Turbo Fuel questions. (got almost everything!)

[4g64terror]

i run 720cc injectors with absolutely zero idle issues, adn zero out of boost issues.
the reason larger injectors run crappy on stock maps is because they let out more fuel when opened for the same amount of time(pulsewidth/deadtime)
your factory ecu has the proper calibration for yoru stock injuectors dialed into it. with a chip he can modify it so that your larger injectors open the appropriate length of time to maintain the same results.
so with a chip, any size injector from 50cc to 1500cc can run like stock without any difference in mileage, drivabilty, or a/f ratio.

if you can get jeff to chip yoru ecu for whatever size injectors you want, you won't have to tune, so long as he can change the wot target a/f ratio's to a more boost friendly level, as opposed to the n/a 14.7:1

wow now see THAT makes alot more sense...only thing is that under different throttle positions and load scenarios, the car will need to have the fueling adjusted accordingly...so with that said, how will the newly chipped ECU know to add more fuel under these various driving conditions? Does the stock mass air have the ability to help adjust it that much? What about the BAP sensor? Do you have to run a checkvalve so it doesnt see boost?

[4g64terror]

Ok guys. About re-chipping the ECU. This is the question I sent DSMChips:



--- [email protected] wrote:

>Ok here is the deal. I am going to turbocharge the
car and was told that you
do ECU chipping. Now my car is a 1995 and the guys
are telling me thats and
EPROM ECU so I didnt know what you could do for me.
Actually I dont even
understand how you COULD make it work but heres a
look at the setup:

Stock 4g64 SOHC
2g eclipse manifold and O2 housing
14b turbo
all stock 2g intercooler piping and SMIC
I was told to run 450cc injectors and a resistor
box.
Galant MAF
2G downpipe
Stock exhaust
re-wired 255lph pump


Now, they said that instead of using an SAFC, that I
should consider your
chipped ecu instead. So what can ya do for me? I
dont see what you could do
about ignition stuff unless I ran a knock sensor
some how. Also,. will I have to
run an Aeromotive rising rate fuel regulator since
our stock ones arent?
Basically I want it to idle well, run well at part
throttle, and run well at
WOT. I dont plan on running more than spring
presurre (9PSI i suppose). Will the
ECU be adaptive at all for the different
load/throttle situations it will
encounter? Sorry about all the questions, just
curious and ready to do this.


And here is his answer:

Well, there's 2 ways you could do that:
1) The *proper* way would be to swap your ECU out for
one that is made to work with a turbo motor. It will
have the factory boost maps that have the correct
timing and AFR for a boosted engine. However, I think
the ignition coil setup is completely different, and
there may be other pitfalls I'm not aware of, besides
the complete ECU harness rewiring. But, when you are
done it will run properly, and you would also have a
knock sensor to detect knock, and retard the timing if
necessary.
2) The other option would be for me to simply correct
your factory EPROM for the larger injectors. But, the
big issue that would remain would be that the factory
AFR maps would be way to lean, and the timing maps
would have way too much advance for a boosted engine.
Also, the Non-Turbo maps are made for MUCH less
airflow than a turbo ECU, so you will undoubtedly
outflow the stock maps as soon as you hit any boost. I
could *try* to correct for that by modifying the top
couple maps, to make them richer with less timing
advance, but I've never tried that before.
As you said, the one big downside will be your
inability to see knock with this setup, so you will
have to run very rich, to error on the safe side, less
timing advance, and keep the boost down. But, if I
only modify the top 2 maps this shouldn't effect the
daily drivability.
I would need to know more about this "Galant MAS". Is
that the stock 1995 Galant MAS? What part numbers are
on it?
Your stock FPR should be fine. As far as I know, all
factory FPR's are 1:1 rising rate. The non-turbo ones
just run higher pressure, like 48 psi I beleive, and
never see boost. But, that shouldn't keep them from
increasing the fuel pressure if you put boost into
them. But, if you have access to a cheap turbo FPR
that will bolt onto your rail (1G or 2G?), you may
want to run it, simply because you don't need that
much fuel. I need to know what base fuel pressure you
are going to run before I can design a chip.
I REALLY don't like that you are running a rewired 255
pump. That is WAY overkill for your setup. You are
going to overrun the factory FPR, giving you too much
fuel pressure at idle, making you too rich. A stock
turbo pump without a rewire would be more than
sufficient, and won't cause fuel pressure issues.
Take care,
Jeff O.
dsmchips.com


Basically what I am trying to show you guys that re-chipping your ecu is not going to work. He's just too un-sure about it to trust an engine to it. hope that you guys that suggested this route read this and not offer it up again as a suggestion for someone in my shoes. This should be stickied.



With all of that said, anyone got a link to swapping in a turbo ECU with a SOHC head?

[seth98esT]

The 7g MAF is the exact same MAF as a 2g. Im not sure how the 95 Galant EPROM ECU works, if the fuel/timing maps are stored on the EPROM like the 2g EPROM ECUs or what not.

You cant run a 1g or 2g turbo ECU unless you do a headswap as that ECU's ignition is setup for coil packs and not a distributor.

I say just go with the Greddy Emanage Blue and call it a day.

"There is a 16x16 airflow adjustment map, larger main injector correction adjustment, upgrade air flow meter adjustment, boost limiter cut, anti-engine stall, VTEC-fuel adjustment, real-time map trace, real-time display, real-time communication and basic Data-logging. If the "Optional Ignition Harness" and the software are used the unit has the ability to control a 16x16 ignition timing map."

Probably the best bang for your buck at $300 for the unit. By far more options then an SAFC can offer.

[seth98esT]

The 7g MAF is the exact same MAF as a 2g. Im not sure how the 95 Galant EPROM ECU works, if the fuel/timing maps are stored on the EPROM like the 2g EPROM ECUs or what not.

You cant run a 1g or 2g turbo ECU unless you do a headswap as that ECU's ignition is setup for coil packs and not a distributor.

I say just go with the Greddy Emanage Blue and call it a day.

"There is a 16x16 airflow adjustment map, larger main injector correction adjustment, upgrade air flow meter adjustment, boost limiter cut, anti-engine stall, VTEC-fuel adjustment, real-time map trace, real-time display, real-time communication and basic Data-logging. If the "Optional Ignition Harness" and the software are used the unit has the ability to control a 16x16 ignition timing map."

Probably the best bang for your buck at $300 for the unit. By far more options then an SAFC can offer.

[4g64terror]

The 7g MAF is the exact same MAF as a 2g. Im not sure how the 95 Galant EPROM ECU works, if the fuel/timing maps are stored on the EPROM like the 2g EPROM ECUs or what not.

You cant run a 1g or 2g turbo ECU unless you do a headswap as that ECU's ignition is setup for coil packs and not a distributor.

I say just go with the Greddy Emanage Blue and call it a day.

"There is a 16x16 airflow adjustment map, larger main injector correction adjustment, upgrade air flow meter adjustment, boost limiter cut, anti-engine stall, VTEC-fuel adjustment, real-time map trace, real-time display, real-time communication and basic Data-logging. If the "Optional Ignition Harness" and the software are used the unit has the ability to control a 16x16 ignition timing map."

Probably the best bang for your buck at $300 for the unit. By far more options then an SAFC can offer.

Um youre wrong...you can do the turbo ECU with the SOHC head if u modify the distributor...show me where someones tried it and it not work because there is a tutorial that SHOWS you how to do it in the 7g section..

[4g64terror]

also I dont see ANY kind of knock control on the Emanage...show me someone who uses the Emanage and Ill consider it.