Stock plug wires on a modified engine
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,188
Likes: 301
Stock plug wires on a modified engine
Guys,
I ran a measurement comparison to my dad's plug wires. He's running GMPP wires and I'm running factory L98 wires.
His are measuing in the ~600 ohm range, whereas mine are in the 6000-7000 ohm range. Anyone see any reason that this could cause a rough idle and/or misfire? Maybe these wires are sufficient for a stock L98, but not on a ~380-400 hp Minirammed ZZ4 with over 10:1 compression?
I just recently burned out an MSD coil as well, so I'm wondering if the resistance on these wires is too great for my application.
I ran a measurement comparison to my dad's plug wires. He's running GMPP wires and I'm running factory L98 wires.
His are measuing in the ~600 ohm range, whereas mine are in the 6000-7000 ohm range. Anyone see any reason that this could cause a rough idle and/or misfire? Maybe these wires are sufficient for a stock L98, but not on a ~380-400 hp Minirammed ZZ4 with over 10:1 compression?
I just recently burned out an MSD coil as well, so I'm wondering if the resistance on these wires is too great for my application.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Unless MSD specified their unit was not for use with stock wires they should be ok.
The resistance of my TPIS performance wires varies from 625-1,100 Ohms, depending on length.
If your stock wires are in tact they should not give the rough idle. If you suspect a bad wire you can check the spark plug condition and/or clip a timing light onto each wire looking for missed flashes.
If all is well with ignition, you may have a faulty/clogged injector.
The resistance of my TPIS performance wires varies from 625-1,100 Ohms, depending on length.
If your stock wires are in tact they should not give the rough idle. If you suspect a bad wire you can check the spark plug condition and/or clip a timing light onto each wire looking for missed flashes.
If all is well with ignition, you may have a faulty/clogged injector.
Burning Brakes
Joined: Aug 2005
Posts: 772
Likes: 6
From: Huntsville AL
Personally I would replace them. I like the Taylor wires. Mine seemed fine but definetly stopped the miss at 1100 rpms when I changed them. 6000 ohms seems way to high to me. Check www.summitracing.com They have them in all colors and specific for your vette. Cost is around $50.00 for the set.
