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Old 05-20-2004, 10:19 AM   #1
AngryBlueRS
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Default APEXi S-AFC on a NA 2.5

Greets all,

I know this probably belongs in NA, but I wanted to try local first.

Has anyone installed the APEXi S-AFC on a 2.5 motor? Any numbers on the performance difference? I've already opened the intake and exhaust so I'm looking for the next bump.

Also, anyone sell and install them locally? I could probably do it myself, but then again I could probably screw it up pretty bad as well.

Thanks in advance,
Chris
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Old 05-20-2004, 10:46 AM   #2
JGard
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I had one on my old RS. Honestly, I didn't notice any change.
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Old 05-20-2004, 11:29 AM   #3
lucidmatrix
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less than 5lb/tq, 5hp i'd guess..
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Old 05-20-2004, 11:31 AM   #4
Mumbles
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Quote:
Honestly, I didn't notice any change.
That's because it knew you were going to become a traitor!
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Old 05-20-2004, 11:44 AM   #5
Thug
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Probably wont help HP or tq much, but you may be able to get your mpg up closer to stock.
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Old 05-20-2004, 05:25 PM   #6
AngryBlueRS
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Thanks for the great feedback everyone! Guess I'll save the $350 and invest it something else. Maybe muffler bearings.

Chris
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Old 05-20-2004, 08:23 PM   #7
Longshot
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I won't post my dyno results again cause I'm lazy. I gained 5hp and 10lb/ft torque from a quick tune of my AFC back in the day. It did make difference.
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Old 05-20-2004, 08:35 PM   #8
AngryBlueRS
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Quote:
Originally posted by Longshot
I won't post my dyno results again cause I'm lazy. I gained 5hp and 10lb/ft torque from a quick tune of my AFC back in the day. It did make difference.
Any intake and exhaust mods to really leverage it?

Thanks,
Chris
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Old 05-20-2004, 09:44 PM   #9
Darshu
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It does make a difference, Chris. If you can get to a dyno and run 91+ octane you'll be able to manage what Korey mentioned. Also, I happen to have one I'll give you a good deal on (it used to be Koreys! Proven results! )
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Old 05-21-2004, 12:19 AM   #10
Longshot
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Yeah I had a COBB intake and Brullen exhaust on before I went to the Dyno.. I made more power than a stock RS before tuning, and then gained the 5hp and 10lb/ft beyond that.

I bet if I had more time to tune I could have eeked out more, and if I had any way to advance timing I could have gone further. The AFC is hella easy to tune, and I can give you my settings and dyno graphs if you'd like.


Korey
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Old 05-21-2004, 07:21 AM   #11
iamrazor
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Quote:
Originally posted by AngryBlueRS
Thanks for the great feedback everyone! Guess I'll save the $350 and invest it something else. Maybe muffler bearings.

Chris
also replace your giglin' pin.
thats good for an extra 15HP
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Old 05-21-2004, 07:54 AM   #12
BrysImpreza
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I gained 6HP and 10 ft/lbs after a dyno tune with a 2.2 liter NA motor

I had an intake and exhaust though.

Bry.
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Old 05-21-2004, 07:58 AM   #13
Hitokiri
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I was messing around with my Greddy Emanage yesterday with airdlow in preparation for turbo. I can definitely say that the AFCish capabilities it had made a differance. Obviously to more mods you have screwing up your fuel curve, the more correcting it with the AFC will help. I think people with the more agressinve intakes would get the most out of it due to need for more fue. I have been actually removing a little fuel with mine for gains.

Todd
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Old 05-21-2004, 08:05 AM   #14
JGard
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Quote:
Originally posted by Hitokiri
I was messing around with my Greddy Emanage yesterday with airdlow in preparation for turbo. I can definitely say that the AFCish capabilities it had made a differance. Obviously to more mods you have screwing up your fuel curve, the more correcting it with the AFC will help. I think people with the more agressinve intakes would get the most out of it due to need for more fue. I have been actually removing a little fuel with mine for gains.

Todd
not to hijack, but did the obd scanner work for you?
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Old 05-21-2004, 09:34 AM   #15
AngryBlueRS
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Cool feedback everyone, thanks!

I PMed Darshu on the unit he has for sale. Even if the gains are not over the top, it would be cool to have the unit just to be able to monitor intake pressure, mixture and the like.

As for mods, I'm running:
Injen CAI
Borla headers & CAT back
Random Tech CAT

One last question if I can be so bold. I have a Torque2 piggyback ECU in the car. Should I yank this before installing the S-AFC? Installing the chip didn't seem to boost HP or TQ but it did seem to make the engine rev quicker (lower 1/4 ETs). I would like to keep it if I can but don't want to screw up the AFC.

Thanks!
Chris
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Old 05-21-2004, 10:07 AM   #16
BrysImpreza
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You should be ok, the only thing the S-AFC does is modify your fuel map. Unless the ECU modifies the TPS or MAF / MAP (depending on MY) , you should be ok.

Bry.
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