R32RennSport
Outlaw Amazonian
- Joined
- Nov 20, 2011
- Location
- Atascadero, CA
Excellent David. This project is really shaping up nicely! I wish I could find time to get out to the garage and continue on with my Amazon, this definitely is motivation!
Hello Guest, welcome to the initial stages of our new platform!
You can find some additional information about where we are in the process of migrating the board and setting up our new software here
Thank you for being a part of our community!
Thanks, after a lot of planning the bar is coming along OK.
Yes, he is a talented and very clever man!
I'm also a fabricator and engine and general machinest so I do things a bit differently with what I have at hand. I use large dia. ball-ended roughing mills and multiple-tooth end mills with inserts in a large vertical milling machine w/a tilting vice and can cut an end quickly.
The blade teeth in a HD vertical band saw work well for other the other shaping needed while holding the tube by hand and swinging it back and forth on the saw table, almost works like an aggressive file. Finish off by chamfering the OD of the end on a large floor pedestal mounted horizontal grinder.
Can finish off a joint this way quickly. The welding is by a mig which can be done much faster with a somewhat different finished look with about the same strength as when using a heli-arc.
The tubing is 1.750 DOM .093 mild steel.
I'm a fabricator, too! I used to build bike frames and mitered on a mill with hole saws, but those tubes are much thinner and lighter than roll cage tubing. I'm gathering material to build a tube frame RWD mid engine Karmann Ghia so I'm moving up on tubing specs. I have a Bridgeport and I'm shopping for a lathe. I think mitering on a lathe might be the way to go, lots of U tube on that, but would like to see some pics of your mill set up, if you have the time. Keep up the good work!
Thanks for your interest, the set up has all been taken down for now after finishing all of the tubes, but I use a vice similar to this one: https://www.travers.com/super-precision-3-way-tilting-machine-vises/p/36138/
Wow that's crazy! I love the sticker on the back window BTW, that was even true for my P2R. No one ever suspects the Volvo.
The bar looks good! Bonus on making it to where you can get it out of the car. Helps with paint and finish welding if nothing else.
I got super lucky and snagged an old B20 R-Sport head on eBay many years ago. Super cheap because the race motor had sucked a small nut in (from a DCOE) and it had rattled around in one of the cylinders before they shut down the motor. Similar to yours, I cc'ed the chambers and it would have been about 11.5:1 on top of a B20, even more on top of my 2.1L bottom end. But I used a set of dished B21A pistons on the bottom end, which got me the cc's I needed for street use.