alstare84

Hi to all,
I have a couple of question about my ESL ecu that I have into my Impreza V4 and I'm not able to solve/understand.
- IAT ---> given this datasheet http://www.bosch-motorsport.com/medi...2650379pdf.pdf how I should set the parameters into ESL? I cannot sort out "Do the difference or gradient first, offset second." . Maybe it's an easy answer but I'm getting crazy...
- Solenoid ---> Mine OEM 2 ports is starting to have some issue so I was lookig to replace with a Pierburg one but I kindly ask which model I can use and how to adjust the "MAP sensor" values. For the min and max boost duty map I understood that a 30% less values than now can be a good starting point (obviously need a double check with boost gauge, AFR, etc..). I wrote to Andy and he suggested me the OEM one but the original ones are too much pricey in my opinion.

If you need more details just ask and thanks in advance.

Roberto

PS car was already mapped mafless by a tuner last year but for personal knowledge I like to understand the map process and be able to improve or adjust the map if needed.

Luigi Noschese

Check this post, i had the same question
https://www.scoobynet.com/engine-man...l#post11832471

alstare84

Thanks a lot! I was not able to find
Since you have the same like me do you have already the values?

And about the solenoid someone has an idea?

Thanks and regards

Roberto

bludgod

iTrader: (3)

you can use any solenoid really, start with a 30% reduction in the min/max duty tables then increase them until your hitting boost target again.

alstare84

But in this way I don't loose the proper calibration of the data logger "manifold pressure bar"?

Thanks

Roberto

bludgod

iTrader: (3)

changing the boost solenoid has nothing to do with the manifold pressure sensor, they are two different sensors - I don't understand?

alstare84

You explained to me what was my mistake... I was thinking that the solenoid was also telling the ECU about the manifold pressure.

Thanks a lot

Roberto

alstare84

The restrictor pill need to be removed when moving from 2 to 3 port?
I read that someone is keeping but I'd like to understand what's wrong removing it.

Thanks again

Roberto

The Rig

iTrader: (13)

If you remove the restrictor pill you wont reach more than actuator pressure

ben.harris

iTrader: (2)

On a 2-port, that's true, but I think it's different for a 3-port. I still haven't fitted mine yet, but I'm under the impression that the restrictor pill moves and isn't actually required on the 3-port at all as the pipe it moves to is the one which people often leave disconnected.

Diagrams of the two systems here: http://www.scoobypedia.co.uk/index.p...tedIssues#toc4

EDIT - That Scoobypedia article has a good description of what the restrictor is actually doing in both a 2-port and 3-port setup.

alstare84

For what I can understand, can be removed...
But maybe I'm wrong!?

Thanks and regards

Roberto

bludgod

iTrader: (3)

on a 2port solenoid the restrictor pill limits flow from the compressor nipple to the T piece where the 2port bleed valve and bleed off a controllable amount of pressure going to the wastegate. Because a 3port is interrupt and not bleed type the restrictor pill goes on the vent port (the one that normally goes back to the intake pipe) so as to reduce the amount of flow bled off from the system when it's active. This helps for a smoother response when shooting for lower boost targets but generally the pill is removed on a 3port to allow higher boost targets to be achieved.

alstare84

Thanks again to all