tuning S-AFC without dyno?
 

i'm researching getting a SAFC since someone said it would be a good idea instead of a carb. i dont' have a dyno near by and would need to tune it myself. i'm as dumb as a brick when it comes to tuning electronics so i need to know how much of a challenge it would be.

u would need a wideband a/f meter

Doesn't matter which way your tunning to change the air/fuel ratio your motor ingests, you should always be doing it on a dyno with a wideband gas analyser.

But to answer your question, SAFC's are very intuitive and easy to change settings.

Edit: First sentence there is a bit in-coherant.. I ment, it doesn't matter if your tunning a carb or an EFI system, you need to do it on a dyno... yeah that makes a bit more sense.

i really don't have access to a dyno or wideband for as long as i'm sure i would need it. is there anyway i can make sure it is close to accurate? i have an A/F gauge now, but i know they aren't that accurate

you can get a wideband for 350$

Something as simple as an S-AFC should be able to be tuned in an hour or less. Since you're deliberately leaning it out to make more power, you need to be sure the mixtures are still safe. You can't see the effects of that sort of fine-tuning with a narrow-band A/F meter. It's worth driving to a dyno for.

We say to do it on a dyno because most Dyno places will have a Wide band Air/Fuel sensor on loan or use to help get the ratio's set and it's a controlled enviroment.

That and getting your numbers there is fun too.

Once I get my car running I want to take it in and get this done to keep my mind at ease.

could you just buy a wideband and tune it your self? would that work just to get by. because i will be having the same problem.

Well yes and no.

If you get a wideband($300+++) then you can get the A/F's set pretty well in real time.

A dyno can get you on a controlled run so you know RPM and A/F correlation.

It is a lot of money for a wideband though.

Unless your going to have a 400+ HP beast with aftermarket EMS I recommend taking it to a place with one instead f buying one.

I ran an S-AFC on my 88 TII for years with great success and never had it dynoed at a shop. I just used the old but dyno. That's where you play with the settings while driving around. I could actually tell a difference. Maybe my butt is extra sensitive or something... ANyway, you don't HAVE to get it dynoed to run the car. You SHOULD get it dynoed if you want to fully optimize your settings and make sure you don't accidentally frag something. BTW, I had an EGT gauge installed on my car so I could monitor for excessively lean conditions and optimal burn and stuff. It might not have been "spot on" accurate, but it definitely worked.

Good luck!
Mark

:rlaugh: lol

hmmmmmmmmm, whys that FC-Junkie? :D

Could be from 10 years in the military. Though that would tend to wear ones butt out as opposed to making it sensitive...

Mark