Today when I was putting my alternator back on. I looked at the intake and thought about putting one of my filters directly on the back turbo's intake pipe instead of having the hose come off. It fits alright, had to take the strut bar off to get it in there but clamped it and took it out for a drive and car was running 12lbs and now it's going 14-15 and spooled a lot quicker, Only thing I was wondering about is leaning it out and I have a profec b. Shouldnt' that keep it at 12lbs instead of letting it boost past it. I mean it stays around 15 to redline.
Anyways it's easy and obviously it works better than the hose lol Try it out.

 

Interesting! So, you just removed the rubber accordion hose and put the cone directly on the metal intake pipe?

I've always thought some more thought could be put into the intake design for the FD. The best intake for a turbo is a funnel - you want a relatively large filter with a large outlet that funnels into the turbo. This gives the turbo an unrestricted reservoir of filtered air to pull from. Look at the old F1 turbo cars from the early 80's - they had like 4" inlets that tapered down and funneled into the turbo.

Big problem with intakes, especially with the second turbo, is room. There's just not a lot of room in there to work with, especially with the strut tower brace and running pipe back to the second turbo.

BTW, you'll get a number of "but that just draws hot air so you lose power" comments . I'm not that big of a believer in cold air intakes, especially on turbo cars. If you can save a flow restriction for a rise in intake temps, it may work out to make more power one way than the other.

Anyhow, good post - that got me thinkin'!

Dale

 

I have seen dyno comparisons of cold ar intakes and short ram intakes. This was in some rice burner mag like turbo or something, but I still have always believed the results. The CAI actually made 2-3 less hp every time, and up and down the dyno graph. Obviously this was because they were causing more of a restriction, lowering the hp, more than any cold air could over come. This was also on an NA car, so the results would be even more drastic on a turbocharged car.

 

My bud alan has had his intake set up like that for about 4 years now. I have driven the car many times over the years, and it doesnt boost any quicker or have any kind of boost idiosyncracies at all.....

 

Yeah I just had a coupler and hose clamped it to the rear pipe. When I had my intercooler installed they put on some universal air filters for clearence reasons I think they're weapon r or some ricer bullshit like that but they work lol and it fits snugly right up against the strut bar. Next time I get my girl's camera I'll take a pic. It kinda looks better too, I can see the front turbo and the two filters line up together in the same directon kinda looks like a supra set up lol. And for heat it's still drawing from under the hood like it was and I have a vented hood and removed ac so the radiator works better without the condenser. It really doesn't get that hot under my hood. I dont know I was really wondering about the boost controller and why it's letting it boost another 3lbs.

 

I'd try putting the filter back on with the inlet hose and see if you lose your 3 pounds of boost, for testing purposes. That would eliminate any other possibilities.

Dale

 

yeah 3 lbs seems like an aweful lot just for eliminating a short ribbed hose

 

yeah thats what I thought too. lol on a side note i met up with the local domestic club up at the goodyear tire and went and ran some of them. Laughed at a SS camaro with mods, Cobra svt, 2 T/A's and a C4 with heads and cam/exhaust. Got some respect for the 7 tonight lol. Around here it's all domestic dominence so at least I went and showed them whats up

 

i had a similar idea but i actually thought about taking the whole metal pipe right off at the rear turbo intake ( theres two bolts back there) bolting on like a two inch flange and clamping on a small pod filter, I measured it all up ( while i was doin Non-seq) and 'yes' a small pod would fit in that space quite easily, i wondered how much dirt or crap might get in there but if the bottom tray is on it shouldnt be any more crap than normal.

 

any progress on this? just curious...

 

I have actually removed my hard pipe setup and have the front k&n filter clamped to the small black elbow piece, and I have the rear k&n filter clamped to a custom made mandrel bent pipe (thanks chuck!). I can definitely hear the turbos much more now, and the rear pipe seemed to make a difference in spool time---that stock pipe has two severe bends in it.

 

why put an intake filter right above the absolute HOTTEST section of the engine bay

 

I am working on a simalar setup as GoodfellaFD3s. I used another black plastic intake elbow from the front turbo and then used 2.5" piping from there. The plastic elbow actually points in the right direction. I just have to cap of the pipes that come out of it, or remove the front ones and use the ones hidden in the back. We will see how this turns out.



Alittle more info can be found in my thread. https://www.rx7club.com/3rd-generation-specific-1993-2002-16/quick-preveiw-opinions-whanted-516814/

 

nice custom job Brandon....