rocklord":1e8g5uj1 said:
280HP from 170 cubes with a 4 main crank!
Sure. The four bolt main crank is about 6 pounds heavier than the 200 crank, shorter stroke and longer rod than the 200, and even the little 144 could survive 8600 rpm in hydrofoil racers. As for 280 hp, well the ArgentineTC3000 racers were doing upwards of 380 hp with just a Weber 2-bbl , so it all lookes perfectly reliable and reasonable.
pikesan":1e8g5uj1 said:
love this discussion... anyone messing with one of these now?
Yeah, still a good perecentage of us here! Ever since the Clifford forum stopped in the early n0ughties, people started looking at the log
intake being the pinch point. Even with six 1.3" ports on the early 170 head, there is enough port area to make well over 300 hp. The" grind off the log lobby " has to realise the log it is the best intake coat hanger around, and now were looking at how to 'leave the log' and still make power.
tri-power 250":1e8g5uj1 said:
How did the twin carburetor setup work?
Ken
It has triple DCOE 45 mm Weber carbs and six long centre branch 1.5" tube intakes. It has
much longer runners than is ideal (6" max), but that would help low end torque without hurting power. Total intake runner based on the 16 inch length required to pacakage six intake tracts is 2800 cc's, plus the normal 800 cc from the stock 170 cylinder head, same as I have on my car. The total intake volume is therefore 3600 cc's, or 128% of the total engine capacity, much longer and larger than ideal, but clearly adequate to make huge power.
Paul Knotts method is basically Ak Millars Horsing around with the Mustang Six method, but fully port on port with flex pipe and well mounted stainless pipe and triple DCOE's rather than SS or Keihins or SU's. And that's where the power comes from.