Surrey Dave
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| posted on 22/7/05 at 10:49 PM |
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Megajolt Map Bins
I have my megajolt connected to my laptop if i do nothing the map reading is 100 , if I suck on the MAP sensor connection it goes down to around 70 ,
is that correct?
I thought I would get a higher figure for more vacuum............
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GeoffT
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| posted on 22/7/05 at 11:11 PM |
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That's dead right Dave, atmospheric is 100 Kpa (whatever the **** Kpa's are) full vac is 0 Kpa. Had me wondering at first.
Why's it so difficult to type when you're p!ssed??
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Surrey Dave
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| posted on 22/7/05 at 11:18 PM |
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So if my runtime display gives me 100 no vac and 56 full vac how will that relate to my map bins on the config file?
Do you take the low from the high to give for instance 44 total spread and divide in 10 equal bin values.
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GeoffT
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| posted on 22/7/05 at 11:31 PM |
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I *think* the lowest (ie highest vac) Kpa you're likely to achieve is around 55-60. Use this value as your low bin (I used 50), ranging up to
100Kpa, and do even spread between these two figures for the intermediate bins.
[Edited on 22/7/05 by GeoffT]
[Edited on 22/7/05 by GeoffT]
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Jonr
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| posted on 23/7/05 at 09:15 AM |
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kPa = Kilopascals = 1000 pascals
pascals are the SI unit of pressure - one newton acting on one square metre
god thats geeky for Saturday morning!
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Surrey Dave
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| posted on 23/7/05 at 10:16 AM |
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From the megajolt website , I see that 100kpa should be the map reading for normal atmosphere, therfore I 'm guessing that whereas the bin
nubers increase for throttle position sensor , they must start at 100 kpa and decrease in 10 steps until you reach what ever your maximum vacuum is (
say 50 kpa)
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Surrey Dave
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| posted on 23/7/05 at 02:02 PM |
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SUCCESS!!!
SUCCESS.......
got my unit running on a 12v psu , connected to laptop via serial cable...........
Then used the instructions from Megajolt Website ... worked 1st time.......... the only thing i changed was the name of the firmware file to 301.s19
to avoid possible errors and make it easier to remember........
Megajolt site says" Open a command prompt. At the prompt enter:
> hc08sprg COM1 mjlJunior-3.0.0-beta.s19
(replace the mjlJunior-xxxxxxx.s19 file with the name of the .s19 file you just downloaded).
Replace COM1 with whatever com port you normally use.
The message on the screen will indicating that it's waiting for you to power up the unit. You can now apply power. The bootloader will then ask
for confirmation; when you are ready, enter 'Y'. The new firmware will be written. "
My command line was:
c:\megajolt> hc08sprg COM1 301.s19
have written a basic 2d map to get me running.......
THIS HAS NOW BEEN POSTED IN THE CORRECT PLACE :
http://www.locostbuilders.co.uk/viewthread.php?tid=29070&page=2
[Edited on 23/7/05 by Surrey Dave]
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Deckman001
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| posted on 23/7/05 at 02:12 PM |
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One day I'll work out what you are all talking about !!
Jason
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theconrodkid
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| posted on 23/7/05 at 02:17 PM |
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hm sounds like jibberish to moi as well
who cares who wins
pass the pork pies
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GeoffT
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| posted on 23/7/05 at 03:55 PM |
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Well done Dave! Now you've worked out how to do it I'll have a go at upgrading mine
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big_wasa
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| posted on 23/7/05 at 06:57 PM |
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For anybody that hates computers there is an all in one installer.
Its as easy as buying a game It worked for me first time on the laptop and the desktop..
Suck as hard as I could I could only get the kpa down to 60.
Are there any books/websites that explain ignition advance.
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