tower of power dyno numbers

[PIP]

was curious what the actual propshaft dyno numbers were on the old early 1970s 115 inlines, and the 135s, and then the later 150, and finally 140? also, what about the last 115 inlines? i know the power port piston was only on the 135, 150, 140, and then final 115, but i am curious if it really made a lot of difference.

i talked to charlie strang a while back and he said he didn't think it made that much difference. i know he wasn't at merc for the later inlnie 6 stuff, but he knows his stuff.

[baldad45]

No power port on 135 and the 72 140 , the 72 140 was the same as 150 except it didn't have power ports , So 10 HP. at the powerhead is the answer you're looking for.