MegaSquirt Engine Management Systems

FoundSoul

Fresh Recruit
haha says it all!!

That was last year, we were back on the salt last month and went 249mph, using the same ECU. Minor problem though... we lost oil pressure on the second run at 235+mph and one of the turbos exploded so we weren't able to back up our qualifying run and didn't step the record up.

Root cause-- when pulling the car off the trailer it had bottomed out pushing the oil pan up into the pickup restricting oil flow at high RPM. We've corrected this with a proper skidplate so it won't happen again, but it killed us this year.
 

Sheldon

Malta Area Rep.
That was last year, we were back on the salt last month and went 249mph, using the same ECU. Minor problem though... we lost oil pressure on the second run at 235+mph and one of the turbos exploded so we weren't able to back up our qualifying run and didn't step the record up.

Root cause-- when pulling the car off the trailer it had bottomed out pushing the oil pan up into the pickup restricting oil flow at high RPM. We've corrected this with a proper skidplate so it won't happen again, but it killed us this year.

ahh the joy of motorsport!
 

FoundSoul

Fresh Recruit
1 more question,

how many tuning points are there on these units?

20x20 or 32x32 etc etc etc


Sorry I missed this earlier Ricky. 16x16. We've discussed adding more, it's not a hardware limitation, we've just found it's not needed. All rows/columns are linearly interpolated across from one to another for a smooth transition, and you can setup your tables putting more resolution where you might need it. (Down at low throttle openings on a IRTB motor for example). More cells to tune are just that, more to tune, more time spent on the dyno. Most tuners, when tuning systems with large numbers of cells, will tune only every other row/column and then average between the two anyways. And, well, our hardware/firmware does that for you automatically with linear interpolation. You tune every row, but not an endless number of unneeded rows. Just what's needed, and we fill in the blanks linearly. Works like a champ and saves you dyno time.
 

azerty

Supermoderator
this is becoming interresting :)
I might have to read a bit more on this side; this DIYPNPN76-K kit seems very promissing for our starlet turbo

BTW, would this support ALS ?
 
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Matt Cramer

Fresh Recruit
I'm Matt, one of the tech guys FoundSoul mentioned earlier...

Seems we find our man here bro.
Personaly i have read the megamanual from cover to cover a lot of times (more than 2) and also visit msefi.com from time to time.
My personal problem is about controling ignition and how to. (how to conect,how to take the trigger signal,and general wiring and what code do i need to use/load.)
I am the kind of person who can follow schematics but schematics for our distirbutor and our double pick up dont seem to exist.

These use a Nippondenso dual wheel system. It isn't easy to use with Bowling & Grippo code, but the MS2/Extra code can handle it no problem. There's a specific page in the MS2/Extra manual on wiring up a Nippondenso ignition that covers many of the key points, although it is missing what output to use to drive the coil. You can either use a built in ignition module or puzzle out what signal the ignitor needs. Unfortunately the ignitor one is a bit more of a puzzle, but it probably just needs a 5 volt signal.

There are some guys with ms-i but not match of help because of the differences of the system.

It's pretty similar as far as hardware and wiring goes, though one or two pins are different. Settings are totally different though.

BTW, would this support ALS ?

Depends on what sort of anti-lag you are looking for. There's a flat shift option in the current MS2/Extra code that can cut spark when you shift while leaving the injectors on. There are some other versions of anti-lag the current code doesn't do, although it's possible one may be available down the road as a simple firmware update.
 

azerty

Supermoderator
Hello Matt Cramer, welcome onboard :)

I meant ALS you usualy find in rally cars. wich would keep turbo boosting when you are off throttle or changing gear (air solenoid bypass with retarded timing). so when you press throttle again you don't encounter turbo lag.
 

Toyota T23

Member +
I just testet FLAT SHIFT yesterday, the boost gauge was on exatly 1,2 bar all through gears, it didnt even move 1mm, looked cool...

We have switch on clutch, works great, :cool: and sounded like a rally car with big BANG when shifting gear, we had great fun
 

Sheldon

Malta Area Rep.
il have to wait for someone that wil MS his ep91 and then will do mine if he's willing to help. as i cant stay without the car much
 
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