Hey Benny, 

Some updated data came in regarding piston rings - the NA gap is much too tight. Especially once you factor in heat and expansion, given the cast alloy pistons and the iron sleeves, your gap will tighten which will create a sub-optimal environment for boost. I've been told that the ideal gap for a stock motor seeing boost is around the upper limit of the stock spec, if not slightly more... remembering that this motor is 10.7:1 CR whereas our EJ turbo friends are somewhere around 8.2, we're dealing with an engine that's compressing already compressed air 2 times more than the smaller engines are... however, these engines still don't seem to suffer the ringland failures, insofar as the conrod becoming 2-or-more piece and adding a viewing window to the crankcase. 

https://www.cp-carri...19final-web.pdf

Some useful info in there as well. Also, if you're going to boost a stock block EZ, I would say E85 as a minimum unless you really really trust your tuner. 

Unfortunately, cams still seem to be thin on the ground. Aaron Gipp has been making them but no updates on those as yet. I've sent an inquiry to Starcev Motorsports in Russia but that comes with it's own complications as is, because importing from RU is problematic at the moment. 

Beyond that, any other questions, sing out and I'll try to answer it. 

G'day gents, 

Good to see the ol' four-rums has returned. Not had a lot of time to tinker around, unfortunately I'm still pending a shed at the new joint. Dug the foundations though, so we're not terribly far off! Benny - I will be due to collect my junk soon hopefully, sorry for the hold-up! 

I've started the process with RSS to get the case halves done... that will be the first big hurdle. I think I might get a local machine shop to do a hone with the pistons before I send them off for drilling and close decking just in case, don't want to be out of pocket for freight and time if the bores are too oversized! 

For the meantime, must update some of my old data. 

Hey boys, 

Unrelated to the timing chain, a con rod decided to go boom. I can attribute that to me being a spastic, I was driving the car on a tune I was doing as I went, and gave it a bootfull. I think the bottom end on that motor wasn't all that healthy anyway. 

I've got the last of the parts needed for the built motor. So, I think I should get that done. Unfortunately, I've been flip-flopping between what I should do, which hasn't been great. Stock motor NA, throw another stock motor at it, or just build the freaking thing already. 

I think we'll just build it. Benny has a spare motor for parts for me in Ararat so I think a drive up is due soon...

Wicked work! Been keen to get back on and do some updates. 

Thanks mate.

Edit: Quickly did an update as I realized that the STi rotor I referenced was the 5x114.3 one and not 5x100. Just to clear up any confusion.

Hey all,

Another update! Finally got the rotors for the brake upgrade, and boy, these fuckers are huge. 360mm in diameter is unreal for our little cars.

The Cayenne calipers fit the rotor perfectly and the pad annulus is perfect, really happy about this choice.

Fellas, 

Good news! The Dacia Sandero brake rotors have arrived, and they are ENORMOUS. Also, quite heavy, coming in at 15kg a rotor! These are the OEM option for the big old AMG lumps so... no doubt they won't get very hot in my little Lib. They're also high carbon rotors, meaning they won't warp, ever, and they're safe to be drilled (which they are from Brembo).  

This little project so far, is proving friendly to the wallet, having spent approximately $450 for the calipers, and $340 for the pair of rotors. New pads from TRW will cost about $135 for a front set. The machining time and the engineering time is where the majority of expense would be for the general public, which I'll be removing. On that, I may consider offering a predone rotor and hub centric ring package for anyone looking to do this upgrade. If the brackets are easy enough, I'll do a complete package. Let me know. 

The project moves forward! 

Haha thank you Benny! I've noticed a huge discrepency in cheap BBK's that the Euros have but we don't. Which is odd. 

That's my thoughts as well, I've had a couple messages from people interested in buying assmebled kits when all is said and done. Once the rotor arrives, I'll 3D print some "brackets" to see how close everything gets. 

Keep the Brembos, awesome looking shelf piece, LOL! 

Howdy, me again.

Much like my old post, this is all about adapting other manufacturer brakes onto our cars. Except, this time I come equipped with wheels that will clear them, and more knowledge than my previous post had.

Short and hairy, I've bought a set of Porsche 958 Cayenne (10-17) brakes. From a fleabay wrecker, they came to a grand total of $450AUD. Considering that any other *brand name* 6 piston that isn't OE would go for nearly 10 times that, I think it's a good deal. Plus, I'm a masochist and enjoy figuring shit out that other people just pay for.

But Tim, why?

Well, I'll tell you.

• They're made by Brembo
• They're made for Porsche
• They're a monobloc caliper
• They're 6 piston
• They support upto a 360mm rotor and 36mm thick
• They are a radial mount (they don't have mounting ears - you use a manufactured mount)
• They look AWESOME

If you still have questions, you have no business in this thread and are required to leave, lest I flamethrow you for asking silly questions. Here's some pictures.

Now, onto the adapting. Seeing as I can't find anyone else who has tried to fit these (and documented it), I'm going to do the nitty gritty.

First issue with these, is, how to physically mount them. I specifically hunted for radial mounted calipers for the simple fact, that they are a lot easier to mount than trying to make an adapter for ear-style mounts.

Thankfully, ze Germans make life easy as hell. https://epytec.de/uk...onfigurator-br1

I suspect that they will be cheaper than having someone local manufacture one-offs. And, given they make the brackets to TUV standards, I'll be safe.

The next issue. The big one. Rotors.

Oh, god, ROTORS.

The big issue here, is that a 360mm rotor is bigger than Subaru ever intended to put under a Subaru. And finding a 360x36mm rotor that comes with a 5x100 PCD, as I've found, is damn near impossible. So, whether I like it or not, a hub centric ring and redrilling of the rotors is going to be a necessity. Honestly, all things considered, that's not all that bad.

We need to be doing a collective thank you to Mercedes for these, though. Cheap, and easy to get.

So that's the Merc rotor, Brembo P/N: 09.B747.51.

Compared to our STi Brembo rotor...

This is the 5x114.3 post-2004 STi rotor

This is the 5x100 pre-2004 STi (also BES/BL/BP STi) rotor

Which, is actually quite similar.

The differences we need to note are as follows. (First line is Subaru, second is MB)

• 326 vs 360mm diameter
• 30 vs 36mm thickness
• 58mm vs 67mm hub bore centre
• 52.7mm vs 51.5mm rotor height (and therefore, offset)
• 148mm vs 154.3mm hub centre hole (where the wheel hub is accepted into the brake rotor)
• 100mm vs 112mm PCD (114.3 for post 04 STi)

As per the attached schematics and measurements I just mentioned, the differences are actually quite minuscule. Let's discuss.

The sizing is a given, but we know that we only require a 9mm thick hub centric spacer, just to keep the rotor centered on the hub, the rotor height is 1.2mm shorter but, we all know just how thick the STi Brembo calipers are. From my measurements, the Brembo BCZ calipers do seem to actually be more shallow. I'll measure that by comparison when I get a chance.

The PCD is really a non-issue, it's actually solved by one of the many PCD redrill kits you can buy online, and a bit of patience, or paying a half-way competent machinist to drill some holes. Simples.

The hub centre bore or "hole" is perfect. Nothing needs to be said about that.

So, the move from here is to acquire the various bits I've arranged from club members (I've found a wheel hub, some calipers and a ton of rotors) to do some mocking up and measure up that bracket. Mounting hardware goes without saying, Grd 12.7 all the way through.

Hope you all enjoyed the read and I'll be posting more info as I come up with it.