Phoenix from the flames - Porsche Boxster with an Audi 2.7T

Phoenix from the flames - Porsche Boxster with an Audi 2.7T

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Escy

Original Poster:

3,975 posts

152 months

Sunday 7th July
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I've decided to go for one from a first generation Mercedes A-Class, it's a good shape, tall and thin. The plan is to put it behind the front wing where the charcoal cannister lives.

Am I right in thinking you fitted electric hydraulic power steering on your 996? I was looking for some fittings for the steering rack like these https://www.swengineering-uk.com/product-page/powe...

SW have none in stock and are saying 2 months for more. There's a few options in the US but I'm looking at £200 once duty and postage are added. If I can't find any in the UK I'm planning on using compression fittings. Just thought I'd check if you know where I can get some? I was going to email you but it says you don't accept them.

Escy

Original Poster:

3,975 posts

152 months

Tuesday
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I've got some changes coming up. I don't know if the day at Santa Pod lit a fire or if it's just that I can't leave things alone but I'm going for more power.

I've been left a bit disappointed with the RS4 inlet manifold swap, it did flow a bit better, the car was slightly faster when I timed it but basically it highlighted the fact I'm out of turbos so I'm upgrading.

I saw a dyno print out from an S4 running G25-550 turbos, that was making decent boost at around 4500rpm and with my actuator issues at Santa Pod that's where my boost threshold was higher than that and I had a blast on the way home. I can live with that. That S4 I saw made 774bhp at the wheels which is about 900bhp at the flywheel!

So I've decided to get pair of those turbos. I'm not expecting that sort of power, I don't really have a number in mind. The plan is to have the turbos where they are efficient rather than kicking the arse out of them like I'm doing at the moment.

If I tuned it to get the maximum out of it I'm fairly sure I'd break stuff. The issue is the torque (the S4 I mentioned made 675ft/lb at the wheels). Currently my torque level is around 550ft/lb, the gearbox and axles have coped fine so my plan is to leave the torque around there. I'll tune it with a combination of raising the boost pressure a bit slower and I'll pull ignition timing. I'll need to get it back on a dyno to tune this properly rather than on the street like I've been doing as I'll have no idea where the torque curve is.

Whilst I'm waiting for them to arrive I'm making some changes to the engine. I've bought some thicker head gaskets which will drop the compression from 9.3:1 to 8.6:1 as I'm still running the standard pistons. I've also bought some upgraded valve springs and titanium retainers. This is something I wish I'd done ages ago, mainly because I needed to rev it to 7400rpm to hit 200kmh (for performance timing) and I was pushing my luck a bit. I should be ok up to 8000rpm now. By increasing the revs I'll keep the same power band as I had before, it's just moved up a bit.

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I've made a start on the work. The plan is to get the heads off without removing the engine. I'll do one at a time. I was wanting to fit 2.8 n/a cams inlet cams whilst it's all apart but there's nothing local about. I was looking for complete engines.

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Escy

Original Poster:

3,975 posts

152 months

Wednesday
quotequote all
I'm using a tiny lithium battery like yours but the space has been filled up with my tank for my water/meth injection.

Escy

Original Poster:

3,975 posts

152 months

Wednesday
quotequote all
This is where I bought the valve springs.

https://fcp-engineering.com/en/8t-20v-27t-30v/649-...

These are the specs I've seen on the cams

Intake cam:

Euro S4: intake valve opening@10°ATDC
lift 7.67mm
duration 190°

RS4: intake valve opening@12°ATDC
lift 8.45mm
duration 204°

2.8l ACK: intake valve opening@12°ATDC
lift 8.71mm
duration 210°

My 2.4 cams are the same part number as the RS4 cams. If you can get me some cams let me know.