Rob Beck 13T compressor inlet question?

I have two RB 13T's.while fitting the pre turbo piping, I had to remove the rubber reducer ring from the stock pre-turbo intake piping to get them to fit over the new compressor inlets. I noticed while looking at the 3sx pre turbo intake pipes that only the 19T's and DR750's are supposed to have the 2inch inlet. Is this something Rob changes on these? the compressor serial is 49377-04300 which is TD04L 13T/6, I didn't buy these direct from rob, so idk what all he does to them any help is appreciated thanks.
"The spacers are required for stock turbos, 3SX Eliminators and Executioners, 13g/13t, 15g, 16t, DR550, DR650, and other "stock housing" TD04 turbos.

The 19T and DR750 turbos have a modified compressor housing inlet with a 2-inch outer diameter, so the coupler will fit right on the turbo without the use of the spacers." this is direct from the 3sx site.

I have 13T's from Rob Beck himself and I had to take the spacers out. The TD04 13T's from a Subaru WRX, use the 2in inlet.

exactly, the 13T turbos are NOT stock housing. The inlet outside diameter is actually a little bigger than 19Ts IIRC.

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Originally Posted by blindmist

I have 13T's from Rob Beck himself and I had to take the spacers out. The TD04 13T's from a Subaru WRX, use the 2in inlet.

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:smartie: Just a larger compressor housing. If you're worried about dust getting in there, do a couple of wraps of shrinkable electrical tape on there to seal it up nicely without folding. Of course this is assuming that yours are stretched like most I've seen :p

Even with the inserts removed my intakes were a swine to fit over the WRX compressor housings.

I'm going to bend some aluminum pipe and make a hard pipe kit, and it will allow me to get rid of the vacuum lines and it's a lot cheaper than the 3sx kit

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Originally Posted by KeithMac

Even with the inserts removed my intakes were a swine to fit over the WRX compressor housings.

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Mine slide off and on just perfect like it was meant to be that way to begin with after the inserts are removed. I don't know why yours would be different.

You will have to take out the spaces.

Though I would recommend picking up some hard pipes from Dejon or something similar.

I can't tell you how many times my oem rear turbo intake pipe blew off. Annoying as heck, hard pipes solved that issue.

-John

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Originally Posted by J-Groove

You will have to take out the spaces.

Though I would recommend picking up some hard pipes from Dejon or something similar.

I can't tell you how many times my oem rear turbo intake pipe blew off. Annoying as heck, hard pipes solved that issue.

-John

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how do they blow off, this is a vacuum line?

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Originally Posted by dpartinvr4

how do they blow off, this is a vacuum line?

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I always wondered that as well. But it never failed, every time I got on it hard I would blow off the rear one.

-John

Surge FTW. When you let off, most (actually all because nobody seems to set them right thinking it's supposed to be closed at idle) aftermarket CBPVs don't release enough air and the rest stalls the compressor and blows out the intake, blowing off the intake pipe if it's not tight. Wouldn't surprise me at all if this was the base cause for a lot of people's smoking on decel problems with stock style PCV systems, 2 psi in the crankcase is more than enough to push oil past turbo seals when letting off. Just a random thought.

if you have open atmosphere bov and a draw through maf you have to set it to be closed at idle or you will be drawing in unmetered air.

False. At idle air continually blows OUT the BOV, not in. Even at idle the turbos are putting out way more CFM than the IAC is letting past the closed throttle, think about it for a second. If you still don't believe me, remove the BOV, start the car, and put your hand over the hole, there is really no state where air can get sucked in with our relatively tiny turbos. Open the throttle, vac drops and BOV closes. At startup, not enough vac and BOV is closed, ect.

Will you have to tune it out, yes, but it's doable as I've done it. You either deal with one problem or deal with another, no such thing as a free lunch when running those valves. Ditched my SSQVs for an EVO CBPV and couldn't be happier.

in or out the point is I want to meter the air coming into my engine. It is up to you I guess, but it won't work out of the box the way you suggest setting it up.

Thanks for the explanation though it made sense once I remembered that there is only vacuum after the throttle plate. That also explains why the too loose of a spring on my Tial right now causes the car to run rich on off throttle coast down decelerations instead of lean like you'd expect.

I have an eBay BOV that is an imitation of the RFL. Works great for the past 3 years some how. I guess I just really lucked out. It still holds 25psi just fine. I have never blown off my pre-turbo pipes.