with them.

 

Sorry to say but the NGK's are way over rated. Do a search and you find all kinds of people who have had problems with them.

Not only do the Brisk plugs help pinging and misses but people have seen increases in HP and TQ. Again google and read.

Longboard

 

Can someone clarify - for the 4-prongers... are you running 12 or 14 heat range plugs?

 

14

 

Thanks Jan!

 

Are you still waiting to get some in stock???

 

what would be best for a cooper with a ported head ?

 

I have the 4 prong in stock

 

I am about to order a set of these. Anyone knows a diffrent place then alta or autoxcooper that I could ****** these from ?

 

Call Danny or Jan

 

Quote:
Originally Posted by Revolution Mini Works
the 12s are better for high boost apps and cars with heads

Then how about a "pullied" car with a stock head?
I went with the "12's" but if you're saying the "4-prongers"
work better, I'll try those.

Jim
__________________

 

In the UK the tuners allways advise us to go one step cooler i f you have a 15% pulley and other mods. so why are you guys now using a four prong plugs that alta recomend for a std car. do we now throw are denso and ngk in the bin.

 

Thanks Wes. I will go by Danny sometime.

 

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