in one of the how to articles there is a decent how to and specs on porting the cyl. look around, you'll find it.bacanal32 said:Can any one give instructions on how to do case porting? I am looking info as where/what and how much to grind down. TIA
bacanal32 said:Hmmm, I am really looking for crank case porting, not cyl porting. Thanks anyway.
I opened up the ports by 2mm to match the barrel I ported and took off the 90 deg angle leading up to the barrel. Also made them 1mm deeper to match barrel.vinnie said:when u guys port, which bit do u use for the dremel tools?
I have had to split a case recently and was wondering about case porting. What people have done this and does this method above seem to work well? Does it reduce crankcase voulme to much? If so, could that be corrected by FCC?WFO Racing said:I opened up the ports by 2mm to match the barrel I ported and took off the 90 deg angle leading up to the barrel. Also made them 1mm deeper to match barrel.
I cut the corners off the bottom of the barrel to match the piston as well.
I used a carbide cutter bit and then a stone followed by 440 grit sand paper.
Think about the case area scenario for a minute and I know that you will for sure understand "stuffed cranks" and "stuffed cases". I will give you a hint but case volume has a direct affect on transfer port air velocity.d.king said:I just finished my first port job. Worked very well. Now i see this and think i might have to try it!! Makes sense, clean up the passage's for the air to flow would only make things better. Although i still dont understand what the case area getting bigger or smaller will do for performance.
Sounds logical to me. However, I'm by no means a certified mechanic. Thats why I'd like some knowledge on this area. Doesn't appear as tho many people have attempted.d.king said:I would think that, if the space was smaller, it would increase the speed of the air and aid in low speed power. I would also think that if i increased the area I would add to the high end power band.
I could be wrong! LOL