I dont think it's Technosquare magic.

Injector size and fuel pressure/flow are limiting factors regardless of what TS or eManage dials in. I can dial in more fuel..but if the injectors cant deliver it due to low fuel pressure/volume, it will not make a difference.

Here is my theory on it. To my knowledge, nobody with the Greddy TT has done 8psi or greater without the fuel pump upgrade. With the TT, we hit max boost and torque at 3000rpm, vs. an SC that hits its peaks at redline. So I feel the TT puts more strain on the stock fuel pump, much earlier int he power band...so by the time I get to 6000rpm, i am running leaner than idle. With an SC, the fuel requirments are much more progressive, so you arent noticing the AF dip as much.

This is just speculation on my part, but I cant explain it any other way.

 

how does the Profec actually measure IDC? There are right and wrong ways of doing it, and I ahver found not every device does it the right way

easiest way is to look simply at the pulsewidth (as measured in milliseconds). From there it is very easy to figure out the actual IDC

 

Z1, the Profec measures stock injector pulse width, and stock duty cycle. it also measures TOTAL duty cycle and pulse width.

i am not really sure how it measures IDC. Do you?

 

ok now im very interested in which motor it is, is this a cyclone motor? im not sure what code it is but the one out of the truck in japan.

 

I ordered the ZT2 because I thought you already had it working with the E-01

It's being installed now so I guess I'm the gineua pig for this one...

-D

 

Did you also order the LCD? That looks pretty cool. I went with AEM UEGO Wideband O2 Gauge well it's on it's way to me. I will hopefully hook this up to the E-01 for logging.

 

I will be logging A/F to the E-01 only. The only gauge will be Fuel Pressure and that sits in the engine compartment (custom fuel setup coming...)

I didn't get the LCD because I'm trying to keep the number of gauges down. Once I let one gauge in the interior, then I will need 2 more, a triple pillar pod, a GTech Competition Pro, Defi Link controller, second mortgage...

-D

 

hey 350...dont forget to order the optional signal input harness so you can have Eric connect the AEM output to your Profec. I think they are about $20 from Mohd.

I am going to Eric this afternoon, and he is going to move the guage from my dash over to the pod, and connect the signal harness.

Hey, call me...I have some really exciting news about some road tuning I have been doing...I havent posted anything just yet.

 

The emanage will measure duty by watching how long the current is on the wire, lets say 4ms. Then depending on RPM it can figure out how long the injector could be open at that rpm, lets say 8ms max - that would be 100%. So the actual duty cycle would be 50%.

If its measuring the total duty cycle is adds the value in the emanage map to the ecu duty time and devides it by the available duty time for that given rpm.

That's the main reason to upgrade the injectors, they may not be able to flow enough fuel at high rpm because they have a very short amount of time to spray enough fuel to match the air. The emanage seems to do a good job in analizing the duty cycle and adding duty via the hot wire without droping the current after the ecu drops current. That's a very difficult opperation in my opinion.

Derek, nope I have not installed the Zt2. I ordered it yesterday but I had posted before in theory it would work. I guess we will see when you and I get in installed.

The coolest thing is we can setup a warning light and audible alarm on the e-01 if the a/f drops too low. It should work out well. Also the logging function of the e-01 is nice. We can record RPM, A/F and Boost to tune the e-manage fuel map on the street.

It's the Chrysler 420a 2.0L DOHC. It will make around 350 whp at 18 psi on the 20g turbo. Then I might throw the 2.4L longblock on it and make some more power. This engine is basically the same as the one found in the srt-4. I have the 2.0L shortblock the srt-4 has the 2.4L longblock. Much much better motor than the 25 year old 4g mitsu series. The 4g in the evo is another story, they finally updated it. Very nice motor indeed.

 

I'll know in a couple hours (and post results).

I was thinking about this as well, but came across one problem, I think the warning is only on one axis. You could set the E-01 to warn if A/F rose above 12.5 (for example), but what about low RPM's below 4k where the A/F is high? I'd sound like the local ice cream truck unless I was under boost

Now if it could warn based on 2 axis... (A/F > 12.5 && RPM > 4000)

I might just hook up the LED and learn to ignore it unless I'm under boost.

-D

 

Lol! Yeah. I think their was a function something like that. If this is above and that is below throw warning. Probably not, It was just a dream!

 

yeah, I never thought about that. This makes the A/F warning useless. becuase when you are idling or cruising, you'll be near 14:1, so the alarm would be constantly on......there has to be a work-around for this.


Also, if you wanna do some really advanced l0gging, I discovered that the Greddy Support tool software can datalog ALL 20 or so of your inputs simultesouly..and graph them. Pretty freaken neat! So now you dont have to choose 3 like you do with the Profec.

 

ETX:
Got the ZT2 installed and wired into the E-01. We set the voltage and conversion that was given in the instructions and it seems to be working except the numbers don't look accurate to me. At idle it shows 18+ and under boost it drops to mid 11s and then climbs back up, going into 14-15 range. This is not consistant with my previous dyno runs, done at higher boost than what I'm running now. At an A/F of over 13 we experienced detonation on the dyno, yet this thing reads 15 with no sign of pinging. I'm hoping it's just a conversion issue and not a bad unit.

I'm scheduled for dyno time Mon afternoon for some tuning so I can compare readings then.

-D