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Old 05-02-2003, 04:52 PM   #1
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Default HF / Si

Does the Si have the same ecu as a HF?
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Old 05-02-2003, 05:17 PM   #2
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Default Re:HF / Si

Nope, Pm6 is the SI ECU
pm8 is hf

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Old 05-03-2003, 09:55 AM   #3
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Default Re:HF / Si

is the wiring harness the same?
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Old 05-03-2003, 12:14 PM   #4
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Default Re:HF / Si

Explain what you are trying to do? you can put a SI motor in a HF, the harness will work and everything, but you cant put a 88hf harness in a 91 si, the wiring is slightly different and will not work. Just use the harness that is in the car, everything will plug up fine.

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Old 05-04-2003, 10:01 AM   #5
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Default Re:HF / Si

jeff, can the hf ecu safely run an si motor? i think thats what hes trying to say, and something id also like to know


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Old 05-04-2003, 04:07 PM   #6
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Default Re:HF / Si

so i *could just drop the d16a6 into a hf body and it would run fine?
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Old 05-04-2003, 05:54 PM   #7
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Default Re:HF / Si

HF ECU *could run* a HF, but it would run it like ----... safely? nah it would run pretty lean actually, especially since the HF ecu is designed for 190cc injectors.

And yes, you can just drop a A6 right in a HF, plug and play, no worries, just need a SI/Pm6 ecu!

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Old 05-04-2003, 09:39 PM   #8
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Default Re:HF / Si

i was just thinking of my next project car. im thinking a 88 CRX HF would probably be the best place to start, im having trouble finding one that isnt rusted to peices though. i plan to stay d-series with huge boost, thats why i was wondering about the wiring harness.
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Old 05-05-2003, 01:46 PM   #9
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Default Re:HF / Si

Quote:
Originally Posted by BoostedBSeries
jeff, can the hf ecu safely run an si motor? i think thats what hes trying to say, and something id also like to know


Brett
The Si ECU will not allow an HF motor to start, too much fuel, if that says anything.
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Old 05-05-2003, 01:52 PM   #10
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Default Re:HF / Si

no no no other way around!!!

Si motor, HF ECU, and no, use Si both.
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