bludgod

iTrader: (3)

when the ECU is controlling boost yes it can reduce boost based on knock sensor. The bleed valve there is just a manual version of the standard 2port - all it's doing is bleeding off air on the way to the wastegate.

boosted

I'm aware the ecu can, what I'm asking is can all the aftermarket electronic controllers the OP listed do that?

Maz

iTrader: (34)

Superchips made a living out of selling glorified bleed valves coupled with fuel cut defencers, then passing them off as 'mapped chips'. They were not mapped just the boost upped to the point where AFR was just within what the ecu could handle. Precisely what boosted has done except he hasn't paid someone several hundred pounds for it. It's a cheap and easy way of gaining power but only if you know what you're doing.

bludgod

iTrader: (3)

oh no i wouldn't think any of them would have that kind of tech

bludgod

iTrader: (3)

yes - but a bleed valve is unlikey to provide you with full boost at part throttle if it's setup well, it will be more likely to increase boost across the board.

boosted

So if it's electronic or manual the risk is the same.
I'll stick with my reliable ball bearing system!

bludgod

iTrader: (3)

oohhhh yes sorry I thougth you mean if they could reduce boost when the car pinks. They do have features over and above the MBC though, the AVCR has inputs for throttle control and can determine gears as well (based on RPM) so you can get a much broader range of control.

Some of the blitz ones have an additional input as well, you can use it for vehicle speed/throttle input/maf reading etc. and have the boost adjusted based on that.

But to determine what's best for an individual setup it's up to the end user to decide what they want from it and what they are happy with. Your happy with your MBC and if it's meeting your needs then you can't argue with the value for money.

Dubzy

iTrader: (4)

I have an Avcr controlling my boost and its a great bit of kit. It allows me to instantly switch between 2 boost settings and also has an off/valet setting which then only runs at actuator pressure which is handy if you have to leave the car with anybody.

Its also a good tool for setting the boost levels for each gear and u can set a boost curve on how smooth or agressive the boost comes on which is handy for different road surfaces. In cold weather it will also detect and pull back any over boost. It creates a very flat line on the boost display on the dyno screen too so controls boost very well.

Andy Forrest still recommends an avcr on his tuning guide when taking boost above 1.5 bar.

gaborpapp

So much off topic guys. Please keep to the question, and who has and wants to use his "magic self adjusting ECU", go ahead, and call me when you need a rebuild.

Tidgy my ecu is mapped and i got 3 port solenoid too etc. Probably the ramp-up is too fast from what i can see on my car. there is literally no lag because I start getting boost from about 2k rpm and at 3.5k is reaching it's peak. Combine that with nos in 3rd gear or 2nd gear and the boost gauge looks like it about to shot a rocket out of the pin . this then results in boost spikes because ecu just can't control it fast enough. Two different mappers mapped my car, (i am happy with both) and both said i need better boost control. (it's good now, all under control, but it could be better).

Dubzy - Finally someone on topic. Thanks. I heard they are good, i suppose that's why they are still so expensive. However I want to get the opinions on the other-ones too. I was also looking at that Blitz one, that dual solenoid valve stuff sounds promising. (+ the A/F ratio display). New is $1075 and I can get one for £300.

Last of regarding the Valet/Off feature of AVCR - I usually set my rpm limit from apexi to 2.5k and boost to 0.5 (minimum). Nobody can give it a trash in this way lol