rob944s
New member
www.design911.co.uk click the currency you are paid in, look for performance parts in the menu on the left, click dsigntek air ram,was wondering has anybody fitted one, and does it work??? or what do you think...
AIRRAM INDUCTION KIT INSTANT BHP
- Thread starter rob944s
- Start date
sawood12
New member
I wouldn't waste your money. Any vortex action created by this fan will soon be quashed as soon as the airflow is directed around a few bends in the intake system and finally goes through the throttlebody and then split into four in the intake manifold. The best modification you can make to the intake system is to remove the biggest restriction - the AFM and replace with a MAF.
The engine management on the 944 uses a barn door type air flow meter. This is the thing connected to your air filter. It works by measuring how far the air flow can push open a flap. By it's very nature it causes a restriction to the air flow.
There are two alternatives to this:-
MAF - Mass Air Flow - which measures the velocity of the air passing over a wire or film.
MAP - Manifold Absolute Pressure - which measures the pressure of the air inside the inlet manifold.
The latter (if it works properly) is better at accommodating leaks within the induction, particularly on Turbos, as it ignores everything that has happened prior to arriving at the inlet manifold.
As far as vortex inducing air molecule atomisers that puff up the air volume by mixing in negative ions and then polarise the air steam so as to accelerate the atomic particles and increase velocity.............................snake oil! Sounded good though, I almost recon I could sell such a thing.
There are two alternatives to this:-
MAF - Mass Air Flow - which measures the velocity of the air passing over a wire or film.
MAP - Manifold Absolute Pressure - which measures the pressure of the air inside the inlet manifold.
The latter (if it works properly) is better at accommodating leaks within the induction, particularly on Turbos, as it ignores everything that has happened prior to arriving at the inlet manifold.
As far as vortex inducing air molecule atomisers that puff up the air volume by mixing in negative ions and then polarise the air steam so as to accelerate the atomic particles and increase velocity.............................snake oil! Sounded good though, I almost recon I could sell such a thing.
Diver944
Active member
The jury is out whether it will make an appreciable difference but it does remove the 'barndoor' flap that the AFM as so it will be more responsive and will remove a restriction. One of the changes brought in for the 968 was the introduction of a MAF instead of AFM.
Promax sell the Scivision MAF for S2 but I haven't seen any other vendors doing the same thing
Promax sell the Scivision MAF for S2 but I haven't seen any other vendors doing the same thing
sawood12
New member
You can fit a MAF to any car you want. Hooking it into the ECU is the tricky bit. As Paul has said SciVision do a MAF kit for the N/A 944/s and 968's. I'm not sure about any power claims but i've read the cars drive much more smoothly with much better power and torque delivery than with the old barn door AFM. I would imagine things like fuel economy and emissions would be better too.
The SciVision kit seems great on the face of it with it being an off the shelf plug and play solution, so far i've not been able to establish if the SciVision MAF works above 4krpm. Above 4krpm the barn door is fully open so the fuel is mapped against an assumed air flow and not measured by the device - therefore the voltage above 4krpm will be the full 5v all the way to the red line. Because the SciVision MAF mimicks the AFM input signal then I can't see how it gets around this issue therefore will not be acurately measuring airflow above 4krpm.
I'm tempted by the Vittesse piggy back system that can be tuned across the whole rev range.
Peter Empson
PCGB Member
I have been using the SciVision MAF from Promax for a few months now and the difference in throttle response is not subtle. I certainly wouldn't want to go back to an AFM now (the original setup didn't feel that slow to react, but it clearly was in comparison).
If you're just looking for more power I'd suggest you look elsewhere (it's something I suspect that'll really come into its own with other more major mods and a fresh remap), but for improved driveability I think it's a really nice add on to make for both road and track.
Best regards,
Peter
Diver944
Active member
If Vitesse do one with their piggyback 'standalone' system then you really will be able to take advantage of any decrease in restriction as the system is very very easy to tune for power yourself. For a really interesting power increase I think it would be excellent in a sleeved 3.4 litre N/A engine
At 175k miles our S2 will be due a refresh soon [
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