IAC on ITBs

**merc-blue** · 13-01-2007, 01:33 PM

Any one got any clever suggestions on putting a IAC on a ITB system? should i just weld in a bung in each runner for a line to the IAC valve?
or just not use a IAC?

Help would be handy

**Ben Wilson** · 13-01-2007, 11:56 PM

Originally Posted by merc-blue

should i just weld in a bung in each runner for a line to the IAC valve?

That's how Toyota did it with the 20v. It works OK if you get the runners the right size - On the 20v, they are about 1/4" or so.

I've got an evil plan to use a stepper motor to actually move the throttle stop - It will need some 'trickyness' with a sllding bellcrank arrangement and a remote TPS, but I think it might work.

**mrshin** · 15-01-2007, 07:33 PM

Once upon a time I, too, had an evil plan to use the moving throttle stop from an electric carb EA Falcon for a similiar purpose. Never ended up trying it yet, though.

**Celica RA45** · 15-01-2007, 07:42 PM

merc are you running a booster at all, just leave it as it is and run the booster of no 4 and leave the throttles all sepperate and use a carby balancer to set them up .on my motor all my throttles are seperate to each other

**merc-blue** · 15-01-2007, 08:11 PM

yeah it would only be fore the IAC valve so they would still be sepate just aith a AIC valve to control idle,
booster for now will be run off origional place as its a carbie manifold

**Celica RA45** · 15-01-2007, 08:25 PM

i not what you are saying but i still have idle about 890 rpm from cold till its warmed up and all i do is just spend a bit of time .ps if you end up using the 20 v quads which you wont they have a bleed screw so you can trim each cylinder as well

**merc-blue** · 15-01-2007, 08:27 PM

nah im using a set of injection perfection ITBs

**Celica RA45** · 15-01-2007, 08:32 PM

ok get a delco tps from a camira and also the switch the efi type that should get you out of the shit lokking at your pic there speed tech have new 1s