Plug / Plug Gap suggestions
Thread Starter
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
Plug / Plug Gap suggestions
On my 2016 Z06 im running into what seems like spark blow out. I ran into this last year after headers and it fixed it then by gapping my plugs from .040 down to .030 (NGK 1 step colder). But, with these changes I'm seeing the same traits. Here are my mods an I would like to know what you reccomend for plugs and gap?
- BTR stage 3 cam
- Whipple 2.9 @ 14.5 PSI
- 103mm TB
- 5" cold air intake
- 2" ARH long tubes
- Alky meth - 2 nozzle (M10&M15) set to just below 4
- DSX low side fuel system
- DSX E85 sensor running full e85
- Mighty Mouse breather / catch can extreme setup
- Cordes HX
- Big 3 expansion tank
Last edited by BigJay08; Mar 6, 2020 at 09:35 AM.
Drifting
Joined: Jun 2000
Posts: 1,577
Likes: 99
From: Dubai, UAE
What symptoms are you seeing? Is it something that showed up in HPT scan? It could be something else other than plug gap
NGKs did not work for me at 15 psi. Had to switch to Brisk RR12S with their stock gap (0.029")
NGKs did not work for me at 15 psi. Had to switch to Brisk RR12S with their stock gap (0.029")
Thread Starter
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
Are you running a PD or centri blower? Im curious if the two different blower types make a difference. My shop did a pro charger setup at 22 psi and somehow it worked with NGK's for him.
Thread Starter
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
you guys you have convinced me to switch out to brisk for a safer setup. My remaining question is should I stick with 1 step colder or 2 steps colder. Im in Ohio & I do tend to drive in cooler weather (40/50 degree weather). Any concerns there running E85 & meth?
Drifting
Joined: Jun 2000
Posts: 1,577
Likes: 99
From: Dubai, UAE
My personal recommendation is to go with Brisk RR12S (2 steps colder). If you find that those plugs foul easily due to driving style, weather temp or fuel type then you can switch to Brisk RR14S (1 step colder)
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Thread Starter
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
running 0 ohm granatelli wires & all are connected firmly. I’m going to try tapping mine down 5 thousands to see if that helps to bring me to .025 but ordered a set of bricks also
Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 296
From: Savannah GA
Cruise-In IV Veteran
I heard a ton of good things about Brisk silver's so I went 1 step colder (1000 wheel F1A-94 + Holley port build) and MSD wires. I ended up losing the insulator on one brisk plug and lost the tip on another. I wasn't happy about that switched back to 1 step colder NGK iridium and never had a single problem. Not saying Brisk are bad plugs just giving my experience. I am not running meth due to the Holley Port. But in my new TS 416ci stroker build I should have done within a week I am going to stick back with my same NGK 1 step colder and see how well they do. Running a VR stage 3 cam, 416ci, F1A-94, Holley Port, and every supporting mod possible. I may need to go two steps colder we will see. I am at 21psi of boost.
I pulled my heads off last week on my stocker and could see some light scoring on the cylinder walls where the spark plug tips came off. I still pulled 180+ psi compression so it wasn't awful, but wasn't happy either.
I pulled my heads off last week on my stocker and could see some light scoring on the cylinder walls where the spark plug tips came off. I still pulled 180+ psi compression so it wasn't awful, but wasn't happy either.
Thread Starter
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
I ended up going with brisk silver (one step colder) and gapped them to .026. The whipple manual calls for gap to be .028 & I figured that didn't account for the boost level have. It did fix my blow out issue with no idle problems / misfires.
