Boost controllers

[Cory9584]

I want to get a boost conlroller and bypass the stock boost control valve to increase my boost and bring it on earlier. Is there any specific type of boost controller or feature to look for?

[ae1969]

Hi Cory,

You have a number of options when it comes to boost control.

I am assuming the car in question is in stock form.

Concerns on any stock turbo.
- condition of wastegate. At this point the spring has probably seen better days.
- cyclic valve becomes brittle over time and a number of boost failures occur on this part.


In most aftermarket setup you will see chip/wastegate shims/boost controllers .

All three are an integral part when modifying boost levels as you plan on doing. The chips (fuel/timing) must correspond with the boost curve you plan to run............ and to optimize this the wastegate must hold boost.

Boost controllers can range from simple bleeder valves to electronic solenoids. Which is better depends on what you are trying to achieve.

[Cory9584]

What i want to do is replace the cycling valve with my adjustable boost controller, and at the same time ill change the fpr and whatever else it needs

[ae1969]

To answer your imediate question yes.......... you can bypass the cyclic valve. Would I drive it this way for long. No. In a stock setup you can't just turn the knob to 15 psi and go. That works only in the movies. If you had a bad cyclic valve and wanted to get on the road I would remove the cyclic valve and run 10psi if I needed to drive it.....

You are right an FPR is part of the equation. You need proper fuel pressure to go with the right fuel maps, timing etc that is coded into a chip.

The next step you are undertaking is a complete step. So its hard to buy one piece at a time.

You have a number of options when it comes to (vendors, products etc) ....

I will give you one option .........

http://www.vitesseracing.com/Catalog/944_951_968/Chips/chips.html

John is very thorough and reliable when it comes to supplying/shipping/support etc on his products. You will be presently surprised.

The only advice I can give you is to decide what your end goal is. Its very easy to just throw parts at something and then realize you wanted something different in the end.

Otherwise happy boosting!

[DannoXYZ]

I'd recommend getting an electronic boost-controller. Eventually you'll end up there anyway, so go for it the 1st time and save yourself some money and effort.

[gearhead290]

google mutha****a

[Cory9584]

I really want to stay away from the electronic ones because it gets cold in NJ and i dont want to run into problems. I also need to know what kind of fuel pressure regulator to buy and how much they go for. thanks

[DannoXYZ]

There's no problem with cold-weather and electronic boost-controllers. They use a MAP sensor to measure boost and the sophisticated electronics manage a much more consistent and flat boost curve under all conditions, compared to a mechanical one. WIth mechanical controllers, you'll get higher boost on cold days than warm and also lower boost at high-altitudes.

Additionally, you'll notice with mechanical controllers, that you'll get lower boost in the 1st three gears than in 4th or 5th. That's one of the side effects of mechanical boost-control. Also your boost-curve will be dropping in the high-RPM if you've got a K26/6 turbo (even some K26/8).

I've tried just about every single boost-controller on the market a long with all the wastegate options for these cars and I've only been able to achieve identical boost-levels in all gears along with a perfectly flat boost-curve only with electronic controllers.

[Porsche-O-Phile]

What he said; there's no problem that I can tell with the electronic boost controllers and I've been similarly reading up on these quite a bit lately. Cold shouldn't affect them at all; you can even mount the controller inside the cabin and run the cabling through the firewall if it makes you feel better (in fact, I'd recommend this).