UrS4 2.2T Avant project

[V6quattro]

are you combining a compressor with a turbo as you have two air filters?

Yes that must by it! I was already wondering why he has 2 air filters and asked in what range he would get more power this time

[quattro-nick]

yes,he also change his intake to make more room in the engine bay

[Thuppu]

Love your sherlock work guys.

[V6quattro]

love it! Is it a m45 or so? We also need more photo's!

[my2000apb]

WHAT?!?!?!? more details plleeeeeeease

[quattro-nick]

how is your boost circulation thuppu ?
from compressor outlet and turbo outlet to a diverter valve and so to ic and intake?
or from compressor outlet to turbo inlet and so to ic and intake?

[Thuppu]

It's an M90 (Jaguar x300).

It's a really simpple solution. Eaton outlet -> Holset inlet -> IC -> IM. There is a one way valve that by-passes the Eaton when the Holset need more air than the Eaton can feed.

[Majorcina]

Omg this is crazy Tomas.I cant wait for results

[macspring]

Pretty cool.

Read today in a new car mag that Audi are looking at electric turbochargers, so this arrangement you've put in place should do you for a while before you decide to upgrade to an electric turbocharger.

This 'twin' charger arrangement worked well on the Lancia Delta Intergale rally cars, so hopefully it does the same for you.

[pasbogdan]

You have the determination,you have the skils and you have the tools.And the thing i envy you most is you have the time
Your engine management will say:"wtf,why do i have to deliver more fuel at so low rpm??Some days ago i could sleep untill 4000 rpm.."

[quattro-nick]

thanks for the pictures thuppu!
first time i see a setup like this,do you have seen other cars that use a y-pipe and bypass valve like yours?
when is it dyno day?

[Thuppu]

Here is a setup that works just the same way. It's from our finnish btcf forum.

M30B34 + M112 + HX55.

[wug]

Very interesting Thuppu! Looking forward for dyno day. I am sure there will be more members going your way soon.

[Thuppu]

If everything works as planned, I hope to go on dyno quite soon. There may be a problem with the pulley setup and boost level. The crank pulley is 6.5" and the M90 has a 2.8" pulley, so at 8000 engine rpm's the M90 turns 18500+ rpm. That may not be a problem, as it hasn't to work when there is vacum on the pressure side as the Holset sucks so much air. But I suspect it will boost too much on low rpm's. There will be much heat if it tries to boost much over 1 bar. The boost pressure depends of how good my engine flows. If it boosts too much I have to get a bigger pulley for the M90.

[AndyP]

Epic

I wondered why you'd been so quiet recently!!