Dejon 2 1/2 Intake Pipe Install

emitsu97 · Mar 21, 2003

Hi guys,

I'm trying to install the Dejon 2 1/2 intake pipe on my T25. I'm having a hell of a time getting the reducers on the turbo. Also, I've got three tubes left over from the stock intake. Any suggestions on how to get the reducers on easily and what to do with the left over lines? TIA

Brandon92DSM · Mar 22, 2003

emitsu97 said:
Hi guys,

I'm trying to install the Dejon 2 1/2 intake pipe on my T25. I'm having a hell of a time getting the reducers on the turbo. Also, I've got three tubes left over from the stock intake. Any suggestions on how to get the reducers on easily and what to do with the left over lines? TIA

The reducers were snug on my intake pipe for my 14B as well, but they did fit on there with a little bit of wrestling with it. Dont really know what to tell you on that one though.

The "extra lines" going into the stock rubber inlet acordian thingy can be eliminated or modified so they dont need to hook up where they used to. One line is from the PCV vent on the lower left hand side of the valve cover. you would be wise to run this vent to an external catchcan/breather setup to keep the PCV blowby out of your turbo/intercooler. For now you can just get a mini K&N filter an put it on the valve cover nipple. (After doing this your may wanna pull the Intercooler and clean it out with gas or some cleaner to get the crap out of it.

)
The other line would be from the EVAP/charcol canister underneath the battery tray. if you pull your battery out youll see what I mean. Just pull the line and pitch it in the dumpster...hell I took that whole charcol canister out of my car and junked it. Its useless crap.
The third line Is unique to 2G DSM's...my 1G only has the first two I mentioned. If you tell me where the line goes to I can probably tell you what it is.)

emitsu97 · Mar 22, 2003

Thanks!!

Thanks for the quick response. I'm trying to get this done between rain spurts and it's dark outside. I'll eventually invest in a catchcan but is it okay to just leave it as is for now? As for the third line, It looks like it connects to the BCS. GD these reducers suck!!

emitsu97 · Mar 22, 2003

???

Am I doing this right? Do I have to put two reducers on or just one? I'm starting to think that one is for a 16G or similar size Turbo housing. That SOB ain't fittin over the smaller reducer and that one was a PITA to get on the T25.

DrZiplok · Mar 22, 2003

Throw the reducers out and get a proper transition hose; you're just going to rip your hair out trying to fit thost stupid pieces of rubber hose over the compressor inlet.

emitsu97 · Mar 22, 2003

Well...

I said screw the second reducer and just tightened it down as far as it would go. Just came back from a test run and I noticed a fair increase in response. I can easily peg the stock 12psi now. The only thing that baffles me is that it seems to have slightly quieted my K&N but more so quieted my stock BOV. Toward the end of my juant the BOV seemed to begin increasing the volume of its sneeze again. I'll have to go again to see if changes anymore.

emitsu97 · Mar 23, 2003

Whay do I do with

the netal nipple still in the valve cover? I know you can attach a catch can to it but there's nowhere on the intake pipe for it to connect to.

Brandon92DSM · Mar 23, 2003

Re: Whay do I do with

emitsu97 said:
the netal nipple still in the valve cover? I know you can attach a catch can to it but there's nowhere on the intake pipe for it to connect to.

It does not need to be connected to the intake pipe in any fashion...you can simply buy a catchcan/breather setup and some silicone hose and mount the can somewhere convenient in the engine bay.

Actually Dejon Tool sells a nice simple catchcan/breather setup that would work fine. I use it.

Go ahead and do a Search for "PCV" and read up on some of the longer posts in the archive, and it should be enlightening.

doug · Mar 24, 2003

The one on the side of the valve cover (left hand side if you're looking from the front) is not the PCV line-- it's called the breather hose. Yes, it's related to the PCV hose in a way (which is on the back left-hand side of the valve cover), but they're totally separate hoses. And you don't need either one of them hooked up. Just let the breather hose hang. Eventually you can get a catch can for both that and the PCV hose, but for now just let it be. You can also unhook the PCV hose from where it plugs into the intake manifold and cap that off, and let the PCV hose hang too. You may want to get a longer hose for it, though, so that it hangs all the way out the bottom of the engine.

emitsu97 · Mar 24, 2003

How about the BCS hose?

I also have the upper line from the BCS just hanging out. I searched to see if there were any side effects of that particular hose not being attached and couldn't come up with anything concrete. I did see that not having the hose to the wastegate hooked up would be "bad" in that I wouldn't have any boost control but I still have the stock UICP and BOV, which by the way seems to hold up to 13psi for me??? I figured the BOV could be my fail safe for right now seeing as how it won't hold too much boost. Would an MBC take care of the hanging BCS hose?

Brandon92DSM · Mar 25, 2003

The BCS can completely be eliminated if you rig up a MBC , yes.

emitsu97 · Mar 25, 2003

Thanks Brandon92DSM, that's enough justification for me to go by another part

Xander · Jul 12, 2003

What if you don't have an MBC?

cbilmer · Oct 1, 2003

I just installed the exact same intake pipe.... the two reducers should fit fine?! Thats odd...

The BCS.... you could disconnect both vac lines from it... leave it be... but make sure to leave it plugged in.

As for what you can do for now until you get an MBC ( i just happened to have mine sitting around waiting to be installed) you could

1. Leave it be... and let your boost go uncontrolled
I wouldn't really do this unless you have the stock BOV

2. "just thought of something else....run a piece of vac line from your boost source (on the compressor outlet on a t25) to your wastegate. this should keep you really low, like 9-12 psi..." jmakado (from when i asked about all this stuff)

He Said to do that until i get a boost guage.. but the same would apply if you don't have a MBC yet... will keep your boost in check.

Hope that helps

CHeck my posting for more info: Click Here

I have pictures of mine installed including my MBC and my breather filter... check that out by Clicking Here

emitsu97 · Oct 1, 2003

Reducers

I don't know what the deal was with the reducers. I ended up only using the smaller of the two. I tried everything I could to get that damn second one on but no luck. I even tried heating it in my microwave, *which btw is not a good idea...at all* and got nothing but burned fingers, through heavy work gloves. I have yet to buy an mbc and have been fine since the original post. I even added a TRD exhaust and saw a nice 2psi bump but I'm still under 15psi.

cbilmer · Oct 1, 2003

You must have a boost guage then... i'm still waiting to receive mine in the mail... damnit.. but you should be ok then.. since you can monitor your actual boost.. me on the other hand.. well... gotta keep it near stock till it comes in.

As for the reducers... the small one went right onto the turbo inlet... the larger one went over top of that and clamped on...

Did you try maybe clamping it all onto the turbo without the pipe being around.... i got a better seal that way (i think)

Sounds weird though... it seemed to work fine here...

Oh, a word of note about that dejon tool intake... keep your rad piping OFF of it.. or use some of the extra foam stuff from the other piping to help put a barrier between the two.
(it helps insulate those other pipes, just cut some of it up and put it in between the rad line and the intake)

The heat from the pipe seemed to discolor the paint on the pipe!

doug · Oct 1, 2003

I got a 2.5" to 2.25" silicone hose reducer from Turbonetics. Fits like a glove on both the Dejon intake pipe and the T-25 compressor inlet.

Dejon 2 1/2 Intake Pipe Install

emitsu97

Brandon92DSM

emitsu97

emitsu97

DrZiplok

emitsu97

emitsu97

Brandon92DSM

doug

emitsu97

Brandon92DSM

emitsu97

Xander

cbilmer

emitsu97

cbilmer

doug

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