Bi-turbo Wastegate Adjustment!!!
Thread Starter
Senior Member
Joined: Apr 2006
Posts: 267
Likes: 9
From: Passaic, NJ
S600 Bi-Turbo/E39 M5
Bi-turbo Wastegate Adjustment!!!
On my 600, (and I'm sure the 65's have them too), there's a wastegate adjustment rod!! I got excited when I saw this while changing the oil. Has anyone tried adjusting this rod for more boost? I know the ECU upgrades revamp timing/fuel/boost/and a bunch of other parameters, I'm sure. I cant help but wonder if it would run right, and make considerably more HP by just adjusting these rods. AND RUN RIGHT??
I am really tempted to stick a wideband in the exhaust and figure out how to hose up a boost gauge under the hood. Then take the car for a stock run and record it's data. (Does anyone know what boost these cars run stock and what the stock air/fuel mixture is?) Then mark the stock settings on the wastegate rods somehow. Then CRANK each rod on the wastegates exactly the same. I'd probobly need 2 boost readings, one for each turbo obviously to make sure they're equal.
Has anyone ever tried this?
John
I am really tempted to stick a wideband in the exhaust and figure out how to hose up a boost gauge under the hood. Then take the car for a stock run and record it's data. (Does anyone know what boost these cars run stock and what the stock air/fuel mixture is?) Then mark the stock settings on the wastegate rods somehow. Then CRANK each rod on the wastegates exactly the same. I'd probobly need 2 boost readings, one for each turbo obviously to make sure they're equal.
Has anyone ever tried this?
John
Super Member
Joined: Mar 2006
Posts: 514
Likes: 0
From: Chicago
CL65
On my 600, (and I'm sure the 65's have them too), there's a wastegate adjustment rod!! I got excited when I saw this while changing the oil. Has anyone tried adjusting this rod for more boost? I know the ECU upgrades revamp timing/fuel/boost/and a bunch of other parameters, I'm sure. I cant help but wonder if it would run right, and make considerably more HP by just adjusting these rods. AND RUN RIGHT??
I am really tempted to stick a wideband in the exhaust and figure out how to hose up a boost gauge under the hood. Then take the car for a stock run and record it's data. (Does anyone know what boost these cars run stock and what the stock air/fuel mixture is?) Then mark the stock settings on the wastegate rods somehow. Then CRANK each rod on the wastegates exactly the same. I'd probobly need 2 boost readings, one for each turbo obviously to make sure they're equal.
Has anyone ever tried this?
John
I am really tempted to stick a wideband in the exhaust and figure out how to hose up a boost gauge under the hood. Then take the car for a stock run and record it's data. (Does anyone know what boost these cars run stock and what the stock air/fuel mixture is?) Then mark the stock settings on the wastegate rods somehow. Then CRANK each rod on the wastegates exactly the same. I'd probobly need 2 boost readings, one for each turbo obviously to make sure they're equal.
Has anyone ever tried this?
John
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,703
Likes: 5
From: Arizona
SL55AMG, Ferrari 348, Ferrari Testarossa, Ferrari F40, Ferrari Mondial t, Ducati 916, Indycar
The ECU will pull the boost back to where the programed setting is at. The ECU will think you are in denser air and compensate by opening up the wastegate thus lowering boost. Once your ECU is programmed for higher boost you might be able to squeeze an extra pound or two out of it, but then you will hit boost cut. Remember that the turbo is way out of its efficiency range at 20-21 psi and is only going to make hotter air the higher the boost goes.
I get guys with 55 cars who have bought a pulley, without working with the software, and they can't understand why it isn't more powerful. It is the same situation. Once we work the software... it comes alive.
doh!
Member
Joined: Jan 2007
Posts: 238
Likes: 2
From: ca
2003 s600
I do have to readjust my right wastegate rod, the nut on the end of the rod fell off. I just looked at how many threads were visible after nut on left rod and tightened a new nut onto right rod to same number of threads(5 i think). It wouldnt go anymore anyway, when car is off, i think wastegates are fully closed, right. wastegate lever was facing straight down to ground.
