wildbansheeboy Posted October 23, 2006 Report Share Posted October 23, 2006 (edited) What way to go Long Rod +5 OR 4MM STROKER. We are going to create another drag Quad and want to know whats better out of the two. I have a 4mm and would like to know whats differnt then a 5mm long rod .I was told the that a stroker puts out more TQ and a long rod revs higher(Top End:Drag ported cyl. and pvl stator no rev box.) what do u all know? :cool: Edited October 23, 2006 by wildbansheeboy Quote Link to comment Share on other sites More sharing options...
hittintrees srh Posted October 23, 2006 Report Share Posted October 23, 2006 dude, you dont gain power from a longer rod. the idea behind it is to improve the angle of the connecting rod then you add a longer stroke. putting less stress on the pivot bearings and wrist pin. Quote Link to comment Share on other sites More sharing options...
odaen Posted October 23, 2006 Report Share Posted October 23, 2006 What way to go Long Rod +5 OR 4MM STROKER. We are going to create another drag Quad and want to know whats better out of the two. I have a 4mm and would like to know whats differnt then a 5mm long rod .I was told the that a stroker puts out more TQ and a long rod revs higher(Top End:Drag ported cyl. and pvl stator no rev box.) what do u all know? :cool: A long rod crank does nothing to displacement or stroke. A 4mm crank adds 4mm to the stroke, giving almost a 10% increase in displacement, and a good increase in HP everywhere. A stock bore 4mm has like 373cc's of displacement vs 347 for stock. Quote Link to comment Share on other sites More sharing options...
wildbansheeboy Posted October 29, 2006 Author Report Share Posted October 29, 2006 So whats so good about the 5mm longrod? I hear it is so good from a couple of local drag racers high rpms is what they say. I don't know much about the long rod that is why I am asking . Do You get higher R's or what good is the 5mm long rod? :: Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted October 29, 2006 Report Share Posted October 29, 2006 The longrod is easier on parts, making for a more reliable engine. Quote Link to comment Share on other sites More sharing options...
JaysonP Posted November 29, 2006 Report Share Posted November 29, 2006 (edited) the potential of a long rod is very good. less rod angle towards the exaust side of the cylinders which means less heat and less drag, the inside parts spin eaiser, maybe a little less vibration and more cumbustion time hence the longer rod means the piston sits at TDC longer. so you get a more complete burn of your fuel, meaning more downard thrust on the powerstroke. and by stroker if im correct... a +4mm stroker only means 2mm up and 2mm down which means about 0.160thou more of crank revolution there are high possibilities of getting more RPM's out of a stroker motor VS say a stock stroke motor. it all depends on port area and port timing. there are both pro's and cons about the long rod vs the stroker. they also make a very mean combination when put together! Edited November 29, 2006 by JaysonP Quote Link to comment Share on other sites More sharing options...
sheefreak Posted November 29, 2006 Report Share Posted November 29, 2006 The shorter rod will actually allow the motor to rev out faster. I personally run the +4 stroker w/+5 rods. I agree the long rod won't do shit for power increase though. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted November 29, 2006 Report Share Posted November 29, 2006 . and by stroker if im correct... a +4mm stroker only means 2mm up and 2mm down which means about 0.160thou more of crank revolution there are high possibilities of getting more RPM's out of a stroker motor VS say a stock stroke motor. it all depends on port area and port timing. incorrect, the rod has been moved 4mm lower on the crank... making it 4mm higher on the rotation of the motor... thats why you need 795 series pistons AND your domes cut... 2mm makeup on the pistons and 2mm makeup on the domes... I agree the long rod won't do shit for power increase though. agree or not, its a fact ... Quote Link to comment Share on other sites More sharing options...
JaysonP Posted November 29, 2006 Report Share Posted November 29, 2006 (edited) incorrect, the rod has been moved 4mm lower on the crank... making it 4mm higher on the rotation of the motor... thats why you need 795 series pistons AND your domes cut... 2mm makeup on the pistons and 2mm makeup on the domes... ok i stand corrected i didnt know how it was classified, the engines i build RC type when theysay 2mm stroker its 1mm up and 1mm down... but thats now i know for thefuture but instead of cutting the domes and cutting the pistons(chnges port timing) any dont you justrun a base stack...i know port area will be increased and volume in the cases and transfers but its better thathaving more transfer time less transfer duration = more snappy results. but what do i know im a rookie member... Edited November 29, 2006 by JaysonP Quote Link to comment Share on other sites More sharing options...
highroller355 Posted December 4, 2006 Report Share Posted December 4, 2006 (edited) im in the process of building a 4mm stroker long rod with stock head just with a spacer Edited December 4, 2006 by highroller355 Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted December 5, 2006 Report Share Posted December 5, 2006 incorrect, the rod has been moved 4mm lower on the crank... making it 4mm higher on the rotation of the motor... thats why you need 795 series pistons AND your domes cut... 2mm makeup on the pistons and 2mm makeup on the domes... agree or not, its a fact ... I think you had better do some more checking on the +4mm stroker, because I was told it was 2 mm further out, which makes for a total of 4mm increase, from top to bottom. A +4mm increase, would make for a top to bottom increase of +8mm. The 795 series or blaster pistons, only make up for the increase in rod length, that's why the domes have to be cut, or a spacer plate used, to make up for the increase in stroke of the crank. If you don't believe me, just call Jeff @Fastracing, and he'll straighten things out. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted December 5, 2006 Report Share Posted December 5, 2006 I think you had better do some more checking on the +4mm stroker, because I was told it was 2 mm further out, which makes for a total of 4mm increase, from top to bottom. A +4mm increase, would make for a top to bottom increase of +8mm. The 795 series or blaster pistons, only make up for the increase in rod length, that's why the domes have to be cut, or a spacer plate used, to make up for the increase in stroke of the crank. If you don't believe me, just call Jeff @Fastracing, and he'll straighten things out. True... :beer: Quote Link to comment Share on other sites More sharing options...
sheefreak Posted December 5, 2006 Report Share Posted December 5, 2006 "agree or not, its a fact ..." Need to get your facts straight about strokers Bansh-eman! :ninja: Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted December 5, 2006 Report Share Posted December 5, 2006 "agree or not, its a fact ..." Need to get your facts straight about strokers Bansh-eman! :ninja: a spacer plate makes up for 4mm.... a 795 piston makes up 2mm and the domes cut make the other 2mm you might want to read around some... Quote Link to comment Share on other sites More sharing options...
lowriderb Posted December 5, 2006 Report Share Posted December 5, 2006 when they talk about strokers they are talking about the total stroke, and normally they are talking about the total stroke added, the 4mm stroke would be 2mm up+ 2mm down.. making the total stroke now 58mm instead of 54mm total stroke.. Quote Link to comment Share on other sites More sharing options...
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