355gta

I hope this is the right forum. I have been looking at this here recently and was wondering if anyone has ever used this fuel management. I am building a twin turbo 355 and I have read alot about the MS II but never talked to anyone who has actually used it. If anyone has any input it would be greatly appreciated.

V6sucker

it's ok. it is pretty easy to use and has alot of support and people actually willing to give up the settings they are using.

I am considering replacing this factory ecm with one to make tuning a bit easier.

Thirim

the nice thing with megasquirt is that you can instantly make changes.. while you are driving.. (or someoen else driving lol)

ChevelleFan

iTrader: (4)

I run a MegaSquirt-II on my Chevelle. Like others have said, you can make tuning changes in real-time and immediately feel the result. If you have a friend drive while you tune, you can get a car pretty well tuned in about 20-30 minutes. You'll need a dragstrip or dyno to really dial-in the WOT stuff, though.

My MS-II replaced a Holley carb. I was never 'unhappy' with the Holley, but the part throttle response & overall drivability on the street is much better with the EFI.

-Dave

Dave Farr

will it control EGR?

ChevelleFan

iTrader: (4)

No.

DieKnow

We do real time with TunerCat also using the GM ecm.

Drac0nic

It doesn't control the EGR, but if you're not in a visual inspection area I wouldn't sweat it. I ran it on a 1989 4.3L TBI motor. I had to run a wire for the IAT, but that's not a big deal since chances are you have one already. I also had to run a wire from the fuse panel for the HEI. Other then that it's a stock harness. I just cut the harness, spliced in a piece of wire that was the same color I had from a spare harness, then wired that to the ECM. This way I could pull the ECM and have my stocker back in within 10-15 minutes (this is a daily driver) The reason I got a MS-II is I'm eventually wanting to run a forced induction combo. I decided that rather then buying tuning gear I'd go this way instead, I definitely think I made the right choice. I also have a background in electronics, albeit if you're patient and can read through instructions it should be of little trouble to get it running. It works well with GM hardware, I've been using a stock HEI system with mine.

gbodybilly

I'm setting up for MS2 using factory TPI and an 8-pin HEI and in the process of putting together the external wiring: MegaSquirt EFI :: View topic - Rough preliminary wiring diagram w/8-pin HEI and Stepper IAC

busta9876

MS II could control EGR, and EVAP as that goes. It's matter of configuring it's outputs with the right triggers. You can set a relay control for almost any sensor input you want.

I've put megasquirt on a few vehicles with great success.

Vortec 8.1L, Vortec 6.0L, LS1, all with MegaSquirt and EDIS ignition

TPI 305 Megasquirt II & MSD Distributor (spark control), test motor for learning MS II.

currently biulding a 489 big block chevy, will replace the TPI and use the MS II and ignition. Eventually plans are for 6-71 roots blower with efi, 8 injectors below blower for driveability, 8 more above when needed.

Nice thing with MS II is the accelration enrichment can be set to map mode. It will enrich with quick changes in MAP, (shifting into gear on an Automatic, etc)

Tunning is a breeze, there is even an auto tune function that will automatically tune the VE table as you drive!

With a wide band o2 sensor you can even use it to tune your entire fuel table, WOT included. You just set a target AFR for the MAP and RPM cell you want.

Can't beat it for the price.