60# Deka Injectors with stock ECU (A9L)

419 Views 6 Replies 4 Participants Last post by crzymofo, 2 mo ago

crzymofo

Discussion Starter · 2 mo ago

If I were to install my Deka 60# injectors on my 93 mustang with the existing ECU (A9L), will they work?

And please forgive my ignorance, but can engine tuners “tune” a stock A9L via some sort of piggyback chip, or can tuners only tune stock cars by tuning the FMU and the air/fuel ratio (im installing a Vortech on the car next weekend)?

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Fast4Eye

· #2 · 2 mo ago

If you install the deka 60s you would need a calibrated maf with the fmu or have the car tuned, no real reason to have both done. But i feel that deka 60s without a good tune would make the car pig rich even with the proper fmu disc.

I would just leave the stock injectors and the appropriate fmu disc if you're going that route, don't half upgrade by doing the injectors and nothing else.

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96pushrod

· #3 · 2 mo ago

Yeah you can run injectors that large, or even much larger on a stock eec but it needs to be tuned to do so. A calibrated maf can get the car running, but will likely still need work to get it running correctly.

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crzymofo

Discussion Starter · #4 · 2 mo ago

Fast4Eye said:
If you install the deka 60s you would need a calibrated maf with the fmu or have the car tuned, no real reason to have both done. But i feel that deka 60s without a good tune would make the car pig rich even with the proper fmu disc.

I would just leave the stock injectors and the appropriate fmu disc if you're going that route, don't half upgrade by doing the injectors and nothing else.

Thank you!!

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crzymofo

Discussion Starter · #5 · 2 mo ago

96pushrod said:
Yeah you can run injectors that large, or even much larger on a stock eec but it needs to be tuned to do so. A calibrated maf can get the car running, but will likely still need work to get it running correctly.

Thank you!!

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Blown85GT

· #6 · 2 mo ago

I agree with what 96pushrod said.

Also, you do not need or want an FMU.
FMU was a 'bandaid' for too small injectors.
If 60's are too small, go bigger (along with tune).

I guess you didn't state what the rest of the engine consists of. What heads, cam, intake?

As for tuning, there are a few options. They are a 'chip' that plugs into the ECU.
I have a Tweecer, Moates was another but they are out of business. I'm sure you can find a used one out there.

With the Tweecer, I'm actually running 60lb Dekas with 80mm ProM 'calibrated' for 42's.

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crzymofo

Discussion Starter · #7 · 2 mo ago

Blown85GT said:
I agree with what 96pushrod said.

Also, you do not need or want an FMU.
FMU was a 'bandaid' for too small injectors.
If 60's are too small, go bigger (along with tune).

I guess you didn't state what the rest of the engine consists of. What heads, cam, intake?

As for tuning, there are a few options. They are a 'chip' that plugs into the ECU.
I have a Tweecer, Moates was another but they are out of business. I'm sure you can find a used one out there.

With the Tweecer, I'm actually running 60lb Dekas with 80mm ProM 'calibrated' for 42's.

Thank you! I will be purchasing a Tweecer and ProM. Thank you for the insights!

btw, it’s currently a stock engine, but I have AFR 165 heads, edelbrock performer II intake, msd distributor, a Vortech SCI, and a few other things sitting in my garage waiting to go on.

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