tap the j-pipe or compressor housing for mbc?

[talontsiboy24]

Im just wondering what would be best to to tap the j-pipe or the compressor housing for boost?

right now my mbc line is going to my wastegate and the other line to one of my throttle body nipples the others are capped off and my gauge is showing 20lbs of boost at wot that i was tuned for but i think the throttle body is far from the turbo so i was thinkin to run that line to the j-pipe so maybe i will build boost alot faster?

but would that cause boost spike or surge if i tap the j-pipe?

i teed the bov line and ran the line there before and my boost gauge read only 11lbs but i went back and hooked up to my throttle body nipple and it went back up to 20lbs i dunno why? but i dont wanna tee the bov line cause thats not how u should do it i heard it cause the bov to not work properly.

 

[Deuce_three]

the compressor cover would be the best source, but tapping j pipe works great too.

I currently have mine tapped on the j-pipe. no surge or spikes at 18lbs.

 

[99gst_racer]

Use whichever is easier - they're both prime sources. Usually the j-pipe is easier. Just drill a hole, and weld in a 1/8" NPT bung. Here's how I set up Sewey's 2G:

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[steve]

I agree with Paul, I don't think there is any difference between the two so do what ever is easier.

 

[SexyDSM95]

If you tap the j-pipe, is there any certain measurement that needs to be followed? I.E. has to be at least so many inches up the pipe/away from the turbo? Or just tap wherever is convenient?

 

[LiquidX]

I would tap the j pipe personally as there is less chance for error i.e. leaving a burr behind or some metal shavings in the compressor cover.

The nipple can be placed anywhere in the j pipe to answer the above question.

 

[SexyDSM95]

^ Sweet, thanks! Also found this -

1/4" 1/8 npt nipple fitting, 1/8 npt tap, 5/16" drill bit (11/32" will do as well), thread sealant. Tap the J-pipe on a flat surface near the flange so you can grind off the extra threads with a grinder/dremel.

http://www.dsmtuners.com/forums/new...an-i-tap-my-boost-controller.html#post1716717

 

[talontsiboy24]

the compressor cover would be the best source, but tapping j pipe works great too.

I currently have mine tapped on the j-pipe. no surge or spikes at 18lbs.

so its better running it to the j-pipe then the intake manifold? i have one line going to my wastegate and the other to the intake manifold..i just hope my boost gauge still gonna be accurate as it was hooked up to my intake manifold.

 

[LiquidX]

so its better running it to the j-pipe then the intake manifold? i have one line going to my wastegate and the other to the intake manifold..i just hope my boost gauge still gonna be accurate as it was hooked up to my intake manifold.

Yes it's better off the j pipe as it's the shortest line. Your boost gauge will be fine with a longer line. The short line for the wastegate is so it opens when it should so you don't spike.

Here another example of how you would want your wastegate control for optimum response

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[talontsiboy24]

Yes it's better off the j pipe as it's the shortest line. Your boost gauge will be fine with a longer line. The short line for the wastegate is so it opens when it should so you don't spike.

Here another example of how you would want your wastegate control for optimum response

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i have a mhi big 16g turbo i dont have a wastegate like u have in the picture its stock.

 

[LiquidX]

i have a mhi big 16g turbo i dont have a wastegate like u have in the picture its stock.

Point is, shorter the line the better for the wastegate internal or external. With an internal gate you could have an even shorter line with the actuator being on the compressor.

Tap your j pipe, put a hose barb on it and run your vacuum line from there for a boost source.

 

[talontsiboy24]

Point is, shorter the line the better for the wastegate internal or external. With an internal gate you could have an even shorter line with the actuator being on the compressor.

Tap your j pipe, put a hose barb on it and run your vacuum line from there for a boost source.

so one of my mbc lines goes to the j-pipe and the other to my wastegate actuator right?

 

[LiquidX]

so one of my mbc lines goes to the j-pipe and the other to my wastegate actuator right?

Correct.

You don't need a boost controller either unless you plan on running more than the wastegate pressure.

On my current setup I have an E316g without injectors or a tune so I'm running on straight wastegate pressure of 10/11psi so I don't cause issues.

But to answer your question, yes.
Boost source(j pipe)===MBC inlet///MBC outlet===wastegate