Cams and turbo options for S3 TFSi?

[nightSpirit]

I'm running one of these engines in my Lotus Exige (fitted before my ownership). Initially it was running as stock but due to what I'm assuming was poor mapping, one of the pistons let go and so the engine was rebuilt.

Today I was looking through some of the paperwork that came with the car and spotted the rebuild options, quote and spec. Of the 3 possible routes proposed to the previous owner, the third route was the one chosen which consisted of (and I quote as I'm not that up on Audi/VAG tuning):

High Comp 11.0:1 WTCC custom forged pistons
Custom WTCC i-Beam conrods and ARP bolts
Race spec big end bearing set
Hybrid K04 turbo
RS4 high volume injectors
etc etc

The note from the tuner (no longer in business) stated that this setup is that of the BTCC/WTCC cars and with the appropriate cams/turbo would break 500hp/600nm without much stress.

Now I'm not going to go out and buy these things tomorrow as its current state of tune (400hp/450NM at 1.7bar of boost in a car weighing 960kg) isn't exactly lacking but I thought it worth asking as to what parts would be required as the quote simply states 'WTCC cams' and 'WTCC turbo'.

Anyone got any ideas?

[ManOpener]

I'm not sure what spec "BTCC" cams are, but a set of Schrick 246° intake and 252° exhaust, and something like a GTX3071R or similar on a decent manifold you should be north of 500bhp. You might need bigger injectors too but that's the kind of thing you'd need to check with a specialist.

[stef1808]

excuse me but is my man maths right at a 960kg car with 500bhp = 521 bhp per metric ton = buggati veyron type power ?

according to this http://www.autosnout.com/Cars-Bhp-Per-Ton-List.php

????

Edited by stef1808 on Tuesday 16th September 16:29

[stef1808]

Sorry to hijack the thread but ….

and at the same time you’ve got an agile car with liveable costs on consumables ???

what am I missing here ?

[nightSpirit]

Meh, my Radical was 252hp and 460kg Not exactly a daily driver though!

[stef1808]

= 548 bhp / ton on the radical

wow I didnt realise these cars where capable of such performance.

an elise with a s3 engine in seems like the bargain performance car of the century

[nightSpirit]

I will let you know in a year Already spent 1600 on an oil leak 3 months in!

Thanks for reply on turbo/cams btw. If I use the hybrid k04 for now would the cams still help? Any negatives to them?

[SuperchargedVR6]

What was S3 donor car? 8V? 8P?

Spinning even a hybrid KO4 to 1.7 bar is not a good idea for long term reliability. I can see why this tuner went out of business. Any mention of an uprated mechanical pump in the spec sheet?

Cams - good ones will help with cylinder fill in the midrange and carry it through to the top. Cr@p cams will just make the engine peaky.

For the turbo, have a look at Loba's range - http://www.loba-motorsport.com/shop/vw/golf/

[nightSpirit]

Evening,

Engine is 8p? 2.0 tfsi. Not sure on spec of turbo all I can see is the aem wastegate on the side...tiny looking turbo though.

I'll check them out, blew the oil cooler at Abingdon on Friday so that's next on thd list.

[neiljohnson]

When tuned the highpressure fuel pump & follower are put under huge strain this is the first thing you need to look at