Here's yet another ISR mod, did this this weekend after several trips to various places including Schucks, Home Depot, AutoZone and the local hardware store...

Used electrical pipe (3") from the hardware store for the main intake elbow from VAFM to TB

Here's my supplies...

3" pipe cut to length
3" rubber PVC couplings x 2
Brass barbs for hoses x 3
Cone filter
4" to 3" black PVC adaptor
hose clamps
5/8" and 3/8" hose/fuel line
plexiglass
small flat head screws
small metal strip for support bracket

OK, so removed the mess of an intake and all the silencer boxes and the entire canister. There's a lot of room when all that crap is gone! Measured everything up and started with the filter and VAFM; probably more work than necessary but it was fun to build. Used the 4-3" adaptor for size reference and cut a 6" square of plexiglass (1/4" thick I think?) with a jigsaw and used a drill to get the corners for the inside square hole that matches the intake side of the VAFM. Drilled all the holes and then a small hole to screw the two pieces together then once I had the first screw in place, I drilled the other holes with the adaptor still on the plexiglass (6 holes is what I used). I pulled the first screw out and pulled it apart and coated each surface with epoxy and screwed the whole thing together and let it set. Used the original gasket (this is my 2nd VAFM so the gasket is almost brand new) to mount this to the VAFM and original nuts with some added large washers. Drilled a hole with a 9/16" spade bit and used a 3/8" pipe tap to thread the hole and put in a large brass barb for the pre-VAFM 5/8" vacuum hose.

Put the couplings on the electrical pipe elbow, tight fit which I was happy with. I used some rubber rings out of a spectre intake tube that I had planned on using ($40 from AutoZone) to fill in the large gap in size between the VAFM/TB and the large coupling. I will be using the (expensive) chrome intake tube on my tacoma instead as it didn't fit in the 3.0... marked locations for the vacuum hose holes and drilled/tapped these using pipe taps. I also had to drill a 21/64 hole and use a 1/8" pipe tap for my alcohol injection nozzle (Devil's Own Universal Stage II kit, which I love btw.... 2gph nozzle...) and used a 9/16" spade bit for the other 2 holes as I don't have a regular drill bit larger than 1/2". It was close enough and used the 3/8" pipe tap to thread these; put the brass barbs in place and used some O-rings to help seal, probably not necessary though, they were tight. Once all the crap was mounted, placed the entire intake on the TB and cranked all the hose clamps down. Used a small metal bracket for some extra support using one of the existing holes from the original air canister. Cut new hose to length and placed them and zip tied them in place and done!

The 5/8" (larger) vacuum hose goes pre-VAFM, the smaller one (3/8") I put underneath close to the VAFM and the valve cover hose went on top near the TB where it was orginally. Basically kept the exact same vacuum diagram minus all the silencer boxes.

So, as expected, LOUD as hell at idle and not too bad at all on the road, not too loud when accelerating or cruising so not too bad. It does growl very loud at certain vacuum around idle and will frighten small children and some adults if they're standing nearby, hahaha

Much better throttle response, not a huge power gain but anything helps. It really does have more pep when you put the hammer down especially from a stop in first gear.

Not counting several parts I didn't wind up using, total cost was around $80 or so, a bit on the expensive side but I'm completely happy with my new set up. Oh yeah, btw, this is my band-aid while I wait for the time to drop a 5VZ in this sucker. the 3.slow has to go....

Also started on the 'big 3, or big 4' mod; just replaced the positive battery cable to the fuse box with 4g wire so far and already my rear window goes up and down a little faster! Can't wait to do the rest.

Now off to decide what to do next, 3.4 swap or 33's and gears & lockers.... hmmm....

 

wheres the pics???

 

here's a couple pics...

 

takes forever to upload the pics... they're pretty large size too, almost 2MB each

 

here's a better one close up...

 

How do you like the 5.29 gears?? I'm thinking about getting either 4.88 or 5.29 when I put my 33's on. What's your RPM's like, are they way up there? I like to drive 70mph on the highway

 

that looks great!! get some heat insulating paint on it and it will be tits!!!

 

Thanks, been dreaming of this mod for while, finally got the time. I was thinking about wrapping it with some insulated tape of some sort; didn't know there was a paint, pretty cool. I still need to build a shroud for the air filter to keep the heat and water out; found a galvanized chimney adaptor that fits perfect, will have to insulate that as well

 

picked up some aluminum sheet roll and some galvanized stuff from home depot for the air box to protect the filter, will post some pics once it's finished. I plan on spraying it with some insulating paint I found, it's kind of rubberized almost but will see how it works.

My wife tells her friends that I 'frankenstein the 4runner'... haha

It's amazing how many performance mods are available at home depot!

 

cool mod.. i've been thinking about doing this too.. btw, i wouldnt do 5.29s with 33s.. i have 5.13s in my ton's with 36s and its still way overgeared.. going to 40s to fix that problem

 

yeah, I think I will go with the 4.88 gears like most folks, don't plan on running anything bigger than 33's and I like to scoot on the highway too.

My tacoma has 4.10 gears in it and it pulls like a beast with stock 31's and before the S/C my rpm's were a little higher than I wanted in 5th.

 

why do people do the "ISR" mod???? whats wrong with the stock one???

 

I still need to build a shroud for the air filter to keep the heat and water out; found a galvanized chimney adaptor that fits perfect, will have to insulate that as well[/QUOTE]

isn't that kinda what the stock one does?

 

yeah but I don't have stock anymore. the stock intake sucks a big one from start to finish with all the turns and crap. it's not much of a gain but everything helps... more than anything else though, it was fun to build and does help. looks cool too...

my wife calls it 'frankensteining' the 4Runner, I love it

 

bumping my old thread... my ISR still rocks, still have not made an airbox but netting an easy 18mpg's, ha!

Also managed to stuff some HID's and ballasts around this thing; TONS of extra space in here now without the stock intake silencers.... don't even notice any extra noise anymore, she drives great.

Highly recommend this if you have a few idle hours to kill and want a more efficient intake.... figure the isolator box will wait until I swap motors... it's fun to build and looks much better if that matters... the 3.4 will look even better....

 

it removes as much restriction as possible from the intake tract making the owner feel like it matters,,, plus it sounds cool and gives you a reason to work on your yota.. duh

 

ha! exactly....... thanks!

too fun...

 

Love the ISR mods.... think of why people do cold air intakes for high end cars. Better air flow = power when you need it. Free up the flow in and out of the motor and you will find you gas millage goes up.

 

nice intake up grade. is there a tb sawp for a 3.0?

 

on this mod ....what is the angle of the electrical pvc pipe??????15*30*?????