Project: RS2 ABY

[sidrick]

Nice pics Looks like you'll have your work cut out for a while to come.

[Greg_S]

Excellent weekend away had by all then. Shame about the mishap in the ditch.

Id keep hold of your RS2 airbox for a while as you may find its performing better with it than you think.

[prj]

Do not remove the RS2 airbox.

1. I am 99% sure it is not causing any inlet restriction.
2. A cone filter on the MAF will FUBAR your tune.
3. A cone filter will grab hot air from the engine bay and your power will drop.

If you think there might be a restriction, tee a gauge into the intake hose and measure it before taking radical action.

[Sonic]

Do not remove the RS2 airbox.

I thought that was what you meant?

Intake... hmmm. Well it's running wagner IC with reverse inlet, and the head is fully ported, so is completely optimised at every point apart from the airbox which is an obvious restriction with the 4" inlet along with the RS4 MAF diameter and the turbo inlet.

Go for 7A cams, inlet and exhaust. You will lose your surge and you will have noticeably more top-end power. Put them to stock marks, no adjustment.

Trust me, it will work just fine.

1. I am 99% sure it is not causing any inlet restriction.
2. A cone filter on the MAF will FUBAR your tune.
3. A cone filter will grab hot air from the engine bay and your power will drop.

If you think there might be a restriction, tee a gauge into the intake hose and measure it before taking radical action.

The idea would have been to put another heat shield between the exhaust/turbo and the inlet and direct airflow over it, but if it's going to make it worse then there is no point!

[prj]

Measure the pressure drop pre-turbo if you are so inclined, I am quite sure that there is no restriction there.

[A80Avant]

Here's a shot right after a bath....

Unless your car ate a small bird in the air box through your spirited driving sessions

[Error404]

Measure the pressure drop pre-turbo if you are so inclined, I am quite sure that there is no restriction there.

Slightly OT but Dmitri can you share your thoughts on the ballpark hp level that the RS2 airbox can support?

[prj]

Any turbo that fits with it in place

[Error404]

haha, thats good enough for me, thanks

[rynaqui]

I love the upgrade of the RS2 airbox vs the ABY one, makes such a difference

[Sonic]

Slightly OT but Dmitri can you share your thoughts on the ballpark hp level that the RS2 airbox can support?

Any turbo that fits with it in place

[andy10v]

I love the upgrade of the RS2 airbox vs the ABY one, makes such a difference

What difference did you notice?

[rynaqui]

Pickup is much better than with ABY box, even the lag is reduced in the sense that response when on and off boost is much more immediate and feels that much more urgent

Well mostly I've noticed the added intake noise as well, I quite like it

[prj]

Pickup is much better than with ABY box, even the lag is reduced in the sense that response when on and off boost is much more immediate and feels that much more urgent

It's all in your head.
The only place where there could be any difference whatsoever, is on top of the rpm range, and that's only in theory.
The reason being the engine is an air pump, and all limitations of flow on the intake side show up where flow is the highest, that is at and past the peak hp point, which will be around 6000rpm.

[Sonic]

Planned for the very near future...

Front brakes - either need to have the calipers rebuilt if there is a sticky piston or might have warped a disc already after my Wales trip.

Gearbox - need to drop it and open it to look but likely requires new synchro's to stop the grinding from 3rd to 2nd also exhibited on the Wales trip.

Flywheel - going to swap to a lightened 5.2kg billeted steel flywheel supplied by VRS whilst the box is out, replacing my heavy dual-mass unit but keeping the Southbend clutch i already have.

Cams / pulley - i'll be swapping the rs2 exhaust cam and vernier pulley for 7a cams and aby pulley. The rs2 setup has caused me no end of hassle and money and i believe to be the cause of my "low" top-end figures.

WMI - I have an Aquamist kit that'll be fitted for water-meth injection, bringing down IAT's and providing a little extra oomph!

Inlet - currently i have an RS2 airbox with K&N paper filter (after the Pipercross foam one was destroyed inside 6 months) but i'm not certain if this is a restriction. I quite like the airbox, but will test to see if a cone-filter + heatshield would be better and remove a possible inlet restriction at top-end.

Brakes - The RL handbrake is sticking and i'd like something bigger, with the obviously upgrade being the monoblock rear coupe setup with separate handbrake caliper, but this is going to have to wait due to funds.

The map will be tweaked for the cams, WMI and possible inlet changes and then it'll be good to go - hopefully pushing more around the 460-480bhp range (vs 431 on the last dyno) with the same 600Nm torque.