Does anybody know if any manufacturer has developed any performance replacement spark plugs yet for the H3? I check a couple of months ago and nobody had anything. I'm just curious. I'm going to do some searching and see if anybody like Bosch or NGK has any yet. It's only a matter of time I figure.

I actually just found that Bosch has some Iridium plugs, finally:

http://www.boschautoparts.com/RB.NA.AFTERMARKET.BOSCHAUTOPARTS.CMS/templates/VehiclePartFinder/VehiclePartFinderResultsTemplate.aspx?NRMODE=Publi shed&NRNODEGUID=%7bB045EDBE-2735-4740-B308-1FE402C47E2A%7d&NRORIGINALURL=%2fVehiclePartFinder %2fVehiclePartFinderResults%2ehtm%3fYear%3d2006%26 Make%3dHUMMER%26Model%3dH3_%26Engine%3dL5%25203%2e 5%2520%28211%29%2520GAS&NRCACHEHINT=NoModifyGuest& Engine=L5%203.5%20(211)%20GAS&Model=H3_&Year=2006& Make=HUMMER

It looks like Autolite has some Iridium ones also:

http://www.autolite.com/partsCatalog...K&model=H3_SUV

I'll check it out.

Does anybody know what kind the H3 has stock? After the PCM upgrade is done and I drive a couple of weeks with it and get a feel for the performance boost, this is the next thing I'm going to upgrade.

 

What's the OEM plug number?

 

Ngk makes some, and pulstar. Ngks are about 15 bucks a pop at advanced, and pulstars are about 25 each from the pulsar site

 

Ya know, I couldn't remember what these were called and have been thinking about it for a week or so. You just reminded me. Thank you VERY much

I wonder if they are really worth it though. I am tempted to buy them just to be the Guinnea Pig that tries them out.

 

I have found Bosch to be a good bang for the buck. The new IRs are $10.00 ea at advance auto. At 7000 miles, I got a long way to go before a plug change, but I do have to do the oil this week..................I think I'll attack the front skid plate with my grizzly buffer and tripoli, if I have time[:@]. I'm ordering the PCMfor less this week absotootly fer sher!!!!

 

There is not going to be any magic spark plug that gives you better mileage and/or more power correct? I'm assuming the only difference between plugs are the materials and how long they last.

 

I would say [sm=icon_ladiesman.gif]Using dynos at the GM Tech Center...............hope the general is not looking/listening......... when they first came out with those split fire and "u" grove plugs a ways back............if they made any power,the lab ratscould not find it! Might give you a little smoother idle, (maybe) although my personal belief is idle and spark quality is more related to a good and properly functioning set of wires, not the plug itself. Better quality plugs should perform their job better longer, if you see a change in MPG, it would be coincidental, or just because you waited too long before changing the plugs.

 

considering what a great job the magnets did for you, i think you should buy 10, just in case the first 5 you put in don't do what you want. you should always have backup . . . . . . . .

 

You just had to bring up the magnets to Doc didn't you

Now If I ever join him at the Dunes, he'll probably tow my H3 into Lake Michigan just to teach me a lesson.

 

I read up on your magnets. I hear they are introducing a new fangled Magnetic Spark Plug! We should definitely do the Dunes, with or without magnets?




This one almost got us?