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Discussion Starter #1
Hello everybody, just wondering how you guys did your boost controllers, I'm trying to figure out where to get my pressure reading, since i have custom hardpipes with no nipple for a boost controller, I've been told you can get a pressure reading directly front the turbo, where on the turbo would that be (t25), or just where is the best place to put it...
Thanks in advance! :)
 

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Pivot 180
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Nissan T25 doesnt have a nipple on the compressor cover. My advice would be to either get a nipple welded on the hotpipe or just drill a hole into the hotpipe and tap it and screw in a nipple.
 

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Joel said:
Any reason why you are using a boost signal for the controller thats behind the throttle plate?
I want to measure and control boost from a point which is as close to what the engine is experiencing as possible. I chose the largest port on the intake plenum (other than the power brakes); the one that goes to the charcoal cannister.

Before I got the Profec B, I was taking the boost to the wastegate from the same point without any problems. I was very cautious when I first hooked the Profec B up, since there is a possibility of hysteresis between the turbo and the measuring point which could cause oscillation in the boost (in my mind anyway). I never saw any.

I was concerned because before I installed the Profec B, I measured the boost at both the turbo and the plenum (with the same setting on the wastegate), and saw 8psi at the turbo at a measured 6psi in the plenum. This is due to the restriction of the intercooler (and to a lesser extent the piping).

Lew
 

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Pivot 180
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Hows it running? Any problems with it this way?
If none then im sorry jdm240sx, you wont need to modify your piping.
 

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Discussion Starter #10
hmm, been out for a few days sorry for not replying. Thx for the help gonna try that stuff soon, the reason I said I many need new pipes is because they have no nipple for the the bc, they are custom done from aerodyne...
 

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Joel said:
Hows it running? Any problems with it this way?
If none then im sorry jdm240sx, you wont need to modify your piping.
It runs very well. I use 6.5# for the low setting which doesn't spin the tires in 1-st when the boost comes on. I use 9psi at the drag strip which is pushing the limits of the stock MAF/370 injectors. I have had zero problems with the engine since I turboed the car in 8/1999, except for detonating at the drag strip due to the stock fuel pump being inadequate (blew the electrodes off two new spark plugs 3/4 down the strip).

There are no problems with boost control on my car.

Lew
 

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Discussion Starter #13
Cool, I have stock inj 370cc, but I have a walboro fuel pump, so that helps a little, I got the pics, but I have to reinstall the photo software b/c I redid my comp in xp...
 

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Discussion Starter #14 (Edited)
okay, the software does not like xp, ill dl the images from another comp...
sorry for the delay...well the disk i burned is corrupt, great, got to burn another, and then find a place to host the pics...if you know of any site that would be great!
 

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Discussion Starter #15
Okay here are the pics, they are blurry b/c i have an old camera and an unsteady hand, I also had to rezise b/c they were to large. If you have any ques about them feel free to ask...

http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1499.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1498.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1493.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1491.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1490.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1489.JPG
heres some pics for my car
more to come in a sec, still gotta organize them...
 

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Discussion Starter #16
okey here are some interior shots
basically stock inside, save for greddy boost gauge and pivot shift knob
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1495.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1464.JPG\
this is how i have the gauge line done, throught fender hehe
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1465.JPG
Boost Controller
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1467.JPG
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1468.JPG
also done through fender (controller)
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1470.JPG
and heres a really bad engine shot
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1471.JPG
more engine shots with vaccum lines in a sec
 

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Discussion Starter #17
okey time for vaccum line shots
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1472.JPG
this one is a T from boost gauge line, bov and the bov line that runs over to the top of throttle on intake manifold
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1474.JPG
line to wastegate, note: this is fuel line, not sure if that makes a diff b/c it is pretty close to 6mm
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1477.JPG
stock solenoid valve, plugged the vaccum line ends and disconnected them, still plugged in electronically though, dunno if i should unplug it...
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1479.JPG
one trust line, other fuel line b/c didnt have enough trust line, ill prolly replace fuel line with 4mm though
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1481.JPG
This is where i put the A end of the solenoid b/c I have no nipple on the charge pipes, the stock solenoid valve was also wired to here...
One more batch to come
 

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Discussion Starter #18
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1475.JPG
from this pic you can see the blue line goes to a nipple i showed in previous pic, the black one goes to wastegate, the other line goes to the T in the fuel pressure regulator as shown, this one is from the actual controller unit, the vaccum line with the red tip going to the intake manifold is the bov line...
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1478.JPG
In this pic you can barely see disconnected line from stock solenoid valve that was supposed to got to nipple that the blue trust line goes to.
http://xs.to/xs.php?h=xs15&d=05064&f=DSCN1484.JPG
this is a slightly clearer view...
sorry for the bad pics and thanks for the help!
so if anyone can help that would be great!
 
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