Convert V6 Netres To V8

Ecu Hardware Modifications
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delcowizzid
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Re: Convert V6 Netres To V8

Post by delcowizzid »

found this during the week might give some insight to how the networks joint together inside of some memcals at least
MEMCAL-ECM.pdf
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Re: Convert V6 Netres To V8

Post by antus »

Knowing how the resistors are mapped internally would make it possible to measure all the values in a standard netres by measuring between the right 2 points at the end of each of them. Good stuff :)
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delcowizzid
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Re: Convert V6 Netres To V8

Post by delcowizzid »

Need to make up one of them memcal boards with resistor pads could fill it with variable resistors and tune limp mode or even run low rpm stationary engines with no tune lol
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Re: Convert V6 Netres To V8

Post by Holden202T »

I have one of them from crow cams for a V8, never really done much with it but it has heaps of resistors on it!
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Re: Convert V6 Netres To V8

Post by Dave001 »

V6-V8%20RESISTOR%20MOD.JPG
V6-V8%20RESISTOR%20MOD.JPG (324.69 KiB) Viewed 8850 times
Isn't the above incorrect? Cutting pin 13 will give you 22.5k at pin 12.
netres.jpg
netres.jpg (23.93 KiB) Viewed 8850 times
Cutting pin 12, will give you the 7.5k between pin 3 (ground) and pin 13.

Edit:
I think I miss understood the original post. Pin 10 is a ground, so you'd need to add a 7.5k resistor between pin 10 and pin 13 going by the image.
But this will still give you 22.5k on pin 12, when I test a factory V8 memcal, it's open circuit between pin 3 and pin 12, so I think the correct way to do it would be to cut/lift pin 12.
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Re: Convert V6 Netres To V8

Post by VL400 »

The actual value is not critical, its just a voltage divider that the ECU hardware reads on pin 13. A V8 needs to read 0 volts, either via some value resistor to ground or just a jumper.

Cutting pin 13 and adding a ground link from pin 10 to 13 is one option, or just cut pin 12 if it was a V6 memcal converting to V8.

If you are using 12P it will tell you the memcal type once running so you can confirm it is working as expected.
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Re: Convert V6 Netres To V8

Post by MrWillys »

Must say that I'm a little proud of myself, and indebted to you gentlemen again. Today I took a 1994 TBI 5.7 memcal and cut pin 12, and then soldered a 7.5 ohm resistor across 3 to 13 and it worked. My thoughts are that the ESC unit should work for the $8D TPI that are both 5.7?
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Re: Convert V6 Netres To V8

Post by festy »

MrWillys wrote: My thoughts are that the ESC unit should work for the $8D TPI that are both 5.7?
Assuming the bore sizes are the same and ESC is enabled in your bin (and your memcal doesn't have a knock filter) - yes, the ESC box should work.
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Re: Convert V6 Netres To V8

Post by j_ds_au »

MrWillys wrote:Must say that I'm a little proud of myself, and indebted to you gentlemen again. Today I took a 1994 TBI 5.7 memcal and cut pin 12, and then soldered a 7.5 ohm resistor across 3 to 13 and it worked. My thoughts are that the ESC unit should work for the $8D TPI that are both 5.7?
If I've understood this correctly, your 7.5 ohm (should be 7.5k) resistor is redundant, but no problem, the job is done (for cylinder selection).

Joe.
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Re: Convert V6 Netres To V8

Post by MrWillys »

festy wrote:
MrWillys wrote: My thoughts are that the ESC unit should work for the $8D TPI that are both 5.7?
Assuming the bore sizes are the same and ESC is enabled in your bin (and your memcal doesn't have a knock filter) - yes, the ESC box should work.
Here in the US they built trucks with 5.7's and a 4" bore, but were TBI. The TPI's were all Camaro's and Corvette's with the same 4" bore 5.7. I still plan on running some datalogs to view operation of the ESC.
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