Installing Pedro's Hi-Flo Air Intake 986 2.5L - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Lobo1186 · 05-30-2010, 07:39 AM

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 · 05-30-2010, 08:18 AM

Quote:

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 · 06-01-2010, 07:03 AM

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 · 06-01-2010, 10:02 AM

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.

Lobo1186 · 06-01-2010, 10:50 AM

on the contrary...

PVC has a smoother inside for the piping and being thicker a naturally better insulate. (unless you buy some polished aluminum tubes (of course polished inside)

depending on the tubing you buy, the size is much wider than stock. in my case (I used PVC) the piping is wider through the joints and pipes than the TB. so the point is just to make sure the TB always has the necessary air. (also stock plumbing has baffles as a part of it) and if nothing else it changes the intake note so it sounds much better. and on these cars with the intake right behind the drivers ear that by itself is a high point.

the one downside to using PVC is that over time the heat can crack the plastic. but being so cheap it is no big deal.

in comparison I could spend 20 dollars on a nice breaker bar for those stubborn bolts... OR i can go to home depot and get some PVC and use my existing ratchet.

adapt and overcome and Home depot is your source for many things.

Pianohawk · 06-01-2010, 02:16 PM

Quote:

Originally Posted by 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.

You say it's been proven that increasing the air intake stock tube with a larger one doesn't increase air into the TB but you didn't give any source or cite any dyno or study. While I, from personal experience as well as from testimonials from several trusted porsche friends and mechanics, know that installing a bigger air intake = more air to the TB. Plus, after 12 year, the stock air intake tube was in pretty bad condition.

After installing pedro's hi flow air intake, my idle steadied significantly and my shifts into 2nd, 4th, and 5th gear are much smoother! Highly recommended mod. Try it Mr. Cloudsrufer before you diss what you can't personally substantiate. : )

Lobo1186 · 06-01-2010, 04:06 PM

and pianohawk another mod I might add that is simple and cheap is to repaint your grill vents. I see from your pic they are faded a bit. so were mine. but I went in there took them off scraped them down and repainted them and now they are pure black and pretty as ever! just a suggesttion.

it makes your car look much younger!

Pianohawk · 06-01-2010, 04:20 PM

Good idea. I've thought once or twice about it but am not sure how to take the grills off or sand them. What kind/brand of black paint did you use?

dsisco · 09-20-2010, 01:58 AM

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 · 07-12-2019, 02:27 PM

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 · 07-14-2019, 04:55 PM

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...