i was thinking of getting a SAFC but i just wanted some ideas on other things that can do the same thing. and what ones are the best and which ones are the worst. just so i dont regret spending money on the SAFC later.

 

Just pick up a used SAFC from someone on the forum. Then you can have the quality and a good price.

But the correct answer would be to go full stand alone like a Haltech, Wolf, or Microtech. It also depends on what mods you have done and what your goals are for the car.

Zach

 

its a s4 with a s5 turbo and for now i just want to get the car driving around with a little more hp then stock. im getting a Rtek and the only reason im looking for a SAFC is becuase all i have is 4 770cc injectors and the rtek is programed for 720cc injectors. some one wana trade?

 

PM Karack, he has an RTek 1.7 chipped S4 ECU and an SAFC for sale together for like $250 or something. It might be a little less than that but I can't remember for sure. That sounds like exactly what you are wanting.

Zach

 

that sucks because i just sent out the ecu to get chipped, you think he would want to sell that SAFC alone?

 

well acutally... buying that would be cheaper then a new SAFC and i could just sell on e of the ecus again for the cost of the Rtek... meh i hope he still has em for sale.

 

He still has them for sale. He just posted it up yesterday or today.

 

cool thanks man. but as far as piggy backs go the SAFC is the only one worth looken at?

 

I would recommend a standalone period. Piggybacking requires having to splice into the factory ecu. If you're not great at soldering those wires, you may end up with cpu readings that are a little off due to the difference in resistance in your soldered connections.

In an overlysimplified example, the oxygen sensor measures voltage of expelled gasses. This voltage decreases over poor electrical connections, so you get a "slightly off" sensor reading. Apply this thought to your boost sensor, et cetera, and you get my point. Then if you want to add a boost controller, be prepared for splice on top of splice.

Piggyback units are an inexpensive way to help manage an evolving car, and they do operate as intended. I would still recommend saving for a standalone for the best possible engine management. It is an RX7 after all. It's worth it for this car.

-Josh

93 FD3S Touring MT
Apexi Power FC
Efini downpipe
Greddy Airinix
Greddy Evo2
HKS bov
Koyo radiator
Magnacore wires
NGK 9 plugs
TEIN Type Flex

 

The Apexi S-AFC is the only one I would even consider for someone who really just wants to piggyback. the interface is similar to my Power FC, which is logical without having too many buttons.

If you decide to get it, it's best to have the car tuned by a proven quality shop or an Apexi tuner upon installation, especially if you've remapped the stock ecu.


-Josh

 

yea im not worried about the solder connections, im postive i can solder them in with little to no resistance added. and when i go for a larger turbo i will also go for a standalone. i dont think a stock s5 turbo warents a stand alone though.

ps i can spell