Inlet manifold

[RichardBaronGolf]

Hi there,

I am trying to get a bit more power from my Mk3 16v. I have already done a K&N Induction kit and full exhaust system (manifold back)

I was trying to think of things to do other than that which got me thinking, is there any sort of uprated inlet manifolds for the abf's?

Does fitting them require any remapping, i.e won't make the car run lumpy on standard ecu?

Thanks in advance,

Rich

[danny_p]

manifold is good for a few more ponies yet,

head work and cams or just inlet cam

[RichardBaronGolf]

Manifold is good for a few more? I've tried looking for a uprated inlet manifold but cant seem to find any By the way if someone had one on here i'd be interested!

I was thinking about headwork and cams, Although I saw someone say on here that ABF are no good for uprated cams because it makes them run lumpy on the standard ecu? I thought a remap would solve this?

[danny_p]

they seem to like a 266 - 268 inlet cam   doing the exhaust as well kills more torque than its worth, further than 260's with the cams will make it run rough   the ecu is speed density based  so generaly not compatable with long duration cams as they affect manifold pressure a lot and the ecu is then unable to accuratly calculate airflow,  you can map round it to a point tho.

reground inlet cam is much cheeper thana buying the pair of hrick cams just to use one of them.    don't know of anyone doing uprated manifold,  throttel body mods will give a few hp

[Metallix]

Remember that the standard ECU is mapped for the standard hardware.
If you make hardware changes & they work, it is pretty much a fluke.

Luckily the standard Digi. 3x ABF ECU calibration overfuels @ WOT from something like 4000 rpm upwards, so some of the changes you make to the hardware will make the engine 'breathe' better, making use of the richer fueling for the standard engine.

[MereKat]

http://www.golfgtiforum.co.uk/index.php?topic=202290.30

Someone (maybe on here) had a play with a shortened manifold with some form of positive result, but  don't think there's anything 'off the shelf' anymore

ABF's are/can be fairly expensive to get more power from...

[RichardBaronGolf]

Thank you for your help guys, Looking through the threads is like reading a horror story of what seems to be the most untunable engine ever built Unless you have loads of money of course!

It seems some sort of cam modification is the way to go!

[Metallix]

Thats not what I said.

ALL standard ECU are intended for the standard hardware.

If you change some hardware you may see a gain, but it won't be optimal.

Change the hardware too much and you move too far away from what the standard ECU calibration was intended for.

Best to match hardware change with some form of remap or control system change to standalone management.

[Khare]

I'd quite like standalone on it's own even. Proven to show good gains on an otherwise standard ABF.

[danny_p]

it's supriseing what you can make the standard ecu do.  not really worth doing unless doing it for the hell of it but you can make it run in alpha N or blended so you can run crazy cams or ITB's   if you count the time aftermarket is cheeper.

mapping it is a twerp but if you get an emulator it gets lot easyer as you can them effectivly write chages direct from laptop to the emulator module in the ecu without haveing to remove and rewrite the eeprom,  you only do that once happy with finished result and are removeign the emulator.   sadly you cant write on the fly to it so true real time mapping is not possible.

early ecu's have no checksum check so much easyer to piss with the maps on btw   pn ending with AB rather than BE    at one point i used to tune the engine useing standalone then translate the maps for the original ecu to lower costs and or stay within rules but can't be arsed with that now.

its very possible to get reasonable numbers from the ABF  going to have  to rock up at a club gti rolling road day and prove it some point,    place i used to work for sold engines among them were ABF's garanteed to make 200+bhp on anyones dyno.   it is possible with std intake but hard work.