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Thoughts about this process? Horse found this on a Volvo/Turbo brick forum. Interesting to say the least... side gapped spark plugs
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone 
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Joined: Sep 2000
Posts: 9,602
Hard-core CEG'er
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Hard-core CEG'er
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That is the only way you should cut plugs for use with nitrous or high boost. That trick is about as old as spark plugs are. It's actually a good idea for any engine.
Matter of fact some new plugs already come cut like that. NipponDensos are one. They do it one step better by making the electrode come to an edged point.
However not gapping like that is not going to be the cause of spark blow out at very low boost. Yes do this to your plugs. No it's not the problem.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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Joined: Aug 2002
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Hard-core CEG'er
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I know the plugs aren't causing my misfire, it's likely the plug wires or the coil itself (it only happens when it gets hot).
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone
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Joined: Aug 2001
Posts: 5,810
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
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[censored] plug wires could be causing it, but more likely it is a combination between your plug wires and your tune.
Only when warm is when the mixture will be at its leanest.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
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Joined: Aug 2002
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It's not the tune, I've got some decent datalogging in and dyno time to know it's not. The AFR is fine, even after it warms up. I simply get a random misfire after 10+ minutes of street driving. Chris is who pointed out that it's most likely my coil, so good ol' Bill J will have one on my door step tomorrow.
My SVT has just shy of 75K on the car, and I reused some of the items with my basicly new drivetrain. I've gone this far, what's a new stock coil and great Magnacor plug wires?
::dumps more money into the SVT fire to keep it going::
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone
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Joined: Aug 2001
Posts: 5,810
Hard-core CEG'er
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Hard-core CEG'er
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Originally posted by Swazo:
It's not the tune, I've got some decent datalogging in and dyno time to know it's not. The AFR is fine, even after it warms up. I simply get a random misfire after 10+ minutes of street driving. Chris is who pointed out that it's most likely my coil, so good ol' Bill J will have one on my door step tomorrow.
My SVT has just shy of 75K on the car, and I reused some of the items with my basicly new drivetrain. I've gone this far, what's a new stock coil and great Magnacor plug wires?
::dumps more money into the SVT fire to keep it going::
But its almost NEVER the coil!!!!!! I can't remember when the last time somone installed a coil by itself that it fixed the problem.
I hope it is in your case, but my plug wires did exactly what you are talking about only more so on my 3L swap (you know, runs great cold for first five minutes then starts to stutter or misfire getting quickly worse, drive easy on the throttle and at certain rpms to minimize the misfiring, misfires begin to clear up as you go full throttle at higher rpms, etc when I first put it in. Air fuel had changed and I was using an eManage to help improve the problem, but it was fuggin plug wires @$^T!Q@%!#$@^#$^&$&*%&$%$#@! 
I'd have never bought the emanage in the first place if it weren't for the wires going bad and me being STUPID. I even swapped in a different coil, the one from the 3L.
Later on I got tired of thinking that wires could be bad at 40K miles and Voila, problem gone....Several hundred dollars in mods later!! It was a combination of running leaner A/F from swap, though still right where it should be according to the wideband at the dyno, and the plug wires.
Get the Magnecores that DemonSVT recommends if the problem recurrs.
Remember, since every coil is different, it may alter the problem but unless the coil is really failing, it will come back.
You forget, when I was building the timing control device for the eMAange back in 2002. I went into great depth on how the PCM controls the coil packs in this car. Most people are part-changers, I ran every part of that circuit on an oscilloscope so I even know what he spark vs. time graphs look like, what the voltage spikes on the primary look like, etc. I know the part numbers on the chips in the PCM, the wiring schematic by heart, how the coils work, and how the wires and plugs work.
If you test the resistance on your coil across the primaries and across the secondaries you will know whether to replace it or not.
There are some cars where anytime you have an ignition problem, you go and change the coils. The old late 80's Potiac Grand Am is a primary example.
THere are some where you go and change the ignition module, GM V6's in the early 90s are another.
Fords wastespark duratecs eat up plug wires. Yes other problems occur, but by far, probably 99% of the time it is just plug wires.
Last edited by warmonger; 12/29/05 01:38 PM.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
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Joined: Nov 2000
Posts: 2,454
Learned patience the hard way
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Learned patience the hard way
Joined: Nov 2000
Posts: 2,454 |
If anyone happens to be looking for magnecore's I got a great price on them at SPMotorsports. They've got them for just under $100 where everyone else is around $125.
Rick
Owner of 00 #1611 Silver (Totalled) 98.5 T-Red SVT #6180
Buckshot77@msn.com
Misc 3L parts for sale
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Hard-core CEG'er
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Tom,
Like I've said, I have my LM1 to know that I am not running lean at all. I have 3 tunes that I am using. I have 4 hours of dyno time to boot, and know it's not my tune.
1) The one that I used on my dyno run that you thought was a little rich.
2) The same tune, but with 15%-10% less fuel (LM1 still shows good AFR, Raptor shows the PCM is still pulling up to 5% fuel in spots, but otherwise all bouncing around 1)
3) The same tune as 2, but with less timing.
I had a few misfires on my 2.5L and thought it was probably the crappy Ford racing wires. The Bosch wires were on just before I spun a bearing, so I can't say for sure if the misfire stopped.
With 75K on the coil, I'm willing to drop $80 to have a new one under the circumstances.
I should be getting the coil from Bill Jenkins today, along with the Magnacor wires and NGK copper TR6's that I'm going to 'un-shroud'/sidegap.
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone
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Joined: May 2000
Posts: 21,197
I have no life
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I have no life
Joined: May 2000
Posts: 21,197 |
Originally posted by Buckshot77:
If anyone happens to be looking for magnecore's I got a great price on them at SPMotorsports. They've got them for just under $100 where everyone else is around $125.
Rick
That's good to know! 
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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Joined: Nov 2000
Posts: 2,454
Learned patience the hard way
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Learned patience the hard way
Joined: Nov 2000
Posts: 2,454 |
Yup, it made my day for sure. I searched a good number of sites and he was cheapest by far plus I got them in a few days after the order. I can't imagine with other places selling them for $125 that dealer cost is much below $70 or so, so good for Joe by selling them at that cost.
Rick
Owner of 00 #1611 Silver (Totalled) 98.5 T-Red SVT #6180
Buckshot77@msn.com
Misc 3L parts for sale
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