6v92 on an MCI Boost Gauge fitting location?

[neoneddy]

I've done my homework, I found this post http://www.busconversions.com/bbs/index.php?topic=27514.msg302608#msg302608

I bought a VDO 30PSI gauge from Summit Racing, ran half a mile of 1/4" plain nylon airline from a convenient 1/4" FPT outlet on the side of the blower below the turbo all the way to the gauge, and got a kick from seeing it show 26PSI boost under full load.

I don't see any convenient  fittings.  I did find a broken v clamp on the turbo while nosing around there, Yikes!  Going to fix that right quick.

Any other vehicle I've had with a turbo, I've had  a boost gauge and found it helpful in gauging how hard the engine is working.  Now that I've insulated for sound and head in the back I only hear road noise.

So where would be a good place to make that connection or am I not looking in the right place? (I know after turbo, before intake manifold)   This is for a direct reading with a 1/4" air line, I don't think mine has capabilities for electronic readings.

[luvrbus]

If you have a top mounted turbo there should be plug on the left side looking from the front of the engine on the air horn close (has 8 bolts) to the blower they are hard to see and takes a 1/4 inch square drive to remove it there should be 2 larger plugs also 

[neoneddy]

luburbus: Ok I think  I saw an indent on the right side near where you'r talking about, but I was at the back of the bus looking  at the engine.   Is that the left side from the front as you describe?  Or is your front the back?  Now I'm confused :-)

[luvrbus]

LOL the front of the engine faces the rear there should be 2 plugs a 3/8 or 1/2 inch and the boost or ether injection 1/4 or 1/8 inch plug, the things are recessed so they are hard to spot 

[neoneddy]

So you're saying the front of the engine is facing the back of the bus and back of the engine is facing the front of the bus, but Who is on first?

[Iceni John]

Just remember to use an all-metal compression fitting and a few feet of 1/4" copper tube  -  that air is HOT.   As I found out, push-in Alkon DOT fittings and plastic air tubing don't work too well there!

John

[neoneddy]

Anyone know the specs on the fitting to use? Otherwise I'll be taking the plug to the hardware store.

Yeah I read others said to use a metal line for the first part then 1/4  was the rest of the way is fine.

[Iceni John]

Anyone know the specs on the fitting to use? Otherwise I'll be taking the plug to the hardware store.

Yeah I read others said to use a metal line for the first part then 1/4  was the rest of the way is fine.

As far as I can remember (which is less each year!) it is 1/4" MPT into the air horn, with a 90-degree elbow to direct the copper tube forward.   The air line is only reading pressure, not flow, so the restriction of an elbow won't matter.

John

[daddyoften]

The PO on my bus plumbed it in between the turbo and the blower  Doesn't work so good there.  I to would like to plumb mine in after the blower.  I have a 8v71 sideways since it's a 4107 so don't get me started on front rear up and down!!!!    Would the above description be the same location for me as well?

And let me tell you about plastic tubing in the engine bay  I have copper tubing ready to replace all the splices I had to do on the road just to get this home with the heat melting plastic!!!
Eric

[lostagain]

Mine is plumbed between the turbo and the blower, and that is where I want it. I want to see what kind of manifold pressure the turbo is putting out. I don't care about the blower, because it puts out a constant pressure, and not very much anyway.

JC