I was told by the guy who is building my engine not to use my fmu. he is saying to just let the emanage control the uel, and to take the fmu out. What do you guys think?

 

Can your E-manage control your fuel curve?

 

do you have 370cc or larger injectors?

 

370 and yes it can control the fuel curve 16x16 map

 

he is right, NO FMU with the Emanage and 370s...the adjustments will be made in the fuel tables

Corey, did you upgrade the fuel pump?

 

Yes walbro addae, according to this guy he is saying that the even if the car is ready this week, i should not take it to the dyno this week. He is saying i should give the car about 1000 miles before taking it to tune it.

 

yeah I guess so...break in I guess. but damn the car is gonna be running crazy without some sort of "tuning" put into it. hmmmmm....shot in the dark, but maybe you should run it with the stock injectors for now??? other than being kinda slow off boost(cause of the low CR) it won't be running pig rich and idling to all hell with the untuned 370s. once again I'm shooting in the dark here...anyone else input?

 

What's a stock maf rated to?

 

I thought it was something like 300-400 (350?) fwhp. Anyone going above that doesn't really need the excess readings from the MAF however, since the big boost in fuel is sent by a boost controlled FMU. This is boostable however with the MAF harness available for the eManage which boosts it a fair (25% or something?)

My numbers are not that correct but you get the idea. If you're planning on running a nutty amount of HP like hlh, you will definately need an fmu or a heftier MAF. Also, the eManage is difficult to tune because of the amount of pieces in the rpm vs throttle graph. It will require a LOT of hours on a dyno if you're not going to be using an FMU.

 

I dyno'ed my car 1 day after it was done.. about 26 miles on the turbo.

I think it is way too complicated to not dyno tune the car now with all the stuff you want to run, you could really come close to messing something up... unless you want to run like 2psi or something like that and get fuel pressure near stock for a "break in" period.

 

yes, but you weren't on a fresh built motor? If I understand the situation here, he is - which in that case it needs to be broken in. I would keep away from serious boost and just break it in normal, then switch to emanage, injectors etc and get it running rich and head to the dyno.

As far as MAF, I don't know the actual number but I was under the impression it was mid 300 HP? If this is the case, seems as though you will be needing something else to help fuel whether it be a FMU, or something that can measure the amount of airflow without maxing out. Another question is what can the 370cc injectors support on stock fuel pressure?

This is all said without knowing what HP goal you have. Just make sure and check where stuff maxes out (MAF + Injectors) if you are going the electrically controlled fuel route (NO FMU)

 

Question, do you have an adjustable FPR? Or can the emanage control larger injectors at idle too?

 

the pressure sensor that comes with the emamange is a 3 bar so it should be fine in temrs of allowing proper scaling of the injector maps. plus from my reading on the mailing list, the emanage will adjust for larger injectors and the maps can be scaled RPM x pressure when using the pressure sensor which makes things pretty simple. from my experience with most larger injectors and ECU fuel mapping on hondas, you'll want a 1:1 FP ratio so no FMU. the emanage's whole purpose is to eliminate the use of FMUs etc.(at least thats my impression) and allow you to manipulate the injector duration at various RPMs. so since the 370s will already run rich, you will lower the duration at various points till the a/f is "tolerable"

 

Who is biulding the motor for you? What parts are u using? And how much would it run? Thank you.

 

Very true.. forgot about that little gem.

 

I know the 300zx MAF sensor is an upgrade for us and we can adjust that with the e-manage. I was wondering if anybody has heard of someone using a Q45 MAF. I heard that was an upgrade for 300zx and soem skylines use it. Anyone heard of this.

 

According to JWT, 350 hp at the flywheel. That would be about 290 hp at the wheels. The Z32 maf is good for 520 hp at the flywheel.

 

my lack of emanage knowledge shining through MAP very nice, then no need to worry about the MAF. only other big thing i would check is what are 370cc at stock fuel pressure good for (HP they will support at stock FP)? other than that I would assume emanage can run them at idle

 

Corey, the e-manage has the automatic injector conversion setting for injector size so it should work fine. IMHO, Dont boost for the first 1000 miles either. Change the oil and filter after ~150miles ,then again at 1k, a motor built by a shop is not going to be as clean as a factory motor. Only run non-synthetic for the first 1k.

Confused put down 322whp with 370cc, JWT ECU, 7200rpm, A32-MAF. According to my calculations thats about it, 95% duty cycle, 0.60 BSFC with a 1-1 factory style fuel pressure regulator and 10psi of boost (53.5psi fuel pressure). 555cc should be ok for ~473whp @ 10psi boost. 515cc I have should support 439whp @ 10psi boost.

You will need to watch your injector duty cycle of MAF voltage when you tune it because you can easily over shoot the 320whp mark! You need 555cc injectors

 

still though you can't exceed the OEM MAF, the Greddy MAP is pretty much only used to tune the maps in temrs of boost pressure, rather than default TPS voltage(which seems harder to me). but its funny that JWT only rates the MAF at only 290(350 flywheel)...when many(like yourself) have CLEARLY exceeded that wihout compromising efficiency. I dunno that kinda confuses me. as for the 370s I can't remember exactly what JWT told me(Stephen might now) but without the Z MAF and at stock FP I think the 370s were good to ~350+/-fwhp with their JWT ECU...again thats a guess from what I was told last summer. another good thing is the Emanage should monitor injector duty cycle so that will be something to watch as well.

 

Most others are using FMU's so ramping up the fuel pressure at 100% duty cycle is how its done. The Z MAF has more resolution, so they can fine tune the flow, with the A32 MAF due to lack of resolution they make the higher end very rich, as a safety margin.

 

well my horsepower goal is 400 to the wheels. Addae is correct about the map sensor , so there is no need to worry about the stock maf. I was thinking that if the switches on the emanage were set corectly from the beginning and the 370' were inputted in the support tool software, that the fuel curve should be pretty close and hopefully not much tuning should have to be done.

Mardigras i originally was going to get 555's for the car but could not afford them at the time and remembered that you had put down 435 with 370's so i thought 370's would be ok for the amount of hp that i want but i guess maybe not. Where are you guys getting your 555's from?


I will post a little later, all what is in my new engine.

Also the engine will be at 8.2:1 cr so i am planning on running 15 lbs of boost.

 

Im gonna run 15lbs on my stock motor, at least once J&S is da shiznits! Yes JWT ECU and J&S

with 15lbs you will surpass the 370s abality to supply fuel with out an FMU, be carefull.

I got my 515's off of e-bay, they are not a direct fit, I would rather have the direct fit 555cc.

 

Nah! Custom fuel rail and top feed 780ccs! .... Actually would turn out cheaper or about the same as trying to get 555s that fit. Controlling them is a whole other issue though

 

what exactly does an FMU do?

it manages fuel...but how?
is it a sorda piggy back to the ECU?
is it electronic? like a SAFC? is that the same thing?

 

it increases fuel pressure as boost pressure rises...when people say they are running a "12:1 FMU" that means for evey pound of boost, fuel pressure is increased 12psi. so the motor gets plenty of fuel as boost rises. and its mechanical and its not the same as the AFC at all.