Rattlehead Posted February 17, 2005 Report Share Posted February 17, 2005 What is the difference between and stroker crank with stock length rods and a stroker crank with long rods. Wouldn't the whole long rod thing put it back to stock stroke? If I had a +4 stroker crank and put a set of long rods on it that were plus 4 , it would essentially be stock stroke again right?Can someone explain this to me? I feel like a real moron, but ya gotta ask to learn. Quote Link to comment Share on other sites More sharing options...
Rattlehead Posted February 17, 2005 Author Report Share Posted February 17, 2005 I guess no one else knows the difference either. Guess I'll have to cal Passion up and find out.. Quote Link to comment Share on other sites More sharing options...
banshee04le Posted February 17, 2005 Report Share Posted February 17, 2005 If I had a +4 stroker crank and put a set of long rods on it that were plus 4 , it would essentially be stock stroke again right? Wrong. I can't even comprehend how you came up with that. Long rods are used to correct excessive rod angle that occurs when stroke is added. Excessive rod angle causes side loading on the piston which results in premature wear of the bore and skirt. Quote Link to comment Share on other sites More sharing options...
racer Posted February 17, 2005 Report Share Posted February 17, 2005 word. there is a HUGE post on this somewhere in the forums, not sure which section though. try to find that, cause in it i explained the entire stroker crank/longrod crank theory. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted February 17, 2005 Report Share Posted February 17, 2005 4mm + 110 rods is stock length rods. with this setup you use the regular banshee pistons. 4mm + 115 rods are longer than stock. with this setup you use the 795 series pistons. almost everyone who gets a stroker crank gets the longrod and uses 795 series pistons. Quote Link to comment Share on other sites More sharing options...
banshee04le Posted February 18, 2005 Report Share Posted February 18, 2005 4mm + 110 rods is stock length rods. with this setup you use the regular banshee pistons. 4mm + 115 rods are longer than stock. with this setup you use the 795 series pistons. almost everyone who gets a stroker crank gets the longrod and uses 795 series pistons. 325179[/snapback] My 4mm is setup with 110mm rods and runs 573 blaster pistons which have a conciderably shorter deck hieght than the banshee pistons. Supposedly the shorter rod motor will rev a little quicker. IMO 4mm stroke is not enough to create a detrimental rod angle so differences in reliability would be marginal. Quote Link to comment Share on other sites More sharing options...
64xracer Posted March 1, 2005 Report Share Posted March 1, 2005 The rod length has nothing to do with the stroke. The crankshaft is where you get your stroke. Stroke is measured from BDC to TDC. Rod length is how long the rod is from center of the big end to center of small end. The way you tell what piston you need is by the compression height. Compression height is measured from center of wrist pin to top of piston. To figure it you need the deck height of the block, the rod length, and the stroke of the crank. Since I don't know all of those specs for a banshee I will use a small block chevy for an example.....Deck height is 9", rod length is 5.7", stroke is 3.48" you take the stroke and divide by 2 = 1.74 + rod length 5.7 = 7.44. Then you take your deck height 9, and subtract the 7.44, and you get 1.560" and that is the compression height of the piston that you need to get. Quote Link to comment Share on other sites More sharing options...
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