bentvalve Posted March 8, 2007 Report Posted March 8, 2007 porting cases why? and does anyone have any pics? is this even anything i should consider for a 4mm stroker? don Quote
itsaripper Posted March 8, 2007 Report Posted March 8, 2007 Well of all the things you need to do to hop up a banshee motor, porting the cases will prolly be the last thing done. It will make you a couple of hp, in conjunction with the other porting done. If you have the cases apart putting in a crank, yea, do it. Sorry I don't have any pictures. Quote
2003LimitedBanshee Posted March 8, 2007 Report Posted March 8, 2007 This has been covered several times here and the consensus always seems to come back about like this... If you are building an all out drag bike, where max HP is key and longevity is not a big concern, go for it. Otherwise, general opinion is that the added potential for problems outweighs the slight HP advantages. Quote
Banshee0028 Posted March 8, 2007 Report Posted March 8, 2007 This has been covered several times here and the consensus always seems to come back about like this... If you are building an all out drag bike, where max HP is key and longevity is not a big concern, go for it. Otherwise, general opinion is that the added potential for problems outweighs the slight HP advantages. I was thinking about getting my cases port matched as well, and would be interested hearing any disadvantages...I have read many posts on this, but have not heard too many negatives, other than the small increase in power 1-3hp? Quote
FireHead Posted March 8, 2007 Report Posted March 8, 2007 BigRed350X posted a thread awhile ago that had several pictures and an explanation of case porting. Maybe you could search and find it. :thumbsup: Quote
majicmike Posted March 8, 2007 Report Posted March 8, 2007 This has been covered several times here and the consensus always seems to come back about like this... If you are building an all out drag bike, where max HP is key and longevity is not a big concern, go for it. Otherwise, general opinion is that the added potential for problems outweighs the slight HP advantages. How does this affect longevity ? I have never seen engine failure do to case porting. If you are porting the cylinders port the case as well it free power. Quote
FireHead Posted March 8, 2007 Report Posted March 8, 2007 How does this affect longevity ? I have never seen engine failure do to case porting. If you are porting the cylinders port the case as well it free power. The only way i could ever see longevity being effected is if you hack away at the cases to the point of compromising their structural integrity. Quote
White06Shee Posted March 8, 2007 Report Posted March 8, 2007 I Had My Cases Ported, ANd ALl They Do Is Port Match The Cases To The Gasket, They Didnt Take Off A WHole Lot But Its H.P. If You Already Diging Into The Motor You Should Just Get Your Cases Ported Yeah Its Only 2 Or 3 Hp But Its Still 2 Or 3 Hp You Didnt Have Before :beer: Quote
dajogejr Posted March 9, 2007 Report Posted March 9, 2007 I Had My Cases Ported, ANd ALl They Do Is Port Match The Cases To The Gasket, They Didnt Take Off A WHole Lot But Its H.P. If You Already Diging Into The Motor You Should Just Get Your Cases Ported Yeah Its Only 2 Or 3 Hp But Its Still 2 Or 3 Hp You Didnt Have Before :beer: Agreed 100%. Free HP, if only a few....and I already had it stripped down 100% for my 4 mil anyways. A big bore gasket, sharpie marker and a dremel....20 minutes and you're done. Just make sure it's smooth, but NOT polished. Quote
BigRed350x Posted March 9, 2007 Report Posted March 9, 2007 The only real disadvantage I can really see is if you remove too much in certain areas you would be decreasing the surface area the gasket has to seal against and you would be increasing the risk of a blown base gasket, but that's pretty rare if you do things right. - Jared Quote
2003LimitedBanshee Posted March 9, 2007 Report Posted March 9, 2007 The only real disadvantage I can really see is if you remove too much in certain areas you would be decreasing the surface area the gasket has to seal against and you would be increasing the risk of a blown base gasket, but that's pretty rare if you do things right. - Jared That's more what I was getting at... If you look at the base of a set of cylinders you will see the sealing area is fairly small and by decreasing the sealing area on the case as well, it just makes it slightly more likely. I probably should have clarified that I intend to port my cases and take my chances. As with most around I am a HP FREAK so whatever I can do to put more ahead of the next guy is worth it. It just seemed like the last few times I saw it come up, general opinion was to leave them be. :beer: Quote
FireHead Posted March 9, 2007 Report Posted March 9, 2007 The only real disadvantage I can really see is if you remove too much in certain areas you would be decreasing the surface area the gasket has to seal against and you would be increasing the risk of a blown base gasket, but that's pretty rare if you do things right. - Jared You could always o-ring the bottom of the cylinders to deal with the decreased gasket area. Obviously, that is beyond the normal guy with a die grinder in his hand, but it does work. :geek: Quote
majicmike Posted March 9, 2007 Report Posted March 9, 2007 ahhhhhhhh..... If you take to much out just weld it up bore them out for a 78mm bore and put the DM on there. LOL J/K just be careful and youll have no worries Quote
dajogejr Posted March 9, 2007 Report Posted March 9, 2007 You could always o-ring the bottom of the cylinders to deal with the decreased gasket area. Obviously, that is beyond the normal guy with a die grinder in his hand, but it does work. :geek: I'd think Oringing the bottom of the jug would make setting squish just a bit tougher, though.... Quote
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