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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Tue Oct 04, 2011 12:45 am Post subject: Type 3 engine Megasquirts-2 Conversion Project |
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Today i received my MS-2 kit and i have trigger wheels (supersuk) and COP in the mail.
My plan here is to detail my test engine conversion to MS-2 control.
Whilst i have a little experience with electronics from school i would consider myself to have little experience when it comes to the box of jelly beans that is MS.
Stay tuned this could get ugly. |
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supersuk Samba Member
Joined: December 20, 2010 Posts: 958 Location: Honolulu, Hawaii
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supaninja Samba Member
Joined: July 03, 2010 Posts: 4020 Location: houston
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Max Welton Samba Member
Joined: May 19, 2003 Posts: 10697 Location: Black Forest, CO
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Tue Oct 04, 2011 2:47 pm Post subject: |
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My test engine comes out of my 71-Notch. it has had a very hard life as is evident from the melted engine lid seal and even the boot seal
Last year I did my first engine rebuild on it (is it still an engine rebuild if dont put any new parts in it?) Anyway it is a 1835 (92mm pistons) according to the service dockets it was bored out in 1982 and had some funky oil filter and cooler added. (i took this off because i needed to pass a roadworthy test)
I drove it hard for 5000 miles, must of that was back and forth from the city to the country. (3 hour drives) I recently took the engine apart again to see what it looked.
cracked 3,4 head and i think a crack in the case. it was still going strong so im in the process of putting it back togeather with new cam followers.
With my MS im going to begin with ignition only because both my engines have carbs. i have a stock intake runner i got from a local vw guy but no hardware.
i figure the ignition is the most likely to blow up an engine so once i get that sorted i will add the fuel system. |
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supaninja Samba Member
Joined: July 03, 2010 Posts: 4020 Location: houston
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krusher Samba Member
Joined: September 24, 2002 Posts: 7652 Location: europe
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Posted: Wed Oct 05, 2011 12:39 am Post subject: |
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With just ignition its wont want much different/is any timing than the stock distributor curve, maybe a little less advance will be needed due to a stronger spark.
Where you can really get the benefit from the programmable ignition is when you go to FI, with the more much more precise control over fuel ratios from the FI the ignition can be dialed in to perfection as a combo.
I would check those 1835 barrels for roundness there the super thin ones and like to warp when over heated, I would replace them with a 1776 kit. _________________ (06:31:07) RoachGhia: "i drink dick way too fast" |
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Wed Oct 05, 2011 3:36 am Post subject: |
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Got started on the soldering today. i made the power circuit (i think) then i got the shakes so thought i should stop for tonite.
had a package on my doorstep when i got home tonite as well
ooooh that trigger wheel is super smooth. i love me some lazar cutting
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HenrikL Samba Member
Joined: October 31, 2005 Posts: 313 Location: Sweden
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Posted: Wed Oct 05, 2011 5:19 am Post subject: |
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I'm mostly a stock guy myself, but have always been a little interested in a Megasquirt conversion of a Type 3 engine. Will you use the stock Type 3 FI intake? |
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vdubin Samba Member
Joined: September 09, 2006 Posts: 305 Location: Huntsville, Al
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Posted: Wed Oct 05, 2011 10:37 am Post subject: |
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Here is what i know about MS... I have s 95 golf with an added turbo on ms1v3. Timing alone wont necessarilly kill the engine but it can lead to hot spots and pinging if your mix is on the lean side. Just be conservative on your timing and use all of your map. Set some timing a little high below your idle to help recover from a stumble. A good start would be 10-12 deg to start to about 28-30 at wot. You can set less timing at idle but a/c motors like a little more timing down low. I also like to set my idles at 950 to 1000 the off idle starts are a lot better and the milage lost is nothing significant. If you wire in your O2 sensor you can monitor your current mix and get an idea of what your engine is running like so you will have a general idea of a good starting mix. Keep your maps smooth...
Remember all grounds go to the motor and it is a good idea to add a second ground to the engine.
Pm me if you have any questions on ms. Supaninja knows a thing or two as well and if you talk nicely to him he might share his msq. Then you will have a ball park tune to play with as far as your ve and timing tables. |
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supersuk Samba Member
Joined: December 20, 2010 Posts: 958 Location: Honolulu, Hawaii
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Wed Oct 05, 2011 1:53 pm Post subject: |
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Thanks for all the advice and support guys, it's good to know there is plenty of help out there. actually looking at the posts on my thread i realize why the samba is so great. There are posts from people in Hawaii, USA, UK and Sweden all helping a clown from Australia. (and its only the first page)
good on ya samba !
P.S. i wish i got the stimulator |
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supaninja Samba Member
Joined: July 03, 2010 Posts: 4020 Location: houston
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Mon Oct 10, 2011 3:10 pm Post subject: |
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So i havnt got much done for a few days because homework has kept me snowed in.
Next week i should finish the MS off and begin mounting the trigger wheel.
I do have one confession to make though. i got distracted by the GF when soldering those tiny weeny transistors in and put 3 of them in the wrong way around ..... after a while and some disgusting language i got the cheeky littl buggers out.
To get them out i had to put a lot of heat into them though ... do you think that would have wrecked them? they look ok but i also had to hold them with pliers as there was no way i could hold them with my hand. |
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supaninja Samba Member
Joined: July 03, 2010 Posts: 4020 Location: houston
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Tue Oct 11, 2011 1:36 am Post subject: |
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Yeh Ninja i was talking about those tiny little transistors Q14,20 ect but i finished the board off today and tested some things with my multimeter and i think they are ok.
here is my board at the moment. I find the MS extra manuel is a bit slap dash. so i have a few questions to anyone who may know.
do i need to install a jumper (Link) across R43 (red circle)
Ms-extra manual tells me to link it but does not show it in the picture of the finished board
do i need to install the LED's (purple circle)
what happened to Q16 (green circle) (isnt this the ignition transistor?)
the ms-extra manual tells me to keep them safe but then doesn't say to install them.
On other news i got some more hardware today
i got a set of 4 of there from ebay for $100 they are new and appear to be well made (they are heavy and solid feeling)
i would really appreciate some input as im finding the ms manuals a little confusing,
other good news is that im getting my grandfathers CRT oscilloscope which should help for something? |
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supaninja Samba Member
Joined: July 03, 2010 Posts: 4020 Location: houston
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vdubin Samba Member
Joined: September 09, 2006 Posts: 305 Location: Huntsville, Al
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Posted: Tue Oct 11, 2011 6:40 pm Post subject: |
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yes, you need to jumper the resistor. most people place a substantial wire under the resistor so it will not be seen from above. also you do not need to install the LEDs. as the outputs from MSNSe take them over and you will just end up desolding them anyway. |
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Wed Oct 12, 2011 1:40 pm Post subject: |
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Thanks guys, That confirms my thinking, also i did a bit of searching on the net and found that people have done it that way and some in even stranger ways but it all seems to work. |
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Willo357 Samba Member
Joined: August 05, 2010 Posts: 483 Location: Melbourne
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Posted: Mon Nov 14, 2011 1:53 am Post subject: |
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Finally had some time for the engine.
Got the case all cleaned up today. ill be putting it back together tomorrow.
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