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Old 10-16-2002, 11:01 PM   #1
Red Rocket
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'97 4Runner

Default Help me choose a silicone intake pipe, and next intake mod....

During my VF29 install 2 days ago, I noticed that my stock intake pipe is quite torn up around the compressor inlet - time for a silicone intake pipe I guess!

I was going to go with a AVO pipe that goes all the way to the stock airbox. I'm currently using the stock airbox, with several DIY mods including the velocity stack, demeled grille top with snorkle in place, a spaced out fog light, and a K&N. I was thinking that by retaining the stock airbox and MAF tube, the ECU should remain happy. My intake mods seem to be working pretty well too, I should be getting mostly cold air, with fairly low restriction

The other day though, I took a close look at the MAF tube from inside the stock airbox. It's really nothing special, just a tube with a velocity stack at the end. So I had an idea. Hack the airbox away so that I'm left with just the tube for the MAF. Attach the "in" side to a large K&N cone filter with a silicone couping. Attach the out part directly to a shorter silicone intake pipe (such as the MRT, Samco, that make you use the stock accordian tube). There should be enough room for this under the hood with a long and thin cone filter. Compared to the above setup, I think this would be even lower restriction due to the elimination of the stock airbox and the use of a filter with much more surface area. However, I would be drawing in much larger percentage of hot engine air.

I'm not interested in a CAI, for various reasons - restrictions, MAF problems, long AL tube.

Any thoughts on what I should go with, and why? Anybody try anything like this?

Thanks,

Kevin
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Old 10-17-2002, 10:39 AM   #2
Red Rocket
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Default Bump...

Help?

Kevin
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Old 10-17-2002, 12:31 PM   #3
TCENGEL
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I had the same thought, but decided not to because once you hack up the stock airbox, it doesn't leave much room for the filter to go on. I have the same problem with the inlet pipe not mating very well with my vf-22. I am constantly re-clamping and need the silicone inlet pipe badly. Maybe you can buy a used stock inlet pipe cheap off someone who replaced theirs? Let me know how it all turns out. The Avo pipe does look a bit bigger than Samco.
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Old 10-17-2002, 02:10 PM   #4
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the AVO one connects from the turbo directly to the stock airbox. The samco one you still need that intermediate plastic piece to couple the turbo inlet hose and the airbox. zerosports makes a replacement coupler, but if you're gonna end up buying the zerosports piece and the samco, i would rather just buy the AVO and make it simpler.
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Old 10-17-2002, 02:19 PM   #5
TCENGEL
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Anyone install the Avo Pipe? How is the install. Do all the hoses mate up well. How good of quality is the pipe? Your comments would be appreiciated before I spend $350.00
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Old 10-17-2002, 02:28 PM   #6
tdxflex
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i don't have one, it's on my wish list. but you look like you will definately have to take off the intake manifold. i think some people were able to slide the samco one in but they had to break off an connection. i'm waiting until i have money for the AVO hose and parallel fuel rails so i only have to take the intake manifold off once.
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Old 10-17-2002, 05:36 PM   #7
Austin
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I hacked up an Injen CAI and did a similar thing. If you're going to go with a short ram, get the Samco induction pipe, not the AVO. The avo extends another 6" or so toward the fender well, which won't give you enough space for the MAF.

Or, you can just bite the bullet and get a MAP based ecu, and take the MAF out completely.
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Old 10-18-2002, 10:37 AM   #8
TCENGEL
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Austin,

Thanks for the pics. Thats about what I wanted to do. I have already hacked up my Injen. I heard though that the Samco pipes don't fit right. Has this been changed? Did the pipe screw up your air fuel ratios a lot? Thanks for the info.
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Old 10-18-2002, 05:01 PM   #9
Austin
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I haven't heard anything about Samco induction pipes not fitting correctly. Mine fit perfectly.

There are a thousand and one horror stories about Samco intercooler pipes not fitting entirely correctly.
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Old 10-18-2002, 05:36 PM   #10
AmSFighter
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Hey Tim, Hyperflow has a silicone induction/turbo inlet hose that's around $200-220; however, I contacted hyperflow and it seems that there's a back order or something.

I heard from someone that the newer samco's require the manifold to be removed while with the older ones, you can slide it in...not sure how true that is, but that's what I heard through the grapevine.

Hope this helps.

-James-
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Old 10-18-2002, 05:42 PM   #11
Red Rocket
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I've ordered the AVO pipe from wrxmotorworks. A little expensive, but I think my combination of intake mods and the stock airbox are worth retaining, for now.

I'll let everyone know how it turns out, I hear the install is a PITA.

Kevin
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Old 10-18-2002, 06:33 PM   #12
AKWRX
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Here's another Injen CAI-Sampco combination. This is the long Sampco version (not the shorter, smaller diameter "sport" model). SPO Motorsports was the source. The Injen was cut off about 4 inches downstream from the AFM. The long Injen pipe upstream of the AFM allows the air flow to settle down (less turbulent) for much more accurate AFM sensing. Also, the snorkel intake is still hooked up to dump additional air into the inner fender area since the very small air vents near the fog light to the inner fender really don't provide enough cold outside air. This combination works very well. Yes, the big Sampco (AVO) hose fits up just fine to the stock air box.
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File Type: jpg injen-sampco.jpg (48.8 KB, 141 views)

Last edited by AKWRX; 10-18-2002 at 07:17 PM.
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