>Xtreme,
>
>How can you say that an SAFC isn't what we need on
>turbosystems? It's a very versatile instrument that is
>practically required to run our car's system with any
>increase in injector size, our computer alone can't do that
>well enough.


actually, it can. if you control the fuel pressure properly, you can get "very" close in the ball park with extremely large injectors. I think xtreme is trying to say that relyin on an afc on a 1 bar map sensor equiped car adds it's share of problems with every advantage. sure you can reduce injector pulse with, but when you do, the ecu senses less load, and increases timing accordingly, sometimes as high as 30 degrees advance at WIDE OPEN THROTTLE. that is too much ignition timing for "any" turbocharged car. then with the afc, you have to buy something to piggyback on the ecu to correct the timing issue. it just turns into another problem after a while instead of a solution. if it is used to "fine tune", it is a very good tool (i.e. no more than 10 % in either direction).

I
>think using an SAFC is not only the smart thing to do, it's
>the safe thing to do.

it is only safe if it is used knowing 'all the other parameters' involved in the corrections. if it is used blindly, it can be "quite destructive"

My 300ZX TT
>friends say it is a must on their cars once they are using
>the huge Nismo injectors.

I agree. on factory turbocharged cars, the AFC can be a fery useful tool I use one on my dodge stealth, and it runs 12.60's with the help of the afc and larger injectors. the 300ZX uses a mass air-flow sensor which is "not" normally maxed out at wide open throttle. leaning out a car wiht some type of mass air flow meter is relatively harmless, and does not cause as many headaches as 1 bar map sensor cars (like our cars, or hondas, etc.). leaning out systems like this will also increase ignition timing advance, but on the same sence, these vehicles usu. don't need much adjustment with large injectors, as the factory injectors are usu. fairly decently sized from the factory. Guess what people do to control the extra timing 'though...............dump more fuel . that's how Dynamic racing ran a 10.8 with thier dodge stealth. mas air flow sensor conversion and correction with 720 cc injectors...........at lower boost, there is QUITE a good deal too much timing, but running 10.80's makes teh timing just right. usu. people that hav elarger injectors run higher boost which flows more air wich brings the "corrected" air-flow count closer to what it would be from the factory at wot on a boosted car. most of those guys also usu. don't go around boosting low either and if they do, they hav eenough fuel at partial throttle to handle it......or they buy new pistons as well. that's the way it works with my stealth


Also, how on earth do you figure the SAFC is useful
>for the NA boys? I know we have a rich spot in rpm, but what
>are you going to pull by leaning that out a little bit?
>Definitely no more than 10 hp and you'd be lucky as hell to
>get even that much. The NA cars are not going to make
>disgusting power, I would love to see an NA with no N20 make
>more than 200 hp and break into the 14's.

well, to each their own. some guys go balistic over 5 hp gains. true, a s-afc won't make 30 hp difference on a n/a eclipse, but it will make relatively the same percentage of gain hp wise as it would on a turbocharged car. it's just the power comes in a smaller package



A.D.P.
"...If you do too much, people become dependant. If you do to little, people loose hope. If you do it right, people won't be sure you've done anything at all."
bring it on............

A.D.P.
"...If you do too much, people become dependant. If you do to little, people loose hope. If you do it right, people won't be sure you've done anything at all."
bring it on...........