what have you done so far?

start with a larger exhaust, 3" will do fine, turbo back if possible, a few others have wrapped their down pipe to keep the heat in

search for a pic of the EGR and plug the line with a small bb- keeps your intake cleaner

new air filter, fuel filters (2), remove the little square on the top of the IP-fuel pump - 2 wrenches under it

psi and pyro -exhaust gas temp gauge, if you dont want to take the exhaust and intake manifold off drill into your down pipe -stop at 1000 degrees max

find a intercooler, anything is better then nothing,

adjust your ip timing to 28 deg

get SD 265 nozzles and pop tested or AAZ VW 2 stage injector bodies from 1.9 td canadian engine with the #265 nozzle

after all that remove the limiter from the IP, turn boost to 14-15 and enjoy the best free? hp?

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1985 300D - 599,xxxk - blue interior #265 Monark Nozzle, AL129X, 15" Ronals, Gen II Big Brakes hunting
1985 300D - 491,xxxk - in prog-{A-A IC, 3" exhaust, psi\pyro, 28*BTDC, Hella Euros, IP Limiter removal
1985 300TD - 783,xxxk - parts car,used new engine with ALDA cap inplace
1987 Kenworth T-600 8LL 425 CAT Mech. - 6,000,000+k - DEI exhaust wrap, punched through resonators, 1 recent rebuild,