Jump to content
SAU Community

Can Your Read This Plug For Me? ....please...

GD51LA

By GD51LA,
in Engines & Forced Induction

 Share

Recommended Posts

The Dan Grand Master

The Dan

Posted
Posted
Looks quite rich fouled. Also is the crush washer crushed? What heat range.

How is that rich fouled?

The black around the ring is normal for any turboed engine. The center is where you should be looking

:/ Damn, I thought he did a pretty good job as it is! lol

Yeah I was joking lmao

rob82 Mentor

rob82

Posted
Posted
How is that rich fouled?

The black around the ring is normal for any turboed engine. The center is where you should be looking

Yeah I was joking lmao

It looks as tho its been rich fouled and then it has partially cleaned up. Hence the heavy carbon layer around the plug end.

Supa Steve Enthusiast

Supa Steve

Posted
Posted (edited)
It looks as tho its been rich fouled and then it has partially cleaned up. Hence the heavy carbon layer around the plug end.

This post is pretty close to the mark but without running the engine right to get a proper plug read the results can be decieving. Need to see the ground strap to get an idea of heat range/timing and also cut the thread off it to get a look at the fuel line. This looks fairly rich that has been cleaned up by the car idleing hence the clean porcelain near the electrode but again the plug has been in the engine too long to correctly read as there is quite a thick carbon build up. I hope thats not aluminium deposits i can see (silver spots) and if so there has been some detanation causing the edge of the quench pad to be deposited on the base ring . Throw a fresh set of plugs in and do a full noise run then shut it down before it returns to idle as this will allow the plug to be read accurately.

Edited by Supa Steve
The Dan Grand Master

The Dan

Posted
Posted
It looks as tho its been rich fouled and then it has partially cleaned up. Hence the heavy carbon layer around the plug end.

rich - yes.....fouled - no

Pull out any turbo spark plug and it will look like that. The black is normal. The centre of the plug tells you what condition the cylinder is running in. White is lean and black is rich, light brown is perfect. If it has deposits on the outer and/or centre electrode (which it does have tiny amounts) it would usually indicate poor fuel quality/additives or slight burning of oil but I think it would be fuel moreso in this case

The Dan Grand Master

The Dan

Posted
Posted
This post is pretty close to the mark but without running the engine right to get a proper plug read the results can be decieving. Need to see the ground strap to get an idea of heat range/timing and also cut the thread off it to get a look at the fuel line. This looks like its a rich tune that has been cleaned up at idle hence the clean porcelain near the electrode. A proper run then shutdown will allow the plug to be read accurately.

This is also true but still normal for these engines to run rich at peak torque or midrange. Anything less will usually kill them

rob82 Mentor

rob82

Posted
Posted (edited)
rich - yes.....fouled - no

Pull out any turbo spark plug and it will look like that. The black is normal. The centre of the plug tells you what condition the cylinder is running in. White is lean and black is rich, light brown is perfect. If it has deposits on the outer and/or centre electrode (which it does have tiny amounts) it would usually indicate poor fuel quality/additives or slight burning of oil but I think it would be fuel moreso in this case

That amount of carbon build up around the thread end is not normal - I would be very dubious of the tune and or too colder plug.

If my tune resulted in a plug that read like that I would concerned.

Edited by rob82
GD51LA Mentor

GD51LA

Posted
  • Author
Posted

some fat feedback boys. as usual :P

those shots were taken from my new canon camera :happy: i thought it would need a great picture for us to read it properly

ok so i put in a new plug, drive it to 8k then turn it off, right?

no tune, its completely standard just exhaust/front pipes/5cat..

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      DeAgostini 1/8 scale BNR32 Nissan Skyline GT-R Nismo

      By Duncan · Posted

      wow that is super detailed!
    • RB335
      C-red tuning?

      By RB335 · Posted

      Seemed to be good when Jeff owned it but they did a shit job on my car, probably worth a think before spending 10's of thousands of dollars where they might be cutting corners
    • Rezz
      DeAgostini 1/8 scale BNR32 Nissan Skyline GT-R Nismo

      By Rezz · Posted

      Starting with issues 1 - 5, we have already run into a problem...!  Issue #4 contained 2x front brake calipers, instead of 1 caliper and 1x steering knuckle. Will have to call DeAgostini on Monday to sort it out. Anyway here's some photos.  Issue #1 is the front bumper, headlights and number plate. Issue #2 is the front wheel (with "We produced with spartan air." text on the centre cap!) and tyre, the front lip spoiler and cylinder head cover with ignition coils under the centre cover... which will never be seen again. Issue #3 is the bonnet and cylinder head. Issue #4 is the front strut, brake disc (with laser etched metal discs) and brake caliper. I stopped here because of the issue with the missing steering knuckle.  Next update will be #5 - #10 in a few weeks.
    • Rezz
      DeAgostini 1/8 scale BNR32 Nissan Skyline GT-R Nismo

      By Rezz · Posted

      DeAgostini is one of a few companies that release quite large (the largest commonly available size actually) 1/8 scale models in a series of weekly issues over 100 - 110 instalments.  They release different models for different markets and DeAgostini Japan have release the BNR32 Skyline GT-R Nismo last month. I've made two of these 1/8 scale sized cars (one an R35 GT-R from 2012 - 2014, the other I'm just about halfway through, a BNR34 Skyline GT-R from the 2Fast 2Furious movie) so when this R32 was announced there was no way I could ignore it as it's my favourite out of all Nissans.  Each issue costs around $20 so it costs about $2.2K when completed. I suppose it is very expensive for what it is, but the quality and details are really very good, and there are many "gimmicks" like fully functioning exterior and interior lights operated with a remote control, working steering, all doors/bonnet/boot/fuel lid open and close, the side mirrors fold in and it even has a speaker for the engine revving sounds when you turn the lights on.  Each issue comes with a magazine that tells the story of the BNR32 Skyline GT-R Nismo from the first design stages of the BNR32 to Group A homologation and the various racing version that were run in the Japanese Group A and JGTC, and Australian Group A.  So I plan to update the build in this thread 5 issues at a time.  https://deagostini.jp/r32/?srsltid=AfmBOooKjxDc4EUK2rmXqMBPgyHfFJ24s4oEPJBNpnF-lFlsRoW0PE6P
    • Predator1
      Billet Merge Collector for manifold

      By Predator1 · Posted

      As per title.. has anyone used so far? Keen to hear results, comparisons. In the market for a new mani for my new turbo. Any issues cracking?
×
×
  • Create New...