a few questions on my engine

I'm after some advice and have some questions.
The spec of my engine now is
86mm cp pistons
Acl big and main studs
Genuine new chain and headgasget
Stage 1 turbo
Updated fuel pump
Profec b 2 boost controller
Compression of 125psi

The engine is being removed soon and I'm replacing
New piston rings
New oil pump and water pump
Crank ground down to .25 if needed after goin to the engineers to get checked

I'm going to upgrade the headgasget to what I'm unsure?

Could the low compression be to standard headgasget? As I have no oil/ water loss or smoke

Iv got a excedy organic complete clutch to fit but power are these ok for?

What could I do tiger best use of power from my engine?
Bigger turbo
Cams
3inch exhaust
Ecu change
Injectors?

I have no idea what power it's running now but was set to 1.1-1.1 bar
I'd like around 350 but 400 would be nice but haven't got the funds for a quife box

Is the compression 125psi across all cylinders ???? Has the head been skimmed or any work on the block ... any of these would alter your comp readings ...and determine what size headgssket you use .... as for the box its not uncommon to get the power figures you want to achieve on a standard box ... although its a bit of a lottery with them being of the age they are ....

It's across the cylinders within 10psi no work/skimming done to the block or head and just a standard Nissan gasget

What power can the excedy clutch take?

Do you know what exedy clutch it is ????

Organic one I can send a pic to you bud

Helix organic is around the 400 ish mark isn't it so they say? But mine let go at 400, but was quiet happy at 365bhp....

Brilliant thats the numbers Id like cheers Pete
I sent a pic of the clutch to Leighton he's said it's a stage 1 excedy organic clutch

Yes mate its a stage 1 organic exedy clutch kit according to the part number on the box ....

Glad to help! My standard gearbox was fine as well until I went over 400bhp...then it wasn't fine

As long as it's genuine one a lot of fakes about

It's a genuine one from a reputable shop

I would do your compression test again. With a warm engine and the throttle 100% open. Then do a wet test.

If still out do a leak down test.

It was deffinitly warm and tb open, I didn't do a leak down or wet test but with no fluid loss or smoke didn't suspect too many issues but a compression ratio issue