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#1
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Cheap Boost Gage
I needed another boost gage to read exhaust manifold pressure in Mutt and for some reason I thought to look at Harbor Freight. Sure enough they had them, with multi-colored light display (that I'm not using). Anyhow, it was like $17 or something. Evidently they bought a boatload of them for cheap. Anyhow, it seems to work OK - though I can't vouch for the multi-colored lights.
Dan |
#2
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Any pics of the setup? Also what type of line you used to the exhaust manifold?
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1983 123.133 California - GreaseCar Veg System |
#3
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I did the same, super easy, tapped the vacuum line off of the intake manifold and plumbed it through the firewall. 3 wires were ground, 12v and constant
Sent from an abacus
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#4
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Wouldn't an EGT gauge be more handy?
The problem with most of the boost gauges on the market is they also include a vacuum section which is kind of useless on a diesel.
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CENSORED due to not family friendly words |
#5
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The super cheap it to get a $5 tire pressure dial gauge (which typically has a 1/8NPT fitting) and hook that up
Auber instruments sells ~$75 EGT gauge setups, FYI
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
#6
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I already posted a pic of the set-up in another thread so I can't repost it - sorry. Darn if I can remember the name of the thread but I didn't originate that thread. Basically I used a loop of copper line off the exhaust manifold to dissipate the heat before connecting to the provided plastic line. For a boost gage the provided line would be fine.
Anyhow, I have an Auber EGT and a boost gage in the dash. The extra boost gage was to calculate the pressure ratio to help diagnose the boost issue with the race truck. I'll remove it now that we know that's OK. Must have EGT and boost pressure in a race truck! I just thought some of you folks might like a cheap alternative - and readily available for many of us. Dan |
#7
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I've got the same gauge in my truck, and TD124
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#8
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I just bought a basic one on the bay of E, make sure you go for a mechanical one (eg the vacuum/boost goes directly into the back) - the stepper motor ones can give incorrect readings if there are any electric issues.
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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free! |
#9
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I have this EGT gauge and sensor in the 300D. It fits perfectly in the ashtray.
http://www.ebay.com/itm/EGT-Gauge-Red-LED-for-Exhaust-Temperature-Sensors-with-Weld-Bund-Combo-Kit-C-/251958514377?pt=LH_DefaultDomain_2&hash=item3aa9e5d2c9&vxp=mtr I had to get a separate NPT to metric adaptor to attach it to the manifold.
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CENSORED due to not family friendly words |
#10
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Quote:
Per their specs below, the threads are 1/8 NPT on the probe and weld bung. Is that a mistake and the threads are actually metric? Specifications EGT Probe Probe Material : Stainless Steel 304 Probe Diameter : 5mm (0.2) Probe Length : L1 80mm (3.15) L2 30mm (1.18) Threads : 1/8 NPT Adjustable Compression Fittings Cable Length : 2m (6.6) Cable Insulation : Fiberglass braiding with stainless steel overbraiding Type : Ungrounded Connector : Spade connector Temperature Range : -200 ~ 1250 degree Celcius (-150 ~ 2300 F) EGT Gauge : Display Range : -200 ~ 1250 Celcius Display Type : 4 Digit LED (Red) Dimensions : 79W x 43L x 25D mm (3.1" x 1.7" x 1") Panel Cut : 74 x 40mm (2.9" x 1.6") Accuracy : +/- 1% Power : 12VDC Weld Bund with Plug Material : Stainless Steel Threads : 1/8 NPT Outer Diameter : 0.5" (12mm) Length : 0.6" (15mm)
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#11
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Quote:
http://www.ebay.com/itm/291463706244 With the adapter its all bolt in.
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CENSORED due to not family friendly words Last edited by tjts1; 05-16-2015 at 01:09 PM. |
#12
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Quote:
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#13
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Not sure lots of Teflon tape is a good idea on a part that will see close to 1000f on a regular basis.
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CENSORED due to not family friendly words |
#14
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Quote:
Edit: DOH. You mean it fits into the ashtray, right?
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Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives. ― Joseph Heller, Catch-22 |
#15
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Quote:
The wire from the sensor was long enough to go all the way to the ash tray through the AC pipe hole in the firewall.
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CENSORED due to not family friendly words |
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