wedge Posted September 20, 2006 Report Share Posted September 20, 2006 ok, so i am about to buy a 4mil crank, i want to know what i HAVE to buy to make it work? how much power incress will i see with ported cylinders? and any tips or info would be great! Quote Link to comment Share on other sites More sharing options...
odaen Posted September 20, 2006 Report Share Posted September 20, 2006 If you get a 4mm 110mm rod crank, all you HAVE to buy is a 2mm spacer plate and some top end gaskets. The 4mm 115mm rod crank, all you HAVE to buy is the spacer plate and some 795 pistons. But you'd see better gains out of just porting your cylinders and sticking with your stock stroke crank probably. However, if you buy the 4mm 115mm rod crank, and get your cylinders ported for the longer stroke, you will not believe the difference in HP between a piped banshee and your new one. It is night and day with more power everywhere. My dune port 4mm motor put out over 76HP on pump gas and stock carbs with CPI's. I sold the cylinders to a kid on here, and he's just as happy with them as I was. Click the link in my sig, and give Cameron a call. He's the best guy I've ever dealt with. Quote Link to comment Share on other sites More sharing options...
Animalman294 Posted September 20, 2006 Report Share Posted September 20, 2006 The crank is going to be the most expensive part of the new build................ :beer: Quote Link to comment Share on other sites More sharing options...
wedge Posted September 21, 2006 Author Report Share Posted September 21, 2006 If you get a 4mm 110mm rod crank, all you HAVE to buy is a 2mm spacer plate and some top end gaskets. The 4mm 115mm rod crank, all you HAVE to buy is the spacer plate and some 795 pistons. But you'd see better gains out of just porting your cylinders and sticking with your stock stroke crank probably. However, if you buy the 4mm 115mm rod crank, and get your cylinders ported for the longer stroke, you will not believe the difference in HP between a piped banshee and your new one. It is night and day with more power everywhere. My dune port 4mm motor put out over 76HP on pump gas and stock carbs with CPI's. I sold the cylinders to a kid on here, and he's just as happy with them as I was. Click the link in my sig, and give Cameron a call. He's the best guy I've ever dealt with. thank you for your answer, i am going to buy the 4mm 110mm crank, but i have a couple questions about the spacer plate? what does it do, and what will happen if i try running it without one? Quote Link to comment Share on other sites More sharing options...
sheefreak Posted September 21, 2006 Report Share Posted September 21, 2006 If you don't run a spacer plate your pistons smash into the domes and everything go boom! You can run a spacer plate, but I prefer to run domes cut for the stroke difference. Whoever you pick for porting can do this for you. Are you going to run a Noss head or something similar? Quote Link to comment Share on other sites More sharing options...
wedge Posted September 21, 2006 Author Report Share Posted September 21, 2006 i am going to run a stock head that has been shaved. Instead of a spacer plate, am i able to put a couple extra head and base gaskets on? Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted September 21, 2006 Report Share Posted September 21, 2006 i am going to run a stock head that has been shaved. Instead of a spacer plate, am i able to put a couple extra head and base gaskets on? If you don't want to run the stroker plate, you will have to get the head cut. You may be able to get thicker base gaskets, but I'm not sure on those. 2mm is quite a bit of a difference in stroke, to try to make up with gaskets. Just my .02. PM Jeff at FAST, he goes by Fastoys on here. Quote Link to comment Share on other sites More sharing options...
r1 banshee Posted September 21, 2006 Report Share Posted September 21, 2006 But you'd see better gains out of just porting your cylinders and sticking with your stock stroke crank probably. Would agree 100% . I seen 74~76hp out of 350's with stock carb Quote Link to comment Share on other sites More sharing options...
Animalman294 Posted September 21, 2006 Report Share Posted September 21, 2006 I wouldn't trust the base or head gasket thing to take up the extra space for the 2mm. Too much can go wrong, so do yourself a favor and don't go sheap and do it the right way. Contact Jeff and he will hook you up right................. :beer: Quote Link to comment Share on other sites More sharing options...
badassbanshee479 Posted September 21, 2006 Report Share Posted September 21, 2006 if you are gonna run a 4mill crank, you should run the 115 rod cause it puts less side load on the piston with the corrected rod angle. also do it right and have a set of domes cut for the added stroke. stacking gaskets and or spacer plates are just one more place for air leaks!! there are some builders out there that can cut your stock head for the stroker also. Quote Link to comment Share on other sites More sharing options...
wedge Posted September 21, 2006 Author Report Share Posted September 21, 2006 ok, so my buddy is selling almost a hole motor, it is missing a couple things such as a couple gears for the tranny and a clutch as well, but i got all the good parts it needs, he says it has jetski pistons and they worked without a spacerplate, so i am not sure, i will ask a couple more questions to try and figur it out Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.