Should the new plugs be a step colder than stock? I have a 23 PSI tune from Trifecta on the car now with 20k miles. What are good plugs to replace stockers with?

 

I've been running a Trifecta tune since my car had about 3k on the clock. I'm now at 27k, the stock plugs have given me no trouble. If you haven't been experiencing any problems, I'd personally stick with a stock plug type and ensure they are gapped at .35 if I remember correctly.

 

Is that stock gap as well?

 

Yes, I believe stock gap is .035

 

If u have no mods.. stockers r best apparently.. if u have mods and start experiencing troubles with stockers, like I did, I'd recommend NGK laser iridium 3787's (ILTR6A-8G if that's the correct #). Stock gap is .035 if it has issues at that gap, reduce it to .030 If you still have issues.. get a colder plug like the laser iridiums
my two cents

 

I have 3787 with trifecta and everything is gravy.

 

Vince recommends the stock plugs.

 

I run stock plugs with no issues.

 

I've got my stock plugs gapped to .37


It runs really good like that for some reason up here at 5400 ft on E

Changed my stocks at 34k running stocks once again they seam great to me..

 

I've been thinking of going back to stock heat range. I really have no noticeable performance differences in them but the colder plugs do cause a slight popping at idle through the exhaust and I can hear the in spent fuel POP in between some shifts.

 

What kinda plugs are the stockers? Looking to replace mine this weekend, at 37k miles, had the car since 25k.. Don't know if they've ever been changed lol

 

stock plugs for me, tuned for over 20k mi... I replace mine every 15k mi or so.

 

Stock plugs are NGK #ILTR5D 5476, gapped at .035

 

Stock Plugs for stock turbo. We've also stopped re-gapping them and just run them right out the box. Car seems to run best like that IMHO.

 

What are they gapped at out of the box?

 

.035

 

Should still check them though... Someone could have dropped one lol. I'm sure BYT meant that, just sayin for the people that might not know that.

 

I was wondering bout this but never got a straight answer..
So for stock turbo, it's best to keep it stock plugs& gap huh?

 

Yes

 

At the hillclimb this past weekend, I was getting a misfire with the stock plugs on the second half of the 2.2 mile course, 29K miles. Only thing I could get locally was Autolite iridiums, since I had limited runs, I gapped them to .030 to be on the safe side. Misfire went away, but I honestly felt a decrease in power, especially in the lower rpm range. Could be my imagination though. Course was very steep, and only developed the misfire on the second half of it (basically full throttle the entire time, 122.1 Duryea Hillclimb).

 

I would use a feeler gauge instead of the ring to check the gap. Don't force it into the gap either, eye it up. The fine tip Iridium plugs are VERY easy to destroy and at $7-$8 a piece.. I wouldn't chance it.

 

I switched to E3 plugs and my issues with backfiring and missing at high RPMs were all but cured. Still think the tune is a bit off. Nothing a trip to BYT can't fix

 

stock 41-108's(.035) or ngk 3787 (.032) Im running 3787 with no issues

 

I would not run E3's in this car! Stick with the stock plugs only, there really is no need to change them and you are doing more harm then good IMO.

 

How often should you replace them with stocks? Every 30k miles or something?