13bturbofc

iTrader: (4)

I have a 2nd gen 13b rx-7 turbo-ll, I scrapped the stock engine and bought a brandnew one with 3mm apex seals race ported and everything. Had a custom turbo shop build up the turbo rated for 450+ hp and I replaced just about everything else possible in the engine bay. As you can probally tell I put alot of money into this and dont want to mess the engine up by starting it up un- tuned. I have a S-AFC, its installed and ready to go, the only thing I need is a front mount intercooler. I want to get it running soon so I'm going to need to have sum1 that knows what there doing tune the S-VAFC. It came with instructions however they say that only a person expirenced with s-afcs should tune it.

Are there any reccomended sites that can teach you basics of operating it?

Is there anyone in the Lancaster PA area that knows how to use the safc?

Will it harm my engine if i start it up without tuning it, or is it automatically set to run rich?

Richter12x2

iTrader: (1)

I bought mine used so I'm not sure what they're set at from the factory, but if you turn the car on so the power to the SAFC comes on, you can walk through the tuning and zero it out. (Set the correction to zero at every RPM range) and then it will be the same as not having the SAFC, i.e. running off the stock computer.

What the SAFC does is modify the signal coming from the airflow sensor so that the factory computer will adjust the fuel supplied up or down. It does this based on what you tell it, for low and high throttle (which I set to wide open and not wide open, or 99% is high and 98% and less is low) then based on the correction you set for the rpms, and automatically maps between the points, so if you were to set it at -10% fuel at 1000 and -4% fuel at 1400, then at 1200 it will automatically be at -7% fuel.

You don't necessarily have to have a shop tune it, but it's probably best. If you want to do it yourself you can do it with a wideband o2 sensor, then essentially just make small adjustments until your o2 sensor shows optimal or near optimal no matter what you're doing, as in at all rpms at all throttle positions.

Basically, if your car ran fine without the SAFC, then you can set it to 0% correction and it will run the same way. Setup isn't that hard, once you get used to navigating the screens. Monitor just shows you what the SAFC is seeing, whatever they call number 2 is where you program in your correction, etc.

13bturbofc

iTrader: (4)

thanx for the help.....im running the 720 cc gsl-se injectors for the secondaries and a upgraded turbo so hopefully when i first fire it up it runs a little rich and NOT lean!! what kinda engine mods do u have and where do u have your settings on your safc? i was told u can kinda tune it with a EGT and air fuel gauge is this true?

Richter12x2

iTrader: (1)

I've been running -5% across the board just as a starting point, I'll probably pick up a wideband o2 sensor so I can finetune everything. As far as engine mods, nothing really, I have a cone filter and a 3" exhaust back to dual 2 1/2" after the cat, plus the subzero start removed. Everything else is stock, since porting the engine isn't allowed in the Street Touring classes I race in. I'm not even running bigger injectors yet. But mine runs rich as hell stock. In theory, if your sensors are all in working order, your engine computer will start rich with the bigger injectors (since it's still using the on-time setting from the old ones) and gradually lean it out using the o2 sensor when it sees that it's rich until it's optimal. Basically you can use any gauge that will tell you if you are rich or lean to tune the SAFC, so if it has enough precision and quickness to tell you definitively that you're too rich here and too lean here, then you can use that for tuning.

13bturbofc

iTrader: (4)

ok thanks for all the tips