Engine management

[B-Boy DuB-L]

I am buying a rebuild kit along with a turbo kit. i would like to be able to run like 8-10psi normal driving and higher boost around like 16psi for spirirted driving. So i would like a management with multiple maps. Can anyone help and tell me the best product for my needs

[SeanC]

buy a standalone that a GOOD tuner in your area is familiar with.

[B-Boy DuB-L]

anyone else

[B-Boy DuB-L]

any one i need help asap and i also read for hours and i dont know wut to use i was thinkin bout the megasquirt but i nor anyone i know in my area has any experience with the product

[480sx]

You dont need to have multiple maps, you just need a MAP based tuning system. Basically it gives you fuel based on how much air your engine intakes..

Go with AEM EMS if you got 1500+ bucks to throw around, or a modified Power FC can do the trick too. Theres more options, but you need to do some research and find out whats best for you.

[B-Boy DuB-L]

well i was thinking to go with the megasquirt

[Zippy69]

just get your ecu tuned to your set up, cost more, but no worries and upgrade is usually pretty cheap.

[B-Boy DuB-L]

so if i do that then it wont matter if i up the boost because the ecu will modify its settings to compensate for how muhc air is being pulled into itcorrect?what would be correct for tuned ecu, as in JWT, Emance, etc..

[eazye2000]

To an extent. It wont pull anymore timing that it's told to reference off the tables.. Which is there because you told the tuner what parts you had. So if you add more air/boost, it won't pull anymore timing and BANG.Or so I would think. Maybe I can't explain myself well... more than likely...

I personally bought the Emance daughterboard and had him tune it for what I have right now. It works awesome, and I've not had any problems yet. Just a little tweak for AFR's with the SAFC, but that's it.

And yet another wasted $.02

[Zippy69]

so if i do that then it wont matter if i up the boost because the ecu will modify its settings to compensate for how muhc air is being pulled into itcorrect?what would be correct for tuned ecu, as in JWT, Emance, etc..

I think so, but I'm not 100%. Contact jason(drape123) at e-mance for all tech stuff.You can find him on e-bay motors, type in 240sx ecu. He is soopa doopa helpful

[480sx]

With a stock ECU tune like Enthalpy's it will only pull a set amount of timing based on what you tell the tuner your max boost will be. If you plan on cranking up the boost past that, you will need a new tune, or a reflash.

To an extent. It wont pull anymore timing that it's told to reference off the tables.. Which is there because you told the tuner what parts you had. So if you add more air/boost, it won't pull anymore timing and BANG.

This isnt true at all. Every MAP based ignition tuning system runs RPM vs kPa values, just like the fuel table. So it works the exact same way, IF you have your values set to accommodate the extra boost(for the extra needed retard in the timing). If not, it will just extrapolate the values that are outside of its bin.

Megasquirt is a pretty serious ordeal. If this is your first turbo project, i wouldnt recommend it. People have had some good success will MS1, but MS2 is still being a PITA for everyone who trys to use it. Not saying dont use it, but i learned from experience. Bought MS2 and had my car down for 3-4 months while i messed with it. After it fried a chip on the board and killed my starter, i switched to an Enthalpy... I have yet to hear of one success story for MS2 and the KA dizzy. So if you do decide to go with ms, go with MS1.

[B-Boy DuB-L]

oh so they will tune it to a certain boost so lets say i told them i will boost it to 15psi. Could i still run daily w/ a lower boost like 6psi or would i have to mess with afr considering it is setup for higher boost

[WDRacing]

You guys are making this far more complicated then it needs to be. Any engine management system, whether it's JWT or AEM EMS will do the job basically the same way. The values are set to retard timing and add fuel proportionally to airflow. Doesn't matter whether it's a MAP or MAF based system.

What you need to do is figure out how much power you want as an end goal. Don't bother thinking about your daily driving at all, since it's totally irrelevant. If you have a dual stage boost controller, then that's all you'll need. The ECU will take care of the rest assuming you have it tuned to the highest boost setting you plan on running. When running a lower boost, the ecu will take care of everything because it sees how much airflow you have from the MAP or MAF sensor. So it will add less fuel and take away less timing.

In short, say your goal is 350whp. Get a ROM tune for 72lb injectors from JWT or Enthalpy...done. You can have one semi custom done by specifying what you have exactly. But it will still work the same way.

WD

[B-Boy DuB-L]

dammnn WD all the asnwers i was looking for. thanks lets say i was looking for tops 400 then 72lb low injectors would still be good right

[eazye2000]

Yeah, don't listen to me. I don't know what I'm talking about.

Or so I would think. Maybe I can't explain myself well... more than likely...

Maybe someone didn't read that part.

Regardless... If you don't want to mess with tuning. Do as WD said. Get an ECU tuned for the max HP you want to make. Or the max psi you want to run.

And again, I will quote myself..

Or so I would think. Maybe I can't explain myself well...

[B-Boy DuB-L]

well its not that you didnt help. its just that WD explained it a little better

[hollywood95240]

how much horsepower will a safc11 and avd withstand dependability wise

[WDRacing]

how much horsepower will a safc11 and avd withstand dependability wise

Whats an AVD? The amount of "power" depends on the entire setup not just the SAFCII. But as a reference, the SAFCII can trim 550cc injectors at the max trim. They will flow enough fuel for 400whp. But you'll need something for ignition retard on boost. I suggest the MSD BTM.

WD