hjtrbo

There's a guy north of Adelaide that will get you heading in the right direction if you're up for a holiday 😉

A datalog and tune file would be handy. Where are you based?

Compression ratio?

2000cc is pretty big, not impossible to tune though if you can get them firing reliably at idle. 1500cc at 3 bar base pressure will do good. As for your power goal, what compression ratio? To high will be a dog on 98.

Clean the sump and block with brake clean then hit it with talcum powder. It should point you in the right direction.

I know it's a pain, the manifold also needs to be straight. A decent straight edge across it length ways. A strip of paper 10mm wide can be placed under the straight edge in various spots. It should be snug to impossible to pull the paper out. Other option before pulling off the manifold, get a piece of rubber hose and put it to your ear like a stethoscope. Use the other end to survey the manifold and turbo area in detail. The leak will be very obvious to the ear when you've honed in on it.

it's a long story.

There's a gasket in each half moon, front / rear of sump.

It sounds like a massive job but it's actually not, drop the k-frame if you intend to re-seal the sump. It'll make your life far less horrible trying to get the sealing surfaces spotless for the new sealer. And to mention cleaning the sump to remove the old sealer. You don't want that floating around and getting stuck to the oil pickup screen. You can buy an Aeroflow engine support bar for cheap to hold the engine up. AF98-2065 – Import Parts & Mechanical (ipmracing.com.au) BMW zf 6hp26 (Genuine) valve body seals plus adapter seal block and mechatronic plug - MJ Products | Solar Fans & Lights | Vehicle Accessories | Auto-Transmission Parts | Lucas Oil Distributor BMW ZF 6HP26 6Spd Auto Trans Steel Metal Sump/Pan Conversion Kit (METAL/RUBBER Gasket) - MJ Products | Solar Fans & Lights | Vehicle Accessories | Auto-Transmission Parts | Lucas Oil Distributor 99800K - SHIFT KIT (6HP19/26/32 & 6R60/6R80) | Transmissions (alltranz.com.au) 99801K - ZIP KIT ZF6HP19/26/32 GEN 1 EXC CODE 053 | Transmissions (alltranz.com.au) 99995 - SEPARATOR PLATE (052 CODE) OEM | Transmissions (alltranz.com.au)

Yes you can drop the fluid out of the TC and replace it. There are valve body to case seals and valve body dampers that should be replaced. Also replace the case connector seal. Use genuine parts. MJ Products in Hallam VIC has everything you need. Be aware that when you refill the trans when its back on the car that you'll need to check the level maybe 2 or 3 more times over the course of a few days.

Your mount doesn't look good. Pretty nasty split. Time for a new one. For the nut, pry back the little locking indent. Then grab a 12pt deep socket that fits the nut.

4 tc bolts. Mark it. Have a weak memory of the way they're orientated the tc can only ever go back to the same spot. When you have the tc bolts out use a pry bar to gently push the converter towards the transmission. It should move back about 5-10mm. That'll get the tc spigot out of the crankshaft bore.

Hey, so that fuel issue is still there?

G35-900 would be better again.