Tobst:

0.8 hp per cubic inch on a 30+ year old engine is pretty spiff. To get more you are going to have to do engine modifications. Should be able to push at least 320 hp out of it, but it won't by by doing small twiddles.

You should first verify that your ignition and fuel systems are working properly and that the cams are in good shape -- 0-60 in 9.5 sec, top speed of 125+ mph is more that adequate for me, and if you don't get those results, the engine is still sick!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!