What type of wire do I use to send an RPM signal to an MS2?
What terminal on the HEI?
What Pin # on the DB37?
What setings do I use in Tuner Studio?
I do not want to control the spark timing just tell MS how fast the engine is spinning.
Should be simple but I cannot find the answer on the forums or in the manual.
I have a 3.57 board.
Thanks.
GM HEI 4 Pin
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
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The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: GM HEI 4 Pin
Bzltyr,
Use the tach terminal (this is the same as using the coil negative terminal). On a four in module, this is pin 'C' (it is embossed on the module itself) which is also connected to the 'tach' terminal on the distributor cap. You connect that pin of the module to your MegaSquirt DB37 connector's pin #24.
Then set your number of cylinders in the software. Don't set anything for the missing tooth configuration, just leave it at the defaults. Then you will be ready to run.
There is more info on triggering when not controlling ignition here: http://www.megamanual.com/v22manual/mwire.htm#ignition
Lance.
Use the tach terminal (this is the same as using the coil negative terminal). On a four in module, this is pin 'C' (it is embossed on the module itself) which is also connected to the 'tach' terminal on the distributor cap. You connect that pin of the module to your MegaSquirt DB37 connector's pin #24.
Then set your number of cylinders in the software. Don't set anything for the missing tooth configuration, just leave it at the defaults. Then you will be ready to run.
There is more info on triggering when not controlling ignition here: http://www.megamanual.com/v22manual/mwire.htm#ignition
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
Re: GM HEI 4 Pin
Thank you Lance. Just any wire or a shielded wire? Ground the shileding?
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Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: GM HEI 4 Pin
Bzltyr,
I have run the 4-pin HEI (on a small block Chevy) as well as various 7-pin modules and I never found it necessary to shield the tach wire.
Lance.
I have run the 4-pin HEI (on a small block Chevy) as well as various 7-pin modules and I never found it necessary to shield the tach wire.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
Re: GM HEI 4 Pin
Thanks again. I will give it a shot.