I am curoius about the impact of switching the stock regulator system in the T-netics kit to a return fuel system with a 1:1 FPR like the AAM or CJM. Anyone done this? I wonder if this is something that can be tuned for with the re-flash of the stock ecu??

 

Very doubtful. I'd be looking at the EU if you plan to do this.

Then again, I don't really see the point in running a full fuel return system and engine management unless you're going to be upping the boost. And, if youre going to be running higher boost, you might as well be building your motor, if you're dropping the cash to build your motor you might as well be going with a TT, etc... see where I'm going with this?

 

Reason I ask is that my car has a completely different fuel pump assembly from the coupe and 350Z. I pretty much have to use a return system to use the 255lph pump. IT would be just like the APS system though. Pretty inexpensive but I am curious about the effects on the stock re-flash tune.

 

Good point. Maybe you should check with Speed Dreams to see what their findings are with their installs.

 

Anyone have any fuel tank issues with the siphon dissabled on the fuel assembly with the t-netics kit?? Like below 1/4 tank running out of fuel ?

 

anyone?

 

I haven't had any problems running out of gas. Yesterday I took my car all the way down to where it said "-- mi" on the digital gauge and still made it to a gas station in time.

 

My brother took my car out and when he got back, it's out of gas like all the way down. I turn on the car and I can hear the fuel pump trying to pump gas and making alots of noises. I still can drove like 1/2 mile to my nearest gas station.

 

You shouldn't need to reflash for the return system. The Turbonetics kit sets fuel pressure at 53 PSI which is 7 PSI above stock so that under boost you never get below 46 PSI. I never have on my fuel pressure gauge....

 

The return system would be using a 1:1 regulator unlike the stock regulator...thats my concern. How would the re-flash react to the exponential fuel pressure increase as boost increased with an aftermarket 1:1 regulator??? PM sent to Brad to see if he can help at all.

 

Well I think if you set the base pressure at 46 PSI and use the 1:1 functionality you will end up with the same amount of fuel pressure as you would at full boost without one. The stock regualtor is modified in this kit to keep the fuel pressure at 53 PSI off boost but it drops as you transition to boost and seeing as how you will be under boost at 3k I doubt you will see a difference. You may run a bit leaner off boost but I don't think the difference of 7 PSI off boost is going to change anything. If you did want to custom map the ECU to change the settings Technosquare is doing this with Speed Dreams so that would be the solution should you want to alter the flash. However like I said I don't think its going to affect your AFR under boost at all. Bascially I think you would end up with the scenario that with the base kit you are dropping fuel pressure as boost increases to get to 46 PSI. In your case you would be maintaining 46 PSI of fuel the whole time and will end up with the same net result..

 

I wonder if the ecu would throw a code for a lower base fuel pressure??

 

I doubt it...I dont think the ECU even monitors the fuel pressure honestly. Its a varying fuel pressure in the z/G as we dont run a return system so I think it will work fine...I know that peking's shop did not modify his fuel pressure regulator and he is running extremely high fuel pressure and the ECU hasn't freaked out about that yet....