Project: RS2 ABY

[Ross]

The cone filter is all about the noise in my opinion. Goes hand in hand with big exhausts on small NA cars that create more noise and degrade the torque curve... If you want a bit more induction noise the BMC foam filter gives a little more, and hasnt fallen apart in my airbox. It did allow the engine to ingest some tiny foam bits from the bonnet liner which cause it to run like s**t for a few miles though.

[Sonic]

Thanks guys... i think that summaries it well and will not bother with it.

I need to set your status to "PRJ - quite literally just an air pump"

[prj]

It's the same as fitting a 300hp turbo and then running a 5" exhaust.
It does not matter how big your exhaust is, you are not going to gain any more power.

Exactly the same in this case. If the bottleneck is in a certain spot you will gain absolutely nothing by screwing around in other places.
The engine is quite literally an air pump. The inlet of your air pump is more than big enough to work with an air pump even almost twice the size, so no matter how much you increase it you are not going to gain anything else.

This is assuming there is any restriction in the first place and the pod filter even flows better at all.
Empirical dyno tests show this NOT to be the case on MANY different cars. This whole cone filter thing is a scam.

[Jamo]

There's nothing wrong with cone filters the problem is getting cold air to it as the OEM position it just gets hot air mainly from the manifold which is what Espen is saying.

[Sonic]

Thanks, it sounds like this mod isn't really worth doing then and your findings meet with what several others have said.

How come the cone filter seems to cause less power though, surely at speed the flow is increased and there's minimal heat-soak with proper shielding in place?

I do like the RS2 airbox, it's just such a PITA to get into with the clips

My initial thought was it might be a restriction on the inlet, but if that's not the case then i'll happily keep it over a cone.

[EspenW]

Some good plans there, but you wil almost certainly lose power with a cone filter.
Done power and temp measurements on the road of multiple cars, and the result is always the same, the powercurve gets visibly knocked down with the cone type filters.
The RS2 box is well designed and has very little restriction.

[Sonic]

The S2 is heading up to VRS later today for the latest round of mods:

Gearbox synchro's replaced
Front brakes sorted (maybe discs warped or calipers binding)
Billeted steel flywheel to replace the OEM dual-mass currently fitted
Aquamist kit for WMI (need to decide on separate tank or not)
7A cams and ABY pulley to replace ABY inlet / RS2 exhaust and vernier pulley currently fitted
Possible inlet change from RS2 airbox to cone filter if the airbox proves to be a restriction

Can't wait

[Sonic]

Love it Andy!

Luckily the s2 doesn't suffer from massively over-servo'd breaks like it's later cousins, but the pedal position is massively out. It makes the BMW a doddle to drive in comparison though, even if the brakes are less progressive and overly sensitive.

[AndyP]

You must have mutant feet if you can comfortably heel & toe with the S2 pedal box
I am having to modify my accelerator pedal to make it easier.

Me too, this is still a work in progress



Going to shot blast and paint it once I'm happy with the shape and position.

[Sonic]

You must have mutant feet if you can comfortably heel & toe with the S2 pedal box
I am having to modify my accelerator pedal to make it easier.

Be interested to see what you do with this as it is awkward in the s2.

I was thinking about how to change the pedals to make it easier.

[rynaqui]

You must have mutant feet if you can comfortably heel & toe with the S2 pedal box
I am having to modify my accelerator pedal to make it easier.

Not unless you drive in your socks, it works

Shoes aren't my kinda thing when driving

[snaak]

I do have a lightened 7a flywheel on my rs2 (~7KG) It drives perfectly with this flywheel.

[Error404]

You must have mutant feet if you can comfortably heel & toe with the S2 pedal box
I am having to modify my accelerator pedal to make it easier.

[Sonic]

this has gone way past RS2 ABY project....

Just want to stick my 2p in, I am not a fan of lightened flywheels either. I prefer the torque inertia given by the heavier wheel.
With lighter flywheel the Rpm drops way faster

That's what heel-and-toe is for

[Tonks4x4]

Just want to stick my 2p in, I am not a fan of lightened flywheels either. I prefer the torque inertia given by the heavier wheel.
With lighter flywheel the Rpm drops way faster


Tonks4x4 - The Land Rover Specialist