installed my MegaSquirt this weekend, driving impressions

[Josiah]

well, as it says I installed the megasquirt this weekend....and oh is it so much better than the RRFPR/AOBE setup I was using before, the transition into boost no longer feels like I'm being kicked in the head, nice smooth and powerful, fully adjustable fuel control(will add spark control in a couple weeks) a full standalone for the cost of a SAFC, I give the MegaSquirt 2 thumbs up, its drives like stock....or what stock would be if they made a stock 1st gen turbo, love the seamless transition into boost, and I love the fact that it has a built in electronic boost controller....going to make a circuit for it and use it later

[cali]

so how are you controllign spark right now?

[Josiah]

the stock computer is still doing that, I just clipped the stock injector grounds and ran them to MS instead, so the stock computer thinks its controlling fuel still as well, when it now has nothing to do with fuel, a few wires and I'll have spark control as well, but I want fuel nailed down first

[cali]

k, gotcha.

[Josiah]

now to tune it....harder than it seems, running rich on a map meant for 770 cc injectors, speaking of tuning...I think I'll go tune some now....

[power2weight]

Deffinatly interested in how this goes. Good luck and keep us updated.

[Josiah]

well, after a couple days of tuning the car just keeps getting better, havent even installed the spark side of things yet either, and the nice thing is I can switch between a map for fuel economy or one for power with a couple mouse clicks....in realtime

[cali]

What does the tuning interface look like? What lang is the code in?

[Josiah]

the interface is a visual windows map, the tuning program itself is open source c, the actual firmware on the computer is written in assembly for speed....

[Josiah]

well, it seems my car likes 50psi fuel pressure, I'm almost back to as fast I was before the install, my main problem seems to be the fact its hard to tune by yourself with just a datalog to go by, I really need to find someone to drive me around while I tune, that and the fact that with no 1:1 regulator(do have a RRFPR but its vacuum refrence is disconnected since I dont want to throw off my fuel map) as soon as I go into boost my fuel pressure drops by that same amount which doesnt matter too much because I am still rich as hell at anything other than idle or cruise, mainly due to the lack of a wideband o2 sensor to tune with, my narrowband helps, but its really not enough, anyone want to let me borrow a wideband for a few hours?

[I-MarkRs]

Please post pics of your megasquirt install including wiring!

[Josiah]

well, i didnt take any durring the install, and right now my wiring looks more like a rats nest than anything else, not exactly sure what you're wanting to see of it in particular, I have a limited amount of pictures and no digital camera, for the MS unit itself, its just kinda bolted to the side of my console

P.S. since I originally posted this I have swapped to the SRT-4 engine and EDIS-4 for spark control

[HPNOTIQracing]

hey josiah. im getting one for this project im working on any expirence with the na install?

[2.4TNeoN]

hey josiah im curious to see which wires you splice into... im amlost at your step lol im right behind you.. im having problems on finding which wires to splice into.. im using the Haynes manual and its not that explanitory.. let me know.. thanks

[Josiah]

hypnotiq, NA install is the same as turbo, you just dont go above 100kpa with your fuel is all, and the base map calculator is a lot more accurate NA, 2.4T...heh, already helping you on floridaneons.org, I'm wicked93gs over there, the map wire you are looking to spice into is dark green/red pin 36 at the computer if you choose to tap into it there rather than down by the map sensor(which does make for a cleaner install) are there any other wires you're having trouble with? heres a thread which might help you a bit http://forums.neons.org/viewtopic.php?t=205510&postdays=0&postorder=asc&start=0 it even has pictures of which wires to splice I believe...though they arent real helpful