EB Turbo

iTrader: (1)

On your fuel map right click and select "View Raw". look and see if there are any cells that have "255" in them. If there are you need to rescale your MicroSec/Bit number. There is a parameter to log duty cycle on both primary and secondary injectors. Also you want to look at your staged injection table. there is a parameter that will set the maximum Duty before it defaults to secondary injector(Injector Duty Max).

By the way what pump, fuel injectors and fuel pressure regulator are you running?

EB Turbo

Aeka GSR

iTrader: (4)

Yeah my M/B was off, figured that out yesterday. I was only getting 55% inj duty from the primaries and secondaries.

I'm using an aftermarket pump, forgot which one, 550/1600 injectors and an Aeromotive FPR.

D.Walker has sent me a map to use before I figured out that the Microsec/bit was off. He seems to like the boost comp style map. I've never dealt with one but he has been very helpful over the phone. He spent an hour with me talking about the details of how to tune the map and just generally bullshitting about whatever, great guy.
Getting it to work is a bit of a challenge especially trying to get the TPS trim to work correctly. It doesn't help that I'm running a half bridge single turbo. Right now its just way too rich in vacuum and way too lean in boost.

D Walker

iTrader: (1)

Too bad I am not closer, would be a lot easier to help you.

EDIT: I also checked my m/s bit on the e-85 map and its 40, not sure if that helps.

EB Turbo

iTrader: (1)

The Microbit/sec number doesn't really matter what it is. It just needs to be big enough to allow for proper fueling at peak torque(highest fuel demand). However the lower the number the better resolution you have for individual fuel incrament changes. Ex. with an 90 microbit/sec number a single fuel incrament cahnge can swing the AFR 0.15-0.25. While a 35-40 microbit/sec number with one fuel incrament can change the AFR 0.05-0.075. AEM ecu's favor boost compensation because they allow for lower microbit/sec numbers. Microbit/sec numbers cannot just be changed. You have to properly modify the fuel table to accept the changes. If anyone needs help doing this i'm sure dwalker or myself will be willing to help. Just ask.

EB Turbo

Aeka GSR

iTrader: (4)

I saw a writeup on the ems forums on how to adjust it and keep the fuel from being adjusted too much. My Microbit on my non boost compensated map is already at 80 and changing it to 85 seems to be where it needed to be. I noticed it has a huge impact on low load situations as far as resolution (ie crap). So I'm going to go the boost comp route as I think it would work better in the end. Just gotta have the time to play with it. Not to mention the amount of fuel I go through when working with a new tune.

EB Turbo

iTrader: (1)

If you convert your current map to complete boost compensation and change the microbit/sec accordingly there is no retuning necessary. All you may have to do is add the throttle offset trim. Once you do the boost comp map it makes fine tuning the high vacuum and transition to boost section very easy. Understanding the mathematics behind fuel tuning really does make it slot easier.

EB Turbo

indio84

iTrader: (7)

good thread, hey Ebturbo post your cal file , i'm going half bridge port and single turbo.

EB Turbo

iTrader: (1)

I don't own a RX7. I work for Tri-Point Engineering in California. I am the engine builder and Tuner. My map library isn't that big. most of the maps I do are really specific. DWalker might be able to help you out with a base map. but I will be glad to help anyone with any AEM questions.

I've started to tune cars TPS as load and am finding very good results. my Microbit/Sec numbers are down to 25. Ive also split the leading ignition output and am running 4 LS2 coils on some cars.
EB Turbo