megamannz123 Posted May 4, 2015 Report Posted May 4, 2015 Has anyone run boost through the factory 7k EFI. I'm wondering if it will cope with 10psi boost or will the factory ECU have issues and will an after market ECU be required (mega squirt) or something else? any success using factory set up with boost? Quote
LittleRedSpirit Posted May 4, 2015 Report Posted May 4, 2015 Not a lot of difference with boosted tuning except more fuel goes in and there needs to be a boost referenced timing retard table in the stock tuning or the ecu will have no way to retard the timing. Basically, its going to be a lot easier to get fairly dumb standalone to make it work, you can design the perfect timing curve and apply the boost based retard with most basic computers like microtec or whatever crap standalone is lying around. Quote
kickn5k Posted May 4, 2015 Report Posted May 4, 2015 Has anyone run boost through the factory 7k EFI. I'm wondering if it will cope with 10psi boost or will the factory ECU have issues and will an after market ECU be required (mega squirt) or something else? any success using factory set up with boost? Nope sure wont, no boost reference. Factory ECU's are like megasquirt and microtechs only good for bin fill! Don't skimp on an ECU thats what keeps your engine running. Quote
LittleRedSpirit Posted May 4, 2015 Report Posted May 4, 2015 7k isnt going to take the finest electronics to run. It really depends how far your ambitions for the build reach. A good investment is an e420d adaptronic as its one of the most easily transferred ecus. That said, if you just need something capable of running boost you don't have to spend a grand usually you cna find something that will work for less used. Quote
ke70dave Posted May 4, 2015 Report Posted May 4, 2015 Grab a haltech e8 if you can find one. I got mine for $200. Brilliant ecu for how much they are. Make sure you load on the latest firmware. don't stuff around with the factory computer. Grab a wide band o2 sensor and spend a long time learning to wire, setup and tune the ecu. Quote
megamannz123 Posted May 5, 2015 Author Report Posted May 5, 2015 Cheers for that! so the factory ECU is no good, I've been doing a bit of reading on Megasquirt and it looks like a great project, some people have great results and some not but it seem to be related to what your expectations are for a self build project ECU opposed to a complete wire up and go so to speak ECU. I like wires and soldering and making intricate electronics so I think it could be great! What about the factory injectors and sensors, I'm thinking a new MAP sensor and a wide band O2 will be required. Quote
LittleRedSpirit Posted May 5, 2015 Report Posted May 5, 2015 (edited) In my opinion to road tune a car nicely you need a very accurate speed sensor, and a very accurate wideband, and in reality, you may still find the dyno gives better results for the full throttle map. Once you have a w.o.t tune and some sort of response from zero throttle you can scale it and fill in the blanks, drive and log it and see how it goes. Work your rev limit up 500 revs at a time and plot a course if you want to be careful. Just go to a dyno first for an hour and get some basic set up, then its really easy to road tune. With your intention to run boost I say that adds a layer of complexity but its really just a matter of having an amply safe margin of error on the retard vs boost maps. With slightly higher end ecus you can control boost. I don't know what megasquirt offers with boost control. You might want to consider a knock sensor too. Edited May 5, 2015 by LittleRedSpirit Quote
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