1000 HP AMGs
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,768
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From: South FL & NYC
Your worst nightmare...
Here goes a very important question: Vadim, are you able to tune this monster beast? I definitely understand that there are certain limitations to the stock ECU.
From what I have heard the major issue with this upgrade is tunning....
From what I have heard the major issue with this upgrade is tunning....
Junior Member
Joined: Oct 2008
Posts: 53
Likes: 0
From: Heaven
2008 SLR
Controlling boost in a compound boost application like this is going to be a bigger challenge. There will be boost creep and backpressure issues galore. Mind you that the stock map sensor will trigger a boost cut at around 22 psi. I'd be thoroughly surprised if this car ever runs right. It will need a standalone ECU and a reconfiguration of the turbos so that the compound set-up works properly. A properly set up compound boost configuration has the smaler turbo feeding the larger turbo. With this car it is the opposite. Best of luck regardless. I just purchased a Maybach 57S and will extensively mod it. I will keep everyone posted.
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,768
Likes: 5
From: South FL & NYC
Your worst nightmare...
Controlling boost in a compound boost application like this is going to be a bigger challenge. There will be boost creep and backpressure issues galore. Mind you that the stock map sensor will trigger a boost cut at around 22 psi. I'd be thoroughly surprised if this car ever runs right. It will need a standalone ECU and a reconfiguration of the turbos so that the compound set-up works properly. A properly set up compound boost configuration has the smaler turbo feeding the larger turbo. With this car it is the opposite. Best of luck regardless. I just purchased a Maybach 57S and will extensively mod it. I will keep everyone posted.
One question that has always pussled me is if you run a bigger turbo wouldn't you have to cut boost back to let's say maybe 10-15 PSI since you are making more power with less boost and a bigger turbo? The bigger turbo would be more efficient...., therefore would not need to reach 22psi...just thinking out loud..
Last edited by V12Godspeed; Jan 12, 2009 at 06:10 PM.
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Super Member
Joined: Dec 2006
Posts: 568
Likes: 1
1988 535i 5 speed
It happens because turbos after a certain RPM don't produce anymore real boost, they just spin more. It's got more to do with the design of the housing, compressor size, A/R, etc. The stock turbos most likely start to choke at 22 psi (technically whatever that equates to in flow rate) and so they cut at that. Of course, limiting boost also limits power, can't have a *****load of boost just building up, and as we've seen, 22 is enough to make plenty of power! 
Vadim, what are the exact specs on the stock turbos? From that, its a few simple backwards calculations to figure out how much they flow. Go to Garrett's website, they explain it in detail, its pretty cool!
Vadim, what are the exact specs on the stock turbos? From that, its a few simple backwards calculations to figure out how much they flow. Go to Garrett's website, they explain it in detail, its pretty cool!
Senior Member
Joined: Nov 2007
Posts: 286
Likes: 0
From: Florida
GT-R
Controlling boost in a compound boost application like this is going to be a bigger challenge. There will be boost creep and backpressure issues galore. Mind you that the stock map sensor will trigger a boost cut at around 22 psi. I'd be thoroughly surprised if this car ever runs right. It will need a standalone ECU and a reconfiguration of the turbos so that the compound set-up works properly. A properly set up compound boost configuration has the smaler turbo feeding the larger turbo. With this car it is the opposite. Best of luck regardless. I just purchased a Maybach 57S and will extensively mod it. I will keep everyone posted.
Back on topic, I agree that its going to be a monster to tune but I think Vadim has the capabilities to do so. Time will tell.
Super Member
Joined: Nov 2004
Posts: 992
Likes: 11
From: Illinois
GL550, C55, 335i Coupe, vintage Mustang
You better come up with a picture with at least 3 of those cars all together!(preferably not the GTS and ZR1)
Nick
Last edited by nick 55; Jan 12, 2009 at 11:51 PM.
Member
Joined: Jun 2007
Posts: 91
Likes: 1
From: Salt Lake City Utah
SL65 VRP1000 and 20" Monolites
I can give a quick update...
In order to tune the car properly, Vadim needs to get this thing on the streets, and do a "streetability" tune, and then hit the dyno..
Well the problem is, that the car has been at the shop for so long that the plates have expired, and the car can't be driven on the streets with expired registration...
But, in order for me to renew the registration, I need to have the car safety and emission tested IN UTAH..
