My TT is running Rich
#2
Jon
#3
Have you put it on a Durametric and measured the air:fuel ratio? Does it run rich all the time, or just when it's cold? How can you tell it's running rich from looking at the exhaust - soot on the exhaust tips? If I were you, I wouldn't change anything until I collected some data.
Jon
Jon
+1
I also have to ask , what makes you thing its running rich.
Any other symptoms
AS above advice , get it checked out first for codes and have some logs taken.
#5
They all run rich when the engine is cold, so soot deposits on the ends of the exhaust. Doesn't mean anything.
If you hook up a Durametric, you can read the air:fuel ratio in real time, record it during boost run, etc. It's reported as lambda value, which is the ratio of the actual ratio to stoichiometric, which is 14.7. You should see lambda=1 most of the time, and it will fall to somewhere between 0.72 - 0.85 under boost, depending on your tune.
Hope that helps.
Jon
If you hook up a Durametric, you can read the air:fuel ratio in real time, record it during boost run, etc. It's reported as lambda value, which is the ratio of the actual ratio to stoichiometric, which is 14.7. You should see lambda=1 most of the time, and it will fall to somewhere between 0.72 - 0.85 under boost, depending on your tune.
Hope that helps.
Jon
#7
Jon
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#8
Don't do this. You are almost always better off with higher octane.
#9
P.S. It always bothers me a little when people talk about "detonation" rather than correctly specifying that it's detonating too soon. If fuel didn't detonate, a car wouldn't run.
#10
Exactly. Just run the recommended fuel and clean your tips regularly. You're risking pre-detonation /advanced timing by running lower octane.
P.S. It always bothers me a little when people talk about "detonation" rather than correctly specifying that it's detonating too soon. If fuel didn't detonate, a car wouldn't run.
P.S. It always bothers me a little when people talk about "detonation" rather than correctly specifying that it's detonating too soon. If fuel didn't detonate, a car wouldn't run.
#12
There is difference between detonation and normal combustion (burning). You don't want your fuel to "detonate" under any circumstance. Detonation causes a huge rapid increase in pressure and temperature resulting in bent rods.
#13
If I recall correctly hes running the ams K16s with OEM injectors...
running richer is always better then leaner... unless you like to experience the 4th of july all over again in September...
Get a duramtric and log your car....
running richer is always better then leaner... unless you like to experience the 4th of july all over again in September...
Get a duramtric and log your car....
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
#14
But that's probably too much Labor Day partying and my foreign mother who was an English nut speaking...
In the real world, you're correct, people always talk about "detonation" to mean "pre-detonation" so I have no problem admitting I'm colloquially incorrect...
Last edited by teflon_jones; 09-05-2011 at 07:12 PM.
#15
I don't mean to be an English teacher here but "detonation" means something igniting under compression resulting in a force that's felt external to the ignition point. By definition, detonation is a natural part of car functions, and highly desired if you want to go anywhere.
But that's probably too much Labor Day partying and my foreign mother who was an English nut speaking...
In the real world, you're correct, people always talk about "detonation" to mean "pre-detonation" so I have no problem admitting I'm colloquially incorrect...
But that's probably too much Labor Day partying and my foreign mother who was an English nut speaking...
In the real world, you're correct, people always talk about "detonation" to mean "pre-detonation" so I have no problem admitting I'm colloquially incorrect...
http://en.wikipedia.org/wiki/Engine_...d_pre-ignition