Ok so here is my mods list.
- Car is 1987 740 Turbo wagon with almost exactly 300 000 km
- upgraded to 13mm rods
- new rod bearings
- new piston rings
- cylinder ridges reamed
- cylinders re-honed using ball hone
- new head gasket
- head resurfaced
- carbon deposits in head cleaned out
- valves re seated
- replaced valve stem seals
- replaced valve hushers
- reshimed head (T cam)
- new front cam seal
- new valve cover seal
- upgraded injectors (brand new browntops)
- new intake manifold gasket
- upgraded intercooler (31x12x3)
- cone filter intake with bottom of intake area cut out or bent down for more air flow
- ebay turbo exhaust header (flange flipped)
- Almost new Garrett T3/T4 60AR intake 63AR exhaust turbo (rebuilt)
- upgraded oil braided steel turbo oil feed line
- new exhaust manifold gasket
- replaced exhaust manifold studs
- t3 to t3 wastegate adapter plate
- Turbonetics external wastegate
- wastegate dump to atmosphere out hood
- 2.5 inch exhaust out hood off turbo
- Greddy E-01 electronic boost controller
- prosport evo wideband
- autometer C2 boost gauge (only goes to 20 psi but EBC screen also had boost gauge)
- over boost switch bypassed
- amm and idle set for new injectors
- new spark plugs (NGK 7es)
- throttle body cleaned with new gasket
- flame trap/ PCV box cleaned
- Greddy catch can
- new oil pan gasket
- synthetic oil (Mobil one)
- 94 octane (with ethanol...) or shell 91
- new coolant
- new power steering fluid
- new coolant temp sensor
- ignition timing set to 14/15 degrees BTDC
The waste gate must be stuck open.
Don't think it's stuck open as I have a hood dump from external gate and can see it closed. Could be leaking though, I'm not sure.