broda805

iTrader: (6)

im having a FFIM made and i was wondering what are you guys using for IACV? ive read somewhere that you might use a supra tt iacv easier? or something off a mustang? the TT same wires as the stock 2jzge?

is there a flange i can buy for the TT IACV? or is it pretty simple to produce?

i been searching for hours and cant find the same threads anymore and the few that are there the pictures have been taken down.

lexforlife

iTrader: (7)

unless you plan to use the stock ge throttle body , you must use the tt iacv.. the ge one works with chambers thru throttlebody , gte works directly in the plen.. once you get the proper radiused and bell mouthed flange welded onto your ffim , its plug and play... dont forget to buy the poppet valve , gasket and rubber piece or else it will not work

broda805

iTrader: (6)

Does some one sell the flange? And is the tt iacv plug the same as the ge?

HiPSI

iTrader: (2)

From what I understand, the GE plugs directly into the GTE iacv, although I "think" that an ems is required to properly adjust the way the stepper motor reacts on start up and idle etc etc.

broda805

iTrader: (6)

hm wow never mind TT iacv is like 400$+, going to get a machine shop to copy the GE flange and adapt a tube to it, i think that would be more cost effective

HiPSI

iTrader: (2)

I found one used for 100 bucks, just gotta hunt around SF.

Alot of the guys don't even use one and just tune a higher idle for cold starts, that's when the IACV is really needed is on those 30deg cold starts otherwise you'll have to hold the throttle for a bit till it warms up.

broda805

iTrader: (6)

well the guy who is making it wants to start producing it to sell, so easy plug and play install would be best where all you'd have to do is extend the wires of your existing iacv and relocate PS res and your good to go

Ali SC3

iTrader: (10)

you can also use the one off a mk3 turbo or an ls400, they are nearly identical to the TT one and utilize the exact same flange, you can find one used for cheap. only difference between those and the mk4 supra turbo is the angle the on the various barbs coming off of it, which makes no difference whatsoever. I would cut the coolant barbs off anyways and bypass it for a clean install.

SCereal

iTrader: (4)

Sorry to bump a necro thread but im going to be faced with this situation. I'm going to pick up a LS400 IACV (thanks yet again Ali for this money saving advice) and block off the IAC on my throttle body.

Looking at the LS400 unit it has 4 barbs on it. 1 big one that from what I guess it where it gets air from and I've read it can be just vented to atmosphere with a filter on it. (I'll be on MAP no MAF with JDM TT ecu) but what about the 3 other barbs? are they all coolant and can be ground off / plugged up?

Ali SC3

iTrader: (10)

the big one is where the air filter will go. the 2 small ones pointing away from each other are the coolant ones, and the one pointing up in the air is not normally there on the gte IACV and its either an air passage for a vac line that normally runs to the fuel rail on some motors for emissions or its an extra coolant line line but I don't think its a coolant line, you can tell for sure when you get it by seeing what passage its connected to from the other side. if its air just cap it off really good, or you can pull it out and tap it for a small plug, or even have it welded shut. if it turns out to be connected to the coolant ones, then just remove it like below. only have to cap it or plug it if its related to air.

for the 2 coolant lines, you can just clamp down on them with a vice grip or pressure pliers, and rotate it and it will come free as they are just pressed in. you don't need the coolant barbs on it and removing them is the cleanest bypass.

using a 7mgte one may be easier as it doesnt have that but its not a biggie. I haven't actually used the ls400 one but its generally the same. do note though that the gte ones have a round rubber check valve that sits between it and the intake to prevent boost from coming out. make sure the ls400 one has that or you will need to order those pieces from toyota. the mk3 section on supraforums is a good place to find some gte iacv's.

SCereal

iTrader: (4)

I ended up finding an excerpt from the FSM and it shows them as three coolant passages. The checkvalve is a good point. further research warranted.

Ali SC3

iTrader: (10)

excellent then you can just rip those 3 coolant passages out. I guess the v8 has an extra coolant passage than the I6 ones, but I say air is possible because that is what the 96-97 sc300's have an extra vac line off the IAC.

the check valve sits in the recess on your flange, not the IACV, so you should be able to just order it and it work as long as you are bolting it to a gte flange.

Kris9884

iTrader: (7)

ahh good to know for when FFIM time comes..

jwin

iTrader: (16)

reason why people tend to use the TT iacv is because its meant for boost so it has a check valve that goes with it. I would recommend getting a IACV from another factory boosted motor. 1jzgte or 7mgte. You can buy a TT iacv flange from beech performance and have that welded to your FFIM like I have done on my FFIM.