S afc=HP gains as well as?
Passenger
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S afc=HP gains as well as?
I have a RB turbo back and K&N cone and fcd in my 89T2 and in 2 weeks am getting my S afc, for 300$! from dynamic turbo!(by the way). Any way i know I need it to not lean out but should I expect any HP gains aside from the fact that I can then go all the way into boost? And also when tuning safc with my AF guage how do I know(Im a rookie) when to up or down the fuel if my leds are just bouncing from side to side? Generally speaking is it hard to tune? I dont want to **** up and think its set, go into boost and BOOM!
Passenger
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Really! I have been mislead! The fuel pump is MORE important than the afc? I thought it too was necessary but the safc should come first, but that is infact not correct huh? Once I get an upgraded pump in it can I go into boost. I have had it for only 2 weeks and have never in my life gone into boost-I am anxious. Will the pump w/ out afc flood me out or run it really rich? Which pump is best for a tight budget, and how much$? Sorry to bombard you w/ Q's Ted but I SOO appreciatte the input from you
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From: n
The problem with running such an open exhaust is...
1) boost creep with early 1986-1988 Zenki Turbo II's due to too small a wastegate
2) not enough voltage to the fuel pump during high current demand conditions at night (i.e. headlights, A/C, stereo, etc.)
This basically means the fuel pump cannot support the fuel delivery needed.  A S-AFC is not going to do anything because 1) you're maxxing out fuel injector pulsewidths over 14psi, and 2) opening the fuel injectors more doesn't give you more fuel if the stock fuel pump is not giving you any!
Seriously, the upgrade fuel pump (and possible rewire) is a more important step than the S-AFC...
-Ted
------------------
Ted Koseki
Technical Advisor
http://www.k2rd.com/
1) boost creep with early 1986-1988 Zenki Turbo II's due to too small a wastegate
2) not enough voltage to the fuel pump during high current demand conditions at night (i.e. headlights, A/C, stereo, etc.)
This basically means the fuel pump cannot support the fuel delivery needed.  A S-AFC is not going to do anything because 1) you're maxxing out fuel injector pulsewidths over 14psi, and 2) opening the fuel injectors more doesn't give you more fuel if the stock fuel pump is not giving you any!
Seriously, the upgrade fuel pump (and possible rewire) is a more important step than the S-AFC...
-Ted
------------------
Ted Koseki
Technical Advisor
http://www.k2rd.com/
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From: n
Yep, that upgrade fuel pump can easily support up to 300hp to the wheels.  Due to the fuel system design, it will also inject more fuel across the entire RPM band.  This will let you possibly LOWER the settings with your S-AFC - the PROPER way of doing things.
-Ted
------------------
Ted Koseki
Technical Advisor
http://www.k2rd.com/
-Ted
------------------
Ted Koseki
Technical Advisor
http://www.k2rd.com/
Speed from skill
Joined: Feb 2001
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From: San Diego, CA
Originally posted by RX-7 GT
you guys bringing up all these old RETed topics makes me miss the guy. we need him back!
you guys bringing up all these old RETed topics makes me miss the guy. we need him back!
Rotary Freak
Joined: Feb 2001
Posts: 2,149
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From: Okinawa, Japan
The K2RD.com says Ted has moved onto other stuff, but I really think he was done in by carpal tunnel(sp?) with all the typing he used to do on this forum. 
jerk_racer@hotmail.com
jerk_racer@hotmail.com
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