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Location:
sunny coast, qld
Registered:
October 2002
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advantages of apexi S -AFC?
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Mon, 19 January 2004 02:49
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1jz running 14psi, with aftermarket intercooler, 3" exhaust, twin dumps and cold air induction, stock injectors but bigger fuel pump. Is there any need to get a S-AFC to tune the air/fuel ratio or would it be alright running stock computer?
Does anyone know if the S-AFC has any boost cut or speed cut capabilities?
thanks
Chris
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Location:
Wollongong
Registered:
May 2002
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Re: advantages of apexi S -AFC?
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Mon, 19 January 2004 04:47
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The Toyota 1JZ ECU runs obscenely rich at high rpms (mine dips down into the 9:1 air/fuel ratio). A SAFC will help a lot, not only for better fuel economy, but bringing the ratios back to around 12.5:1 will increase power a lot also.
The SAFC does not have any boost or speed cut defenders built in.
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Location:
Perth
Registered:
October 2002
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Re: advantages of apexi S -AFC?
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Mon, 19 January 2004 05:19
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Nor does it allow you to alter timing - which some of the high-end interceptors do (eg Emanage). Still, it is a cheap way to get some extra power (leaning out mixtures), especially if you have no intention of going aftermarket ECU at a later date.
Justin
JZA61
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Location:
sunny coast, qld
Registered:
October 2002
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Location:
Wollongong
Registered:
May 2002
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Re: advantages of apexi S -AFC?
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Mon, 19 January 2004 06:26
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Using NO2 on a 1JZ with stock turbos is "bad thing". The ceramic turbines will not hold up to the task and you'll be shopping for new ones quicker than it takes you do a 1/4 mile run 
I've heard that running nitrous is equivalent to doubling boost pressure, and I know the factory turbos won't hold up to 28psi.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: advantages of apexi S -AFC?
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Mon, 19 January 2004 06:27
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thanks mate.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: advantages of apexi S -AFC?
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Mon, 19 January 2004 06:32
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the problem is actually that the stock wastegates are crappy and small.
if you want to put nitrous thru it, you'll need a nice big external wastegate, which means you might as well get a nice big aftermarket turbo or 2
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Location:
sunny coast, qld
Registered:
October 2002
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Re: advantages of apexi S -AFC?
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Thu, 29 April 2004 02:08
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Is the tuning of the S-AFC limited to the scope of the MAP sensor?
Ie. you have a FCD that tells the MAP sensor that you are running 14.7psi, you are actually running 17psi. Can you tune the S-AFC up to 17psi? (hypothetical question)
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Location:
sunny coast, qld
Registered:
October 2002
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Re: advantages of apexi S -AFC?
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Thu, 29 April 2004 10:30
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| Chris Davey wrote on Thu, 29 April 2004 12:08 |
Is the tuning of the S-AFC limited to the scope of the MAP sensor?
Ie. you have a FCD that tells the MAP sensor that you are running 14.7psi, you are actually running 17psi. Can you tune the S-AFC up to 17psi? (hypothetical question)
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anyone?
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Location:
sydney
Registered:
March 2003
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Re: advantages of apexi S -AFC?
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Thu, 29 April 2004 10:46
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what is price of safc
if yr gettin close to 800 or 1000 bucks fitted
u mihgt aswell go for aftermarket ecu
u should be able to get a microtech supplied fitted and tuned for around 1800
safc are good idea but i think they are expensive for what they do when u compare them to an aftermarket ecu
i think its best to save abit more and get a full programable ecu
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Location:
sunny coast, qld
Registered:
October 2002
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Re: advantages of apexi S -AFC?
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Thu, 29 April 2004 12:51
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i have found them for around $450 new.
I have a friend who can install it.
I got some prices for a new ECU and it was about $1900 for an ECU without installation or tuning.
what model microtech are you talking about? I thought the LTX12 was the go for the 1jz and they aren't real cheap 
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Location:
sydney
Registered:
March 2003
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Re: advantages of apexi S -AFC?
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Thu, 29 April 2004 12:54
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oh yer sorry forgot u need lt12 microtech for 1j
450 new seems good
theyre very easy to wire up
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Location:
Auckland, NZ
Registered:
April 2004
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Re: advantages of apexi S -AFC?
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Tue, 04 May 2004 08:22
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Are there specific S-AFC's for different models/engines, or a one size fits all custom wire in type thing? I thinking about buying one second hand to stop the filthy black shit all over the back end of my Soarer now that I've slightly boosted my 1G...
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Location:
sydney
Registered:
March 2003
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Re: advantages of apexi S -AFC?
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Tue, 04 May 2004 08:38
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yes there is diff ones
some airflows go form 1 to 5 volts
others from 5 to 1 volts as u accelerate
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Location:
Sydney
Registered:
May 2002
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Re: advantages of apexi S -AFC?
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Tue, 04 May 2004 09:10
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i use one in my 1J and it works very well...along with leaning out the mixtures it kinda acts as a FCD don't ask how...something to do with the maps...i've taken mine to 1.2 bar im told you can go more but well i've got stocky turbos...
i'm taking mine out as i'm going for more power so yeah...its for sale in the for sale section
if you install one let me know i'll give you some pointer's
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