Case porting

[Bill]

Im going to get some porting done soon,just wondering if case porting is worth the $$$$ for A woods/mx port.thanks

[blue02]

You can always do it yourself, if you have the right tools. Here some case porting I did myself.

[okbeast]

How do you guys recommend doing it. Is a dremel gonna be enough tool to do it?

[blue02]

I used a die grinder, first scribed the gasket lines, then used a carbide bit till i was close to my scribe lines. Then I used porting sanding rolls to blend it in and take it to the scribe lines.

[Bill]

What type of gains do you get porting the top case?

[blue02]

They say the gains are minimal, maybe 1-2 horsepower. The gains are probably larger the bigger the motor you have. But I had everything pulled down already, so every little bit helps.

[Wildcardracing]

Don't have any dyno #'s to prove it, but from my experience it makes a difference in the bottom to midrange the most, but is a slight power gain accross the board. The intake charge has a smoother path to flow into the transfer ports so it maintains better velocity.

[lowbuckracing]

FLOW!nice and smooth..no bumps in the road!

[Leadfoot350]

Its not done to increase the size that much, what its done for is where the cylinder and the top case meet up do not match that well. There is a 1-2mm lip that blocks the transfer air from coming up. So basically all you are trying to do is take the lip out. You can feel it with your finger if you have it apart.

[Bill]

Oh I see, so it can easily be done with A dremel and the right bits.

Thanks alot for the info guys.

[okbeast]

The method I've heard being used is you take a gasket and mark out or cut it out the size of the cylinder transfers and transfer that to the case, any other methods?

[KaosBanshee44]

I'll tell you my method, I sent my cases to Jeff and had em' trenched and ported all at once, got it over with and trusted someone that has done it before do it for me....lol

[kawiking]

yep..same here cody.. i just let jeff do my portin on my cases

[Bill]

I know cylinders should be left with A professional but the cases look like something I could do.Just match it up and smooth it out.

[blue02]

Case porting is actually just gasket matching to reduce any flow interruptions, I think people are worried because cylinder durations and such need to be exact in order to benefit.