5SGTE custom piston. Options

[rhodesyboy]

Hi all.

So basically I'm considering doing a 5sgte build however as I am based in the UK I'm struggling to find good pistons, there is a few in the USA however import tax, delivery etc makes that a little bit out of reach.

However I'm looking into custom pistons, currently I am in talks with omega (only early stages but still). However as with many custom inquiries they need a minimum of 20 pistons to be ordered, so basically I'll need at least 4 other people to come along and get some custom pistons with me. This will be great for other people in the UK/EU doing a custom 5sgte build as it will give us access to high quality pistons (omega are VERY high quality). Unfortunately I am not certain on a price however I would guess the more people come along the cheaper it will become.

There will be a discussion in terms of how we spec these pistons in terms of fitment compression ratios etc before an order is placed, both on this forum and a few others.

Cheers

This post has been edited by rhodesyboy: Aug 22, 2018 - 10:26 AM

[rhodesyboy]

I'll be doing majority of the building myself, but I will be sending it off for specialist machining. I do have a micrometer but it's a chinesium one that changes it's zero each time you measure something I do have a decent DTI gauge but not a dial bore gauge, but for the bore I will be sending the block off for straightening of the bore, honing etc anyway so I would imagine it would be unnecessary for me to have one myself? Yeah I've got torque wrenches and the likes.

I've certainly got enough to assemble an engine, however precise measurements is a bit more tricky.

The only thing I am concerned about with the build is the stuff that is different to building a 3sgte, because I'm well within budget to do that as I helped a mate building a 3sgte and remember how much he spent on parts. So I'm not going to worry about buying some forged rods as I'd do that for the 3sgte anyway so the price there makes very little difference between a 5sgte and a 3sgte. I already had an eye on 3sgte parts that would happily take the power I'm after (400-450 ish), I'm not just after turning up the boost without changing fuelling, ECU, internals. My only temptation for a 5sgte is that I'm just concerned with the strength of the rev 3 block.

Is true blueprinting necessary for a road engine? I was planning on getting everything balanced by a local engine machine shop and already discussed setting bearing clearances with the 3sgte, however I have not discussed the 5sgte yet. It was my understanding that 5sfe and 3sgte main bearings were identical (links below), it's just big ends that are different so surely that shouldn't be too painful to do?


https://www.mr2oc.com/61-3sgte-turbo/460111...e-bearings.html
http://www.celicatech.com/forums/archive/i...hp/t-43478.html