What part number and gap for the Denso iridium plugs?

 

Ik22 gapped to .25

 

Thanks! Is the heat range comparable to a stock plug?

Anyone know if NGK, Bosch or any other company offers an iridium plug for the 996tt?

And for those running the F5DP0R, isn't this a hotter plug than stock? Isn't the idea to run a colder plug on modified cars?

 

nope, the 5 range ( beru/bosch et al ) is stock. 6 is the colder number.

 

Ordinarily, yes...

But in Boschland, lower numbers are colder, so the F5DP0R is cooler than the FR6LDC.

-V

 

really!?! that seems odd. why then am i running a 6 when my oem was a 5?
is it not a colder plug the 6??

 

I dunno, buddy. But what I do know is that in Boschland, they use lower numbers to mean colder, and higher numbers to mean hotter, just like on a thermometer. Those silly Boschians... being all efficient in their thought processes.

-V

 

Yes that all makes sense. But I've confused myself. So by running a 6 Bosch rather than the stock 5 i'm running a hotter plug? I also thought tuned cars are better off running one step colder not hotter. Therein lies my confusion.

 

Indeed, bro. You're upside- down one step. Change 'em out next time you're in there.

-V

 

http://www.ngksparkplugs.com/tech_su...k_plugs/p2.asp It can be confusing but Bosch seems the easiesr for me to remember higher=hotter.

 

I've been using the oem bosch "6" gt2 plug for years with my tuned car. it works fine! i'm near giving up on figuring this out. but i'll take one more stab lol. the gt2 plug is one step hotter.. or colder from the oem 96t ( a 5 )?

http://www.pelicanparts.com/catalog/..._pg1.htm#item0

i'm beginning to suspect we may have a similar situation given their cross compatibility and my inability to locate the original "5" range plug which was oem fitment when the car was new.

it is ( or is it? lol ) possible the "6" plug? superseded the "5" in the way the 997 trans mount superseded the 996 trans mount. either way, the 6 is what i have been using as others do also.

 

GT2 plug is HOTTER then 'early' TT plug. Great sparkplug, for a mild bolt-on car I wouldn't go anyother way. Long-lasting, reliable, consistent spark/no 'misses', easily acquired=win.
I've removed iridium's before(on Mezger and others) and find the engine smoother on factory copper plug, YMMV...

 

thx i was momentarily ( weekly? ) stuck on stupid. thx for clarifying. but that was my original assertion. i was running ( am ) the one step COLDER plug (6) as my car is decently bolted on, and eats plugs as most 575+rwhp cars are known to do

interesting though, i wasn't able to quickly locate a "5" to compare. is it possible the 6 is ( NOW ) the recommended plug in bosch/beru for ALL 96 turbos, tuned or not?

rob..can you explain to me the info on the chart as it very clearly indicates that the 6 would be HOTTER than the 5 on bosch/beru. this is making me a bit nuts.. or moreso than "usual"

 

From what I can tell through PET and other sources, the 'GT2'/7410 has superseded the old early TT plug across the range.
IIRC, the heat range 5 we are talking about is in reference to the Beru scale, while the 6 heat range for GT2 is on the Bosch scale...anyone have a Beru to Bosch conversion scale?

 

making much more sense. as i suspected. a superseded kinda deal. thanks.
though it is telling to note in my pelican link. they list beru/bosch in the 6 as being interchangeable. as in "same".