So I added another Meth nozzle, and now the car is going leaner...
But... IDC did go down significantly, but I don't want it to go as low as its going... why is it going so low? MY afrs at wot are creeping up to 12.1...

 

Adding more methanol (fuel) is not going to cause the engine to go lean. Something else is happening. Whats the build? Need info on your set up.

Engine
EFI or Carbureted
Type supercharger or turbocharger
Intercooled or non-intercooled
Level of boost
Approximate horsepower
Type fluid your spraying

Rodney
How many nozzles/where they are located

 

Hmm ?? Are you using the meth spray as a way of getting around poor fuel supply ??

 

Adding more methanol (fuel) is not going to cause the engine to go lean. Something else is happening. Whats the build? Need info on your set up.
I know, that is why im getting confused, I added more meth to cool intake charge even more... and maybe up the boost 2 more psi some without pulling timing.

Engine
EFI or Carbureted EFI
Type supercharger or turbocharger turbonetics 66 Strim
Intercooled or non-intercooled intercooled
Level of boost 18 psi
Approximate horsepower 550rwhp
Type fluid your spraying 50/50 water meth

Rodney
How many nozzles/where they are located

Right after the throttle body, 2, an m10 and m14.
[/quote]

 

You sure the system is spraying? Is it using up the methanol mixture in the tank? At that power level with those two large nozzles Im suprised the engine isn't bogging. Those are huge nozzles for a engine like this on 50/50. What system do you have? Which pump is it?

Rodney

 

Yeah it's using the meth. It is a lebonte stage 3 kit which is progressive.

 

Whats IDC?

How do you know its going leaner? How are you reading air fuel?

Have you pulled the plugs to see what they look like?

Timing can effect air fuel reading a lot? How much timing are you running?

Adding water methanol injection is only going to fatten it up. Your adding more fuel to the engine. Its not going to lean it out. Something else is going on here.

Rodney

 

I am reading air fuel through an aem wideband
I didn't pull plugs because apparently either I cracked my stock block or blew a HG
Im running 19deg timing at full boost, car was tuned.

As for your last comment,... my thoughts exactly.

BUT... here is what I don't get. Why the sudden drop in IDC? It went from the usual 78% at the top of 4th to like 54%. Which is a HUGE drop, but didn't get TOO lean (I think the extra m14 helped it no full blown detonate itself to dead)

 

Tuning. If IDC stand for injector duty cycle then your tune is pulling fuel out when it see's the methanol flowing. Talk to your tuner unless your tuning it. Are you running a chip or aftermarket standalone or piggyback?

As for your block. I cracked mine once at that same power level. Booo

Rodney