Back At It – LS Frontrunner
Arrived back home from our trip to Texas. 3,000+ miles. Went by the Embassy in San Marcos on our way in and out of town. Looked pretty quiet without all Cobras that will be there in a couple weeks. For those that will attend, have a great time. We made it there two years ago. But timing just didn't work this year. Had a nice family visit and was great meeting our fourth grandchild for the first time. Special memories.
While gone, Vintage Air shipped my frontrunner setup. So was waiting for me when we got back. Still nothing on my power brake setup. I’m working on an alternate plan and expect to make a decision this week if the supplier doesn't come through. Finished installing the frontrunner setup today. It wasn’t cheap. But I’m very pleased with the quality, the instructions, how everything fit, and now the final product. The components are all high quality including a nice 170 amp alternator, Sanden A/C compressor, an ATI Super Damper harmonic balancer, nice billet aluminum mounts for everything, and even ARP hardware. The biggest challenge was changing out the stock balancer with the ATI piece. None of the tool rental places had a puller for an LS style balancer. So Amazon to the rescue even though I probably (hopefully…) won’t use it again. Also picked up a flywheel lock. Cheap and not sure I could have accomplished the swap without it. Followed the directions exactly and everything worked out. It's a good pull and right at my limit to get the retaining bolt for the balancer torqued. But done. I still have to get a different thermostat and thermostat housing. Other than that, ready to go. Both length and width worked out fine. It’s going into fit in the chassis and body just fine. Here are some pics. Will go back to working on the doors for now.
https://thefactoryfiveforum.com/atta...1&d=1615948945
https://thefactoryfiveforum.com/atta...0&d=1615948938
Power Booster and Master Cylinder Installed
Today I finished installing the vacuum power booster the Wilwood dual master cylinder. I posted pictures previously of the unit hanging in the tentative position on the firewall. Now it’s firmly anchored. As usual, more work than expected. But no surprise. Working and fabricating with steel is significantly more time consuming than aluminum. At least with the tools I have.
After finalizing the location, cut the hole in the frame as I mentioned last time. I bought a 12" x 12" x 0.1340" piece of steel sheet from McMaster. Nothing like that in any of the box stores. I had determined that .125 (1/8”) would be fine. But for whatever reason the exact material in 0.1340 was much cheaper. And since this is a budget build (!!!) went for it. Cut a roughly 6” square piece for the firewall mount and cut the frame so it’s sits flush. If I welded, I would have welded in. But I don’t. Taking the frame to a welder or having one come to my garage I decided wasn’t necessary. I bolted in place with six grade 8 5/16” flat head screws, hardened washers, and distorted thread locknuts. The 1/8” aluminum firewall will be bonded and riveted over the whole thing and add another layer of strength. I’m confident it’s not going anywhere. Here is the plate installed and then the power brake assembly mounted.
https://thefactoryfiveforum.com/atta...9&d=1618712412
https://thefactoryfiveforum.com/atta...0&d=1618712421
Then onto the inside. I made two right angle brackets out of the same 0.1340" steel sheet that bolt to the shelf where the Wilwood pedal box would normally go. These also could have been welded. But are bolted in place with seven grade 8 5/16” rounded head screws, hardened washers, and distorted thread locknuts. Rock solid. I determined the height and location previously with quick mock-up pieces out of .040” aluminum. Then committed to the sheet steel and installed. Both the firewall plate and the angle brackets are now permanently mounted. I have no intention of removing them. They'll stay in place when I send the chassis out for powder coat.
https://thefactoryfiveforum.com/atta...8&d=1618712401
https://thefactoryfiveforum.com/atta...1&d=1618712429
The brake pedal itself and orientation is still a work in progress. The pieces I have can be installed several different ways. I’ve started work on the bracket to hold the LS drive-by-wire module (accelerator pedal) and will work those two things together to finalize the locations. Also seen in this picture is where I propped the steering shaft into it's intended location. Also that I moved the Ididit steering column mounting arm to the outside of the LH mount. Both necessary to finalize the proper location of the brake arm and in turn the booster/master cylinder. Everything gets pretty close in there.
https://thefactoryfiveforum.com/atta...2&d=1618712436
With the booster mounted, brake arm swinging, clevis in place and adjusted, and getting the Wilwood specified 1.1” of pushrod travel, time to mount the master cylinder. I bought the master cylinder, booster, and pedal arm as a unit from the same company. Talked about that in a number of posts. Thought I'd use at least part of the included frame mount, but didn't. You’d think the pushrod between the booster and the Wilwood MC would be adjusted, right? Nope. I didn’t have a way to exactly measure, but with the adjuster on the booster pushrod all the way in, it was still too long for the Wilwood MC with the power brake slug installed in the piston. Not a lot, but not acceptable. There is supposed to be .020” of slack when together. After some Googling and YouTube viewing, repeatedly saw a tool that is used to measure and set the pushrod clearance. Not expensive at $25 or so. But then waiting begins again. Ran across a video where a guy made his own out of a piece of wood and a metal dowel. Inspired me to hit the shop and an hour later had my own out of 1/8” aluminum, a cut-off bolt, some tie wraps, and some instant glue. A little cheesy. But hey. Price was right and instant gratification. It’s not super critical except that the two ends need to be exactly parallel and the measuring rod the exact same length. Then, insert one end into the cup in the MC pushrod, make sure it’s seated, then measure the other side with a feeler gauge on the booster pushrod. Worked like a charm. I ground about 1/16” off the end of the slug in the MC piston, rounded it by spinning and filing in my drill press, then measured and set the booster pushrod. Harder to explain that actually doing. The MC is bolted in place and hopefully will stay there.
https://thefactoryfiveforum.com/atta...3&d=1618712449
Next up is to finalize the DBW module as mentioned. I’ve got the last pieces for my dash so finalizing the layout. I'll show that soon. Then start mounting stuff behind the dash. As Mike Peaty says "Back to work!" If you haven't seen his aviation build videos, you're missing out. Check them on YouTube. Highly entertaining. Another person with mad skills. And clearly an unlimited budget.