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VDO Tell Tale Boost Gauge

Been looking for quite awhile for one. Before forking out $800,$1000 is there anyway to get them for a reasonable deal?

My biggest problem is I can't get over seeing these on eBay for $200 to $400 back in the mid 2000s. Paying $1000 for something that probably cost $250 out of the box is salty. BTW I've been looking for a good 5 months.


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Old 02-02-2017, 05:03 AM
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If you don't need the tell tale you can buy a new gauge from North Hollywood Speedometer (NHS). They were about $350 3 or 4 years ago...now maybe more.

Put a want to buy (WTB) ad here and see if anyone wants to give one up for less.

Rahl
Old 02-02-2017, 05:58 AM
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VDO Tell Tale Boost Gauge

I want the Tell Tale. I know that they are essentially the same gauge but the Tell Tale looks so much more like a tool than the non Tell Tale. I guess it's this functionality that attracts me to this aftermarket gauge.


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Old 02-02-2017, 06:19 AM
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Good luck

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Old 02-02-2017, 07:21 AM
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They are for sale,i found 2 here on Pelican.
And for less the you are willing to spend.
Had them restored by a ex VDO employee.
Still try to figure out how to hook them up to a 76 Turbo tough.

Old 02-02-2017, 07:31 AM
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Crotchety Old Bastard
 
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I bought 2 of those back in the day and both taddle tails broke within a year. Won't buy another.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 02-02-2017, 10:16 AM
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Quote:
Originally Posted by RarlyL8 View Post
I bought 2 of those back in the day and both taddle tails broke within a year. Won't buy another.
To much boost..
Old 02-02-2017, 10:46 AM
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Dwerkz,

I teed into the line from my throttle body on the back side IIRC.

Rahl
Old 02-02-2017, 12:16 PM
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Thx,i am having this intake.
Its correct for a 76'but in the past the tread was made for running a electric boost meter.
Would like to make something to use it there.
I am wondering how this tell tale gauge was hooked up at a 934.
Was it also at the back straight in to the tube,or trough a other connection?

Old 02-02-2017, 12:27 PM
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Crotchety Old Bastard
 
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Here is how/where I had mine connected, in place of the OEM boost sender on the intake/BOV. Used stainless hose to the cockpit.

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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-02-2017, 05:36 PM
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VDO Tell Tale Boost Gauge

Just bought one off a pelican NOS with reset key. Well now I'm excited my 930 has got some goodies this year. Sports seats, Momo prototipo and now this Tell Tale. I'm keeping all the stock items stored safely in my "Porsche Room" (mostly books magazines and posters). Anyhow I'll add pictures in the coming days.


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Old 02-02-2017, 05:49 PM
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Buy the black and white plastic check valve with a 8mm hose fitting for the brake booster and hook it up to that.. or T into the rubber hose where it connects to the steel pipe in the trunk below the cowl near the center. It's the same pipe that goes all the way through the center tunnel to the back.
Works the same and simpler than running another hose to the motor.
Old 02-02-2017, 06:44 PM
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Dwerkz, you might ask, user name Blackjack21. I think that is his correct user name. He has a rich history of Porsche race cars.

Rahl
Old 02-02-2017, 06:48 PM
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JFairman,

He has a 1976 930...no brake booster in the 75, 76 and 77 year cars. He needs to go from the engine compartment. Brian Bodart has a good solution.

DWerkz, you may want to grind off that bung and weld it back up to look like original. If you keep you eyes on e-bay long enough eventually one will show up. $500-$2,000 depending on how lucky you get.

Rahl
Old 02-02-2017, 06:53 PM
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Boost gauge install

Dwerkz,

I put a brass "T" fitting in the line from the bottom of the Throttle Body to the WUR. then ran another line from the "T" down the top of the transmission to the shift linkage tunnel and up to the front of the tunnel under the dash.

Picture bight be upsidedown?






Rahl
Old 02-02-2017, 08:33 PM
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I have a 2.0bar version I am willing to sell. still has the telltale but no key.

came out of a non-running 930 conversion, so no idea if it is in perfect operating shape or not. never tested.

I am planning to install a combo boost and AFR gauge where it was in the 'clock' opening.
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Old 02-03-2017, 10:12 AM
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Quote:
Originally Posted by Dwerkz View Post
Thx,i am having this intake.
Its correct for a 76'but in the past the tread was made for running a electric boost meter.
Would like to make something to use it there.
I am wondering how this tell tale gauge was hooked up at a 934.
Was it also at the back straight in to the tube,or trough a other connection?

Quite off-topic and cirious. I own 77 my self, I beleive that manifold is an early 77. The early 77 has the pressure sensor flange welded on, all magnesium as I understand, the rest 77 has casting all to the right.
I collected some years ago an early style 77 welded up manifold that now appears as a 76 manifold. I need to weld that flange back on to get to 77 model, and it looks like you have to grind yours off and weld smooth surface to get to 76 model. Being magnesium it is not that easy. Maybe we should exhange...

Example pics on the different models

76


Early 77


Rest of 77


I also was looking for a tail tale gauge for long time, ended up buying one on ebay for $800 (Auch!!) including the key. You mount the hoses just as with any other Boost guage.

Btw 75, 76 did not have brake booster, 77 did.
Old 02-04-2017, 03:49 AM
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VDO Tell Tale Boost Gauge

Quote:
Originally Posted by JFairman View Post
Buy the black and white plastic check valve with a 8mm hose fitting for the brake booster and hook it up to that.. or T into the rubber hose where it connects to the steel pipe in the trunk below the cowl near the center. It's the same pipe that goes all the way through the center tunnel to the back.

Works the same and simpler than running another hose to the motor.


I bought one from a Pelican NOS with reset key and install kit.

My 930 is a 79. I'm wondering how you would T into the brake booster line. Also this is a very important vacuum line so is it dangerous to run the gauge from this line (safety).

I'm interested in the T into the rubber pipe at the bottom of the cowl option. Where is this steal pipe located? Does it matter if the T is brass or plastic? Where is a good place to find a suitable T? Napa ect?






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Old 02-04-2017, 04:17 AM
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I got several PMs asking about this. as I cannot add pics to the PM replies I'll post some here.



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84 928S, Ruby Red linen/brown interior - preferred DD
85 911 Targa, White Gold/brown int - retired from track.
86 944 turbo my new DE/track car.
78 930 clone project car.
Old 02-04-2017, 05:46 AM
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Crotchety Old Bastard
 
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Why are these things so expensive? It's just a crappy simple boost gage, more toy than useful. I was never impressed with the two that I had. Also if they are connected to the BOV assembly you will only be recording boost spikes during chop throttle events. To record true engine boost you need to run the boost line to the intake below the throttle plate.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-04-2017, 06:13 AM
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