I plan on adding a turbo to my 93 240sx, is there any tuning I can due to the stock ecu, or any engine tuning?

Question

I plan on adding a turbo (7psi) to my 93 240sx, is there any tuning I can due to the stock ecu, or any tuning I can do to the engine to optimize performance. I have an aem air intake, hks exhaust, dc sport headers, hot wires spark plug wires, and ngk spark plugs. I do plan on changing my ecu in the future and engine rebuild and fuel system upgrades so I can up my boost, but is there tuning I can do to the car in almost stock form? Thanks Much!

Answer 1

You could probably get away with a SAFC for tuning but you may or may not need to upgrade your fuel system.

Answer 2

Instead of buying a kit or giving your car to a shop, your real best bet would be to learn how and do it yourself. There are only a couple kits for the KA out there and one of them is garbage. You would be better off piecing together your own kit by waiting for deals in the for-sale sections of the forums.



Visit KA-T.org and read everything, especially the stickies.



If you plan on eventually rebuilding and turning up the boost, you might as well start buying parts that will get you towards that goal instead of your 7psi goal. Obviously, the turbo you get at first will be a small one as will the injectors. Almost everything else though, should be bought with your final setup in mind.

With that in mind, you should really look into an ECU that does everything a stand alone can do at under half the price. Calum or Nistune are both great options. These two ECU types utilize your stock ECU by adding a daughterboard that will enable real time tuning among other things. Best part is it will only cost ~$500 vs. $1200+ for an AEM standalone.

SAFC is a terrible option IMO because you cant control timing. It works by modifying the signals from the various sensors and 'tricking' your ECU into adding more fuel. Because the ECU sees more air entering it adds more fuel, but it also advances timing which is not good for a forced induction engine.

ROM tunes are ok at best. There are many with problems, but there are also many that work.



Visit the forum I mentioned above and start from there. That site has everything you need to know.



Good luck

Answer 3

you may get a Civic or Integra ecu (Prelude and Accord ECUs can't be chipped), have it chipped and run some style of o.e.m tuning utility like Chrome or Hondata. each engine setup would be distinctive, so this is going to choose tuned. No chip or music you get on the internet would be everywhere close to appropriate. I equipped my motor for my Civic and am tuning it myself. a number of my associates have had changed Hondas. you may get it tuned, especially with compelled induction. in case you run lean for basically slightly too long, you would be changing the motor.

Answer 4

you cannot just bolt on a turbo.. when You compress the intake air, the ecu has to be re-tuned for that boost because the sensors are looking for a completely different pressure.. you also have to lower the Temperature range of your spark plugs, and increase your fuel injectors to get the right mixture.. your very best bet, is to get a kit, or refer to someone or shop that really knows how to do this.. otherwise you will blow the engine..

Answer 5

an safc of rom tuning would be your best bet. BUT, your going to need to upgrade your injectors to make up for the extra air being forced into your engine.. The factory injectors were not made for that much air. you could install a FMU but it will make you run the stock injector pass their cycle duty and could result in fuel lock, and i only recommend the fmu for boost levels under 5 psi, If you have any other questions on turbo KA's just email me