I have been looking around for a iac that will work with my haltech e8(one that doesn't mount on a manifold). I had heard that there is a few gm ones but the only one I have been able to find is the haltech one of speedmachine for $170.

http://www.speedmachineperformance.c...le+Control+Kit

Should I just go for the haltech one?

 

That is a GM stepper motor in an aluminum block with in/out ports.

Use the factory BAC. The stepper motor doesn't move enough air. I had that one and you would have to have your foot in the gas on startup to get things going. The factory BAC dead cold at 100% will spin the engine to 3K rpm. It also responds much much faster and once properly setup works better.

 

The stepper motor does move enough air. It's the design of the remote mount housing that's the problem.
With this housing you will get enough flow and it will bolt to the factory BAC valve location on most Mazda intakes.
I prefer to do it this way because I have better consistent results than with the factory BAC valves.




Available here.----->

http://www.accufabracing.com/throttle_bodies.htm

 

The BAC certainly needs to be tuned, and without a "self learning" capability on the idle control it can be a pain. But once its setup it works good.

I have a spare GM IAC, how much air does that thing move?

If you take over the stepper motor to manual contoll with the car set to idle below 1K rpm (say 600 when stepper is at 0), and and turn up the stepper to 100% how high will the engine go?

With the BAC it will go above 4K in my car with FD manifolds when the bac is set with a duty cycle of 100%. Dead cold (60 deg ambiant) with no thermo wax, the idle will go up to 3k or beyond if the cold start duty is set at 100%. If the stepper motor can with that block can do that I will certianly get one of those blocks and go to a stepper instead.

 

I doubt it will go that high. Never tried but then again never had too.
The good thing about the stepper motor is the response time make up for the lack of flow that's why they don't need to have a lot of flow to have rock solid idle. Plus the stepper motor is actually full 'closed loop' idle as they say because the ECU actually knows the position the valve is always at.
Thank God Haltech stepped up with the BAC control on the newer ecu's because on the older stuff it was hit and miss every time. The stepper motor do perform well on the earlier ecu's though and that's why I'm probably still found of them.
One of the best stepper motors availabe is the one from the Toyota 2jz motors. That thing have enough flow to rev the motor to redline.

 

Do you know if this adapter will work with an RE throttle body?