I just had my 15k mile service done at the dealer which included new plugs and a tune up. I asked the service manager about running a colder plug with the supercharger, and he was very much against it. He said it would make the truck run very rough and did not recomend using anything except Toyota plugs. Is there some merit to what he told me or did he just not know what he was talking about? I have read many times that colder plugs are a benifit with the blower, but this service manager (who's opinion I do trust) was very adamant that I do not make the change.

I must mention that the dealer had nothing to gain by putting in Toyota plugs. This was a complimentary service that was included with the purchase of my truck. I didn't pay for the tune up.

 

I installed a 1 step cooler plug on the recommendation of TRD after installing my s/c. I use Denso IK20 Irridium plugs. The set of 6 shipped were $63. The IK16's are the regular number Irridium plugs. The 2 step coolers are the IK22's. The cooler plug helped with the slight ping I was getting during mid-range since all they serve out of the pumps here is 91 octane. Here is a link where I purchased my plugs:

http://www.groupbuycenter.com/buy.aspx?id=7936

Paul

 

I have been running plugs that are two steps cooler for over 100,000 supercharged miles. No evidence of fouling, and it certainly does not run rough.

Exactly what did your dealer tune up??? The are no adjustments to be made to anything on your truck so there is nothing to tune. The maintenance schedule does not call for replacement of the stock plugs until the 30,000 mile service interval.

The 15,000 mile service interval should not be much more then an oil change and some inspections. You may want to look at the maintenance book that came with your owner's manual to see if you recieved the proper service.

Make it run rough....

Gadget

www.GadgetOnline.com

 

They did:

oil change, changed the fluid in the front and rear diffs, plugs, rotate and balance tires, alignment

Like I said, this was all free, so let them do whatever they want.

The reason I ask about the plugs is because these guys do not have very much experience with the superchargers. For some reason there are not very many of them around here. I have not met anyone else in Ct that owns one.

So, should I install one or two steps colder on the plugs? I do have a slight pinging problem. It is rarly a problem since I tend to have a pretty heavy foot. The engine is rarly in the "ping" rev range. By the way, I always fill up with 93 and occosionally with 94 octane.

 

I am with tomus1000. I am planning on getting new plugs sometime this month and am also wondering if 1 step colder would be sufficient.

 

What would be the factors to determine wether to go with one or two steps colder?

How many of you are running colder plugs with a supercharger anyway?

 

T 1000:

Go to the site I posted earlier in this thread. That will tell you what step plug. Or do what I did and call TRD if you wanna hear it from them

 

This may be a dumb question, but what's the difference between hotter and colder spark plugs and what do they each do in comparison to the stock spark plugs?? I'm going to be supercharged soon, and I'm wondering what I should run. Thanks!

Chris

 

The best explination with pictures and everything on this whole spark plug heat range thing and how it works can be found on the NGK website.

Gadget

www.GadgetOnline.com

 

Thanks Gadget!

You're always short and to the point! I appreciate it!

Chris

 

Sorry to say, but your service manager was talkin out his a-s.
A cooler plug under your conditions would be advised. Listen to TRD. An understanding of heat ranges is important. NGK does provide good products and a good understandig.

My service manager would also state the same because they really dont know this end of the bussiness. Your question was well stated. I hope NGK can help you as well.

Good luck, Kxpaul.

 

I checked out NGK's web site last night and read the entire tech section. It seems that either 1-2 steps colder would be best, but I can't figure out what part numbers from NGK will work best. Does anyone know the NGK part numbers for these two plugs and whether I should run 1 or 2 steps colder??

Chris