Motronic Mapping N75 or Manual Boost?

[URquattroGus]

What are the pro's and cons of mapping with a N75 and without?

I have the more robust (s2 bo supplied?) N75, so would hope it is less likely to fail.

The engine is built for 400-450bhp.

Thanks

[AndyP]

I sense this may not go well!!

Who is doing the mapping?

[URquattroGus]

Booked with MRC. Have considered at least one other that does not use the N75.

Why, have I opened a can of worns.....

[Dan]

Keep the N75 on and go with MRC.

[prj]

N75's work fine on 400+ hp cars.
Using the N75 you will have better spool.

Also:
If the mixture goes lean and there is knock, the ECU will be able to cut boost before your engine blows up.
If your timing belt slips a tooth, it will also be able to remove the boost before your engine blows up.

Comparing manual boost control with electronic is like comparing a carburettor with electronic fuel injection.

[Jamo]

Booked with MRC. Have considered at least one other that does not use the N75.

Why, have I opened a can of worns.....

Automark by any chance?

[quattro84]

N75's work fine on 400+ hp cars.

Comparing manual boost control with electronic is like comparing a carburettor with electronic fuel injection.

Or open loop to closed loop

[DJones]

Eboost2 with 4 way solenoid, remarkable bit of kit but not cheep..

[prj]

Motronic's boost control of 1990 is far more advanced than any standalone boost controller on the market today.

[Nuno Cristiano]

N75..

[cooperquattro]

Eboost2 with 4 way solenoid, remarkable bit of kit but not cheep..

lovely piece of kit

[cooperquattro]

Motronic's boost control of 1990 is far more advanced than any standalone boost controller on the market today.

we will have to agrree to differ on this one

[DJones]

Don't dispute that, but it cant give you different boost per gear nor is it adjustable by the none motronic minded peeps. and it controls my water meth injection.

[prj]

we will have to agrree to differ on this one

Please show me at least one controller with:
* Adaptive, mappable boost control based on RPM and TPS 3D maps.
* Adaptive, mappable per-cylinder knock monitoring
* Cylinder individual timing trim on knock events
* Knock event based boost reduction
* Altitude correction for boost
* IAT correction for boost
* Safe boost limit
And a myriad of other features.

There is no standalone boost controller offering this, that I am aware of. Of course today's ECU's come close, but not all.
Also, having the same boost in each gear is the "holy grail" of boost controllers... for obvious reasons.

[DJones]

Please show me at least one controller with:
* Adaptive, mappable boost control based on RPM and TPS 3D maps.
* Adaptive, mappable per-cylinder knock monitoring
* Cylinder individual timing trim on knock events
* Knock event based boost reduction
* Altitude correction for boost
* IAT correction for boost
* Safe boost limit
And a myriad of other features.

There is no standalone boost controller offering this, that I am aware of. Of course today's ECU's come close, but not all.
Also, having the same boost in each gear is the "holy grail" of boost controllers... for obvious reasons.

I can name you one that's unreliable...

I'm not disputing how good the N75 motronic system is but its certainly not the most reliable. I have replaced seven in my ownership of high powered Audi's and the majority have produced boost spikes when shot.