Plug reading experts ...take a look

[q6543]

Plug reading experts ...take a look.

^That was supposed to be the title^

This pull
Averaged 19.2#s of boost
Afr 11.17
Spark 19.7 degrees
Fuel is pump E85 with M5 meth injection

 

[03cobra#694]

Umm, a little more info is needed.

 

[03cobra#694]

Umm, a little more info is needed

 

[Black02GT]

Well... it's broken. Car, engine, compression, etc.

Guess not a 4.6 since why meth + e85 at that boost. So, high boost 5.0?

 

[JaCobro]

Just one plug? If so. Replace and run it again. Unless more damage was done?
Looks like a brand new plug, other than broken.

 

[q6543]

?? I cut the plug for the fuel ring.

331 sbf 8.5 to 1 compression.
Vortech Ti trim

 

[q6543]

Because tests showed E85 makes more power with M5.

 

[JaCobro]

Hard telling. Looks a little hot. And see a bit of oil cracking? What exactly are you looking for?

 

[q6543]

I just wanted input on the fuel ring and timing mark.

Should I pull more fuel, or timing or add or whatever... I wanted some expert opinions.

 

[Thorpz]

Here is a plug reading video from Steve Morris he is the tuner of Tom Bailey and other "drag week" type cars. One of the best plug reading videos I have seen.

 

[q6543]

That is a great video!
So fuel looks great and I can sneak up on a 1 more degree or 2 until MPH falls off.

 

[CobraBob]

Wow, SVTP comes through again. AWESOME info link you provided, @Thorpz. Well done!

 

[Black02GT]

Here is a plug reading video from Steve Morris he is the tuner of Tom Bailey and other "drag week" type cars. One of the best plug reading videos I have seen.

Well I learned something. I didn't know anyone actually cut the plugs to read them. Definitely seems like you can get a lot of info out of it.

 

[SecondhandSnake]

Just going by the teachings of the old timers and the ancient Chilton/Haynes texts (which don't touch on E85 unfortunately, and is much cleaner burning making it tougher to read), it looks about right for fueling both at WOT and idle. Heat range is right. Timing mark looks about right too. The rule of thumb I was always taught is you want the timing mark about halfway down the strap. I wouldn't add any timing but that's just based on the plugs- it's a lot more accurate to judge where you are if you have an actual measurement approach, such as a dyno or even dragstrip.

 

[roy_1031]

That’s very cool. What tool did you use to cut the plugs?


Sent from my iPhone using Tapatalk Pro

 

[q6543]

I put a Sawzall blade in my vice... and put the sparkplug in my drill.

Slow cut from the base thread... then let her rip.

 

[CobraBob]

We’ll, that was clever. I would never have thought to try a SawzAll blade in a vice.

 

[SecondhandSnake]

I put a Sawzall blade in my vice... and put the sparkplug in my drill.

Slow cut from the base thread... then let her rip.

I never thought of doing that with plugs. I usually put a drill in the vise, put a quick clamp on the trigger, and use a cutting tool for a quick and dirty redneck lathe. I might have to try that in the future.