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> 96x71 or 96x78 motor - That's the question
KenH
post Jun 13 2006, 12:23 AM
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In playing with my el-cheapo dyno program it looks like you can get the same HP with either a 71mm or 78mm stroke. The 78mm however gives a bit more torque.

Over all the CAM seems to give the biggest improvement.

The question is - is it worth the hassle to go to 78mm stroke (T1 rods, special pistons, clearence issues, cost of rods, crank, pistons) for 10'lb of torque??

Looks like 96mm x 71mm with good heads, proper CAM, optimun fuel delivery, FI or Carb, will make a pretty good motor.

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Ken
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Posts in this topic
KenH   96x71 or 96x78 motor - That's the question   Jun 13 2006, 12:23 AM
So.Cal.914   Torque is nice but the shorter stroke is going to ...   Jun 13 2006, 12:36 AM
Twystd1   It really depends on your end result. What are yo...   Jun 13 2006, 01:22 AM
Mark Henry   I'm sorry but those desktop dyno programs are ...   Jun 13 2006, 06:16 AM
KenH   This is the set-up. 96mm pistons 44 webbers - 36m...   Jun 13 2006, 05:36 PM
anthony   Raby has graphs posted for all his engines at www....   Jun 13 2006, 06:08 PM
BMXerror   "There is a replacement for displacement. It...   Jun 13 2006, 06:23 PM
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