Enough fuel management

[92_4g63]

I am building a custom kit for my 2.0(4g63) was wondering if you guys thought a SAFC and a NT ECU would be able to manage 8psi with a 14b or do you think I should invest in a turbo ecu and SAFC?

I also plan on using 450cc injectors, 190lph or 255lph fuel pump and an aftermarket FPR


I am trying to avoid rewiring a turbo MAF and buying a new ECU what do you think? I imagine I would be fine because 2g still use their NT ECU.

 

[TheBoz]

I ran the NT ECU with just an SAFC, and it was not very easy to get my car running well. In fact I was never able to get my car running properly. Once I switched to a TURBO ECU, my car ran 100% better. I still needed to do tuning with the SAFC because I am on an EVO3 16G and 550cc 255lph AFPR(43psi). With the 14b, 450cc, and 190lph and AFPR, you should be able to run with out an SAFC because it will be like a stock car. Just add the Knock Sensor and do the rewire. It is very easy.

Read all the threads about how to swap and you will be able to do it in no time. Feel free to hit me up, I just finished my car and am out tuning it now, but I need some bigger injectors.

So Get the Turbo ECU, they are like 100 bucks or 200 for EPROM. The stock Knock Sensor is like 50 bucks, and a 1g maf is like 30 bucks. Get some wire from radio shack, and just go the the junk yard for the extra pins from the ecu.

Good Luck.

 

[92awddsm]

If I remember correctly, the n/t injectors are somewhere around 230cc(someone correct me if Im wrong) With that being said, 450's are almost 100% larger than stock so the afc will not be able to control them. You only have +/- 50% adjustability with the afc so you would never be able to even get a descent tune at all. Like already stated, you would be better off going with the turbo ecu and maf. Dont forget, you will also need to wire in the injector resistor pack from a turbo car in order for it all to work properly.

 

[92_4g63]

Yeah I know what is required for the conversion just wondering if I could do I without the ecu but sounds like not so thanks for the info.

BOZ what psi did you run with the 14b? with the 16g? were you still on stock internals?

 

[GSGoinFast]

If I remember correctly, the n/t injectors are somewhere around 230cc(someone correct me if Im wrong) With that being said, 450's are almost 100% larger than stock so the afc will not be able to control them. You only have +/- 50% adjustability with the afc so you would never be able to even get a descent tune at all. Like already stated, you would be better off going with the turbo ecu and maf. Dont forget, you will also need to wire in the injector resistor pack from a turbo car in order for it all to work properly.

umm your math is a little off, even tho the injectors are 100% bigger, they are only about twice as big, so 50% of 2 is 1. so you would be able to lean it out enough with the s-afc because 50% of 450cc is 225cc, but i still agree with you, not smart to run the s-afc and NT ecu with those big injectors. you could get an adjustable fpr and drop the pressure, but it seems you would just be better off with a turbo ecu.

 

[92awddsm]

umm your math is a little off, even tho the injectors are 100% bigger, they are only about twice as big, so 50% of 2 is 1. so you would be able to lean it out enough with the s-afc because 50% of 450cc is 225cc, but i still agree with you, not smart to run the s-afc and NT ecu with those big injectors. you could get an adjustable fpr and drop the pressure, but it seems you would just be better off with a turbo ecu.

If my math is off, then us turbo guys should be able to double our injectors and run 900cc with the afc. We all know that isnt possible so if you rethink it, he has 230cc injectors. Now, add 50% to that and you come up with 345cc. Regardless of how you came up with your math, thats all the safc will control. You CAN ONLY run an injector 50% larger than stock and still have good control with an afc.

 

[GSGoinFast]

If my math is off, then us turbo guys should be able to double our injectors and run 900cc with the afc. We all know that isnt possible so if you rethink it, he has 230cc injectors. Now, add 50% to that and you come up with 345cc. Regardless of how you came up with your math, thats all the safc will control. You CAN ONLY run an injector 50% larger than stock and still have good control with an afc.

no, well either way its not good to run an injector where you need the s-afc to be at -50 for it to idle right. but, your comparing it to the stock injector. you could, with enough pulse duration time available(which there isnt) get the 235cc injector to flow like a 345cc injector with it at +50%. because a +50% increase of 235cc would give you 345cc(well thats what you said i didnt check it ) now, a say he has a 450cc injector, a -50% pulsewidth would make it flow like a 225cc injector. again, not good to run it this way since your timing gets messed up and shit, but still its just the principle behind it. you could run an injector twice as big and have theoretical control over it with the s-afc since 50% is half. but its not good to do that, just the theory of it.