Bosch LE2 Jetronic system - Uno Turbo

LuiG · Post by **LuiG** » Sat Jan 14, 2006 5:17 pm

Hey.

It is possible to use MS v2.2 instead of standart ECU in Fiat Uno 1.3 turbo (le2 jetronic...) ??

Anyone try to use MS with flap type air flow meter ?

It is possible? What should I use to emulate map sensor?

woh · Post by **woh** » Sat Jan 14, 2006 7:03 pm

LuiG

Megasquirt uses the manifold absolute pressure (MAP) instead of the Bosch Air Flow meter. This is simply a vacuum hose connection from the manifold to the Megasquirt ECU.

You will have everything else you need from the L-Jetronic except an air temperature sensor (that is usually in the Air Flow meter). So you simply add that somewhere at the intake. You can initially run the megasquirt with the Bosch system in place and switch between them. Once the megasquirt works to your satisfaction you can remove the Air flow meter and the Bosch ECU.

I recommend you go with the MS 1 v3.0 so you can take advantage of some of the features and updates.

LuiG · Post by **LuiG** » Sun Jan 15, 2006 2:55 am

i'm preparing uno to race in historic hill climb events.

I know that is simple (and better) to change old flap type maf to map sensor but is forbidden by homologation....

use MS instead of standart ECU is the only way... (stock ecu control only fuel)

if it is impossible or too complicated to do this, i'll try to do something with standart ecu....

Olsen · Post by **Olsen** » Sun Jan 15, 2006 3:34 am

If your uno has the original turbo its safe pÃ¥ set the boost at 0.9 bar, no more than that. Over 0.9 bar boost the original ecu can not giv more fuel.

At 0.9 bar boost you have about 130-140 hp.

schmidt · Post by **schmidt** » Sun Jan 15, 2006 4:35 am

Can you use piggyback systems on hill climb events ?

Perhaps you can use MS as a piggyback and controlling ignition... Or it's also forbidden?

Cheers

daniel505gti · Post by **daniel505gti** » Sun Jan 15, 2006 7:28 am

I have a 505 gti on mega squirt v3 with great success.
All i did was use the existing engine loom and sensors.
Spliced the looms above the engine connector harness.
The airflow meter was already broken so i span the spring around to keep the vein open all the time, tapped into the airflow for the inlet air, and replaced the 2 position TPS with a generic one.

The car runs so much smoother that the difference is quite remarkable.
And the best bit. looks so close to oem.

Hope this helps.
Daniel

woh · Post by **woh** » Sun Jan 15, 2006 8:54 am

The Air Flow Meter has a 7V logorithmic output that is not supported by Megasquirt.

MegaScott · Post by **MegaScott** » Sun Jan 15, 2006 11:27 am

I know some of these rules require you to use a "stock appearing" ECU, that has lead some to put the Megasquirt into the stock ECU case, meeting the letter of the rule, and allowing you to tune your engine with Megasquirt, or other aftermarket ECU guts. Sure, you may still have to keep your AFM but it just has to appear to be stock, you could gut it out and leave it installed.

LuiG · Post by **LuiG** » Thu Jan 19, 2006 12:21 pm

i think piggyback are allowed

air mesure device must be AFM type, not MAP

it could be another AFM,
what AFM work with MS??

schmidt · Post by **schmidt** » Wed Mar 01, 2006 6:21 pm

LuiG wrote:i think piggyback are allowed

air mesure device must be AFM type, not MAP

it could be another AFM,
what AFM work with MS??

Yeap, it's possible to run with MAF with MSnS-Extra !

Take a look in http://megasquirt.sourceforge.net/extra/MAF_Stuff.htm

Good luck !