Let the fun begin.
 

well finally took the plunge and bought megasquirt.

Its a MS-II with the V3.57 board. going to be running it in the focus along side the stock ecu with EDIS-4.

wish me luck nig nogs.

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Re: Let the fun begin.
 

ok, thats cool.

i so want megasquirt for my nova.

but i cant even afford a motor, so no go for me.

Re: Let the fun begin.
 

in to see how this goes. my M3 will be boosted before the end of the year and i plan to use MS. too bad its not as easy as my civic to run boosted

Re: Let the fun begin.
 

once you do some research you realize just how easy it is to install a megasquirt.

i might just me being cocky but it doest take that much to install one. then again, i have put one in yet so dont pay attention to me :)

Re: Let the fun begin.
 

My roomate is running a megasquirt on his supercharged miata. But he bought it as a plug'n play unit, hooked right up to the factory harness. Its not hard to tune..but its a little dumb.

I realllllly hate the fact that it reads in mbar only with no other option, and I could never get launch control to work at all, nor does he have a rev limit. It runs..but not nearly as well as my honda.

Re: Let the fun begin.
 

you know that the megasquirt will easily control the edis4, i think it is 1 wire. no need to complicate things with 2 ecu's

Re: Let the fun begin.
 

the reason for the 2nd ecu is because the stock ecu controls the fuel pump, its a returnless fuel system and the stock ecu regulates voltage according to fuel pressure.

Re: Let the fun begin.
 

why not make it a return type system? its not that hard.

Re: Let the fun begin.
 

eventually i will make a return sytle fuel system. but for now i want to get megasquirt running on a fuel system that i know works, i dont want to many variable that could go wrong on my first try at the megasquirt.

Re: Let the fun begin.
 

i think it would be harder to tune when the fuel pressure is ------- rollercoasting up and down, why not just make it a constant pressure and be done with it.

Re: Let the fun begin.
 

His fuel pressure rollercoasters up and down with a return line. Returnless systems have problems, but that isn't one of them.

He's fine without a return as long as he keeps the boost low.

Re: Let the fun begin.
 

for now im not planning on running more than 12psi. which i know the car can take since ive run it on 15psi. i just want to get the megasquirt to run properly and have a nice afr.

then the new engine is going in with the gm-8 and 25psi. 400hp and 375 ft/lbs, here i come.

Re: Let the fun begin.
 

Just remember that your fuel pressure @ the rail is going to be pump pressure minus intake manifold pressure.

Most returnless setups seem to run ~55 psi. So, you get more "differential" pressure between the 55 psi in the rail and the -6 psi in your intake during a part throttle cruise... effectively 61 psi of fuel pressure. When you boost it works the opposite... 55 psi rail pressure minus 12 psi of boost = 43 psi of differential pressure. As soon as you add in the return line, expect the tune to go lean at part throttle and rich under boost.

No big deal, just don't press the returnless setup too far.

Re: Let the fun begin.
 

i know that returnless system is limited, but ive been running it for over 3 years now with no explosive consequences so a little longer cant hurt.

Re: Let the fun begin.
 

congrats on the upgrade. what were you running for tuning before? from what i've seen, the management options for foci are overpriced, dealer/professional oriented, and shitty.

Re: Let the fun begin.
 

yup that pretty much sums it up, for a programmer just to flash the ecu it cost 400$ and you cant do any programming yourself. for the software to tune its an extra 350$. and any tuner that uses the sct software charges 300$ for a tune session.

Sct basically controls the focus market. but if i can get a harness made, and simplify the megasquirt process for the focus owners out their. its a fucken huge market.

Re: Let the fun begin.
 

Is your car still ugly like in the picture? And by ugly I don't mean the bondo... :8

I just wish MS had real sequential injection. I just don't like having fuel boiling on the valve for 2x longer than it has to be.

Re: Let the fun begin.
 

Sequential only matters for idle emissions. Everyone on this site is an emissions violator, so that can't be what you are getting at.

Porsche injects fuel between intake events to boil on the back of the valve face for cooling. As such, during engine operation, it is desireable. So, that can't be what you are getting at.

What are you getting at?

Re: Let the fun begin.
 

thats the only little think about megasquirt that it only has two injector banks. which would mean alot of wasted gas. becuase i still do kind of want some decent gas milage.

Re: Let the fun begin.
 

Then don't sit in parking lots idling for long periods, because I assure you gain vs sequential injection isn't a significant differece once you are rolling. Mustang 5.0 got 30-32 mpg on the highway, thanks to the fact there's nothing wrong with non-sequential injection.

I havesome harsh criticisms of MS, but that isn't a blip on my radar.

Re: Let the fun begin.
 

Never thought of it that way but it makes perfect sense.

Re: Let the fun begin.
 

any update on this POS?

Re: Let the fun begin.
 

MS is awesome

and its good to read more about


toobad it cant controll my VVTI so its useless for me :-(