Dumb Accufab plenum Q: PCV fitting

[trinity_gt]

Just about to install the plenum and TB on the car (as soon as it cools a bit) and I notice that the PCV fitting on my stock plenum is a "fatty" while the fitting on the Accufab part is a "skinny". The plenum came with a new "fatty" fitting in a little baggy but it appears - and here's the Q - to require that the old fitting be removed and this new one installed in its place.

Is that what needs to be done? If so, what's the best way to remove the skinny fitting in there now? It appears to be something of a press-fit and has been sealed with a gasket-compound like material. Do I just put a pair of pliers on it and wrench it out, put some new gasket compound on the new fitting and insert it - perhaps with a few light taps from a hammer?

Any assistance or voices of experience much appreciated.

 

[Dark Knight GT]

This is the second thread I've seen about this today. I wouldn't know personally as I do not have an Accufab plenum. Are you sure the new "fatty" doesnt just attach to the stock one in some way ? Doesn't these things come with instructions that tell you this lol ? Bump.

 

[trinity_gt]

This is the second thread I've seen about this today. I wouldn't know personally as I do not have an Accufab plenum. Are you sure the new "fatty" doesnt just attach to the stock one in some way ? Doesn't these things come with instructions that tell you this lol ? Bump.

After I posted I searched and found another post from a fellow who'd installed his AF setup on a 97(?) who wanted to move it over to his newer 99+ car.

In his case I gather than the plenum arrived with neither fitting installed and he was able to choose which one he would use, apply Loctite and pound it in. In my case, the small fitting was already in there and the large one was in a little plastic bag.

I got mine from Sean Hyland Motorsports and it came with no instructions; just two large, gaudy stickers (that will look alright on my toolbench I guess), a bag containing 4 screws for the IAC and TPS and the adapter piece. I even had to guess as to torque values for all the fasteners...about the only disappointment. (Accufab's website doesn't have any on-line documentation either.) The Hayne's manual is remarkably useless for this information. Anyway, try as I might (without getting destructive), the small fitting would not budge out of the plenum, not by wrenching and not by using a drift punch. So I went ahead and installed the thing (which otherwise went seamlessly) and did this:

There's a fitting on the back of the TB to which a "skinny"-sized vacuum line fits. I snipped off about an inch or so of this line and connected one side to the PCV fitting on the plenum. The large adapter from Accufab slipped into the other side of this piece of vacuum line and the rest of the fat PCV plumbing to the adapter.

The fit of the 1" of vaccum line to the adapter is not great because it's a smooth cylindrical shape designed to be pounded into the plenum itself so I'll need to source a tiny hose clamp. Still, the fitting appears to be leak free for now.

So, problem solved. If I get some time this weekend I might drop by the dyno. SOTP impressions are very good. The intake sound has changed (sounds more gutteral now) and I swear the throttle response is better at low RPM...feels torquier to me. I need to drive it another day or two to cement these impressions and I won't even try to venture a gain value. Of course, the dyno will tell the real tale.

 

[Dark Knight GT]

Well, glad to hear you got it to work by improvision. Let us know how the dyno goes as I'm interested in the numbers.

 

[twogts4us]

Throw some gear at it and you'll love it even more. It love's to be above 3K, where it really pulls. The Accufab should have come without either PCV fitting installed. I wonder if you got someone else's return? The skinny one is for 99-01, the fatty goes with 02 on up GTs. I didn't use any sealant. Once I started to insert the fitting it was obvious it wouldn't want to come out easily, so I just continued to press it in. It's very tight and I'm not sure it would come out at this point. Any sealant would make this even harder to remedy. I'd be tempted to call Sean Hyland and ask them about this. This just isn't right to have to rig it as you've had to do.