What kind of spark plugs?
Posted 11 August 2004 - 06:27 AM
Past truck-2001 Chevy silverado Z71, Shortbed Regular cab, 4.8 V-8, custom tune by Brian, K&N FIPK-sold
Posted 11 August 2004 - 07:48 AM
I'm going to replace my plugs and wires this month with MSD super conductors and NGK tr55 plugs and see how that combo works.
Posted 11 August 2004 - 07:51 AM
Posted 11 August 2004 - 09:25 AM
Posted 11 August 2004 - 10:17 AM
With spark plugs I think they have more to do with MPG than we realize. I have a friend with a 94' Ragner with TWO spark plugs per cylinder. This is why his 4 cyl gets worse gas mileage than my 4.3L V6 (well about the same really). Anytime you have more spark its gonna change the combustion in the cylinders, therefore changing your MPG. This is just a theory of course.
I have a platinum splitfires, the ones with 4 prongs if i remember right (very pricey). I did notice a drop in MPG, have no idea if that is what it's from or not though. i'm assuming it is because no other mods were present at the time. i'm planning on changing wires and plugs soon too, we'll see if that mpg gets any boost...
When changing spark plugs I always felt it was best to stay with Delco plugs. I've used them in my truck for years, and even my father just threw a set of Delco plugs in his 01' Z28. I have heard great thigns about MSD wires though.
1994 Silverado RCSB 4.3L
2012 Jetta TDI
Posted 11 August 2004 - 12:21 PM
Posted 11 August 2004 - 05:22 PM
Posted 12 August 2004 - 07:00 AM
'10 2500HD 4x4 CC 6.0
'01 C1500 Suburban
1960 4x4 Willys Wagon
Posted 12 August 2004 - 08:06 AM
Posted 12 August 2004 - 10:15 AM
Posted 12 August 2004 - 10:27 AM
There is one set for coils that have the P/N 12558693 (first design) and another set for coils with P/N 19005218 (second design).
The aftermarket wires I looked at don't distinguish between these two coils. I don't know what the difference is, and the Delco's aren't all that expensive (about $50) so I'm going with them once I figure out which coils I have.
Hopefully, all 8 coils are the same.
I would guess that 99's probably use the first design, and 2001's probably use the second design.
Posted 12 August 2004 - 10:31 AM
(This is for 2000 model year 5.3 liter)
The "old design" wires (P/N 88894394/748HH) for coils with P/N 12558693 are 10.5" long.
The "new design" wires (P/N 88892762/748GG) for coils with P/N 19005218 are 9.2" long.
Both are listed as 7mm dia. wires.
(this is from www.rockauto.com)
Posted 12 August 2004 - 07:54 PM
When I removed the Delco platinums to install the Denso Irridiums, they were fine, (only 37.5 k on them), except that the gaps were inconsistent. Factory spec is .060, and they ranged from .045 to .065. The Denso's are expensive as poop, but I was a Toyota tech for a long time and know they make a good plug. I gapped em at .055 and everythings running nicely.
I honestly did't feel any difference after changing the plugs and wires, but then again, the stuff I took out was in good shape and could've stayed on there, but you know how it is...you gotta mess with something right? Hey, if anything else, it looks cool.
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5.3 Z71 RC/SB - Comp 206/212 .515/.520 114, 02 LS6 Springs, Harland Sharp 1.7:1's, 02 PCMforLess PCM, Volant CAI w/ Ram Air, StainlessWorks LT's and catted Y-pipe, Gibson Single in Dual out, 05 e-fans, 34" radiator, 160*stat, PermaCool trans cooler, 3.73 G80, TA Rear Diff Girdle, Belltech 2" lowering keys, Belltech 2" Drop Shackles, 2" 4x4 Lift Blocks Removed, Joe Gibbs 20's w/ Toyo Proxes 285/50's
Posted 12 August 2004 - 08:24 PM
Spark plugs? Real trucks don't have spark plugs!
What kind of spark plugs did you use ...
3500HD LTZ CC LB DRW Go-power by Max & Allie
Proud Member #755 of the 3500 Dually Club
My truck has training wheels
Posted 12 August 2004 - 11:35 PM
2008 Chevy Silverado Z71 4x4 Crew Cab 6.0L 3.73 Blue Granite