Gen IV Spark plugs

[Shannon Whitehead]

#151368

Depending on how many miles you have on your car, the gaps will still likely be in spec. I replaced the spark plugs on mine at around 12,000-ish miles, and the gaps were all still pretty close to where they should be. The plugs themselves appeared to be in good shape as well, but I went ahead and replaced them anyway since it is relatively easy and cheap to do. The car didn’t really run much different afterward.

As for the ACR-X running a colder heat range, they must have found that under racing conditions the standard heat range plugs were causing issues. The decision to run a colder plug on your car would have to be made based on your intended use of the car…if you are mostly driving on the street, the stock heat range will likely be fine. About the only way I can think of to determine the best heat range would be to read plugs after some dyno pulls.

[Shannon Whitehead]

#151372

My car is getting close to 13K miles so I am sure they don’t NEED to be changed, but I am swapping intakes, installing headers, and swapping valve covers anyway so may as well install new plugs while I am in there. I have never had a bad experience with Champion but do know it was advisable on all my Turbo and Supercharged cars to use a NGK plug.

Any positives/negatives for plug brands/types?

Any data on either brand being more prone to fouling or anything?

[Shannon Whitehead]

#151376

I don’t have any Viper spark plug experience outside of the OEM Champion plugs…when I replaced them, that’s what I used. I’ve had very good luck with NGK on my previous LS-1 Camaro, and I also run NGKs in my daily driven truck. Honestly, I don’t think you can really go wrong provided they are the right threat pitch/diameter, seat configuration, depth and heat range.

[Shannon Whitehead]

#16245

Did a search but came up with a lot of Gen II/III stuff but not much Gen IV.

Doing a build with my GenIV, just bolt on stuff like exhaust, Gen5 intake, HP Tuners etc… While I have all the stuff torn apart was going to change out spark plugs and get the gap correct. I found that the ACR and ACRX use different spark plugs. Is there a reason for this? Is there a benefit using the ACRX part in a street car? I was provided this list. Can anyone tell me what the pros and cons are of anything other than OEM?
[TABLE=”width: 507″]
[TR]
[TD=”colspan: 5″]Compatible Spark Plugs[/TD]
[/TR]
[TR]
[TD]Brand[/TD]
[TD]Part Number(s)[/TD]
[TD]Type[/TD]
[TD]Heat Range[/TD]
[TD]Application[/TD]
[/TR]
[TR]
[TD]Champion[/TD]
[TD]RE10PMC5 (3032)[/TD]
[TD]Single Platinum[/TD]
[TD]10[/TD]
[TD]OEM[/TD]
[/TR]
[TR]
[TD]Champion[/TD]
[TD]RE10PMPB5 (7032)[/TD]
[TD]Double Platinum[/TD]
[TD]10[/TD]
[TD]OEM Replacement[/TD]
[/TR]
[TR]
[TD]Champion[/TD]
[TD]RE7PYP6 (7437)[/TD]
[TD]Double Platinum[/TD]
[TD]7[/TD]
[TD]ACR-X[/TD]
[/TR]
[TR]
[TD]NGK[/TD]
[TD]LZTR5A-13 (4306)[/TD]
[TD]V-Power[/TD]
[TD]5[/TD]
[TD]OEM Replacement[/TD]
[/TR]
[TR]
[TD]NGK[/TD]
[TD]LZTR5AGP (3381)[/TD]
[TD]G-Power[/TD]
[TD]5[/TD]
[TD]OEM Replacement[/TD]
[/TR]
[TR]
[TD]NGK[/TD]
[TD]PLZTR5A-13 (4998)[/TD]
[TD]Laser Platinum[/TD]
[TD]5[/TD]
[TD]OEM Replacement[/TD]
[/TR]
[TR]
[TD]NGK[/TD]
[TD]LZTR5AIX-13 (2314)[/TD]
[TD]Iridium IX[/TD]
[TD]5[/TD]
[TD]OEM Replacement[/TD]
[/TR]
[/TABLE]

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