ABF intake upgrade advice

[Leon27]

Read this on CGTI and makes and interesting read:

http://www.clubgti.com/showthread.php?243845-16V-ABF-Intake-Manifold-Development-%28results%29

Wondering if anyone has done this on here or is considering it?
I want to keep my Anni as standard looking as possible, my only mods are Bilstein B6's and Eibach springs during my 2 years of ownership!

The bigger plenum on the inlet performs better but I was wondering if someone can explain something. Instead of cutting the manifold and welding it to create the larger plenum could you put something in front of the throttle to act as an air reserve or does it not work as well?

For example some BMW engines have something like this in front of the throttle, the N42 engine in particular has a part that possibly looks ABF friendly...

http://www.ebay.ie/itm/BMW-3-SERIES-E46-2-0L-ENGINE-INTAKE-PIPE-HOSE-/170914433136

Be interesting to try it as the air reserve section could be adapted to fit into the space where the cambelt cover is... but I'd try it only if it's worth doing.

I want to try and get the inlet manfolds matched and get the throttle body ramps done too. I've read about if you remove too much then you might get a jerky response so how much is too much to remove? Can doing just one ramp help?

Hope someone can help!

[Metallix]

The BMW part is a resonator to tune the engine noise.  Most likely to quieten it down/ stop a certain frequency or boom.
It has no performance benefit.

[tshirt2k]

Why not start the discussion on the forum you got the link from? Many tests have been performed on that setup. No one on here would have been that in depth i can bet. You probably wouldn't be able to exploit any benefits without using standalone management anyway.

Removing ramps will cause jerkyness due to the map needing to be modified to suit.

[Khare]

Interesting read.

[thai-wronghorse]

Interesting read.

Indeed it is mate, It'd be good to see some further testing and ideas on intake mods as it's something that potentially i could tackle myself.

[Khare]

Me too, especially shorter runners are it's an easy to do upgrade, no welding required.

[WOLF R]

The chap whose idea it was and myself are planning to test this final system, back to back on one of my correlation vehicles to see if there are any improvements, without and with adjusting the engine cal.

The vehicle that will be used is a MK2 Golf w/OEM Digifant 3.2 ABF unit. This car tends to test stable baseline at 150-154 bhp@6200ish rpm and ~144lbft@4600rpm.

[thai-wronghorse]

Would this only really be suitable for a standalone ECU set up or applicable to a OEM / chipped ECU to run without issues?

[thai-wronghorse]

Me too, especially shorter runners are it's an easy to do upgrade, no welding required.

As in just silicone hosing the two pieces back together?

[tshirt2k]

That was how the prototype was done with good results.