vrus

Your car is an 06..

If it is dropping to 10:1 at 5,000RPM and over then you have 1 of 3 problems:

1) Too much heat, ECU is pulling timing and dumping fuel

2) Belt is slipping like S.O.B.

3) The load limiters in your ECU were not programmed out with the Evotech flash and ECU is bleeding boost by opening bypass valve and dumping fuel. This is what we corrected and R&D'd on Jangy's 2006 VR550 package.

More than likely, Evotech does not have the proper parameters in the ECU for 2006 cars to deal with the load limiters. The only way to know 100% is datalog the car and see if the boost drops back down to 12psi from 15psi when RPM goes above 4,500RPM. If you see boost drop at high RPM then you know its your load limiters kicking in. (NOTE: You have to first make sure your belt isnt slipping.. check for belt dust and frayed edges to be sure it isnt the belt first..)

BallzyS55

So this may result in loosing power in top rpms? Could that be dangerous for my engine?

vrus

Well.. you are definitely loosing power.. You are probably down 30-40hp if not more.

It is not dangerous.. it is actually safe because the ECU just dumps fuel which keeps everything cool and under control. Just that your car is not running as it should.

And also, if those guys are trying to tap a "boost reading" I would turn and RUN the other way... You dont tap boost on dyno pulls..

Timeless

Vic continues to amaze me with his knowledge and willingness to help.

tigerlam92

I think we should qualify this statement a little. Tapping a boost source during a dyno is actually very commonly done. I have done this all the time to determine exactly what boost you are seeing at what rpm. I also had a boost gauge in my Camaro as well. This is very useful information to get from the dyno.

However, I have not done and have not heard someone doing this on the E55 yet.

BallzyS55

I will check the belt as soon as I get the car back from steeler, as I took it in for abc problem after dyno, also wodering so that ecu tune is basicly taking away from my power, so if I flash the ecu back to stock, I should be having more power than I am now?

BallzyS55

The only way to know 100% is datalog the car and see if the boost drops back down to 12psi from 15psi when RPM goes above 4,500RPM. If you see boost drop at high RPM then you know its your load limiters kicking in.


So how do I datalog, and where can I do that?

MB_Forever

You'll need a data logging device. I think Nology has been suggested as one of the good ones to use.

mbamg06e55

Bro,

If you want you can borrow mine.

Jakpro1

True, but to do it on our AMG's you gotta drill and tap one of the surge tanks.

Not something you can do at the dyno shop, well quickly.