Boost Gauge - Page 4 - PeachParts Mercedes-Benz Forum

#46 02-12-2006, 12:28 AM

Here is a picture of a gauge cluster I installed today.

Right now it's Boost-Line voltage-System vacuum
After I get all my ducks in a row it will be Boost-preturbo Pyro-Intake air charge temp.

I've got a 0-15psi VDO gauge in the mail from eBay right now. The pyro is due for next month and the intake temp gauge the month after.

H-townbenzoboy · #47 02-12-2006, 01:01 AM

The setup looks VERY much like a factory installation. Going by the a/c vents (different on the 240Ds than the 300Ds) and gasser tachometer combo (could tell because of the redline marking), that's the 240D 3.0 isn't it?

#48 02-12-2006, 01:37 AM

Quote:

Originally Posted by H-townbenzoboy

and gasser tachometer combo (could tell because of the redline marking), that's the 240D 3.0 isn't it?

I painted on the redline myself. I had a different tach that I also painted "yellow line" between 4500 and 5000. I didn't use it because it had a 3-prong plug and I only had the 2-prong amp from my TD.

dieselmania · #49 02-12-2006, 10:17 PM

I bypassed the switchover valve today, 0-60 runs are the same. 16.5 seconds. My next test will be to check the speedo. It seems like I am really flying when it reads 60MPH. Maybe I am really doing 70 or more, that would explain the longer times. I have noticed on the Interstate at 75 I seem to be passing nearly everyone else, making me suspect maybe the speedo is off.

Brian Carlton · #50 02-12-2006, 10:22 PM

Quote:

Originally Posted by dieselmania

I have noticed on the Interstate at 75 I seem to be passing nearly everyone else, making me suspect maybe the speedo is off.

............passing folks at 60 mph..........ahh.........yeah..........

dieselmania · #51 02-13-2006, 12:15 AM

No at 75MPH, not 60. Go 60 around here you'll get run over. I am saying, perhaps when my speedo is reading 60 I am really doing 70. So when it reads 75 maybe I am really doing 85. I need to get a friend to help me check it, (not the Highway Patrol).

Brian Carlton · #52 02-13-2006, 08:59 AM

Quote:

Originally Posted by dieselmania

No at 75MPH, not 60. Go 60 around here you'll get run over. I am saying, perhaps when my speedo is reading 60 I am really doing 70. So when it reads 75 maybe I am really doing 85. I need to get a friend to help me check it, (not the Highway Patrol).

.........OK, got me a bit confused there. Less likely to be the speedo if you are passing folks at "75".

I'm wondering if the ALDA is giving you proper enrichment? You do get proper turbo boost but, it might be the situation where the ALDA is not providing sufficient fuel enrichment. We saw this recently when one member replaced the ALDA.........it's travel was a fraction of the proper amount. The change in the vehicle was dramatic.

87tdwagen · #53 02-13-2006, 12:06 PM

Quote:

Originally Posted by dieselmania

I want to install a boost gauge. I don't intend to increase fuel or anything, I just want to know I have stock boost. I really like the look of the VDO 15 PSI gauge. If I remember right, stock boost for the 603 engines is 14 PSI. So the 15 PSI gauge should be all I need right? I could get the 30 PSI but the 15 is so clean and it would be easier to read at a glance while negotiating a mountain highway at 75 MPH. Any suggestions?
Brian

When you choose your boost gauge consider the style of the gauges relative to your placement of it. In my installation I started with a 30psi gauge but then realized after mounting it in the location below, I could not see the needle position w/o really taking my eyes off of the road. The needle sweeps from 7 o'clock to 5 o'clock with most operation being in the 7-12 o'clock position.

I switched gauges and installed a vac/boost combo that shift the clock position of the gauge sweep to 11-5 o'clock, so now I can monitor the gauge out of the corner of my eye rather than strain to read it. I also do use the vac side for diagnostic purposes, I carry some vac tubing and ends so that I'm never without should I need to test roadside