studabear

A while ago I converted my mfi cabrio to cossie management, this was all well and good as I retained the amal valve.

I've since removed the cossie management and nearly sold it all

I'm soon gonna crack on with putting the car back together, and will be running a megasquirt ecu set up.

I would like to know what people do regarding boost control, my turbo has a -31 actuator do I just pipe the comp housing to the actuator or do I need a boost controller? I know karlos runs a fancy ebc.

Cheers in advance

Stu

Karlos G

iTrader: (4)

You can do as you describe or I'd just run a MSD bleed valve, handy for when your mapping and need to gradually up the boost to your target.... Actuator rods get very hot! lol

studabear

Cheers pal, I may pm you in the next day or so with a few more questions anyway.

Msd is handy its only 5mins away.

Rollinz

or...
throw the MS in the bin... i am selling my DTA s60 pro ecu and loom...

luke19790_3

why?? for the money megasquirt is a very good.

Rollinz

what does it cost to get a MS set up propperly? mapped and runing good??
including buying in 1st place??

an S40 DTA unit can be done start to finish for Ł800

luke19790_3

around 360 to buy, people who buy them do most/all the work them selfs

Rollinz

ive used it in the past on a st170 engine.... never got good results, ran diferently everyday as could never get compensations right and in the end had issues of the injector driver opening the injectors full on cranking.....

so binned it and never looked back. use DTA all the time now. easy to use too for the self/home mappers

luke19790_3

but didn't know about the price for a dta. sounds good

Whats the software like?

Rollinz

very simple and straightforward,

you can download it for free i think from DTAfast website,

quick over view of the cheaper s40...

S40 PROOverview Maintaining the highest manufacturing quality and reliability of more sophisticated ECU’s in the S series range it provides a lower priced solution for a wide range of applications.
The primary aim of the S40 is to provide an economic ECU for relatively simple wasted spark four cylinder engines using semi-sequential injection.
Advanced features and system flexibility, however, are in no way sacrificed to this aim.
S40 PRO is also available in an ignition only version ECU Functions


Engine Configuration

20,000 rpm capability
Flexible and easily adapted to different OEM, crank, cam sensor arrangements.
Genuine four and two stroke support.
Twin injector engines.
Semi - sequential injection.
wasted spark or distributor.
User controlled fan activation.
Sensors can be calibrated individually with a lot of preset options supplied.
Flexible Tacho Output
soft and hard rev limits

Main Fuel and Ignition Functions

Comprehensive start up fuelling options both time and temperature dependant.
Air, coolant and manifold pressure compensation maps.
Throttle transient increase compensation.
Throttle transient reduction compensation.
RPM and load breakpoints can be calibrated by the user.
Throttle or MAP as load.
All maps with one or two dimensional with interpolation as required.
Lambda control functions

Extensive lambda parameters table to ensure stable closed loop operation and emissions requirements can be met where needed.
Full three dimensional lambda target map.
Auto-tuning function.
Turbo Control Functions

Open or closed loop turbo pressure control via PWM valve.
Modify target turbo pressure by gear selected.
Modify target turbo pressure by vehicle speed.
Active base PWM map for easy calibration.
Idle Control Functions

Open or closed loop idle speed control via PWM valve.
Closed loop idle target speed temperature dependant.
Active base PWM map for easy calibration.
Fuel enrichment table calibrated versus PWM percentage.
Flexible Input/Output

Three uncommitted input tables which use 0 5 volt inputs or any input the S60 knows already, linked to fuel and advance modifiers and a PWM output.
Launch Control

Fully flexible first gear launch capability.
Extensively tunable to individual vehicles.
Full Throttle Gear Shift Cut

Shift cut capability with 1ms resolution, variable for each gear with
full switch de-bounce capability.
Voltage Compensation Tables

User configurable voltage compensation tables for injector dead time
and coil on time (dwell time).
Diagnostics and Test Features.

Full sensor diagnostics and fault recording.
Extensive engine run time recording at different load and speed conditions.
Ability to exercise injectors and coils without engine running for fault finding.
Other Features

Sealed Latching Connectors
Size 115 x 100 x 41 mm
Weight 268 gm
All outputs protected against over temperature and over current
Inputs protected against severe wiring mistakes and accidents
Reverse battery protection
Alternator load dump protection
Input and Output Features
Inputs
Crank Shaft (Magnetic Only)
Throttle Position
Coolant Temperature
Air Temperature
Manifold / Barometric Pressure
Lambda
Oil Pressure
Fuel Pressure
Oil Temperature
Battery Volts
3 x User Defined Analogue (Shared Use)
Launch Switch
Shift Cut
Undriven Wheel Speed

Outputs
2 x Coil Drivers
2 x Injector Drivers
Tacho
Fuel Pump Relay
Fan/Aux 2/Turbo Pressure Valve (Shared Use)
Idle Valve (Shared Second Injector Driver)
Shift Light

Rollinz

luke19790_3

thanks

Rollinz

the best bit is the diagnostics.... it actually works!!

Rick

I've mapped a few DTA's it's ok but nowhere near MS. It's better than say Gotech but you still map in terms of pulse width for the main fuel table.

