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Thread: DNP Hard Pipe Coupler Questions...

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    Question DNP Hard Pipe Coupler Questions...

    I picked up a used set of DNP's without couplers.

    I have ordered 10 2" couplers and the TB reducer.

    Can someone tell me if I need another size/reducer for the IC or front turbo connections and what it is?

    Much appreciate any help...

    Bill

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    That's what do you will need:

    1 3.0" to 2.75" Silicone Coupler Reducer Turbo
    4 2.0" Silicone Straight Coupler
    4 2.0" Silicone Hump Hose

    I take all them on votionspeed.com

    Hug, Chris

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    Eight 2" couplers is wrong; completely wrong. First, there are 9 couplers, not including the TB one. Second, the ones between the DNP piping and ICs is of a reduced size (the piping kit tapers at those connections).

    IIRC, the connections are as follows but I'll admit that I'm not 100% sure this is accurate (hump connections are a personal preference and not required; I used all straight or reduced connections):
    4 2"
    4 1.75" to 1.5" (piping to IC connections)
    1 1.5" (front turbo to piping connection) - I am least sure about this one, it has been several years.

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    Quote Originally Posted by AlmosN8kd View Post
    Eight 2" couplers is wrong; completely wrong. First, there are 9 couplers, not including the TB one. Second, the ones between the DNP piping and ICs is of a reduced size (the piping kit tapers at those connections).

    IIRC, the connections are as follows but I'll admit that I'm not 100% sure this is accurate (hump connections are a personal preference and not required; I used all straight or reduced connections):
    4 2"
    4 1.75" to 1.5" (piping to IC connections)
    1 1.5" (front turbo to piping connection) - I am least sure about this one, it has been several years.
    You right. Sorry.

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    Quote Originally Posted by Chris View Post
    You right. Sorry.
    It's cool man (I think I came off a bit smug when I re-read my post, sorry about that, it wasn't my intent). I also tried the "all 2" connections" at first myself which is why I know it doesn't work. Unfortunately, at the time I installed my piping kit, I was in a rush and didn't have time to wait and order the proper couplers, so I ran down to the local parts store and bought some radiator hoses that had the right size reducers on them (cut the section off that I needed) and have been running them ever since. Yeah, I know, completely ghetto but they hold and they're all the connections that are buried in some way so you cannot see them.

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    I changed my order from Columbia River Mandrel Bending, aka Vortex Induction Sports, aka siliconecouplers.com.

    Hopefully they get the memo before sending out. If not, a trip to Saint Helens is in order...

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    As said already, the DNP pipes taper off to stock size at the end of them. So you need 1.75" couplers. OR, you could do what I did, and cut off the taper and weld in just straight 2" and then get a 2" intercooler set up, and you can have a FULL 2" charge piping setup. You can feel more power. (less restriction, more cfm at same psi)
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    So, What size are the IC pipes? Do I need 1.75 to 1.5 reducers?

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    Oh man, I had a thread just like this back at the other site a month or two ago and got no replies...

    Basically I ended up ordering all 2" couplers which was an obvious mistake. I still want to replace the rest though, so I'm also very interested in the sizes required.

    Thanks!

    -Caleb
    . 1992 VR4 - Java Black Pearl paint (2004 STI) with combo '92/'96/'99 custom front end .
    . Fittipaldi Force or 5Zigen FNO1-RC wheels . Cianci rear strut bar . K&N intake . DNP pre-turbo hard pipes . DNP hard intercooler pipe kit . Greddy Type RS BOV (recirc) . HKS EVC Black Limited boost controller . Vacuum reduction with all silicone pluming . EGR block off plates . Hot wired fuel pump . AEM AFPR @the rail with Robbeck adapter . Fuel rail loop . Tanabe knockoff down pipe . No cats . Single Turbo Flamer full 3" cat back . RPS Max pressure plate with street disk . Seattle92VR4 solid motor mounts . '99 Lifters . R1 Concepts slotted rotors . Supercar Engineering brake caliper stiffening bolts . HHH data logging . Red Line fluids .

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