When your exhaust tips are covered in black does it mean your car is running richer or leaner? Before I installed my meth kit the tips would always get alot of black around them now that I have the meth I was at the track all day smashing the car and there was NO black around the tips! got me alittle worried lol

 

Black tips indicate running rich.
That does not mean that you aren't also running lean.
So get a gauge and find out for sure to be on the safe side.

 

if you are modded enough to be running meth injection, you should have a wideband O2 installed on your car so you can constantly monitor your A/Fs and datalog.

generally, black means running rich.....

 

Hmm good point, I was under the impression that the meth increases octane making it less likely I'll run lean, I would have to be running lean becase I have ZERO black on my tips after a whole day of giving the car hell! I'm worried now lol

 

Like they said you should monitor afr via a sensor/gauge. My tips are always black i dont even bother cleaing them anymore.

 

see unless I got the pillar gauges I dont want messy gauges laying around! if I took it to a dyno or tuner and got the problem fixed shouldnt that be the end of it? or does a/f ratio change all the time?

 

what does that even mean? you can run meth injection on a completely stock geo metro if you want. some people run it on 100% stock NA cars and subtract a little fuel to see even better MPG.

using meth does not mean you are modded or "so modded you require meth" what ever that would mean.

 

I use an LC-1, I wired mine up so it plugs in my cig lighter so any time i want to check my a/f ratio i can slap it in the car, do a few runs then take it off. I can install it in around 5 minutes or less. no need for a gauge pod or to hack up any car wire harnesses. it plugs in my laptop and i am good to go and if any friends need to use it they can hook it up on their car in 5 minutes and be checking their a/f ratio too!

If you are running those mods in your sig without a tune, you are rich. I would get a tune and pick up about 30whp I use inmotion and have no lean issues at all.

 

Just admit it P-Man.

Yer SPRAYIN' !!!!

 

sprayin and fakin timeslips yo!

 

dash daq with zt-2 and you can moniter just about everything!

 

Don't forget about the tripp'n mushrooms either

 

Photoman is right some people put meth kits on stock cars so they can use lower grade octane fuel, works out cheaper.

Photoman I think I'm running lean though because my tips are getting no black build up what so ever, unless that is due to the meth somehow?

those a/f ratio gadgets are pretty neat but there also pretty expensive there good for people that do heaps of track and stuff but I only get to get to the 1/4 a few times a year, I'd rather fix the problem once then it should be okay I hope!!

 

In the day the tips were black cause of the extra rich fuel. White was good to lean BECAUSE there was tetraethyl lead in the fuel. One autocrosser runs leaded fuel and his pipes are sno white, and rotting out but white.'

Black is typical today, smoke is rich. You need a gauge if your gonna be concerned about mixture.

Woody

 

You can pick up a used lc-1 for around $125 or just hit up a dyno somewhere and get your a/f ratio, should run you about $50

 

Woody am I correct in thinking when I installed the Catch can that I should see less black in the pipes, because of taking the oil and crap out before it reaches the intake , (givin the A/F misture is correct )

Howard

 

Howard,
In theory that is probably correct, to some degree. The catch can is more to keep the oil vapors out of your intake system where it coats everything and causes a gunky build up over time. This degrades the function of sensors that it gets on(MAF, MAP, etc). The black exhaust tips is more just a function of air vs high fuel ratio. I think that oil burning is also more of a blue/white color, if your burning oil.

 

Not burning any oil , no oil loss between changes and the car runs extremely well , I was curious if the oil vapors would cause the black , it's really not that bad , But I need to get a tune so I can be sure it's where it needs to be,,,, Thanks Mike

Howard