SAFC and BTM or E-Manage

[KAT S14]

What would be a better engine management to use on a daily driven 95' running around 7psi with a T3/T04 E .50 or.57 trim and a .63A/R : an SAFC with 550cc injectors and a BTM, or an E-manage with the injector and ignition harnesses, pressure sensor and support tool with 550cc injectors.

[hannibal]

I like the emanage.According to the Emanage FAQ at http://www.mohdparts.com/emanage/EmanageFAQ.txt you only need the emanage, support tool, and injection harness. (See section 4.) It suggests running with a MAF and upgrading only to the pressure sensor only if necessary.with the pressure sensor installed, you can adjust your maps based on boost. you wouldnt be able to do this with the SAFC/BTM combo.And for 7 psi, 370cc injectors should be sufficient.

[Checkered-Member]

BTM is a piece of junk everyone on here will tell you that, it will cause more problems then it will solve...

The E-manage + support tool + injector & ignition harness + pressure sensor = stand alone like control and flexibility at half the price….

[virus77]

Yup I use the emanage it work like a champ. Just get the ignition harness only, which is the one that comes with the extra plug for the emanage, and use the extra wires from it in the original harness for injector control so you dont need the extra injector harness for $40

[Structure240sx]

i have the safc and btm, i vote for the emanage

[Mishka]

I wanted to add another question(s).I'm puting together a very similar set up and I got to that point when I have to decide which fuel management tool to use. Which out of two (e-manage and S-AFC II) is easier to install and use.Thanks a lot.

[virus77]

the basics of a emanage are nearly identical to a safc. if you add in the ignition harness, injector harness, external signall harness it gets a that much more complicated in wireing, but if you can do one you can do the other. That is if you understand wiring and readign simple schematics.

[hannibal]

i have the safc and btm, i vote for the emanage

That sealed my decision...

[KAT S14]

yep, i am definitely going e-manage.

[red240ne]

BTM just destroyed my distributor...

[ShifDown96240SE]

what is BTM?? I was going to buy apexi, but now greddy sounds better, how much is emanage??

[bruinbear714]

Emanage is like $400 if you get everything.

On a sidenote, I just discovered a hidden feature of emanage in that it can monitor injector pulsewidth and duty cycle!

[Structure240sx]

btm = boost timing master. its an msd ignition system that retards timing when you hit boost

[ShifDown96240SE]

thanks, so basically emanage is the best piggy back, and MSD SCI ignition is the best ignition with some iridium plugs

[SHIEF]

Is the emanage that much better than the BTM and SAFC? I mean I can see it is overall, but will it work that much better until you get the AEM standalone in a year or 2?

[bruinbear714]

Is the emanage that much better than the BTM and SAFC? I mean I can see it is overall, but will it work that much better until you get the AEM standalone in a year or 2?

IMO, the emanage is the best piggyback you can buy. Granted, it's $300 for the unit, $35 for the harnesses, and another $100 for the CD, you're paying a little over $400 for a unit that has a 16x16 fuel AND 16x16 ignition map. Furthermore, the points are user adjustable to any rpm/tps/maf voltage regions you want.

It can also use a pressure sensor if you max out the MAF, which I'll probably be using when my stock MAF maxes. For the extra $100, I think it's worth it. It's better than paying $100-$150 for a USED Z32 MAF.

Anyhow I'll let ya'll know how the emanage is after I install my turbo kit this weekend and play around with it on my laptop with a wideband.

[driftjunke]

What's the biggest size injectors a E-manage can control, I was told by Greddy Tech's 405's the biggest I can use?

J.D.

[virus77]

I will control more than that, thats BS. Ill let you know how it does on with 565cc this weekend. And if you are looking to have a electronic boost controller at some time, you can get the profec e-01 and use it with the emanage then you dont need the support tool, pressure sensor (since the E-01 takes care of it), its got nice features, together they work great.

[C-Kwik]

Emanage is like $400 if you get everything.

On a sidenote, I just discovered a hidden feature of emanage in that it can monitor injector pulsewidth and duty cycle!

