Who's boring plastic MFI stacks?
 

I need to get a set of plastic 911T MFI stacks bored out to S/RS size.

I asked Henry at Supertec a while ago and apparently Aaron stopped doing it, and I don't know where else to turn.

Anyone else doing this?

Eurometrix maybe. Ask Mark Jung, 356rs.

Big changes for me , but I will resume this work this year. I’ll send out updates when I’m set up.

I’ll be moving into Retro-Sport’s 15,000 Sq feet of Porsche goodness located in the San Francisco Bay Area! Lots of work ahead to move in and get up and running.http://forums.pelicanparts.com/uploa...1686193294.jpg

Great to hear.....it seems like I may have as many as ten sets waiting for the rocket man to return to earth. The Porsche world that is.....

Great to hear! Now take my money.

May be able to help ..

As much as the "Return of Aaron" is exciting, we're designing some tooling to make boring these stacks possible with our limited equipment.
We have a crazy inventory of MFI stacks, butterflies and pumps that need to find some updates to make them more adaptable to popular builds.

I’ve got a set that were done by Mike Bruns that I’ve been thinking of selling. We should talk.

If there is going to be a considerable demand and sounds like Henry may provide that, a CNC program would I suppose be justified. If you are just doing one, the only piece of equipment needed is a mill. I realize everyone doesn't have one, But in the various gear head communities, bet someone has one. I bored out a set of 2.2 mag stacks to 47-40 for a 3.0 track motor. My method was crude and primitive, counter to standard machining principals, time consuming, but I was amazed at the finished product. A very rigid fixture for the stack assembly, a 18'' sturdy boring bar, a fixture for a 1'' spherical bearing to support the bottom of the bar while the top is held in the spindle. All of these are made by you. The bit was 1'' with a taper to match the angle of the stack bore. Dropped it in 1'' at a time and made lateral adjustments to the bit for each cut. Finsished up with 3 tapered hones with 3 different grit surfaces. Very time consuming but the plastic stacks should be easier. Bob

I am pretty sure that Karl at Thoroughbred Motorsports in Corty PA has tooling to do this.

Stacks would also be a good candidate for 3D printing.