I wanted to know what is the best plug to run? These are my mods. Currently running AC Delco Rapid Fires

-Ported Throttle Body
-Ported Intake
-Ported and Polished Heads
-Stainless steel valves
-Comp Cams 306 Hydraulic Roller Cam
-1.6 Ratio Magnum Tip Roller Rockers
-Comp Cam Chromemoly Push Rods
-LT4 Hydraulic Roller Lifters
-LT4 Knock Module
-Magnecro KV85 8.5mm Competition Wires
-Edelbrock Midlength Headers
-G2 Cold Air Intake
-K&N Air Filter
-3.42 Gears
-Ported MAF Sensor
-GM Performance Timing Chain
-180 Thermostat
-Air Foil
-Com Cams Dual Valve Springs
-Flowmaster 80 Series Exhaust
-No AIR
-No EGR
-No Cats
-LG Performance Lowering Kit
-High Performance Motor Mounts
-Stage 2 Clutch
-Free Mods
-Hypereutectic Pistons
-Bored .060
-Computer dyno tuning By Speedworks

 

I'm liking autolite 104s at .040

 

How much? and where can i get em?

 

With ported heads/HOTcam and all the bolt ons I ran all kinds of plugs. Champions, ACdelco (stock platinum and copper), and NGK. I did not notice a difference in any of them.

You didn't state your compression ratio, but if you've increased it I would go one heat range colder than stock.

 

$1.25 a piece or so at any parts store. They're 1 heat range colder then stock, one piece, good plugs.

 

But if I need more spark should I go with a hotter plug? Also when I pull my plugs out the tips is always all red I guess from too much heat, what do yall recommend.

 

If you need more spark you need a more powerful coil and better wires.

One heat range colder on the plugs will resist detonation.

 

the plug heat range doesnt denote the spark magnitude it denoted how quickly the plug can disspace heat.

 

So does that mean colder is always better? So colder would be better for what? I have wires so I just need a coil right?

 

It does not mean that colder is always better. It means that if you have bumped up the compression ratio and your motor is running closer to detonation than it was from the factory, a colder plug will be less of a "hot spot" in the combustion chamber, and therefore slightly reduce your risk for detonation.

Stock heat range plugs work fine for stock cars or cars with bolt ons, and even with mild heads/cam with no change in compression IMO. However, if you add boost, spray, or bump the compression up then you need to start looking at colder plugs.

 

So if I run my same setup with NOS what plug should I run? What do you personally recommend.

 

I'm not too familiar with nitrous, but if I had to guess I'd say a plug one heat range colder than stock, and knock the gap down .15 from what stock says(unless you have a really hot coil). The autolite 104 would be fine. Like I said, this is just a guess, the guys in the nitrous section would be able to help you out more. It also depends on how big of a shot you want to go with.

 

I agree

 

100 Shot. So if I put a bigger gap than .50 could it be better for my car with stock ignition? But if I get a coil and run 100 shot I should get a good plug ( which one) and gap it at like .40 or so?

 

AUTOLITE 104!
the autolite 106 is stock heat range

gap it at .050 which i believe is stock. if you run boost do .035-.040. nitrous.....ask the guys in the nitrous forum.....