What's a better route?

I've currently got an S-AFC, but it looks like the rtek7 v 1.7 is a way to go.
I've got 720CC injectors, 3" exhaust, intake, etc.

It looks to me like the rtek7 is a better way to manage things, what does everyone else think?
I'm not planning on upgrading under the hood further, the car's performance is more than enough.

 

tunning

all I have to say

 

^^^ not quite sure what you are saying but yeah I would get the 1.7 if I where you because its not only for the 720cc fuel map but also for timing and other good mods. I would keep the safc if I where you just incase you want to fine tune it.

 

i'm saying that the S-afc is more dynamic than a "chip"

 

i have to agree with santiago on this one

 

but the chip also controls timing and has proper fuel maps for 720CC injectors, and supports higher boost right IN the chip, right?

 

according to a very reputable tuner by the name of DL MOTORSPORTS, the s-afc is not all that dynamic. it is good though.

but if your are not planning to do that much more then the chip IS the way to go.
i would still keep the s-afc just incase you decide to mod farther then the chips parameters.




just so you know DL MOTORSPORTS has tuned many rx7's and 3 rotors.

 

compared to a single state chip an S-afc is light years ahead in the dynamic department with injector control

 

what? how?

the S-AFC doesn't even talk to your injectors, how does it control them?

All it does is look at the RPM and adjust the MAF signal according to what you have told it.

 

Yea the SAFC basically fools the ecu. It cannot adjust timing due to increased boost like the rtek. I would say the rtek is better for you. If you want to fine tune further then get an safc or another piggy back.

 

Actually with the SAFC you get opposite the desired impact on timing. Because you are fooling the ECU by sending it a lower airflow signal, the ECU in turn advances the timing thinking it is operating at a lower horsepower (airflow). And the bigger injectors you use, the more the airflow signal is reduced, and the more the timing is advanced. This is a well know side effect of using a SAFC, and it is one huge advantage for the Rtek 1.7.

 

im just waiting for a s5 chip (whenver that happens)

trust me the s-afcll is the ghetto way of doing it.

why fool the ecu, when you can use the ecu have such a factory feel and safety.

with your set-up, its the safer way to go.

 

I'd say get both. And yes the AFC does alter your injectors pulse width so it does control them.

 

I just don't see how the S-AFC is better at controlling the injectors than the ecu when the safc DOESN'T control the injectors, all it does is adjust the airflow signal! that's the only wire that it modifies.

 

maybe if enough people ask what the a/f #'s are for the rtek 1.7 we might know for sure however I have yet to get an answer stating what the numbers are. He said he had to contact hinreck to get the answer but that was while ago. Does anyone have this answer?

 

They would work better in conjunction with each other, but to say one is better than the other would be right b/c they're not intended for the same thing. rtek 1.7 would make it easier to add 720's but if you had any extra mods done you would still need something that would be able to acount for that.
the rtek 1.7 is made for a stock setup with the addition of 720 secondaries not much more. I think i read with the stock turbo you can increase 12 psi safely, but don't quote me on that.

 

hondahater--go ahead and ask to get the straight poop.

My guess is that they set up the fuel injection to provide the same fuel as you had with the 550s. So the AFR shouldn't change by going to the Rtek 1.7 with 720s. Basically you get the stock fuel map with 720s (except for the low end part at 3500 rpm). Best feature is the timing doesn't get artifically advanced and for boost higher than 9 psi the timing gets retarded--just as it should. The other advantage is you can run more fuel at the top end--i.e. it will take more airflow to max out the 720s--so if your engine can support it you can get more horsepower at the top end.

With that said, I don't think the chip alone will give you any horsepower. At least I haven't seen them advertise it.

 

that would make sense! does anyone know the stock a/f #'s on a tII I'm going to have to use the safc in conjuction with the chip because I've got an upgraded turbo so yes the chip is good but it is nice to have both safc and chip like rex said

 

I don't want to gain HP (well that wouldn't be bad! but that's not the idea), I just want something closer to OEM to control the injectors on my car.

Maybe I'll email rtek and ask them if their chip will do what I want.

 

yes it will if you have 720's and want a stock fuel map for the 720's instead of 550's then that is exactly what the rtek does.