3.3 Turbo CIS to EFI-What else I need?

[sjf911]

Plenty of people on the MS boards using modified distributors for cam synch whether single tooth or half moon. You can even do both crank and cam with a distributor.

[Lapkritis]

Yep, very common to get sequential fuel control instead of bank/batch. MS3 has a fine trim percentage table for each individual fuel injector though that you can control without the cam sync. Unless you're racing competitively and/or looking for optimized fuel economy it's arguable how beneficial adding that cam sensor is...

-Andrew

[balleta]

Originally Posted by Lapkritis

Yep, very common to get sequential fuel control instead of bank/batch. MS3 has a fine trim percentage table for each individual fuel injector though that you can control without the cam sync. Unless you're racing competitively and/or looking for optimized fuel economy it's arguable how beneficial adding that cam sensor is...

-Andrew

Now I'm really confused

[Lapkritis]

Sequential fuel is 1 fuel injector squirting at a time.

Bank is half of the fuel injectors squirting at the same time.

Batch is all fuel injectors squirting at the same time.

The can sensor isn't needed for bank/batch but is required for sequential. There is a slight improvement in emissions/fuel economy with sequential as you don't have fuel pooling/sticking to the walls when pumped into the intake port at a sub-optimal moment. Sequential will also allow fuel injector timing control... about as advanced as you would like to get. Probably only useful if you have wideband and EGT sensing on each individual cylinder for tuning each individually. This is the level of tuning an OEM would do in a lab for a few thousand hours before releasing an engine/tune for the general public in a production vehicle... or that a serious race team would do to address hardware failures that could be solved with tuning on cylinders prone to quit first.

[xbmwguy]

steve you couldd not be more spot on. a simple ms2 can be the most basic way to tune ignition, fuel yet it can keep going to almost endless capabilities with ms3 (which both darin and i are thinking of doing) but i still have not taken ms2 to its fullest potential. cop and sequential is in my near future

[Ken911]

Originally Posted by balleta

Now I'm really confused

main reason for sequential injection is if you have a high horsepower engine that needs huge injectors (like with e-85) it is hard to make it idle well or run around town without running really rich. with sequential injection you can run really large injectors with horsepower to match and still have a drivable car the rest of the time.

[Lapkritis]

Originally Posted by Ken911

main reason for sequential injection is if you have a high horsepower engine that needs huge injectors (like with e-85) it is hard to make it idle well or run around town without running really rich. with sequential injection you can run really large injectors with horsepower to match and still have a drivable car the rest of the time.

That is how I would describe staged injection.

-Andrew

[xbmwguy]

i am running 80# siemans on e-85 non sequential and at full boost at 6k have afrs around 10. idles perfect at 900-925

[Lapkritis]

My vr6 is on Ms2 currently(Ms3 waiting in a box) with 60lbs injectors and a1000 full matching system. I could probably join you with the 80lbs injectors but I'm not maxing the 60lbs injectors at quite 28lbs of boost...
The Siemens deka are the choice bit.

-Andrew