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Old 07-30-2002, 05:49 PM   #1
silvercharged
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Join Date: May 2002
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Thumbs up TurboSmart Dual Stage Boost Controller

I've just installed the TurboSmart Dual Stage MBC on my WRX, and apologize for no install pics, but you can see it at:
www.turbosmart.com.au

It comes as an attractive red anodized unit which measures 5 7/8" W. X 2 3/4" H. X 2" Deep. It has 2 boost dials built into the top to adjust high boost and low boost without having to use any tools. The dials are also 'detented' so that you can adjust the boost one 'click' at a time.

The high and low boost functions are controlled by a switch which can be controlled from anywhere you mount the switch in the cabin. A heavy duty toggle switch and 'aircraft style' safety cover are supplied, but I chose to use a heavy duty lighted marine toggle switch, which I mounted in the console in the blank switch plate just ahead of the remote mirror switch.

The unit also comes with very heavy duty red silicone hose to connect the unit to the boost 'tee'. The 'tee' is supplied, and is a special, gated, one-way directional type which is used to insure very fast boosting.

After installing, and adjusting the controller per the instructions, my car has been transformed! Boost comes on much quicker and much smoother, but I have not had ANY full boost at part throttle problems. If you want to get into it, you still have to push into the throttle, but the response is instant! I set the low boost to 9 psi for everyday driving, and the high boost at 16 psi, for "spirited" driving.

This controller is working great on my car, and I'd recommend it to anyone, as it really works as represented on the TurboSmart web site. BTW, my car is totally stock, except for A/F and boost gauges.

One last thing, evidently it's very important to properly disable the factory boost controller so that this MBC will work in harmony with the ECU. Per Dave Marriott at TurboSmart, the proper way to do this (and the way I did it) is to remove (with the factory tee and restrictors intact) the boost hose at the wastegate and the hose at the turbo nipple, then hook these together using a plain old nylon connector. (I used a 3/16" one) I then just tucked the hoses back up next to the factory boost controller. Supposedly 'fools' the ECU into believing everything is still connected as stock, as opposed to simply 'capping' off the boost hoses.

Well worth $150.00 (shipped) from ISR performance. Yeah, I know that seems expensive, but it also comes with a lifetime warranty!

Joe
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Old 04-18-2010, 10:19 PM   #2
turbosmart
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Great Review
Hope the product lives up to your expectations!
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