i decided on megasquirt but i want to know wether its worth the trouble of making your own computor, and what is the total cost, of all the necissary parts (for a good job, what should i order with it?)

i want the relay board, and basic kit, but do i need a flyback board?

 

The cost in money can't be beat. The cost in your time may be a wash. It depends on a number of things, really. I got one. It was $140 for the MS kit, and a another $40 or so for the stimulator kit (engine sensor simulator to test if your soldering of the MS PCB was correct). My MS kit total cost was probably around $188 or so. You have to be able to see half decently and also have adequate manual dexterity in order to solder smallish connections. Oh, it's a good idea to have a little background in soldering as well, but not completely necessary.

I chose to not get the relay board as I already had some relays kicking around for the fuel pump etc. I didn't need the flyback bord either because my engine already has high impedance fuel injectors.

As for the code, you could run the standard code that comes pre-loaded on the CPU, but it mainly depends on your setup. If you're simply replacing a GSL-SE or 2nd gen ECU with a MegaSquirt, you might want to consider one of the newer codes that allows staged injectors (to keep fuel from squirting from the secondary injectors of 2nd gen dual injector setups at low RPM) and other features. Since my setup is a stock EFI from a Cosmo, I chose to use a code that has staged injectors. I also have a dizzy until I can do a direct fire dual leading spark per rotor face ignition system. It'll take some coding and maybe a modifed CAS, but it's doable.

I had to put this EFI project on hold because I had some other more pressing issues closing in all around me. For instance, I had to put it on hold for a carb! Actually, several carbs! Boo hiss! I still have 4 or 5 carbs to deal with before I can get back into MegaSquirt. I bet by the time I'm done, there will be several new codes out there to try. Excellent advancements are happening very quickly in the MegaSquirt community.

 

when i eventually get around to building my streetport 13b turbo, i'll megasquirt it... because that way, by the time i actually get it working and tuned, i'll know exactly what i'm doing, and what is going on under there. That way i can solve my own problems.

plus, the cost cant be beat, just as fast and powerful as a haltech, but about a tenth the cost

 

i heard the only downside is lack of multipule program setting's, like u cant save setting's for different enviornmental situation's, other than that i would def go with the megasquirt

 

is it possible to change the boost you are running without changing your settings ie a laptop, ? im planning on using the setup on a 12a and was wondering how new an intake and throttle body will fit on a 12a with minimal modification, ie re drilling holes, blocking emmisions, or would i be better off to make my own manifold,

does the ms system come stock with a throttle position sensor or can you order that seperate with the relays?

 

You set the megasquirt to run with whatever TPS you can find pretty much.

 

From the conversation I've had with a member over on the msefi.com forum, going to megasquirt may actually pay for itself in reduced gas usage. He has a weber 50mm throttlebody and regularly gets better than 25 MPG, which is pretty awesome for even a stock engine. His is streetported, has full exhaust and dyno'd out at something like 165HP. So I'm going megasquirt over the winter and then hopefully with forced induction sometime before the summer.
Grant