von

Ok. I know everyone would say every 7 is difference and I need to get my own settings but I want to know your S-AFC settings for N/A cars only and ones with lots of mods. Yes Bambam if your still alive , even your settings. Im going to get a general idea of were I can set my car at. I have MZSP7 mods except for short fb Tranny. This is NOT my daily driver 7 so Im looking for some easy hp without dyno tuning. Now I have seen N/As run more than -13% fuel reduction across the board on stock fuel system.

Thnx alot

darkwaveboi

-13%??
Damn, i believe it

Scott 89t2

you have to be carefull across series too. the ECU's react way different to mods. the 86-88 lean out and the 89-91 richen up with mods. so don't either bother looking at poeples #'s with a different series.

pd_day

iTrader: (6)

I have cone intake, cold air box, RB turbo back.
SAFC setting

1000(0)
2000(-3)
3000(-9)
4000(-14)
5000(-12)
6000(-9)
7000(-11)
8000(-8)

Low = 40%
High = 80%

Best power comes from 6000 - 8300 RPM
Max AFL = 55.9%

1990 GXL

Scott 89t2

pd_day

iTrader: (6)

Ya...hehe...
I got a Full Racing Beat Turbo back CHEAP....~350 CDN...
So I had a custom front pipe made that connects the exhaust manifold to the presilencer and just use the rest of the system

von

PD-DAY ! thnx alot that helps. Although I would like the low settings as well. I have a 89GXL series 5 so it does run really rich believe me. I see 14% at the most but I have lots more mods so I will probly do a tad more each RPM. Also whats your low settings? Thnx a billion especialy for the AF% because I wanted to compare that to my Ported manifolds. I will get back with my results during this weekend.

Anyone else?

von

My mods are.

Mild to Agressive ported manifolds
Pineapple sleeves (cut shaved and J/B welded in)
Custom short intake / cold air box and ram air coming this weekend
Streight pipe bonez exaust and cat back (billit)
200lb weight reduction No A/C or P/S Alum T11 hood
E-Fan (Black Magic)
Wires
Bonez Clutch
Drag radials
TB mod and rerouted coolant line.
S-AFC

Future mods are ported TB tune my S-AFC and MZSP7 TRANZ , timing advance and MSD&Coil, gauges , seat , flywheel and low 14s.

silverrotor

iTrader: (1)

I have yet to dyno my ride with the S-AFC b'c I haven't received It yet. Will be here by the end of the week. If thread Is still alive, I'll be glad to post my results.

pd_day

iTrader: (6)

By the way, I have my timing advanced too...

I didn't set my low settings. I was fiddling with it one day and made my car sound like a helicopter, got scared and I stayed away from it.

pp13bnos

iTrader: (1)

1k +6% (Idles a bit smoother)
2k -12%
3k -20%
4k -24%
5k -16%
6k -24%
7k -27%
8k -26%

I had a 10-1 a/f ration without the s-afc. Use at your own risk. CJ

von

PP13bnos? Thnx alot. Your profile doesent mention wich car its for. Don you have a S4 N/A with a mild street port? I think I would be able to use your settings but backed off around 6 points because I dont have a street port. Plus I have much greater A/F ratio to begin with because its a S5 car and the fuel burns my eyes.
Also PP13Bnos? whats your A/F% readings? and 40%low 80% high?
Silver Rotor? I will try and keep this thread alive until I post my findings as well so please type back when you get some. thnx everyone

slvr7

iTrader: (1)

'86 GXL, with cone intake, RB header, hi-flo cat, Trust cat back. Also MSD 6A box, and working 6th ports off the ACV relief hose.

Dynoed at 146 rwhp @ 7000 / 119 ft.lbs. @ 5600 rpm.
RPM / S-AFC correction / A/F ratio:

1500 0%
2500 0%
3500 -5% 14:1
4500 -5% 14.5:1
5000 -5% 14.2:1
5500 -10% 14.5:1
6500 -10 % 14:1
7500 -10% 13.5:1

Max airflow (from S-AFC): 63%

Curtis
'86GXL autox'r

eViLRotor

iTrader: (2)

Wow, is it safe to run NA's at/near STOICH throughout the entire powerband!!!!

Any TII would have go booooooooom, lol

von

Whats stoich and how much farther can a rotory go? 15:1 / 16:1 ??? I would also like to know about running stoich throught the powerband? thnx forum

pp13bnos

iTrader: (1)

This was for my 2nd gen. I made most power at 14.25-1 a/f ratio. I was seeing 54% on the dyno, and no i see a max of 61% or so. CJ

silverrotor

iTrader: (1)

Interesting. Those are the most significant reductions I have ever seen on a n/a. Your fuel economy Is probably comparible to that of a Honda Civic now I bet.

pd_day

iTrader: (6)

My SAFC alf screen if you are interested

https://www.rx7club.com/forum/showth...threadid=92782

pp13bnos

iTrader: (1)

If i drive freeway with a less than a half a dozen first through 3rd gear 8.5k rpms runs, I usually get around 27mpg. I think that if i left my foot out of it for the entire tank of fuel, drove nothing but freeway, and shifted before 4k....I bet i could get 30mpg. CJ

von

Thats F-in awsome. I dont think I will be going that low , although Good to know my engine can handle it.

PPNOS or anyone? How do I know when Im at 14-1 a/f ratio without a dyno? If I hook up the blue wire to oxygen sensor what % readings should I see for that A/F ratio ?

Cheers!

u will never know how low you can go wihtout a wide band o2 sensor

von

Ok I installed my S-AFC but didnt tune it. I saw a 50.7% A/F ratio. I hope to gain 10points by tuning but I dont know. That would put me up to PPnos and he has a street port. We will see.

Also My sensor readings are In-1 3.8v in-2 .02v In-3 8.9v
Can somone tell me if these are to spec? thnx

pd_day

iTrader: (6)

The first reading is AFM voltage
2nd is O2 if you connect itto that
3rd is TPS

2nd and 3rd seems off

von

Excuse me. I meant 3.9 for TPS and like .02 or something for oxy wich isnt conected. It fluctuates a little. Actually all of them do. Are these readings ok?

von

Also im thinking that the A/F % is not directly related to how much power your car makes. You can have more % air flow but make less power than a car the other way around.