You can actually monitor the MAF input and output signals from the E-Manage as well as timing signal adjustment, TPS signal and reference it to RPM. It can also datalog this on a laptop as well. It's certainly a nice feature but of course not enough to fully tune the system with. But it has helped me see what is going on a bit better. Like the fact that the MAF hits 5 volts at 6.5 psi before redline.

As far as injector sizing this has been discussed on the e-manage yahoogroups. I suggest anyone looking into one or that has one subscribes to the group. I am no longer on that list however as I no longer have my 240 or an e-manage. But their are some guys who really know this unit well and have some rather creative ideas. Back to the injector size. Greddy's specs indicate limit of 150% larger injectors. But then the understanding is they meant 50% larger or 150% of the original injecotr size. Hoever, many have tested this and the Greddy will compensate pretty much as much as you tell it to. The limitations come from the ability of the ECU to run such a small pulsewidth to idle with a large injector. Honestly, if you get to a point where this occurs, on any system, you likely have to go with additional injectors. Greddy has gone a step further and provided provisions for this already as well.

One thing I really like about the Greddy unit is it's ability to add it's own injector ground to keep the injectors open longer. So not only can it add fuel by altering the MAF signal, but it can add fuel by holding the injectors open directly. This can be significant in that the ECU will constantly be trying to adjust the pulsewidth so that the A/F is closer to the settings the factory provided. This can cause a lean condition under boost. Especially at part throttle moderate to high psi of boost. The E-Manage's ability to provide it's own injector ground essentially bypasses the ECU's injector ground and the ECU's own adjustements will not occur. While this is the theory behind it, I've never actually used it myself or seen wideband results with it so I am not sure how reliable or effective it is. I'd check with some that have used it on the yahoogroups. Interestingly, a copy of Greddy's RSX Turbo maps leaked through a unit that wasn't password protected from the factory and looking at that, Greddy chose to do a lot of their fuel adjustments using the additional fuel map as opposed to the altering the MAP signal.

[virus77]

for sure using the injector control is the way im going to go, i wont touch the air flow maps if i dont have to. But my concern im having now is that when you put in bigger injectors and ask it to compensate, which it does so with the maf signal, how much timing is it going to advance on its own.

[C-Kwik]

I never checked or had the equipment to check. With 6.5 psi on 91 octane fuel, I got some light detonation. I had backed off timing between 1-3 degrees at higher airflows and it seemed to do the trick.

[WDRacing]

Congrats on the G35 purchase C-Kwik...

[C-Kwik]

Thanks! Wish I had the money to turbocharge it.

[WDRacing]

You and me both, which is why I didn't bye the 350Z a few moths back. Cause I would have strapped myself trying to boost it.

Back on topic damnit...

[AceInhole]

e-manage is only worth it if you get all the harnesses with it, and the link cable and software, and a laptop. It's more like 700 + laptop in the end.

i'm about to try the BTM myself. i've heard most of the problems people have had have been from faulty wiring, but guess time will tell.

[Structure240sx]

well my motor hasnt blown yet at 13 psi. i hope my wiring is good but i still am kinda weary of it. im now thinking about gettin on a dyno with a timing light ready

[bruinbear714]

e-manage is only worth it if you get all the harnesses with it, and the link cable and software, and a laptop. It's more like 700 + laptop in the end.

i'm about to try the BTM myself. i've heard most of the problems people have had have been from faulty wiring, but guess time will tell.

It can be had for cheaper than that... the unit is under $300, the harness (you only need ignition, since it comes with enough wires to make the injector harness) is about $35, and the software is another $100 or so, grand total comes out to be about $450.

[SHIEF]

I'm going to go with the safc II and the btm, since I already have them. I agree that most problems are caused by people who don't know what they are doing.

[superhoss37]

I'm pretty sure mine is wired up wrong. If ANYONE can figure out exactly to wire this up to a 98 or similar distributor, please post exact instructions.

[C-Kwik]

What's wrong with wiring it according to the instructiuon manual? That was all I had used and it ran perfectly.