I searched and what I found was 2019 or older. It's past time to replace my coil packs and plugs and I was curious what people would recommend. I have upgraded turbos, etc. The car made 526whp on a Mustang dyno at around 16 psi. Since this, I have changed the exhaust from a 2.5" system with 200 cell cats to a 3" system with 100 cell cats, added a water/meth injection kit and the boost is now around 18 psi. What coils, plugs and gap would you run?

Thanks in advance.

 

Where has everyone on this forum gone?

 

Use stock plugs and 997 turbo coils. At least on my car, I had to use a 996 turbo coil on the center, passenger side as the 997 one was too large to fit. So buy 5 997 coils and 1 996 coil

 

I would really prefer to run a heat range colder and a smaller gap than stock. What do you have done to your car?

 

You don't need to. I think pwdrhound ran stock plugs/gap to something like 700whp. I'm making 550whp with stock plugs/gap no issues.

 

I did a little research and it appears you're correct. Most of what I found still recommends the stock heat range and gap. One example is the plug Evolution Motorsports recommended for their GT and EVT775 package. It still uses the stock gap and heat range. Markski does gap his recommended plugs down to 0.026". Thanks for the feedback.

 

i have had years of trouble free running with stock the usual bosch ( or beru ) fr6ldc's and the oem fitment 997 ( beru? ) coils and the plugs are good straight from the box. but 027 was the recommended gap by my cars previous fiddlers. but i use 'em out of the box as pre-gapped. perfect.

i know nothing of your added fuel injection setup? but i see no reason why the stock coils and plugs wouldn't handle your increased power as they can for all other bolt on power added 996tt's.

and yeah..agree, a shame about this sub forum. where have all the flowers gone? ( it's a song lol ).

https://www.sparkplug-crossreference...OSCH_PN/FR6LDC

i also for kicks found this cross ref site just now on plugs. i also had a flash of memory and noted that the originally supplied factory plug heat range was a 5! updated to a 6

 

I'm struggling to make my final decision. Not really a fan of copper/nickel plugs (that's what came with the kit I bought). I know Platinum and Iridium will last longer and that's important since they're not the easiest to change. I wish I knew what was in my car, because I've had no issues in 70,000 miles of ownership with my plugs or coils. They were probably changed when EVOMS installed the GT610 package. It will be interesting to see what's in there once removed.

Below are some plug details.

Apparently the OE Porsche plug is one of the plugs below
Bosch FR-6-LDC: Center electrode core material = Nickel and center electrode tip material = Nickel (0.035)
Beru 14 FR6 LDU: (0.031)

Denso website Recommendations (all will need to be re-gap, since they come 0.040-0.044)
With Denso, the stock heat range is represented by 20.
PK20TT: Center electrode core material = Nickel and center electrode tip material = Platinum (0.040)
IK20TT: Center electrode core material = Copper and center electrode tip material = Iridium (0.040)
K20TXR: Center electrode core material = Nickel and center electrode tip material = Copper (0.040) - This is the most like the OE plugs
IK20: Center electrode core material = Nickel and center electrode tip material = Copper (0.044)
Denson Tuner/Supplier Recommendations
Denso XU22EOPR-U: Center electrode core material = Nickel and center electrode tip material = Nickel (0.035) These came with my coil/spark plug kit, but are one heat range colder than stock)
Denso PK20PR-P8: Center electrode core material = Platinum and center electrode tip material = Platinum (0.031) - EVOMS recommendation (potentially what's in my car)

NGK website recommendation
With NGK, the stock heat range is represented by 6.
IFR611: Center electrode core material = Copper and center electrode tip material = Iridium (0.044)
BKR6EQUP: Center electrode core material = Copper and center electrode tip material = Platinum (0.020) - NGK states that these are the OE equivalent
FR6BHX-S: Center electrode core material = Copper and center electrode tip material = Ruthenium (0.032)
BKR6EIX: Center electrode core material = Copper and center electrode tip material = Iridium (0.032)
BKR6EGP: Center electrode core material = Copper and center electrode tip material = Platinum (0.040)
BKR6EKUB: Center electrode core material = Copper and center electrode tip material = Nickel (0.020)
BKR6E: Center electrode core material = Copper and center electrode tip material = Nickel (0.032)
NGK Tuner/Supplier Recommendations
Markski Tuning Recommendation = NGK (not sure of the part number)

All of this research has brought me to the conclusion that I'm going to take my car apart, see what I have and replace them with the same parts.

 

You're really over thinking this. Buy stock plugs. Take them out of the box and install them. Done.

 

Tood @ Protomotive recommended the Denso PK20PR-P8 with my setup in my signature. Been running these plugs exclusively for the last 10 years or so. I think they are gapped out of the box @ .028, if my memory serves me right. Hope this helps. I'm sure these would be fine, I'm sure stock would be fine too. How many miles do you put on your car a year?

 

Looking to change mine too.

 

As expected I have the Denso PK20PR-P8 plugs. They have worked well for the 70,000 miles I've driven the car. I'm changing the coils, but surprised I haven't had an issue and they're 996 coils. New plugs on order.