not your typical porting question.

['99350t]

well i finally did it, after a bunch of reading, and comparing what works with what dont from different guys i tried my own port job. it looks pretty nice i think but iam just curious what can i do to these to ensure they're done right, and identical to each other?should i send them to a company and have them template them or something? its running alittle rough, but i dont know if its because my carbs are just junk (small stockers bored out alittle)? i know all porting is different thats why i think i want to have a professional check them out.

[Snopczynski]

What did you do to the cylinders?

[blowit]

well i finally did it, after a bunch of reading, and comparing what works with what dont from different guys i tried my own port job. it looks pretty nice i think but iam just curious what can i do to these to ensure they're done right, and identical to each other?should i send them to a company and have them template them or something? its running alittle rough, but i dont know if its because my carbs are just junk (small stockers bored out alittle)? i know all porting is different thats why i think i want to have a professional check them out.

 

 

Post up some pics so we can see. There ARE critical dims that must be adhered to or you risk junk cylinders. Post up your port durations and port/time areas and we will go from there. The only way to ensure uniform flow between cylinders is a flow bench. Two strokes require very special adapters for such testing to isolate critical areas of flow.

 

 

Brandon

['99350t]

Post up some pics so we can see. There ARE critical dims that must be adhered to or you risk junk cylinders. Post up your port durations and port/time areas and we will go from there. The only way to ensure uniform flow between cylinders is a flow bench. Two strokes require very special adapters for such testing to isolate critical areas of flow.

Brandon

 

 

okay, i dont have a camera so i will try to find one and get some pictures on here, thanks alot.

[fck4strokes]

I hope you had them honed after if not your rings are probally shot from the lip created from porting the cylinders????????????

[FireHead]

Post up some pics so we can see. There ARE critical dims that must be adhered to or you risk junk cylinders. Post up your port durations and port/time areas and we will go from there. The only way to ensure uniform flow between cylinders is a flow bench. Two strokes require very special adapters for such testing to isolate critical areas of flow.

Brandon

Word. :geek:

[370banshee]

as the guy said above there are certain "rules to stick by" as in how much you raise the ex port in comparison with the transfers.. the differnece divdied by 2 is whats called "blowdown" if this blowdown figure is way off it'll run like crappy.. as for keeping things even.. if you marked everything correctly and cut carefully to those lines.. your gonna be close enought for what your trying to do.. i'm guessing this isn't some super technical race motor.. the flow bench... again not somethign youir gonna ned to worry about for a play motor.. in fact.. most hiogh end race shops don't taek the time to FLOWBENCH cylinders..