I have a stumble at 20 psi.

It has gotten worse over the past few days. I feel it's probably the fact that I'm trying to run 20 lbs of boost on the fourteen year old ignition coils, but hey, I like to get my money out of stock parts.

I called up Luke and told him we may need to dial back the boost until I decide what to do. He said that I should try changing the plugs out first.

I'm running iridiums that LSE put in when they originally tuned the car, and it was running pig rich, so I figured, 'ok what the hell.'

I also remember Verfer and I had one hell of a time trying to find a freak'n parts store that would even order the standard NGK copper plugs that would fit a "3000GT VR-4" because apparently dodge stealths can't even accept a copper plug, but 3000's can...

So while I had Luke on the phone I mentioned that to him, and he replied, "Oh, no worries, I've got some here on the shelf, I'll set them out for you."

I swung by to grab them, not even thinking about it, and headed home to install them.

They are the DSM plugs. the BPR8ES (or whatever) are the ones that are too fat for the 3/S heads.

It's the second time in my life that I have done this. I really feel I should have caught it this time. I'm going to blame the first time on Greg, because I dragged him along, and he was like, "oh, they'll fit fine." Then when they didn't fit he was like, "hey, do you mind if I yoink those for my DSM?"

Anyways. I just did something dumb and felt the need to share. So tomorrow it's back to Beyond Redline to see if Luke has any 3/S copper plugs in, otherwise I'll be running around town trying to find the iridium equivalent, and ordering 24 regular coppers so that I don't have this problem for the next six months.

sigh.

_________________
Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!

If you can't find anything, I have 10(yes TEN) NGK BCP7ES stock number 5030. If you would need these, let me know.

_________________
1994 Stealth R/T TT Pearl Yellow
-Out since June 05'
-Almost ready for start up

1991 Stealth R/T Red
-Out for 7 weeks with a spun bearing
-Came back to life on 8/04/07
-Blew the motor again on 11/25/07

how much per plug? BCP7ES

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From Brixton Prison, Jebb Avenue London S.W. 2 Inglan

Adam,

There is some good spark plug info here:
http://forums.mn3s.org/viewtopic.php?f=6&t=1397

There are several NGK plugs that would work for you. Any parts store should be able to get you the plugs if you can throw them the part number. I've seen 3S guys even use the V power versions of the NGK coppers.

later,
Curt

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Minnesota 3/S message board: http://forums.mn3s.org/
Minnesota 3/S Facebook group: https://www.facebook.com/groups/Minnesota.3S/

Hey thanks Curt!

The problem comes in, I guess, with the fact that both LSE (when they were open) and Beyond Redline have said that a platinum plug is no good for a car past stock, as the platinum tipped plugs retain heat, and become little glowing embers and cause pre-ignition.

The choices for the modified turbo cars go down to iridium or copper.

I've rocked everything from autolites to champions in my car because the NGK coppers for our cars are hard to find, but NGKs just seem to perform better, although the champions let me run upwards of 17 psi, the NGKs seemed to have a better spark through a few extra psi.

Crayon box, if you want to bring the coppers to the gathering I will surely take all of them off your hands. I will also bring tools, as per usual...

I've got a set of iridiums coming from beyond redline, but I'm not certain if you can gap those down, which would be helpful when running on ignition coils that are giving up. I'll change them out tonight, but obviously if it still has a stumble, I will be a less then happy camper.

Anywho. Yeah, Brandon, if you could bring the plugs, that'd be super!

_________________
Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!

Yes, you can gap the iridiums. Although many people do not recommend it due to the electrode being very fine and fragile, I, as well as many others have done it without problems.

Just make sure you work very slow, and do not use the center electrode as the fulcrum. It doesn't take much force for it to break off on you. If you need to increase the gap, pull on the ground electrode as opposed to prying up on it against the center electrode. Yes, some people pry against the center electrode but 3/S owners always use common sense, right?

Yeah, I always just whack the spark plug on the concrete floor until it closes the gap up... Prolly can't do that with the iridiums...

_________________
Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!

I prefer to use my teeth to close the gap on iridiums. Hopefully my tooth will give out before breaking the electrode. God forbid wasting a $10 spark plug due to negligence!