hey guys, quick question. im going and picking up an apexi afc neo today for a killer price. i already have the lex afm but no 550 inj. will i be able to adj it far enough with the neo for a decent tune? current mods are full turbo back 3'' exhaust. aem widebank. apexi intake. the lexus afm isnt installed yet. iv just had it sitting around for awhile. thanks guys
lex afm, apexi neo, 440 inj. will this work
- Thread starter mnracer550
- Start date
If your still on stock turbo its not worth it and even with a 57trim it still might would not be worth it unless you had a walbro which at that point you might as well get the 550's so you dont run out of fuel.
Can it be done yes, but its not reccomended.
Can it be done yes, but its not reccomended.
thanks for the info. im pickin up my 57 trim next week so ill jus wait for injectors for the lex afm
I wouldn't touch anything until you understand WHY the lex AFM mod works, and the additional mods you need to go with it. The older articles are some of the better ones, and for someone who actually knew what he was doing with the mod, look for John B Lunsford's (jblmk3) old setup.
^ true story. slap it on and set it rich wont ruin anything driving around for a day. but its not recommended. Waite until you can go standalone or have your wideband gauge installed so you can see exactly what your ratio is doing.. helpful tip also is to install your wideband before the mods so you can see what your "normal" afr is.
Lex/550 mod is an equal 25% fuel and air upgrade. Add just the lex and you will prolly raise the boost at this time and you have a good possibility of running lean.
True story: one of my buddies had a lex and 60-1 trim at 18psi. Him and a another person ran(I wasn't there) and he melted the number 6 piston(I saw the block and piston). This was on stock fuel upgraded turbo and lex.
True story: one of my buddies had a lex and 60-1 trim at 18psi. Him and a another person ran(I wasn't there) and he melted the number 6 piston(I saw the block and piston). This was on stock fuel upgraded turbo and lex.
If you add the lexus AFM on its own without the injectors, even with the SAFC Neo, you're still going to run lean. You'd have to run your existing, tired injectors at a much higher duty cycle than they'd be happy with, and still be running the risk of turning your combustion chamber into a plasma cutter. Never cheap out with a 7M. Ever. Not saying you have to spend an assload of money, but the old axiom of 'Fast. Cheap. Reliable. Pick two.' definitely applies.
If the boost remains relatively the same, the addition of ONLY a Lexus AFM will do no harm at all. The ECU has enough capability to correct for the "strange" air sensor data its getting. May also lower fuel cut to compensate, since it modifies the open loop mapping by what learned values its recorded in closed loop, though I have not personally experimented.
As with any mod, always remember to reset the ECU before running it.
As with any mod, always remember to reset the ECU before running it.
so I just picked up a afm off a lexus gs300 that had a 2jzge today and installed it, my car idles alot better is it going to be ok?
lol well regaurdless if it would have worked or not it dont matter now. blown hg as of last night. fml...
mkIIIman089;1634274 said:
Wrong.
Fuel trim can only correct up to 20% and that's only because of the O2 sensor feedback. The computer will realize something is wrong when the AFM readings are normal (lexus and supra electronics are the same, difference is the housing) but the afr is wacky.
I wouldn't do it and would advise against it.
You say that like you've read it on the interweb, no doubt written by an "expert".
I've tried, tested, and logged all of what I just described, myself. Might want to check yourself before spreading hearsay over tested fact.
I've tried, tested, and logged all of what I just described, myself. Might want to check yourself before spreading hearsay over tested fact.