don't know much about boost controllers but one made by Split Second is the only one I have ever seen used on a b5/b5.5. No idea on installation sorry. Not much help I know.

 

Dawes Device Hybrid Manual BC...easy install. $45. www.dawesdevices.com

 

Why do you want to get a boost controller?
And what engine do you have?
Do you have a VAG-COM?
Are you willing to tread carefully and log data to make sure you don't *poof!* your engine?
I use a BC in my engine, so I can help, just need more info...

 

well was trying to get more power cheap. is it just safer to get a chip and go from there. thanks for the info so far

 

If you want more power cheap, you can get it with a BC.
If you want as much power as a chip, you're better off with a chip.
If you have a Drive-By-Wire (DBW) car, you *should* be able to get 13-14 lbs boost safely with a simple mechanical BC (MBC).
If you have the older cable-throttle AEB engine, it has severe fuel limitations and does not respond well to a BC unless you're willing to tinker like hell to give it more fuel.
The electronic BC's cost as much as a chip, so it kind of defeats your purpose.
If you get an MBC (the Dawes mentioned above is a good choice for the money, the www.boostvalve.com is a good choice for ease of adjustability, but costs more), hook it up inline betweeen the turbo nipple and the N75:

TN -> MBC -> N75 -> wastegate

This way the ECU and N75 still control the shape of the boost curve, and the MBC controls the max level of boost.

If you need more info, I'll be happy to supply.

 

I recently gave the Boostvalve a try on my '99 AEB, Tip. I was already running the Neuspeed 1 bar chip, but wanted to add the boost controller to keep the boost level more constant through the power curve. I does that well, but my car didn't respond well to the mechanical device interfering with the ECU/N75 valve's control of the manifold pressure. I installed it as Rusty indicated, and I adjusted the boost level to as low as 7 psi, so I am pretty sure I had sufficient fuel. The car consistently gave very rough shifts at throttle release when the boost level was higher than the ECU expected. I am guessing that the elevated manifold pressure is keeping the torque converter locked a few moments too long. If I was very smooth with the throttle release, all was fine, but if I needed to respond quickly to something, the car would give me a quick jerk as the transmission shifted. I couldn't solve the problem with variations in the installation so I have removed the valve from the car. If you have a manual transmission you probably won't have this problem.

When I started sketching the system and looking at what the boostvalve was doing to the ECU's ability to control the manifold pressure, I decided a mechanical boost controller wasn't a great idea. It would probably be better to install a more agressive N75 valve and use the Boostvalve in parallel with it to protect from overboost problems (this assumes that the car is chipped). This will likely be the next thing I try.

 

I have noticed that an MBC on my '98 AEB builds boost very quickly. Too quickly for the fuel system. I am not able to boost higher than 8psi without any bucking issues. If I have my aftermarket chip in, I have no issues with boost pressures higher than 1bar.

I would buy a chip if you want safe power. The MBC is not a bad addition once the potential for power already exists. I bought mine to eliminate boost spikes.

-Mark

 

ok sounds good out with the boost controler idea and in with chip. my brothers engine is an ATW i belive its a 2000 passat wagon. thanks for the info

 

I have noticed that an MBC on my '98 AEB builds boost very quickly. Too quickly for the fuel system. I am not able to boost higher than 8psi without any bucking issues. If I have my aftermarket chip in, I have no issues with boost pressures higher than 1bar.

-Mark

i hanve the same problem with my 98 aeb NO CHIP (currently saving) with mbc im not an expert on the 1.8t motor but i was thinkin that the problem would be fixed with a pressuer reg. for more fuel or somethin does that make since ill be driven on the highway and if the temp drops and i try to pass a car ill get the bucks and i cant pass is this common with this motor and how would i get fuel to the engine faster.

jamil

 

i hanve the same problem with my 98 aeb NO CHIP (currently saving) with mbc im not an expert on the 1.8t motor but i was thinkin that the problem would be fixed with a pressuer reg. for more fuel or somethin does that make since ill be driven on the highway and if the temp drops and i try to pass a car ill get the bucks and i cant pass is this common with this motor and how would i get fuel to the engine faster.

jamil

wow, next time try using some punctuation.. that was hard to read.
As posted above, Rusty has considerable experience with this situation (MBC, no chip, FBR, injectors etc.).. check some of his posts.