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RWDboy
Forums Junkie

Location:
South Australia
Registered:
July 2002

Re: EOI : ST162 Owners! Group Buy - MegaSquirt ECU

Sun, 24 April 2005 01:35

Quote:

will this be a direct replacement for the stock ecu? as in pull out the plug of the old ecu and put it in the new one?

Yes I will be designing this to be a direct swap. Some things that I will have to check though is compatibility with cruise control and automatics. My car has neither so I will probably use a friends car or two but it should be okay.

Quote:

what sort of fuel will you be tuning this for?

I will tune it for 91 octane unleaded, but as it is a fully programmable and tuneable ECU you will be able to use software supplied and a laptop/computer to make any alterations to the fuel or ignition map that you like.

Quote:

what are the expected gains over a stock ecu?

Programmability, flexibility, improved correction factor calculation. This basically means the engine will produce better and smoother torque across all operating conditions. Gaining power is usually done by either leaning out the mixture or advancing the timing, whether you choose to take those risks will be up to you if you decide to tune the ECU later on. I will personally tune them modestly to begin with to avoid any risk or harm to the engine. I will post a dyno sheet of before and after results on the same engine (a recently rebuilt one) so as to provide a guide as to what gains you can immediately expect.

Quote:

i have a gen 2 3sge but its using a gen 1 intake manifold and ecu... what difference if any would this make?

The gen 2 engine runs higher compression and has significantly different port design. I would HIGHLY recommend getting a new ECU for your car (ie my MegaSquirt Wink

) as your current ECU is not optimised in any way for the different head and port layout and cam profile. A programmable and tuneable ECU will be able to take better advantage of your engine's different flow characteristics, essentially you will see a very very noticeable *gain* in performance.

Your's is a case in point of why I don't like the standard ECU, because it's essentially hard wired and any significant changes to the engine tend to not make as good power as they should because the ECU just doesn't take advantage of it.

Quote:

HI man I am an St162 owner and would be interested in this. However I am more than likely swapping in a GTE so would have to look at the support that there is for these motors on megasquirts site. Will look into it for sure

Cheers,

sounds like a great idea.

I personally just use a dizzy twist and some AFM tweaks but hey all electronic is all good

The reason I'm going dizzy-less twin coil pack waste-spark ignition is because I'm turning the engine N-S and firewall clearance is an issue Very Happy

It may be too much work for me to add in support for factory-esque 3S-GTEs - if you ever happen to be interested in a dizzy-less 3S-GTE and want to know more about what I (have yet to) do then gimme a buzz. If you are still interested in this group buy though then you'll only spend maybe $100 extra and you'll have a nicely working 3S-GE to tide you over until you get the turbo Confused

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