250r (long rod-vs-short rod)
#11
250r (long rod-vs-short rod)
You can do a long rod and 86 piston setup - this is what you could consider a LONG ROD or Stroked setup.
Any stock crankshaft has the same stroke!!! Installing a long-rod with an 86 piston DOES NOT increase stroke!!
To have a "stroked" motor you need a stroker crankshaft. The crank has to move the rod up/down further than stock to be a stroker.
Look, you can install a 86 piston on an 87-89 crank, install a spacer plate at the bottom of the jug and run it.
A shop here that rebuilds cranks will install either style rod on your crank for you. You just need to tell them what you want.
Another arguement to throw in here, many people believe the 86 revs faster than the other years. Hmmmm. Who knows?
#12
#13
250r (long rod-vs-short rod)
but i would like to know why it wears the cylinder walls more compared to a long rod like previously stated.
#14
250r (long rod-vs-short rod)
i know that. These Japanese motor run very nice R/S ratios like the famouns B16a. The short rod 250r also has a near perfect R/S ratio, better than that of the long rod. the question is, i want to know why the short rod creates more wear than the long rod like previously stated from member dan250race. this would not make sense in the sense that the better R/S (short rod = 1.74 and 1.75 being ideal for minimal sidewall loading) would cause more cylinder wall wear. im not saying its not true, just asking for why this would be.
#15
250r (long rod-vs-short rod)
Think about it. Picture a short rod and long rod motor next to each other running, and the rods going up and down. Now sence the top of the short rod is 5mm lower when its all the way down then the long rod its going to have more of an angle to it. The short rod is therefor "thrashing" against the cylinder walls harder than the longer rod. (because of the angles) Make sence?
#17
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IMLN
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09-28-2015 03:32 PM
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