So, we've been stuck in a quandry trying to figure out how to get around this little issue..
I know there are some "sneaky" and some "not totally above board" ways to get it done, but with the profile of the car, and my notoriously heavy right foot, if any of these ways get found out once I get the car back home, I may have an issue that I'd rather not have to deal with..
And, of course, Vadim doesn't want to get the car impounded in SO CAL b/c he is "tuning" it.. and of course I don't want the car to get impounded either...
So, just some minor issue that I'm working thru.. But, I'll figure it out, and get this thing going..
I don't really want to load it on a trailer and get it home, and then have to turn around and send it back. With it being untuned it probably wont pass emissions..
In order to tune the car properly, Vadim needs to get this thing on the streets, and do a "streetability" tune, and then hit the dyno..
Well the problem is, that the car has been at the shop for so long that the plates have expired, and the car can't be driven on the streets with expired registration...
But, in order for me to renew the registration, I need to have the car safety and emission tested IN UTAH..
So, we've been stuck in a quandry trying to figure out how to get around this little issue..
I know there are some "sneaky" and some "not totally above board" ways to get it done, but with the profile of the car, and my notoriously heavy right foot, if any of these ways get found out once I get the car back home, I may have an issue that I'd rather not have to deal with..
And, of course, Vadim doesn't want to get the car impounded in SO CAL b/c he is "tuning" it.. and of course I don't want the car to get impounded either...
So, just some minor issue that I'm working thru.. But, I'll figure it out, and get this thing going..
I don't really want to load it on a trailer and get it home, and then have to turn around and send it back. With it being untuned it probably wont pass emissions..
Last edited by New2this; Jan 30, 2009 at 01:20 AM.
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,862
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From: Sin City
2005 E55 AMG - - 2005 SL55 AMG - - - - - - 2006 SLK55 AMG - - - - - - 2013 Ducati Diavel AMG -
I might have a quick solution...my SL is currently motorless with a current registration and well...
I know...I know...just a thought...
Senior Member
Joined: Mar 2007
Posts: 340
Likes: 1
First of all, a tuner should have transportation plates.
Use Havoc's plates and reg. Has anyone ever had their VIN checked when stopped?
Agree to pay half the cost to fly the customer out there for a day or two of testing.
Trailer the car out to a track.
Call the BMV and explain the situation and see if they can give you a temp sticker for your windshield. They do this in Indiana.
Borrow a dealer plate.
Put a plate from another car on there, send a scout car out ahead of the SL to make sure there's no police.
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,862
Likes: 5
From: Sin City
2005 E55 AMG - - 2005 SL55 AMG - - - - - - 2006 SLK55 AMG - - - - - - 2013 Ducati Diavel AMG -
MBWorld Fanatic!
Joined: Aug 2006
Posts: 1,885
Likes: 0
From: S.D Cali
CLS63
YAWN YAWN,, 
Are you guys kidding 
all that time and money just sitting wasting there because of registration 
I sure hope you guys can figure out how to tune that beast better than a simple reg problem eix 
s orry man I just had to.. GET THAT THING DONE MAN.. I have a 2000 hp CLS but I can't try it out cuz it has a flat tire for over a year now...... Let me know if you need my help driving the car on the street legal.. I can drive it without a problem of towing or ticket for reg..
Are you guys kidding all that time and money just sitting wasting there because of registration I sure hope you guys can figure out how to tune that beast better than a simple reg problem eix s orry man I just had to.. GET THAT THING DONE MAN.. I have a 2000 hp CLS but I can't try it out cuz it has a flat tire for over a year now...... Let me know if you need my help driving the car on the street legal.. I can drive it without a problem of towing or ticket for reg..
MBWorld Founder
Joined: Nov 2001
Posts: 2,599
Likes: 7
From: Scottsdale (aka The Surface of the Sun)
As an FYI, we face this problem often. We simply put an evosport license plate insert in place of the plate, and carry the signed work order from the customer in the car. The police are typically more then understanding in these situations. This really should not be what holds this up.
In fact, my personal car has had expired tags for 6 months (paid the fee, but need a smog check) and I drive past cops all the time with no problems.
I am as anxious as everyone to see this car driving!
Thanks
Brad
In fact, my personal car has had expired tags for 6 months (paid the fee, but need a smog check) and I drive past cops all the time with no problems.
I am as anxious as everyone to see this car driving!
Thanks
Brad
