afr gauge vs plug colour

[BENDER 151]

running a 2011 m8 with a cutler stage 2,7500 ft elev.. can't seem to get my numbers past 11 on afr gauge.check plugs and they look white/tan.too white in my opinion.oh should say i was running 7lbs boost.sled pulled good and was crisp but if I'm not mistaken isn't 10/11 on the gauge mean its richer.my first turbo so i don't really no wat the plug colour should b.any comments r appreciated

 

[BENDER 151]

forgott to mention I'm running 50/50 av and 91.

 

[RACINSTATION]

Placement of the probes and the fuel you are running will affect the plug color.

11.8 to 12.2 is a good range to shoot for at wide open throttle.

Plug color is and always has been a good indicator and I would trust first the way the sled runs, second -wetline in the pipe, third - plug color, and finally the gauge.

On a turbo, I would turn the fuel up much richer until it starts sputtering on the top end and then back it off from there. They seem to be more on/off than a naturally aspirated sled and if they are running a bit rich you WILL know. Be careful because too rich is just as bad as too lean for the reeds.

 

[BENDER 151]

thanks for the info station.ill give that a go.i started at 37 lbs and went up to 39 and added 1/2 point on yellow and red in the attitude box.ran it like that all day,gonna head out to the shop and check them right now..

 

[BENDER 151]

gonna up the fuel pressure a couple lbs and go from there thanks again r/s

 

[akMcat]

I've ran quite a bit of a gas in big bores and it almost always shows a white, ashy burn on the plugs. I'm not sure why or if it does the same thing when mixed 50/50. But plug color for me when running av has never been a good indicator of how rich/lean my engine was running.

 

[HIDY]

I would never read plugs running av too hard to read.

 

[dunatyk]

Elaborate more on the wet line

 

[Boyko]

Your A/F gauge.... sensor, sounds like its fricked

on a 2-smoke if you dip into the 11s you should get a bog at WFO at low boost

You can tune blind, add lots of fuel at WFO, make it bog, and than start pulling fuel until it cleans up. Not a good way to do it but plugs are cheaper than pistons

Read the ground strap on the plug, it knows

 

[HOOCH256]

Elaborate more on the wet line

Ya what his guy said