Is an safc2 good enough??

[95240s14]

I have a basically stock RB20det. only upgrades are Nismo FPR and FMIC. I scored a killer deal on a new turbo. I am not looking for crazy power yet. so my question is, would a SAFC2 be enough to help tune my car with this new turbo to around 240whp? If not, what would you reccomend.

[wootwoot]

nope. Timing is way more important then fuel control. For that low of a goal I would get my ecu programmed by whoever you like

[sblack13]

I hate mine, I wish I would've got a Power FC. Which i'm gonna do anyways. But it'll be fine if you want that power range.

[95240s14]

As long as base timing is correct, wouldn't my main concern be fuel?? I realize when adding boost, it is best to retard timing a bit, but that should be able to be accomplished via the CAS right??

[harlockssx]

I also started with an SAFC, it was OK, but not really optimal. I kept getting ROM tuned & fine tuning with the SAFC...should have bought the Power FC in the first place, would have been cheaper in the long run & easier to tune. I picked up my Power FC cheap used ($300) and it works great...that's only a bit more than an SAFC...it's what I'd recommend. FYI, there's plenty of guys who've made more than 240 rwhp with the stock RB20 turbo & ECU with just bolt ons...

[wootwoot]

Adjusting timing on a motor is more important to detonation then fuel. You cant play with the timing on an electronic ignition car like that. All you can do is set it base

[moonshinekouki]

do you guys thing a aem ems will be good for a stock rb25 if im going to play around with my boost settings?

SOrry for thread jackin lol

[kuramaya]

Power FC is the best bet.
However, if you are low on cash at the present time, the SAFC II isn't that bad. Especially if you are not going to crazy with power ups. Also the SAFC is good to learn on. I ran one for almost 2 years with no problems. Added a wideband and I tuned it myself which taught me alot. Now running the Power FC, I would never go back to the SAFC II, but for the time and money it was money well spent. Hope this helps.
late
Daryl

[Dousan_PG]

safc2 is good for knock reading
thats....about it.

[steve shadows]

safc2 is good for knock reading
thats....about it.


and the stock knock sensor is good for pretty much nothing...

so you can draw your conclusions from there...

pfc, haltech or tuned rom (specifc for setup and dyno tuned)

[johngriff]

The safc cannot send more fuel out of stock sized injectors. If you put larger injectors in (7mgte/DSM/RB26/GTIR) you can subtract injector signal on the SAFC, which will get you in range of what you need for fueling.

This will not solve your ignition, and more than likely it is going to mess things up pretty badly.

Greddy Emanage Ultimate will probably cut it for that small of an increase in estimated output, though you did not mention the size of the new turbo.

[harlockssx]

PLEASE don't buy the E-manage crap! I don't know of ONE person who's ever gotten it to work correctly, and that includes several reputable tuners...Don't be duped into throwing your money away. It looks good on paper, but doesn't perform as advertised in real life.

[yokotas13]

safc2
SITC

thats what the aussie stagea guys are using with awesome results on the rb25s

and what i will be usingq

[Z U L8R]

johngriff is correct. the stock injectors are only 270cc's...they're the same injectors as a ka24e. Even if you put a GT45 on the car, your injectors will only be able to provide so much fuel before you lean it out and crack a ring land. you'll have a good chance of popping your motor if you go beyond 13-14psi on those 270cc injectors and the stock ceramic turbo definately begins it's self destruct sequence at 13psi. 13psi should put you around 220-230 rwhp. the safc2 will only adjust 50% of what the injector size is. that means if you use an safc2 the biggest injector you can use without getting your ecu tuned is gonna be 405cc's ( side note* remember yours are top fed.) this is why sr20 guys go with 550cc injectors and an safc2. because sr20's come with 370cc injectors and the safc2 will be only able to handle a 555cc injector on that motor UNLESS the ecu is tuned accordingly. so you need to decide (taking the turbo out of consideration since you said you had a better one) in the long run is it better to get an safc2, ecu tune, bigger than 405 cc top fed injectors, and a bigger maf, or is it more cost effective to drive it as is at 12-13psi tops (~220-230hp), until i get bigger injectors, better maf, install my turbo, and then get my ecu tuned for the mods i have, and then later if I really really want/need more adjustability, THEN I can get the safc. personally, i'd lean towards the latter more. a very important question cause you said you got an adjustable fpr, i really hope you're running a walboro 255 fuel pump or something comparible before you turn the boost up.

[95240s14]

yah, I have Walbro 255. I am not thinking i can just bolt on this turbo and crank the boost. The last thing i wanna do is blow my motor. I just know the stock rb20 turbo is crap and i want it gone. I will only be running about the same boost with this new turbo until i get injectors, z32 maf, and some type of engine management. This apexi turbo is internally gated at 8 psi currently. I jwish i could find a used PFC for 300, but all the ones i have seen for sale are $900+

[annie4rb20]

"13psi should put you around 220-230 rwhp"

I have 230rwhp @ 11psi and an 11.5-12:1 AFR. It's not uncommon. I also tuned w/ an SAFC-2. The stock injectors will carry you to about that (230bhp), but I am also running a higher fuel pressure than stock, meaning the injectors are actually at about 300-ish+ cc/min.

Since you're not looking for monstrous amounts of power (yet or ever), and 250atw is actually not a totally unreasonable goal (I would do 370cc injectors from a CA and the JGS Precision resistors that the KA24E people use), and get an SAFC-neo instead (16 fuel correction points instead of 12 like the SAFC-2).

Just remember the piggyback can only carry you to about 350whp before it gets unrully (and that's pushing it). Personally, I think that's enough power for anyone. Let alone a street-driven 240sx.

It's not the best option out there. There are tons of other options. But as a "just for now" kind of thing, to get you to where you want, it'll do.

[gunmetalgtr]

safc isnt going to give you optimal power but it will work ok for that power. just keep in mind the safc corrects the a/f ratio by manipulating the MAF signal wich also manipulates the TIMING. SO if your just going to put that turbo on and add fuel with the safc its also going to pull more timing out thinking its getting more air than it actually is.....id recomend like other people before my post to get a new MAP frm JWT and fine tune with the safc OR power FC...for the money....GOOD LUCK!

[95240s14]

thanks guys.....370cc w/ safc neo sounds like a plan....I will do some homework, thanks again.

[johngriff]

Please Read.

http://www.zilvia.net/f/showthread.php?p=1077578#post1077578

[S14DB]

http://www.aempower.com/ViewCategory.aspx?CategoryID=116

[johngriff]

I wrote them a sponsor request, but have not heard anything back.... :(