Generic *budget* low boost turbo build

[JP]

a WRX TD04L will give you about 8-9psi on wastegate pressure.

I did a turbo setup on a high compression smallport 4age using a blitz log manifold, tiny turbo and external gate with 4psi spring. I used AE92 MAP 4agze ECU, ignitor, coils, CAS, injectors and map sensor to run it. It was great fun to drive.

[mullett]

meh, megasquirt can work with your stock sensors (90% of the time).. wire plug to fit to stock ECU, and then can swap back later.. no wiring changes.

Haha, but I'd break it if I tried to build my own, and a pre-built one runs the same kinda cost as an Adaptronic...

-RM

[mullett]

Good info on the WRX turbo, i haven't been able to find the stock wastegate pressure. Other option is probably a T25 from a CA18, I think they were around 5psi?

-RM

[Duk]

meh, megasquirt can work with your stock sensors (90% of the time).. wire plug to fit to stock ECU, and then can swap back later.. no wiring changes.

It would be seriously sweet if someone made it so the Megasquirt could data log the factory system and self program both fuel and ignition timing.
Run the engine thru as many real world conditions as you could while the Megsquirt was data logging/self tuning, and then switch over to the Megasquirt and fine tune after you've made you modifications

[mullett]

Aye, likewise with the adaptronic. Although it now does VE based tuning, which should net you a pretty solid basemap, and then from there the WB02 tuning can take care of the rest

Also: Am I correct in thinking that because the dizzy only has two output wires (which I assume to be CAS signal), that the ECU does not actively control the spark? Or does the ECU control the coil firing time to control spark?

-RM

[JustCallMeOrlando]

Haha, but I'd break it if I tried to build my own, and a pre-built one runs the same kinda cost as an Adaptronic...

Rudi would LOVE to do it

[Duk]

Aye, likewise with the adaptronic. Although it now does VE based tuning, which should net you a pretty solid basemap, and then from there the WB02 tuning can take care of the rest

Also: Am I correct in thinking that because the dizzy only has two output wires (which I assume to be CAS signal), that the ECU does not actively control the spark? Or does the ECU control the coil firing time to control spark?

The 2 wires will be from a crank trigger, but I'd guess that the ECU doesn't really know where the engine is in it's rotation but does still control the ignition timing.

[mullett]

Controls the timing at the coil i guess...I'll have to investigate

-RM

[oldcorollas]

It would be seriously sweet if someone made it so the Megasquirt could data log the factory system and self program both fuel and ignition timing.
Run the engine thru as many real world conditions as you could while the Megsquirt was data logging/self tuning, and then switch over to the Megasquirt and fine tune after you've made you modifications

many people have considered that (myself included) but.. in the end.. factory systems are rarely very good for modified engines.. and often not that good for stock engines (except emissions).
and MS is so easy to tune, there really is no need for mapping the stock systems..

[JP]

the timing is controlled by the IGt wire to the ignitor from the ECU. When you wire an emanage to control timing on a 4age, that's the wire you intercept.

[Duk]

It's just ALL the small stuff like cold start and temperature correction that I'm really interested in.
I'd much rather do fine tuning than start from scratch tuning. That's why I bought an Emanage Ultimate instead of an after market system. Let the factory stuff do the menial and use the EMU to fine tune the fun parts .

Having said that, the new updates to the likes of Adaptronic and Megasquirt aswell as some pretty decent base map tunes makes that mentallity a bit redundant.
Then it comes down to actual installation time and difficulty (of doing a quallity and reliable installation).

[knightrous]

Haha, but I'd break it if I tried to build my own, and a pre-built one runs the same kinda cost as an Adaptronic...

-RM

~$400 gets you an assembled MegaSquirt 2 v3.0 at the moment due to the good dollar. Can you get Adaptronics for~ $400, and that will provide the same amount of features a MS2 can? (I'm not familiar with the Adaptronics ecu).

MegaSquirt gives you a pretty good starting map to begin with just based on some of the motor parameters, mine started first go and idled rather well. I street tuned mine in a few hours (To the point acceleration was smooth through the rev range and wasn't running pig rich) and then occasionally changed bits and pieces here and there, mainly for economy.

[mullett]

That's a lot cheaper than they were last time I looked at it, does it support closed loop 02 and a few other bits?

Adaptronics run at around $800-1k, but provide a wealth of features and excellent backup. If I was going to go to the expense and trouble of changing the ECU, I'd have another one in a heartbeat.

www.adaptronic.com.au

-RM

[Duk]

~$400 gets you an assembled MegaSquirt 2 v3.0 at the moment due to the good dollar. Can you get Adaptronics for~ $400, and that will provide the same amount of features a MS2 can? (I'm not familiar with the Adaptronics ecu).

Download the computer software for the Adaptronic
Unless the Megasquirt software got brilliant, real fast, the Adaptronic shits on it in terms of mapping density and number and configuration of programmable outputs.

Don't go getting me wrong tho, I aint dissin the Megasquirt, just making points.

[oldcorollas]

MS has always done closed loop

mapping density is wayyy overrated. if you can draw a straigth line between any 3 points on your map, you are wasting points.. they are redundant

basic megasquirt was always mean tto be basic.
the "Extra" codes are the fancy ones with many more features.. although the basic MS2 is fairly advanced now...
abotu the only thing it is missing is individual cylinder trim i think?

looking at the adaptronic website, there is nothing that stands out as significantly different between the two tho?

and plenty of support
http://www.msextra.com/doc/ms2extra/

Staged injectors -- Launch Control -- Switched Maps -- NOS Control -- Programmable Outputs -- Tacho Output -- Idle Valves
Boost Control -- Second O2 input -- Constant Barometric Correction -- Knock Control

etc