Installing Pedro's Hi-Flo Air Intake 986 2.5L

[jwade]

Why don't you just call Pedro and direct him to this post. I'll bet he can tell you.

[Pianohawk]

We've been in email contact. The collective experience of everyone couldn't hurt too, right? My wife and I did it! Those extra hoses don't lead anywhere. They're just for sound muffling. Pedro told me to get rid of them with the original intake tube and it turned out fine.

Now we just hope it continues to run the next couple days.... : )

Old Air Intake



Old Air Intake - In Car



New Air Intake

[chaudanova]

How did this turn out? Sound? Power changes?

[Lobo1186]

thats good it worked out well. I like my pedro mod So im hoping you will too. what parts did you use? pvc or aluminum?

[Pianohawk]

Originally Posted by Lobo1186

thats good it worked out well. I like my pedro mod So im hoping you will too. what parts did you use? pvc or aluminum?

We used PVC pipe. Took only 10 inches or so of PVC since the 90 degree rubber elbows were so big. It also took us 5 hours from buying the materials to getting it installed. I wouldn't recommend it to a fellow novice. There is almost NO space to move around in that engine compartment...very difficult to get these new pieces in securely. Of course, this was our first real mod (aside from de-snorkeling and hacking the top relay).

[Pianohawk]

Awesome mod, the sound is amazing! I fixed the J tube, no issues at all now. Going to clean out the TB this week.

Has anyone added a cold air intake filter system with this mod?

[Cloudsurfer]

Sorry, but I just can't endorse using plumbing materials from Home Depot on an automotive application.

Want to do this the right way? Get the appropriate sized silicone elbows, aluminum hard pipe, and silicone joiners.

Aside from that, on a stock motor, what is supposed to be the gain here? It's been proven that the factory airbox and filter flow plenty enough air for the motor, and inserting thick wall PVC pipe (which probably has a smaller inside diameter than the factory thin wall plastic) and Fernco elbows (the black rubber things) between the air box and throttle body is not going to get you any increase in air volume sucked through the throttle body.

[dsisco]

is this the hose thats goes from the TB to the MAF?

want to order just not 100% sure

thanks

http://www.fvd.de/us/en/Porsche-0/Boxster_986-13-41/-/1997/item/item_details/VID_16612144-VCD_56717405-gid_37-sort_4-display_50-item_100856000/ENGINE-Tuning-AirIntake-Power-Flow-Kits-100856000-air-hose-to-Power-Flow-Kit-900mm-x-60mm.html

[geekdaddy]

I did the Crios mod on my 1999 2.5 and desnorkled it. Still very tame and reasonable quiet but has a better rumble and snarl from the exhaust and intake.
I like the idea of removing the baffled OEM intake to increase and improve the sound during acceleration.
But I don't like the idea of using materials that may potentially fail in the application.

So I've sourced a stainless steel tube and cut it to size.
https://www.amazon.com/gp/product/B07BK23C2N/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
I also sourced some 3 inch silicone elbows, stainless clamps, and hi-temp insulation.

After trial fitment, I found the throttle body and air filter exit/MAF diameters are slightly larger than 3 inches. The elbows I sourced were built with 4-layer reinforcements, so they are not flexible enough to fit over them and secure with clamps.

I expect the plumbing elbows that Pedro recommended are flexible enough to stretch and fit. But they are also very large and not made of silicone. They may be good enough but I'd like to find something that enables a more compact fit and would prefer flexible high temp silicone.

I've located some non-reinforced silicone elbows that may work. After they arrrive I'll trial fit them. If I'm confident that everything will fit securely, I'll take some pics and share photos and links of the materials I used.

[geekdaddy]

New non reinforced silicone elbows arrived but did not fit well either.
I can stretch them over the air filter exit and the throttle body intake side.
But I don't trust them to stay in place. The factory intake is semi rigid and doesn't stretch over these areas. It "fits" over them and then is clamped into place. Because the silicone is stretched into position it really wants to slide off. The clamp will keep it mounted but I expect vibration and bouncing will cause it to slide off and it's not worth the risk.

So I will stay with the factory intake for now...

[Pianohawk]

Originally Posted by chaudanova

How did this turn out? Sound? Power changes?

Surprisingly, the idle is more steady than ever now. The tiptronic transmission is shifting really smoothly now too. Before it used to hesitate slightly when going into 2nd, fourth, and fifth. The sound is louder, especially when I accelerate. It added more bass resonance to the exhaust. Still trying to get used to it.

For now, it seems there may be slightly less power in the higher gears but I was afraid to drive it hard since I accidently disconnected one end of the J-tube trying to get the new intake in. Duct tape is the only temporary solution I had. I'm going to replace the lock on that end or the entire J-tube in a few days.

Give me a week and time for the car to adjust to the greater air flow and I'll post another update. Not sure which changes are permanent yet.