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differences between 80 MM crankshaft and 100 MM crankshafts

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deafinite

10+ Year Contributor
71
1
Aug 3, 2012
newmarket, ON_Canada
hey everybody,

i did use the search button but no luck,

i am just looking around to learn more stuff and i was on this site and i was looking through crankshafts, and some title that said 80 mm manley forged crank shafts and others were 100 mm manley forged crank shafts. and the price were different but the description of it is the exact same.

so im curious here.

what's the difference between those two? and why would anybody buy 80 instead of 100 or 100 instead of 80? like i don't get it, if they both work the same way, so why different mm ? any help would be appreciate,

just learning here. thanks!
 
They are for stoker motors. 100mm is used a lot for 2.3 and 2.4. Ive never heard or seen 80mm but that would be a destroker. It comes down to what liter of engine you want and what your goals are.
 
They are for stoker motors. 100mm is used a lot for 2.3 and 2.4. Ive never heard or seen 80mm but that would be a destroker. It comes down to what liter of engine you want and what your goals are.

what do you mean by stoker motors?

okay so lets just say, i have a 2.0 L 4g63 T engine. what can 80 or 100 MM do for that engine ?
 
Remember the side load increases as well as the piston speed in a 2.3 stroker. Plus they pack a wallop, torque wise and have been known to beat up on trannys a bit quicker than a 2L.
I talked with a guy from JAM for about 20 minutes weighing pros and cons and decided, personally, that i would like the 2.0 better. Now a 2.1 ahhhh thats best of both worlds but cost is high for that setup.

Someone put up a post of all the possible displacements and how they are achieved in to a nice little row of columns. Should be in the tech section. Using 4g64 with x crank, x rods and x pistons for this or using the 4g63 block with x crank, pistons, rods will yield that. There are quite a few combinations when including long rod setups and the more rare combos.
 
Remember the side load increases as well as the piston speed in a 2.3 stroker. Plus they pack a wallop, torque wise and have been known to beat up on trannys a bit quicker than a 2L.
I talked with a guy from JAM for about 20 minutes weighing pros and cons and decided, personally, that i would like the 2.0 better. Now a 2.1 ahhhh thats best of both worlds but cost is high for that setup.

Someone put up a post of all the possible displacements and how they are achieved in to a nice little row of columns. Should be in the tech section. Using 4g64 with x crank, x rods and x pistons for this or using the 4g63 block with x crank, pistons, rods will yield that. There are quite a few combinations when including long rod setups and the more rare combos.

so why would anybody want to destroke/stroke their engine ? for what reason?
 
yes that is what I previously posted

Completely missed your first post. Thats it. My bad.[DOUBLEPOST=1411219155][/DOUBLEPOST]
so why would anybody want to destroke/stroke their engine ? for what reason?
More power/tq in lower revs for a stroker. Thats a huge bonus. The 2.1 destroker can see crazy high rpms so there are benefits in that.
 
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