Lexus AFM question.

siman

siman

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Mar 31, 2005
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Hey guys,

Since the old site is down and now we are rebuilding....

what is the max boost ( fuel cut ) on the Lexus 1uzfe AFM for our 7mgte's?

I searched but nothing came up on this site....so all i need is like the simple answer....

thanks,

Jonathan
 
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turboa7mgte

HECK YES I DID!!!
Mar 30, 2005
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Delavan, WI.
I am not sure there is a correct answer to that question....

I ran up to 20 PSi with the Lex/550's but that all depended on the weather and conditions.
 
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drjonez

Supramania Contributor
Mar 31, 2005
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the motor city
www.4cefed.com
FCO is not based on pressure, it's based on FLOW (hence the airflow meter, not boost meter). pressure != flow. that said, FCO will depend greatly on what turbo you have and what other mods you have. personally, my setup used to hit FCO around 11 psi or so on the lex....
 
supralover2000

supralover2000

12.8 and dropping..
Apr 4, 2005
132
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Long Island, NY
www.mk3.us
I have 1991 Turbo with lexus and 580cc injectors along with an HKS S-AFR and a 60 trim upgraded CT-26. I have seen Upwards of 22 psi consistantly with this setup, and Fuel cut has never been and issue.
 
siman

siman

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Mar 31, 2005
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no no guys...i am DEFINANTLY not sticking with an "upgraded CT"....gosh i thought you would remember my anti 60-1 trim upgrade arguments with Syst a while back hahahahahaha

I am going BB To4E probably.....since it spools quick and has a 500hp max....thats exactly what i want....I am having a time trying to find a good BB turbo though...

anyone have any recommendations on who sells good turbos? Besides SP...
 
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drjonez

Supramania Contributor
Mar 31, 2005
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the motor city
www.4cefed.com
siman said:
...I am going BB To4E probably.....since it spools quick and has a 500hp max....thats exactly what i want....I am having a time trying to find a good BB turbo though....
Click to expand...

heh. yes, but WHAT T04E? that's like saying i own a toyota......yes, but WHICH toyota? a prius or a supra? ;)
 
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MKIIINA

Destroyer of Turbos
Mar 30, 2005
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Plano, TX
siman said:
no no guys...i am DEFINANTLY not sticking with an "upgraded CT"....gosh i thought you would remember my anti 60-1 trim upgrade arguments with Syst a while back hahahahahaha

I am going BB To4E probably.....since it spools quick and has a 500hp max....thats exactly what i want....I am having a time trying to find a good BB turbo though...

anyone have any recommendations on who sells good turbos? Besides SP...
Click to expand...

ebay! lol jk but what would f/c be around do you guys think for an sp61gt?
 
S

suprastanger507mgte

2x88+2x89+1x91+2x92=ME
Apr 5, 2005
3,148
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Hayward , Ca
drjonez said:
FCO is not based on pressure, it's based on FLOW (hence the airflow meter, not boost meter). pressure != flow. that said, FCO will depend greatly on what turbo you have and what other mods you have. personally, my setup used to hit FCO around 11 psi or so on the lex....
Click to expand...

Mine have actually hit at 14 psi with LEx and 550cc injectors, and a few other mods.

I was told to backout the LEX afm screw to counter the boost cut.

Can someone confirm this for me please, since I am still getting a fuel cut...

Thanks.
 
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drjonez

Supramania Contributor
Mar 31, 2005
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the motor city
www.4cefed.com
messing w/the screw in the AFM is merely altering the amount of unmetered air flowing into your engine.....this has the neat of affect of moving FCO up and also making you run more lean. be sure to have proper methods of monitoring A/F, etc. when doing so....
 
p5150

p5150

ASE and FAA A&P Certified
Mar 31, 2005
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Central Idaho
I tuned my 57 trim ct ubgrade to 365rwhp with no screw in the lex before I would hit FCO. Screw the lex, I would just go with the MAFT and a 3" GM sensor. Built in FCD and the ablility to set it up in blow through mode.
 
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malloynx

Member
Mar 30, 2005
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i have hit 19psi with my sp61gt with the lex/550 setup. before i could only hit 15psi. i then backed out the screw all the way and sealed the screw in with FIPG.

A/F's are being watched with my lm-1. i'm going to try 25psi and hope not to hit fuel0-cut..

next month i will be converting to the MAFT. i already got the gm sensor, i just need to order the maft
 
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