NL-S13

I have a 1991 S13 silvia with the E5 ECM and it has a black and red wire soldiered to a board that run outside the ECM but connect to nothing. would really like to know what this is for ANY SUGGESTIONS HELP

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1991 Silvia Sr20DET

NL-S13

Also anyone know what those two chips might be for? The two with the writing on them.

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1991 Silvia Sr20DET

silviamang

Looks like the other daughter board is another fuel map for the car. Probably was tuned for higher boost and higher grade gas. The two wires were probably hooked to a switch so you change between the stock fuel maps during daily driving, and the tune for aggressive driving. That's just best guess tho

NL-S13

Car came from Japan this way. Any idea how I could check to see what this tune is? I've had the car for a few years but am now only really getting into the whole modifying thing and have no clue how I could check this. I do know that if I put a full quart of TORCO accelerator in each tank of gas the car runs 100 times better then without it

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1991 Silvia Sr20DET

Kingtal0n

there is a jumper on the board you can move to re-enable the factory tune so you can use cheaper gas. (and remove the daugher board if you want)

NL-S13

Is there any way of telling what the tune is if I wanted to do that?

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1991 Silvia Sr20DET

NL-S13

Not overly interested in returning to the stock tune if it's running off the daughter board as I always run supreme and a full quart of TORCO accelerator in my car anyway and really don't know what else is done with the car performance wise so I don't want to play with it too much just want to find out what these tunes may consist of if there's a way of doing so

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1991 Silvia Sr20DET

silviamang

Not really any way to know what the tune is for sure unless you were able to get in contact with whoever tuned it. But it would probably be safe to assume if it came on your Silvia that it is tuned for any/all of the other aftermarket parts on the car.

As what was said earlier, you could always just remove the board to put it back to factory fuel map.

NL-S13

Can anyone tell me what the M10 and M20 mean on the two chips

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1991 Silvia Sr20DET

ultimateirving

Delete. Wrong answer

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Z32 with lq4 swap
Desert Street Scene || Dssevents.com

cotbu

It could be as simple as left and right or odd and even. The pictures don't look all that detailed on my phone so that's my answer. You could dump the bins if you have the consult port wired up and a program like nds. I would have you dump them both ways, and send them to me just in case they need to be merged. If I was looking at the tune? Reverse the k, then subtract the injection to see what mafs and injectors it is tuned for, see if the cranking tables are properly adjusted. Overlay fuel and timing maps to see if they are modified for cams or just boost up. That is what can be done or I could remove the chips, rewrite a tune for what you do have, then burn the chips! Its probably written in odd/even format.
If I had the bins or the daughter board I cold tell you. It might be written somewhere on the board.

From a Highly Tuned Note 4.5!!!

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LoverTechnologies "Half Broken Things!"

NL-S13

This is what's written on board itself "Type/94C16 SRNEW06" any ideas?

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1991 Silvia Sr20DET

cotbu

No sorry.

From a Highly Tuned Note 4.5!!!

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LoverTechnologies "Half Broken Things!"