need help blind tuning a safc

[((sr)) kelly]

i have NO wideband or narrowband...


i just want the car running so i can drive to the tuning shop....


the car runs sooooooooo rich... what do i do to lean it out with a safc2???

if its tooo much of a danger, i just wont do it

[Unit-121]

well just return the settings back 2 zero and u should be fine one of my homies is running a safc2 in his srt-4 he was so rich he just put the settings back to zero and he was fine u can try that it should help.

[LongGrain]

you just take away fuel, make your correction negative

[((sr)) kelly]

think im going to pull it down 15% across the board...prob needs about 20% taken away....

these are sorta equivalent to 550cc on a sr20det

[xpl2007]

What is your set up mods?

[johngriff]

LOL.

Tow is what $400 MAX.

New engine... ehh at least a $1000...

Hmmmmmmmmmmmmmmmmmmmmmm

[((sr)) kelly]

dude.. i dont plan on dogging the car at all... if it cant get it to run good.. im not driving it and it will be towed..


all i have is 444cc injectors, sard adj fpr...

[johngriff]

pull 35% across the board.

It will still be rich.

Then go street racing.

[((sr)) kelly]

yeh ok... im not a dumbass noob... and i dont street race



debasing people sure is a good way to promote your sales isnt it????


just lost my business!

[johngriff]

Not really debasing you.

All i see is the red square. :-/

Belive me -35% will still be rich.

[((sr)) kelly]

thats form dick heads that have nothing esle better to do...


look at all my post... non are worth a neg rep




and sorry... i thought that you were trying to tell me to lean it out and then race it...

[smurfgcr]

and why cant you just tow it to a shop?

[johngriff]

Street racing thing is a joke, back in the day I use to watch kids ALL THE TIME, tune their AFC's until it "felt good", at the street races.

That probably plays a big part in all my trash talking the afc, because I have vivid memories of the sillyness that ensued.

[((sr)) kelly]

well we are going to have to tow it i think... it runs like CRAPPPPPPPP


its useless to do anything without a wideband

[johngriff]

did you change the afm?

have you dropped the base Fuel Pressure down?

[Z U L8R]

probably the same thing as my friend's sr20 i'm driving around at the moment. i just took to get it tuned for him. he's bone stock sr20 with an ebay gt28/71r that wouldn't even rev passed 3000 without popping. it's basically set at 0 all the way to about 2k then it goes to -7% , then -10% around 3.4, then -14% at 4k . you should be able to get to your tuner without going passed 4,000rpm, if you wanna take out even less fuel you can, his a/f are 12.0 across the map once it's making boost. hope that helped.

i think he's running an automatic sr /w a 5speed cause the tps has 6 wires on it, and that thing was running so rich you couldn't even get passed 3k, now it's good though

in all honesty man, 550's are only 50% bigger than stock, it shouldn't run THAT BAD. i drove my rb25 /w 550's to my tuner, it shot flames at 4k and only made 190/[email protected] but that soon changed :D

[((sr)) kelly]

we put the low impeadance 444cc in it

[johngriff]

use drop resistors?

[xpl2007]

550cc are not 50 over stock 50 over stock 370cc are 740cc...

Leave it all at 0 and i bet you its rich!! Just dont boost...

[((sr)) kelly]

yeh I used a dropping resistor.... without them... the voltage wouldnt drop on the injectors to open them

[johngriff]

mmmm.

No the injectors would work, they would just burn up quickly.

550's are 50% more fuel than stock.

To figure this out, take your new injector size and divide it by your old injector size.

Everything over 1 is the percentage of increase.

444cc = 20%
555cc = 50%
740cc = 100%
1400cc = OVER 9000!!!!

[xpl2007]

:eek3::wtf: I dont get it then whats this:: (ka)


INJECTOR SIZING EQUATION MADE BY ME, COVERTPOLARBEAR

To determine the flow correction injector percentage,

(OEM injectors/new injectors=X ::: 1-X=Y :: move decimal 2 over, and thats your percent.)

(270/370=.73 ::: 1-.73=.27 ::: 27%)
(270/440=.61 ::: 1-.61=.39 ::: 39%)
(270/500=.54 ::: 1-.54=.45 ::: 45%)
(270/550=.49 ::: 1-.49=.51 ::: 51%)

Engine fuel pressure at stock is 34 psi with vaccum hose connected
Engine fuel pressure at stock is 43 psi with vaccum hose disconnceted.

vietdood wrote:</SPAN>Covertpolarbear wrote:INJECTOR SIZING EQUATION MADE BY ME, COVERTPOLARBEAR

does this mean safc2 can only handle 550cc injectors max?

SAFC can only correct for + or - 50% of stock injector size. Example: SR20 comes with 370cc stock so the max for that motor is 740cc.

The safc can only correct up to 50%. This means that the max injector you could have would be double your stock injector. 270X2=540cc close to 550 this means where you need to pull alot of fuel like at idle you might be running a little rich. While a SR has 370s stock. 370X2=740cc


If you have (sr)
370/550 -1.0= 32%
370/650 -1.0= 43%
370/740 -1.0= 50% thought this was max for the wunderfull SAFC II
But i do my math and 555cc is 50% more then 370. 370ccx50%=555
My car runs great with 650cc of course i turned down the fuel to match 550-555cc. My lows are -2 all the way and highs are -16 with are like me have the 550-555cc. Im going to do another test and see how my settings go untill you tell me about the greddy i asked you if it was a good deal to get our your laptop deal let me know thanks John...
CONFUSED!!!:faint:

[xpl2007]

Just talked to Deatschwerks and they said nismo 550 injectors run at 615.. Most JDM ECUs run for nismo injectors.. I am a hair dead on on my psi at 40 making my 650 injectors 617cc.. Just for your guys info..

[xpl2007]

Hello? Anyone. Which is right??

[xpl2007]

Guess so!
Was right!

[titoray]

XPL your right!