Rick

Rob_DOHC

iTrader: (4)

I've run MS for around a year now. With some intelligent mapping (ie, read the manuals properly and think about things before pressing buttons) you get very good results. My AFR is spot on now in all conditions, and it delivers power very smoothly with decent throttle response.

Im not saying DTA is shite, but its far from being better than MS.

Studabear, have you considered using megasquirt to control your boost via a solenoid valve? MS2 will do open and closed loop boost control. I will be testing this function over the next few months.

Rob,

Rob_DOHC

iTrader: (4)

On another thread you were telling me how well the engine ran by controlling the vvt wrongly. Which is it?

If you had issues with the injector drivers im really not surprised it ran differently day to day.

Rollinz

when i switch to DTA i did run the VVT...

studabear

Sounds interesting re soleniod valve. Where do I get 1 of them from?

I've got a big shopping list at the minute.

juffer

Get a perrin solenoid and have the ECU moddified to allow it to work. I think the add on for the ECU is about Ł15.

http://www.ebay.co.uk/itm/PERRIN-UPR...item3f026fcd36

Rob_DOHC

iTrader: (4)

As above, the perrin will work, as will several others, http://www.ebay.co.uk/itm/AEM-Turbosmart-boost-controller-solenoid-control-valve-/110794290646?pt=UK_CarsParts_Vehicles_CarParts_SM& hash=item19cbdab5d6

or cheaper but the same i think.... http://www.ebay.co.uk/itm/Gizzmo-IBC...item336fa329a1



The ecu mod is pretty straight forward too, transistor (tip121 will work well here), protection diode and a resistor, you may or maynot need a pull up resistor too. Similar to the idle circuit. Some ecus come with this as standard so check when you buy.

Rob,

Rob_DOHC

iTrader: (4)

A fair enough, good luck with selling the dta

xr2wishy

iTrader: (2)

I'd just run a operate electronic boost controller, that's what I have with my megasquirt.
Megasquirt does loads brilliantly, but I'm just not comfortable with anything pwm controlled, even closed loop idle can be a pain.

studabear

Which controller are you using sean?

Rob_DOHC

iTrader: (4)

Closed loop idle is very dependant upon the settings used for the pid algorithm, open loop pwm is very repeatable and stable, I've had an ecu on the bench working for over 14 hours now with idle valve, injectors and coil attached testing for reliability, with a scope attached and the pwm % hasn't drifted at all.

I'd be comfortable with open loop boost control but i haven't tested the closed loop at all but i suspect it will be the same as closed loop idle. But like you say a separate and dedicated boost controller would be the best all round solution.

Im using a gizzmo at the moment which works really well, but i have read really good reviews for a few controllers now, theres a back to back magazine test article somewhere which really sorts the good from bad, ill see if i can find it.

Rob,

Rob_DOHC

iTrader: (4)

Heres an alright write up for the mod on an MS1, MS2 does the CL much better from what i understand,

http://forums.turbobricks.com/showthread.php?t=80599

There are a few people using the CL here with a good write up

http://www.e30tech.com/forum/showthread.php?t=30543

For the money it will cost you i would be tempted to give it a go, but if you want something which works right out the box i would just get a proper boost controller like a gizzmo or avc-r (which i believe karlos highly rates).

Rob,

Chip

iTrader: (3)

Its nowhere near as flexible as the megasquirt, so conversely its essentially easier, as if there is less you can change it means there is less you can get wrong.

IME anyone slagging off megasquirt just simply doesnt understand enough about mapping to realise why its good to have so much functionality.

Chip

iTrader: (3)

Agreed, the DTA still very much feels like an older generation of ECU to me, its a step forward from the older P8 Pro etc but its still nowhere near the modern stuff like autronic and megasquirt etc where you have proper normalisation of the data in terms of seperation between VE map and injector scaling etc.

studabear

Does anybody have a contact email for the fella who runs extra efi.

The contact section on his site keeps sending me to either a Gmail page or a yahoo mail page.

Rob_DOHC

iTrader: (4)

Do you want your ecu modded for the boost solenoid mate? I've got a draw full of TIP121's and would be happy to do it for free if you pay postage.

studabear

I haven't got a ecu yet rob, I was just gonna try and get a quote from them.

edit to add, as I'm now near on in the position that I will need to get 1 on order in the next couple of weeks.

juffer

philip.extraefi@ntlworld.com

Speak to karlos first. He did mention a while back he could get good price's lol

studabear

Cheers for that

Rob_DOHC

iTrader: (4)

ahh no worries, good luck.

Rob,

Chip

iTrader: (3)

If you havent got an ECU then you could try dropping Rob DOHC a PM about one, as he sells them but isnt a trader on here so wont mention it!

studabear

Cheers chip

Chip

iTrader: (3)

Shh, dont tell the mods, lol!

mk1turboestate

iTrader: (2)

+ 1 to rob, very helpfull and knows his stuff

Rob_DOHC

iTrader: (4)

lol cheers chaps! but seriously I offered the ecu mod as FREE favour not a sale mr mod.

Karlos G

iTrader: (4)

I can yes, but Rob is now the man I would turn to for one as Chip suggests above!

studabear

I've spoken to rob regarding this, but at this time I may have to use extra efi inorder to get the car running in the next couple of months.