t1tec

I was given a set of these by a NGK rep. Anyone heard anything negative about these plugs?

Scootin159

They're expensive

Bill

I second the expensive comment.

I use them on my turbo. I like the small irridium electrode. It creates less of a hot spot in the combustion chamber, therefore reducing the chance of pre-ignition. I run 14 psi (low boost setting) to 18 psi (high boost setting) of boost though. I also have to run 1 step cooler than a stock plug, because of my modifications. Rule of thumb is 1 step colder for every additonal 100 hp over stock hp rating.

Can't speak to the extended life claim, I only drive the car about 5,000 miles a year.

Don't think they would change much on an NA.

DerSchlechtSpecht

two words:

Bosch Super

-Christian

EZRider

True they are expensive. Just got a set of four for spring installation. The people "in-the-know" say this is the best stuff you can run. Currently I am running with Bosch 4 prong platinums which as people say was not a smart choice.

Mongo

what's the difference???? I've heard of 951 owners still using Bosch Supers and like those over any other plug, even Beru Silverstones which are more expensive than irridium plugs...try them, but a difference would be near unnoticeable

Andy

Sach951

I've heard nothing but good about anything NGK...

And supposedly TonyG actually saw considerable, relatively speaking, gains on a dyno from switching plugs to a set of NGK-Rs...

Best Wishes,
Sach

badass951

Couldn't have put it any better myself.

Yabo

Are these NGK-R's? just curious. or do i need a specific model number of the ngk - rs. thanks
ebay

eclou

Anytime fresh plugs are installed you will see up to 5 hp.

Bhj0887

No, you won't, not if your going from bosch platinum +4's to Platinum +1's. I hate those plugs with a passion. I will never use them again, I put my old ones back in, it makes a very noticeable difference in throttle response. If your going to use Bosch plugs get the platinum 4's they will make a difference, I'm leaning towards the NGK-R's but I can'[t find a place to buy them.

macnewma

Check out http://www.sparkplugs.com . They have a good selection and a good tech page.

From what I gather, Platinum plugs only benefit from longer service life. You should not run these in high compression or turbo engines. Platinum is not as conductive as copper, iridium or silver.

I also understand that the multi-electrode style (like the bosch +4 or splitfires) is complete snake oil. The spark will only travel the shortest path. If you could ensure that all paths were equidistant, it might do something, but that is impossible.

According to most of my professional and amateur racing friends, copper is the way to go. The only issue being the service interval. Some do like iridium, but not many. They say that they can't tell the difference so they just stick with copper. The iridium might be the best combination though for a street car.

Good luck and check out the "411" link on sparkplugs.com.

Max

Sach951

Platinum has a longer service period. However, platinum is not necessarily any better than copper or silver performance-wise, if not worse. Given that you should be swapping your plugs fairly regularly to maintain performance platinum doesn't seem advantageous to me... I would also echo the above snake-oil comment with regard to multi-electrode plugs.

Take a look at the NGK website. Some excellent literature there. I would go with the regular NGK-R copper or Iridium plugs.

Best Wishes,
Sach

Scootin159

IMHO if I had some daily driver that was a pain to change the plugs in (there are some cars you have to drop the motor to change the plugs!) I'd go with platinum +4's, solely for the longevity factor. The platinum lasts longer, and having 4 grounds makes it last longer still (once one ground gets dirty, it goes to the next). Sure they'll perform worse, but I won't have to mess with them often.

The Porsche however gets copper plugs