Well he got the truck back today. But they only changed the springs on one cyl head. He didn't notice it until he got home and read the RO. He called the dealer but the service manger was gone for the day. He's calling first thing in the morning. lol I even told him to watch for that being they are gonna cover it.
2015 GMC Sierra RCSB Z71 5.3
How could two plugs per cylinder possibly do any better than one? I mean once its ignited it ignited...Originally Posted by txarkitekt
Tired ol' 5.7, 5.3 swap in progressHandle every stressful situation like a dog.If you can't eat it or hump it.Piss on it and walk away.
I think one plug fires on the intake stroke, and the other fires on the exhaust stroke. At least that's what I remember being told, when I had my rustang...
That doesn't make much sense...why would on fire on the exhaust stroke? What would be gained?
07 Z71 4x4, 6.0L, 3.73s, Turbonetics T76 @ 10 psi, 75 shot, Snow meth kit, PLX DM-100 wideband gauge, Nelson tune, Comp 212/216 .557/.561 114 lsa, 60# injectors, Yank 3000, 4L80E , Magnaflow - dumped, e-cutout
Line-X, Pace Edwards Full Metal Jackrabbit bedcover
Unburned fuel I would imagine, which I assume lowers emissions.
Last edited by Weirdguy; 09-11-2008 at 09:53 PM.
Both plugs fire at once. Any engine that is built so there is no room for the plug in the center of the combustion chamber would benefit from two plugs. With the Hemi's plugs location, only one plug would be prone to detonation because the flame would have to travel so far to burn all the fuel. Twin plugs guarantee more complete combustion.
2000 Sierra 2500 HD. 408 (11-2007) Whipplecharged, Big (18x24x4) FMIC.
F*** 4-cylinder engines have had 8 plugs for way more than a decade.
I figured it had something to do with a more complete combustion but it seems that there area easier ways to do that than an extra plug in each cylinder. Isn't that the main idea behind ignition boxes like MSDs?
07 Z71 4x4, 6.0L, 3.73s, Turbonetics T76 @ 10 psi, 75 shot, Snow meth kit, PLX DM-100 wideband gauge, Nelson tune, Comp 212/216 .557/.561 114 lsa, 60# injectors, Yank 3000, 4L80E , Magnaflow - dumped, e-cutout
Line-X, Pace Edwards Full Metal Jackrabbit bedcover
03-05 hemis fired one on intake and the other on exhaust. back then we where getting custom made short wires and looping back to the adjacent plug to fire both at the same time. but in 06 the germans decided it didnt make a big enough diff to offset the cost of 8 long ass wires and redesigned it to fire both straight out of the coil pack. eliminated secondary wires altogether. purley for warranty costs.......
2005 crew cab, new crate lq9 with comp 212/218, 558/563 on 115 cam, 80mm t.b. coated long tubes, off road y, flowmaster cat back, dynomax bullet, ngk plugs, msd wires, k&n cold air kit, 4.10 gears, auburn pro lsd, transgo shift kit, nelson drive tune, trailblazer i-6 torque convertor, anzo lamps, ss front bumper, z71 tahoe rear bumper, debadged, kenwood touchscreen with headrest monitors, JL components, coaxials, sub, 5ch amp. bell tech 2/4 drop. 22x10 ss wheels with 285/35/22 bfgs.
new word.....purley
2005 crew cab, new crate lq9 with comp 212/218, 558/563 on 115 cam, 80mm t.b. coated long tubes, off road y, flowmaster cat back, dynomax bullet, ngk plugs, msd wires, k&n cold air kit, 4.10 gears, auburn pro lsd, transgo shift kit, nelson drive tune, trailblazer i-6 torque convertor, anzo lamps, ss front bumper, z71 tahoe rear bumper, debadged, kenwood touchscreen with headrest monitors, JL components, coaxials, sub, 5ch amp. bell tech 2/4 drop. 22x10 ss wheels with 285/35/22 bfgs.
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