NoPistons -Mazda Rx7 & Rx8 Rotary Forum - Pic Of My First Bridge And Some Q's

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- - Pic Of My First Bridge And Some Q's (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/pic-my-first-bridge-some-qs-30388/)

Thrust me...Pilot Holes should be drilled when doing the bridge. Why waste a good housing when all that possible could be avoided. Unless you have a huge stock of side housings.....Do the pilot Drilling. This was how I did mine for porting.

Sorry, double post. Them fingers of mine.

The finished port looked like this.

Looks nice, boost_creep!

Shouldn't the ports be longer

Quote:

Originally Posted by IGY' date='Dec 16 2003, 05:26 PM

Does anyone else drill pilot holes with a drill and then just connect the dots with the porting tool? I like to drill pilot holes at about a 30 degree angle for a guide.

I do that. That's the method I prefer -> I use a specific size drill bit, mark the area with a marker using a rotor housing as a guide to ensure the curvature of the cut (pinned on an iron), and then use a punch to mark pilot holes to be drilled. From there, I "connect the dots" with a certain type of 3/32" grinding bit, and then using a mildly abrasive grinding stone to fine-edge the cut and even everything out. It works well but takes a few to several hours per eyebrow cut.

http://bdc.cyberosity.com/pictures/R...rtCutting1.Jpg

http://bdc.cyberosity.com/pictures/R...rtCutting3.Jpg

http://bdc.cyberosity.com/pictures/R...rtCutting6.Jpg

http://bdc.cyberosity.com/pictures/A...les/Ports2.Jpg

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