Spent 2 hours just now porting the front iron. My hands are numb. The porting is only roughed in too. I used a dremel with a flex shaft, and carbide burrs from mc master carr. I still need to put on the grinding stones and then finish with sand paper sleeves. I also ported where the oil pump goes. I wonder if it helps much.



http://www.mcmaster.com/nav/enter.asp?pagenum=2546



they actually work pretty damn good. Although slow and it makes small cuts but they work good. Bits don't jump around as much as I would have expected.



Goal is to keep stock port. But smooth them out and make them transition better. Same concept as porting heads on a piston engine I guess. I'm not interested in changing the port timing, just increasing the efficiency of them.



Pics in the morning when there is light.



I'm stoked. BTW has anyone every seen the combustion O ring groove pit? My is all pitted after scraping away the carbon and other gunk. I'll post a pic of that too tomorrow morning.



I know have a lot more respect for the guys who do this for a living. It isn't easy work. It is also very easy to F it up if you aren't careful.

you got that right, but i do have a silly question. how come you didnt use something like a die grinder or even a rotozip instead of a dremal. dremals work ok for finish polish but on a port you almost need something with more power and toqure to rough cut and shape even if you just want to smooth.

I spent too much money at the bar over the x-mas break. Then I spent too much at the bar in January.



So... with my trusty 7 year old dremel I decided what the heck. If it doesn't work I"ll spend money on a real one. Plus I'm not doing a big port. Just stock ports with better flow. No die grinder, because I have no air, and no rotozip due to too much money down the pisser.



The dremel is fine in my opinion unless you are running a business. It's a hobby for me. If I was really that intense about porting and making money I would take it into work, make a 3D model, and upload it to the CNC milling centre and go get a coffee while the machine ran.

I find the air powered stuff has a better "feel" than electric. That's just me though.



I've used a dremel a few times (not for porting irons, but the same type of work) and I just wasn't as pleased. I think that's why your hands might hurt.



I picked up two die grinders from MAC tools during a special, 100 bucks for a straight and a 90 degree grinder. Pretty sweet stuff, I've put alot of hours on them already at work and they still operate like brand new. Best 100 bucks I ever spent!



As long as you don't mind the dremel, then all the power to you! More than one way to skin a cat, the point is your porting is almost done!

I prefer a big electric drillmotor. In my experience, porting is fastest and easiest with a low speed motor and lots of leverage/force on the bit.



You can't get low speed with an air powered tool, since the torque drops off markedly at good speeds.



Porting with a Dremel is like painting a car with a Q-Tip, it can be done, but it takes a long time and it doesn't come out very nicely.

i have done quile a few ports with a dremel, a nice 10 speed one, with a flex shaft, and foot pedel to contrlo. when it comes to takeing off materal i just crank it to full blas and go to town.



it did the timeing on this port in 45min with a dremel

With a nice big drillmotor and sanding rolls, it takes about an hour to do all of the intake ports. That's just for a "street" port with no adding material or cutting for a bridge.

all of BDC's ports are done with w dremmel.

Nice. It's all about what you're most comfortable with

I find with the electric you need a large industrial one with a foot speed to be worth while. Dremel shafts are to small and flex allot causing the bit to jump, they also take to fine of chunks out of the port area making it hard to change timing with. The effect also allows the bit to jump up onto the surface more often. However I use air and like it thou your hands get cold with the air running thru it for long periods of time.