apexi s-afc on a 944

led · 08-21-2002, 01:31 AM

Does anyone have or know of an apexi s-afc on a 944?

jrkrider · 08-21-2002, 06:39 PM

im not completely sure, but i think 9xauto has somewere a couple of those.

jseel · 08-21-2002, 08:11 PM

911&Porshe world did an article on a 951 with that and the apexi boost controller. they also did a "minor"? chip change, plus a couple other small things. claimed 350 hp-350 ft-lbs

individual · 08-21-2002, 11:50 PM

the apex AFC isnt exactly a car specific device. i have one for my RX-7 turbo and it just wires into your ECU. the place i bought mine from included a specific wiring diagram to help instalation, but really all you need to know is what wires to tap into. if you got a diagram for the 944 ecu then all you need is the instructions for the AFC itself. it tells you the wires you need to tap intos function. one word of warning though, if you do order it, make sure it comes with the english manual, the standard one is all japanese. its a really good and usefull tool to help out in fuel tuning. i love mine. and chicks really dig it, its weird. i always get "whats this cool blue thing?" whenever girls ride in my RX-7. they love it, think its the coolest thing around.

overkill · 08-22-2002, 07:42 AM

What do you guyz think about the AVC-R? Better then a manual? I know manuals have fewer parts so it's less likely to break and,... what else? So is the S-AFC worth it?

led · 08-22-2002, 12:38 PM

A couple of friends of mine have it, but not on a 944. I've tinkered with it and it really is a breeze to set and it really does look c0ol!

Where can I find the wiring diagrams?

individual · 08-22-2002, 01:43 PM

overkill-the AVC-R is the mosy gadget filled boost contoler you can get. it does anything and everything you could possibly imagine. it learns the cars boost curve and programs itself to take advantage of it in the best way. it really is a neat device, and its more accurate than a manual boost controler and is fairly easy to use.. as nifty as it is however, i cant see paying the 450 bucks or so for it. id rather just get a plain old Greddy profec B. its a lot simpler and doesnt have all the features of some of the others, but its the most accurate, reliable boost controler you can buy. and its only 300 bucks new. it works for me.

led-you should be able to get the diagrams off apex's website. i think. i know they have them for my RX-7, but im not sure about the Porsche cars.

overkill · 08-22-2002, 02:08 PM

300 bucks for a manual and you cant hold out and fork up an extra 150 for the fuzzy logic?

individual · 08-22-2002, 02:29 PM

fuzzy logic isnt always a good thing. to allow the b/c to learn the boost curve, it sometimes lets the car overboost a few times. on a car thats tuned to the ragged edge of detonation, this can mean all kinds of bad things. in my situation, my turbo car is an RX-7, the most detonation unfriendly car on the planet. the rotary engine does not tolerate detonation period. one good ping and my engine is dead. so if fuzzy logic could spell the death of my engine, why should i spend 150 extra for it? the profecd b is a great boost controler. if you happened ti read a few months back the issue of sport compact car, they tested all b/c available. the profec b line was up there in the top rankings. it will serve my purposes just fine.

ae1969 · 08-22-2002, 03:07 PM

I read that issue of sport compact it was quite informative.

I can't believe that the ~30 dollar ball bearing style produce similar benefits as those that ran over $300 ...

individual · 08-22-2002, 03:13 PM

yeah the ball-spring type are really good especialy for their cost. i just dont like manuals though. id rather have the ease and consistency of an electronic. the turbo XS manual controler vaires its control from car to car. on my friends Z it was 1 turn:1psi. on my RX-7, it was 1/4 turn:2psi. plus you had to get out of the car to make adjustments and it was generaly just a pain to tune with it. but on these electronic controlers, you turn a knob to desired boost, and it goes there. its that simple. the option of a low and high boost selected by a button is nice too. manuals are a cheap way to control boost, but the electronics are just so much nicer.

led · 08-22-2002, 07:51 PM

I really like electronics but I figure the profec b is enough and is less likely to fail over time

overkill · 08-22-2002, 10:05 PM

Well, for 450 beans I'm sure you can specify a specific boost and not have to worry about overboosting.

marksportcts · marksportcts's Garage

I think the AVC-R is a great unit, and currently serves as my boost gauge. I sold my turbo kit and ordered a SFR SC kit. Don't want to sell the AVC-R as friend of mine made me a fiberglass plate for it under the stereo where the pocket used to sit.

As for the SAFC, Tim at SFR told me that the it wouldn't work well on the 944 cars as our cars use a fuel map based on load, while cars that can properly the SAFC are air flow based. That may also explain why my 944 has never released the BOV revving in neutral while a friend's WRX does. This is what I know about using piggy back fuel computers and their compatability to our cars.

overkill · 08-23-2002, 06:15 AM

Thanks for the info!

jseel · 08-24-2002, 11:40 AM

to wire these things i think you use the toyota diagrams from apexi (along with the porsche factory ones) they use a similar air flow device. got that from 9xauto

individual · 08-24-2002, 05:24 PM

Quote:

Originally posted by overkill
Well, for 450 beans I'm sure you can specify a specific boost and not have to worry about overboosting.

no, you didnt get what i said. fuzzy logic is a name for a program in the boost controler that learns your cars specific boost curves, in other words it figures out how your car makes boost. but in order for the device to learn the boost curves, it has a tendency to let the engine build too much boost, only by about a few pounds or so, but still, its more boost than it should be. you can set it at a specific boost yes, but while its learning the boost pattern, it can sometimes overboost. after the fuzzy logic has figured everything out, its a perfectly good controler. but on my car, overboost is bad,very bad. so im not gonna spend money on something i dont need or want. a profec b will do just fine.

overkill · 08-24-2002, 06:11 PM

That sucks then, A couple of pounds is alot. I don't want to take that chance. I want to be in control of my car. I think I might go for the manual too.

951carter · 08-24-2002, 06:22 PM

What, you don't wanna play overboost roulette?

I just could not bring myself to put some Japanese gadgetry in my finely engineered German auto.

overkill · 08-24-2002, 07:17 PM

Careful dude, you might fire up maachan