Here is the link to my megasquirt web site. It has all of my files available for download as well as my thoughts on the project. I would be willing to help anyone else contemplating installing Megasquirt on their 914. Included is an offer to burn code onto blank chips
Here's the web site
http://www.geocities.com/dnhunt2002/Dave914.html?1054739433412
Here is my email address
davehunt914@hotmail.com
Dave
Very nice! Thanks for sharing all your hard-earned knowledge.
Wow... Great work, Dave. I haven't ever considered doing such a change mostly because I didn't know how.
I think this is an excellent resource!
-Rusty
Hey Dave,
go ahead, and add it to the "links thread" that Lawrence just started
cheers,
Jeroen
Could a Type 1 be retrofitted to this system?
Stupid question,...What is the cost of the MS? I would like to get away from D-Jet, but don't have a idea how to do so. Carbs are out of the question.
Steve it is on the web site. It will cost more than you think because of Dirk wright disease.
Dave
I'm getting the SDS system for my teen so I should be able to offer a bit of a comparison between the DIY Megasquirt and the commercial SDS system very soon.
One of my biggest concerns about the MS was the time from beginning to end of the project, as time is one thing I don't have much of right now. Dave's info sure will save a lot of head scratching, but how long do you think it would take the average Joe to build/install/program the MS?
As for the SDS price, with the group buy's (it's over) 20% discount, my system cost me $1600 Canadian, so thats (I guess) about $1150 USD.
I also got the crank-fire programable ignition option (MS doesn't) so if you took the ignition out of the equation, my system woud have cost about $850 USD. This includes the TPS, MPS, wiring and a fuel pump relay.
Don't get me wrong, I think what Dave has done here is great and I hope others follow in his footsteps.
I may be still in the market next year for a MS system for my VW Squareback. If I have the time.
here comes that first big drop on the rollercoaster. dwd, might as well clean the firewall up before intalling the box. then it all goes crazy. not btdt, am there, still doing as opposed to done that.
kevin
You got that car running yet?
Geoff
engine spins, carbs on after the wife goes to work. a little gas, and we'll know today. update tonight.
kevin
I built my MS box in just a few hours...I then spent a few more hours hunting down new N4401 diodes since I installed mine backwards and fried them
What I liked about building, testing and installing the MS was that I learned a bunch of stuff that I more than likely would not have been exposed to. Sure I am not an EE now, but I feel a lot more comfortable working and trouble shooting electrical components.....
You learn nothing if the install and operation goes smoothly.
For me, the hardest part of my MS install was building the wiring harness.
>I built my MS box in just a few hours...I then spent a few more hours >hunting down new N4401 diodes since I installed mine backwards and fried >them
My low point came while troubleshooting my crankfire and I accidentally swapped leads and fried a Bosch 008 series variable-dwell ignition amp.
>What I liked about building, testing and installing the MS was that I learned >a bunch of stuff that I more than likely would not have been exposed to.
This is EXACTLY how I felt about my PEFI project. Even though I didn't have to build my board I still had to study and learn a lot to get it working. (Had to build transisorzied circuits to make crank signal and ignition work correctly for example). It was totally new to me and really racked my brain at times, but it was very rewarding in the end.
>You learn nothing if the install and operation goes smoothly.
Luckily I don't think that's likely to happen to anyone. he he. Well, at least not the first time. I look forward to my next PEFI install because I can list dozens of mistakes I plan to avoid (although I'm sure I'll discover new ones).
>For me, the hardest part of my MS install was building the wiring harness.
Amen. You start out thinking "Oh, I just have to wire up a couple of sensors. Piece of cake.", but you soon find it's a whole lot more complicated than that.
If Bowlsby (sp? sorry Jeff) starts selling a plug-n-play MS harness you could shave probably 80% of the time off of a MS conversion project by buying one.
-Ben M.
Ben
I'm really interested in your crank mount tigger wheel. Can you supply any details?
As to my and your comment about DWD, I was referring to repairs or changes that HAD to be done to install my Megasquirt. Cracks in old fuel lines, bent pintel on one injector, etc. Is there a term for the things you want to do.? How about TOD disease(temptation of the Devil) or WAD disease (Want a Divorce). Now that I can fuel a ticked out engine, I want to build one. What about brakes, suspension, etc. Talk about a dangerous bug. I never considered these temptations before I started down this path.
Mark
How do you plan to tune this system. I used a wide band O2 sensor on the road to get close then finallized it with a chassis dyno. Lots of fun, and it works well but that was about $400 for parts and dyno time.
Dave
Oh boy. I opened my mouth about the crank sensor. I guess it's put up or shut up, eh? Ok, here's the deal...
When I initially installed the PEFI my cranks sensor setup didn't work out so I bagged it and put a Crane optical sensor in a locked distributor. Works great.
What I'm trying to do now: I re-evaluated my original crank trigger design and made some improvements (I hope). I will test it tonight/tomorrow to see if it works. If it doesn't I'll fall back to using the Crane sensor in the dizzy.
Description:
I have mounted small round magnets (the type you can buy from SDS) in the lip of the cooling fan pulley. I did this by drilling holes in the lip and mounting the magnets in epoxy. Centered directly at the botom of the fan shroud I have mounted a dual hall sensor. It sticks up thorugh a notch cut in the cooling tin and hovers over the lip of the cooling fan pulley.
Some of you may have seen pictures of this setup I posted in '91 or '92. I've refined it a little but it's mostly the same. I believe that the problem I was having with this setup before was actually an unrelated problem I solved after abandoning the crank trigger setup. So I'm going to give it another go.
-Ben M.
Ben, so you’re back to the fan! I thought that it wobbled at high RPM or something?
The fan sure would be the easiest mounting spot for my trigger, the SDS sensor (housing) is quite wide.
Dave, I have a lambda (narrow band?) Haltech AF-30 air/fuel ratio meter, very similar to the unit that SDS sells. I've heard some of the debate between this type of unit and the wide band type. I do have a lot of VW aircooled (beetle) experience tuning carbs with it, my plugs always look perfect and I have never burnt (leaned out) up an engine using it. So I guess I'll just give it a go and see what happens.
One thing that the SDS system has is a rich/lean fine adjustment knob I'll see how much play is in this function.
As for dyno time we'll see. If it runs good I doubt if I would dyno this engine, it's a 1.8 and I wouldn't even care if I smoked it. When I build the big T4 (DWD big time) it will see some dyno time for sure.
The SDS sales hype says that "the SDS is the easiest EFI system to program on the market, period!"
Well, I will be putting that claim to the test very shortly.
Well one thing to SDS’s word, I just checked my email, they are shipping the first two orders today!
I only sent in the group buy order on Monday and they received the order yesterday afternoon.
I realize that they have most stuff on the shelf, but that is still pretty fast in my book.
P.S. I'm drooling like Homer J. Simpson!
Mmmmm.... fuel injection...
Yeah, back to the fan. I think what I interpreted as fan wobble was interference on the signal wire. After switching to the optical sensor in the dizzy I had simmilar symtoms that I was able to cure by shielding the leads. I'm going to wire it up so I can just unplug the optical sensor and plug in the crank sensor. If it doesn't work I'll just swap the plug back and life goes on.
-Ben M.
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