Thanks for the right up! Really interesting. I have got my new 3D printer going, finally. Has a 400mm build cube. It all sounds achievable with some time to throw at it.

What's your casting setup? How are you melting the aluminium, pouring it, etc.? I'd like to see some more pics and description of that if you don't mind sharing and have pics to share.

I haven't actually fitted any or even built an intake manifold I'm happy with yet. Hence I don't really have useful input. I have collected a few different turbos to use though. I have a T25, T28, T3 (from a SAAB), I've also toyed with using a GT18v off a diesel sprinter van. The EGTs might be low enough with e85? Lots of work to find out!

Then there's the M90 blower in a box in the shed I thought about fitting. I do like the idea of twin charging but packaging is an issue. Twin charging is probably overkill when you've already got the big block A series but allows a bigger turbo and a wider torque band.

Right now I'm trying to stay focused on getting a gearbox ready.

That is the clutch cover I have bought. I can reverse engineer it, I was just looking for a short cut. Short cuts are great, something to compare your work to.

Dattoman, did you use the sr20de pulsar clutch? Happen to know pcd on the location dowels or have a drawing for the pattern?

I'm doing a cut and shut, the auto bell is too long. It'll be a bit of the 21r bellhousing, a bit off the front of the a series box and a plate in between since they won't line up. I'll write it up once I've confirmed it works.

After a trip to my favourite parts shop I can confirm the Toyota clutch cover is too big. The sr20de 95 pulsar clutch cover will fit. They measured the thickness of the pulsar and rn40 hilux discs for me as well. The hilux disc is about 1.8mm thicker so it'll be a flat flywheel with shims or a spacer. See how it works out.

Thanks for the replies. Did you have a step machined into the flywheel to suit the pulsar clutch cover? One catalog says it's a +0.25mm step. Of course that may be different if the clutch thickness is different. The picture in the tech wiki doesn't seem to have a step for the SR20 clutch setup.

I think the best option would be to use a kit for one car and adapt the flywheel. RN40 Hilux or YN55 Hilux both seem like possible options but they have +0.5mm steps which isn't the end of the world if I'm getting it refaced anyway.

G'day, I've started down the path of adapting a W5x gearbox to an A series to put in my coupe. I know a couple of other members have done this. I'm having trouble finding data on clutch cover (I'd call it a pressure plate) dimensions. The gearbox is off a 21r engine and if I can fit a clutch kit for a 21r that would be great. I just can't find how big the clutch cover OD is anywhere. I measure the flywheel at a bit over 270mm.

The Exedy number is TYC538 and it's fitted to heaps of different cars. One of them's a Pintara R31 with the CA20E engine. The clutch disc is 225mm.

What pistons are you using? They look like flat tops. Tell me more...