'808 high speed comms mod

Ecu Hardware Modifications
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'808 high speed comms mod

Postby antus » Mon Jul 13, 2009 11:05 pm

Here are the points to connect a max232 to your '808 to provide 'no echo' type comms at 8192 baud
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delco_808_comms_mod.jpg
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Re: '808 high speed comms mod

Postby Holden202T » Tue Jul 14, 2009 8:23 am

you need some capacitors between some of the max232 pins also though don't you ?

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Re: '808 high speed comms mod

Postby antus » Tue Jul 14, 2009 8:37 am

Yes, you need the whole typical standard max232 circuit. You could use the variant that has built in capacitors too. Thats left an an exercise for the reader :)
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: '808 high speed comms mod

Postby jacomms » Tue Jul 14, 2009 8:51 pm

have a look at the data sheet for the MAX233......

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Re: '808 high speed comms mod

Postby Apples » Fri Aug 21, 2009 7:50 pm

I have been looking for a simple cable to work thats usb.
found the following but what does TTL level 3.3 volt or 5volt have to do with it.
here is the links.

http://www.dontronics-shop.com/ftdi-usb-to-serial-ttl-level-33v-converter-cable.html

http://www.dontronics-shop.com/ftdi-usb-to-serial-ttl-level-5v-converter-cable.html

I am thinking of trying the 5v but better to ask dumb question than fry a ecm / pcm
Don't make excuses. Make more horsepower.

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Re: '808 high speed comms mod

Postby antus » Wed Sep 16, 2009 2:47 pm

I split the eprom reading/writing thread out of here and created a new subforum for it. The new thread is here
viewtopic.php?f=33&t=255
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: '808 high speed comms mod

Postby vn5000 » Sat Sep 26, 2009 9:26 pm

If anyones interested i just found a way to get an echo on the above hi speed mod.You just need one diode and a 1k resister.Just hooked it up to my 808 and tunerpro worked fine and so did vl400s flash tool,whereas before i could only use scannerpro. :director:

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Re: '808 high speed comms mod

Postby djbrooksy » Sun Sep 27, 2009 8:52 am

:punk: sounds to good to be ture
got any pic's or diagrams

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Re: '808 high speed comms mod

Postby vn5000 » Sun Sep 27, 2009 10:18 am

Its only a simple diagram i drew in ms paint but its all you should need.
808 hi speed  echo mod.JPG
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Re: '808 high speed comms mod

Postby Holden202T » Mon Sep 28, 2009 10:34 am

interesting, so this is a link between pin 11 and 12 on the max232 i am guessing ?

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