I am currently running Bosch +4 and tomorrow I will be changing plugs to AC Delco stock replacement.

1. Should I spend the extra time and index them or not to bother?

2. Do our cars come with some type of factory spark amplifire? This one salesman told me that they do?

PS. I will be upgrading my ingition and buying a HP coil soon.

Thanks.



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89Iroc, 305 TPI, WC T5, 3.08 Posi, Flowtech Headers 1 1/2, Hooker Y-Pipe 2 1/2, 3 inch over the axle, Flowmaster 80, No Cat, Aluminium Driveshaft, Ported Plenum, Air Foil, MAF Screens/Fins removed, K&N, Gutted Air Boxes, AFPR @45 psi, Ram Air, Throttle Body By-pass, Bumped Timing @12, Bosch +4, MSD 8mm wires, HP Rotor, Cap and Fuel Filter, Sensi Trac rear Shocks.

 

I have indexed my plugs before. It's a lot of work and I'm not sure If I gained anything. I think it's more important for higher horse applications though I firmly believe in the "every little bit helps" philosophy.
Spark booster? Never heard of it. You should have the standard GM HEI ingnition. Maybe he's talking about a resistor type plug for radio noise suppression.
Also MSD says you should not run platinum plugs with their boxes.


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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

Why not just file the side electrode back to about halfway across the center electrode. That minimizes any shrouding effects and should be somewhat less sensitive to the orientation of the plugs relative to the cylinders.

Norm


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1979 Malibu w/some cornering tweaks and a few other interesting things

 

Good idea Norm. I like that. Gonna have to give it a try. Did you notice any difference when you did that? Or have you done that?

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1986 SC Camaro
Mods: Threw 2.8 in garbage, put in rebuilt
350 .060 over, XE268H Comp cam, Edlebrock
Performer Intake and Edlebrock 600 CFM Carb,
Pete Jackson noisy GearDrive (which sounded
cool for about 5 minutes, now I'm sick of it)
Rebuilt TH350, 3.42 Rear Gears. LCA RLB's.

 

Doesn't a cut plug wear down faster than an untouched plug?

I indexed my plugs once... no idea if it gave me that 1 HP or not, so now I just eat a lighter lunch & don't index the plugs.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

If you get up around 600 plus HP, it might help. Or, if you are running some type of boost. In a typical street engine you won't gain anything. Cutting the plugs will just decrease life.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

What's wrong with platinum plugs and MSD? I've never heard that before.