need an opinion on cylinder porting

[Devilman910]

i got an extra cylinder to practice proting and polishing my cylinder according to ken oconnors videos can someone take a look at the pictures of my practice cylinder and let me know if what i did is good enough or if there is something eporlse i need to do to the ports especially the intake port the videos didnt show that part all i had to go off of is pictures so i just smoothed everything out without changeing anything if the image links dont wirk the pictures are in my profile album

http://www.blasterforum.com/members/devilman910-11242/albums/96-plaster-project/4509-img-0283.jpg

http://www.blasterforum.com/members/devilman910-11242/albums/96-plaster-project/4508-img-0282.jpg

http://www.blasterforum.com/members/devilman910-11242/albums/96-plaster-project/4507-img-0281.jpg

 

[blaster01]

looks pretty good to me, but obviously im not pro at porting, it just looks good a smooth

 

[scotj77]

lookin good so far. the only thing i would work on would be the bridge in the intake. try to make it into a point towards you so the gas and air flow past it better. let me find a pic

 

[scotj77]

ok here ya go. this is some porting i did on a jug i had. never got to run it but a buddy of mine is going to. just ignore the hole's drilled in the corners.


hold on i'll find the link can't move the pic

http://www.blasterforum.com/engine-13/thanks-ken-29742/

 

[Devilman910]

lookin good so far. the only thing i would work on would be the bridge in the intake. try to make it into a point towards you so the gas and air flow past it better. let me find a pic

Yeah i saw that in a pic on kens page but the intake looked different like a cylinder off somther other than a blaster to me so i didnt copy what i saw

 

[scotj77]

here it is. i did this myself with tools you can get anywhere

http://www.blasterforum.com/engine-13/thanks-ken-29742/

 

[NEONNIGHT34609]

i think you did a good job better then me. i knocked off alot of my high spots and casting marks but didnt really go too crazy with it.

 

[Devilman910]

here it is. i did this myself with tools you can get anywhere

http://www.blasterforum.com/engine-13/thanks-ken-29742/

So just cut the post in the middle at an angle on both sides and do you make the smaller port in the middle any bigger

 

[brandoz28]

only change the sizes of the ports if you know what you're doing and why you're doing it or you could end up with something that runs worse than stock

 

[sicivicdude]

I worked my intake bridge into a bullet shape.

 

[scotj77]

I didn't change the ports at all. i just made a point on the centerpost to increase flow. i didn't make that port on top bigger. i just took material away from the top of the intake to also increace flow to that port

 

[Devilman910]

only change the sizes of the ports if you know what you're doing and why you're doing it or you could end up with something that runs worse than stock

Good point man i didnt even think about that, so just put the angles on the post in the middle?

 

[brandoz28]

yeah i'd just smooth the radii, do not make the holes in the sleeve any different

 

[Devilman910]

I worked my intake bridge into a bullet shape.

What did that do for you

 

[scotj77]

did you look at that link brando. it's the port job i did and never got to run. and yes i agree completely to leave the port size alone

 

[brandoz28]

that looks pretty good scot, i wasn't really meaning yours, but to make sure that devilman didn't make a mistake.


and rep for both of you guys for doing it yourself

 

[scotj77]

NO I give u rep brando

 

[brandoz28]

hey scot, what size bore was that other jug on? i could bolt it on to one of my bottom ends and let you know how it runs lol

 

[Devilman910]

that looks pretty good scot, i wasn't really meaning yours, but to make sure that devilman didn't make a mistake.


and rep for both of you guys for doing it yourself

Thanks for your help brando. Scot what tools did you use to get your exhaust port so smooth

 

[scotj77]

I think it was a 67.50 brando. i gave it to my buddy and he is gonna run it as soon as i send him a set of rings. i'm diein to know what it will do. the only tool i used on the exhaust port was my finger and sand paper. my x really appreciated the practice. I knocked everything down with a drum sander on my rotozip with a cable attachment. then everything else by hand 400, 600, 800 grit. polished it alittle with some drill polishing attachments but they didn't really fit in there very well.