Sesshoumaru

I used mostly a bulb and a ball



I couldn't use one of my ball bits b/c it would just eat too much too fast.



I'm still experimenting. With bits/techs



a good grinding bit can work good too

Drago86

I'll have to check out walmart, i orderd mine from widget supply, theve got a pretty good selection. I don't have a 1/4 inch die grinder or id use that, and im not about to go buy one just for this, the dremal worked great for the actual ports, its just the runners im having trouble with.

Sesshoumaru

yeah those are about impossible with out the dremel flex shaft



got mine for 15 bucks shipped off ebay

psyclo

go the way of the rx8 and make a bunch of intake runners, then just grind out some more ports. control it via EMS and butterflies. we could have 10 port cars running around, full power from 1-8k RPMs



Some brain food I just thought of, a way (i know it probably doesn't exist) of changing the runner/port cross-sectional area directly with rpm.

83turbo

Seem that something is lost with the 6 port type endplate ports...

My understanding was that there is more power to be had with a 4

port setup with less port timing than the 6 port would have. I

realize you are talking "wide power band", but this is still relevant.

If you had a little intake port that closed at maybe 35 ABDC, with

an auz port above it that closed at maybe 65 ABDC, with both open

it would probably not make as much power as a non-variable port

with a 65 ABDC closing time due to the divider. To match that power,

the aux might have to go to 75 ABDC, at which point it wouldn't perforam

as well at high RPM as a non-variable port of the same closing time.

I don't know if I'm expressing this one clearly.

Now if there is some other clever way to make a variable port, that

woulc be slick. There was some talk on vintagerotaries about

peripheral porting with reed valves...maybe the reed could be forced

open mechanically at higher RPM so as not to be restrictive.