E 320 Turbo

[tatatata]

E300 not 320 E, my bad

Greetings all!

Me and my friend are working on an early 90's E300 2.8 twin cam (NOT Diesel) we just purchased, so we're doing alot of custom body and engine work and so one of the performance tasks is a t/4 turbo kit already dropped in.

I'm doing alot of searching but I'm a little stuck b/c I can't find any info on what ECU and injectors I should go with to compensate for the xtra air flow, since I don't have much experience w/Benz tunning, I don't even know what to search for.

Is there something any of you have experience with, and would like to suggest.


Any help highly appreciated.

John.

Edit, I hope this post is in the right section.

 

[Vlad]

I had a twin Turbo 300E and it ran on standard injectors and standard ECU....the latter may not be the case for the Twin Cam M104 engines that use a more sophisticated engine management system.

 

[tatatata]

Vlad, thanks for your help.

I rane it few times since I installed the turbo and it feels like it hits a fuel cut @ around 3K rpm, it will not rev without bogging under boost.

Do you think the stock fuel system and engine management are sufficient to keep the motor safe for at least 6-8 psi of boost?
Is there a fuel cut defenser that detects boost and stops the motor from reving?
What about MAF sensor, can it be bad and make the motor bog regardless there's a turbo or not?

Thanks again, your help is greatly appreciated,
John.

 

[Vlad]

I'm sure my twin turbo set up ran at much lower PSI than yours.

As for the other questions, I'll have to pass on those as I do not have the technical expertise to comment....all I can say though is that as my conversion was on an older M103 engine, that particular engine did not have a MAF.

 

[ADY1983]

I would think you could have the standard ECU for the M104 remapped by a decent tunning company, I would get friendly with your local rolling road...

Ady

 

[tatatata]

Thanks for the help,
Going to ask around here if anyone can tune the ECU for me, I'm still new to the MB tunning world so it may take a while.

John.

 

[kth286]

tatatata

Your car has gone into 'limp home' mode.

You need to get the codes read first thing, and then go from there.

Regards

 

[Dieselman]

Don't know if this might be interesting..

http://www.mbclub.co.uk/forums/showthread.php?t=697&highlight=turbo

 

[tatatata]

tatatata

Your car has gone into 'limp home' mode.

You need to get the codes read first thing, and then go from there.

Regards

Even if it runs fine on idle and or low rpm?
I'll see if I can check for codes.

Don't know if this might be interesting..

http://www.mbclub.co.uk/forums/showthread.php?t=697&highlight=turbo

Very interesting actualy, even though they are working on a different motor.


Thanks,
John.

 

[kth286]

tatatata

Yes - 'limp home' mode limits the max revs.

Regards

 

[tatatata]

tatatata

Yes - 'limp home' mode limits the max revs.

Regards

Got ya, thanks,

 

[Glenn Smith]

You will need to increase the fuel pressure as the boost increases, typical fuel injection run at 30-40 psi, when manifold depression is taken into account the pressure differential is even greater, the turbo will give positive press in manifold so you need to increase fuel press to compensate, fueling would also need to be adjusted and a reduction in compression ratio would also be needed, especially above 7psi boost. Specialist knowledge and practical experience is the only way to acheive decent and reliable results.

 

[MDMB69]

I'm using an Apexi S-AFC fuel controller on my supercharged installation with the same engine as yours. I'm running max 5.5psi. Stock injectors are fine I believe upto 360bhp, I have the calcs somewhere on my pc. I'm not running an intercooler and am soon to be adding water injection to give me hopefully another 30-40 bhp.
I also have fitted a fuel/air meter and inlet temp gauge to keep an eye on things. Wish I'd turbo'd it tho. I'll never go down the Eaton supercharger route again, far too complicated.