Boost Ports

[dusty_v141]

Hey im porting my cylinders and was thinking about puting in some boost ports . I will be rideing trails and i own a motocross track so do yaw think it would make my power band too short. and what size would be good too go with; i have heard that if you make them too big not enough of the fuel mixture will go into the crankcase and will not get enough lubrication too the rod and crank bearings. is this true? thanks for all the

replyes.

[J-Madd]

Are you familiar with porting Banshee cylinders?

[jbooker82]

Are you familiar with porting Banshee cylinders?

Its not hard you just hog everything out as big as possible.

[dusty_v141]

im reading everything i can get my hands on and just trying too gain as much knowlage as possible about them while im saving too buy the tools i need

Edited November 5, 2009 by dusty_v141

[Screaming Yellow Zonker]

ok first question... what are your reasons for trying to port your cylinders??

Next in your sig it says -2 degrees timing... why not run advanced timing where it gives you power?

 

If you are looking for more power advance your timing to 4* advanced and save your money for a cool head...

[dusty_v141]

well when you advance your timing it gives you more power down low and takes away from your topend so if you retard it you get more topend. i was running asphalt and was trying some stuff and it does work. i also put at +4 and ran up the road too holding a gps and checked my top speed then did it at -2 and it was faster but not alot it just lets it rev farther.

[uwenr]

well when you advance your timing it gives you more power down low and takes away from your topend so if you retard it you get more topend. i was running asphalt and was trying some stuff and it does work. i also put at +4 and ran up the road too holding a gps and checked my top speed then did it at -2 and it was faster but not alot it just lets it rev farther.

Holding a GPS?? I use the ol lick my finger and stick in the air to check my top speed.

[AKheathen]

Holding a GPS?? I use the ol lick my finger and stick in the air to check my top speed.

i just open the barn door.......alot more sensitive than my finger......but i don't lick it...

[lmaloch]

Wow. Let us know how it turns out.....

[potpye]

You should have someone that knows what they are doing, you cant just hog the jugs out. Also you have to be careful when drilling the boost ports as you can go through the side of the cylinder real easy.

[dusty_v141]

im done with them now and i didnt put the boort ports in ill wait and see if i like it how it is first.

i ported them

EXT 188*

Transfers 125*

66% ext width and a blow down of 31.5.

[bad 350 shee]

can u post pics of ur port work

[dusty_v141]

sure can anyone tell me how too post the pics i have a photobucket account but i cant get the link too work right.

[dusty_v141]

here are thi pics of my porting. i have not polished the ext ports yet and im going too smooth the intake up just a little bit but not much.

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Edited November 14, 2009 by dusty_v141

[SLORYDER]

Make sure you chamfer them there ports