It's going back together!!
Now that Christmas is over, I thought I would take time to post an update. I hope everyone had a good holiday.
First things first, though. I have to make a correction to an earlier post.
Turns out that my math was off in my post about the wheel cylinders. The 1” and 15/16” combo I’m using actually gives me a 12% difference instead of the 19% figure that I posted.
The 1 1/8” and 1” combo would actually be 21% difference.
I had refigured everything for my post and don’t even know where I got those numbers. Must have left my brain somewhere else that day!:o:o
Sorry if I caused anyone to be confused.
The frame front and rear suspensions have been assembled and squared. I still need to set the pinion angle and the caster on the front end. I’m waiting until the engine is in for this step. I can go over all the bolts then and make sure they are tightened and locked.
The air compressor, valves and air bags are all mounted and plumbed. The valves are small 1/8” stainless steel units, but they're big enough for what I'll be using them for. I mounted a valve directly to each bag using solid pipe fittings to keep the two sides of the car separate. Each bag will be a separate "spring", so there shouldn't be any air transfer from bag to bag when the car leans. Should also help keep any small leaks at the tubing connections from bleeding the bags down overnight since they're essentially sealed. It has been aired up for about 2 weeks now and doesn’t appear to have leaked down.
When I was testing this setup earlier in the build, it only took about 30-40 lbs. of air to hold the car at ride height with one person on board. I would be surprised if it took more than 50-60 when it was fully loaded. Each bag has an 800 lb rating at 100 PSI. There is one valve with a restrictor mounted on an aluminum manifold to bleed off air, so only 3 valves are needed for the whole system. There is no air tank; the air compressor will push air directly into the bags. During earlier testing, the compressor took only a few seconds fill the bags if they were empty. There is a safety switch on the distribution manifold that will kill the compressor if the system gets to 105 PSI.
I’m using a GM control switch to keep the ride height where I want it. These were used on high end GM cars in the 70’s through the 90’s. They are not much bigger than a pack of cigarettes and attach to the frame. An arm and linkage attaches to the rearend. The length of the link determines the ride height. Not as sophisticated as the programmable controllers on the market today, but they’re usually cheap and as close as your local junk yard. Add a couple of automotive relays and you’re good to go.
Hard to see in the pics, but I rounded the ends of the leaf springs to make them look a little better. I also added a third leaf to the front spring packs. I didn’t feel real confident about using just two leafs. These are heavier ¼” thick leafs.
I spent a lot of time chasing threads and fitting parts where they were powder coated. Note to self: Don’t build this stuff so tight if you’re going to powder coat it! The ceramic coating is aluminum based, so I used liberal amounts of anti-seize compound. I didn’t want to risk galling the threads.
The brakes are bled, but not without some problems. I had a new wheel cylinder leaking!! No, it wasn’t one of the modified cylinders. It was one of the new ones I bought for the front. I pulled it apart and found that it was full of crap that looked like kitty litter. :eek: Nothing was damaged, but the crud had gotten under the cup lips and wasn’t allowing it to seal. After cleaning it up everything was fine, but I use a pressure bleeder and it sure made a heck of a mess before I saw it was leaking. I hate to think that I’m going to have to start pulling NEW parts down and check them before I use them. More of that good Chinese crap!:mad:
All of the hard fuel lines, the fuel pump and filter are installed. I still have to make up the braided flex lines for the fuel system.
The engine and trans is going in tomorrow.
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The good, the bad and the (almost) ugly!!
Thought I would post a quick update. Been a lot going on since the last one.
The almost ugly is that I had a water leak under the intake manifold. A few miles on the road and the engine would have been toast!!! If I hadn't decided to change the lifters I probably wouldn't have found it until it was too late.
I think the intake gaskets were too thick. These were the special Offy gaskets that came with the 3x2 setup from Hotrod Carburetion. They were .090 thick. I switched to Edelbrock gaskets similar to the Fel-Pro Printo-seal type gaskets. The new gaskets are .070 thick. I also used a little silicone on the water passages instead of the Aircraft Permatex I normally use. I'll keep a close check on the water level for a while just to be sure.
I probably had a vacuum leak on the bottom of the manifold too, since I was able to lean the idle mixture out a good bit from the original setting.
Between the new lifters and gaskets, the engine is running like a top now! The oil pressure is 50 psi at idle and it pulls 20 inches of vacuum at idle. It could probably use a little tweaking after it's on the road, but it's good enough finish the car.
The bad is that time is getting short if I'm going to make the March car shows. I have 11 days of shop time left before the first show. It's going to be close!!
Now for the good. The body is painted!!!!! I still have some buffing to do, but it's on the inside and I can't get to it right now, since the body is up on sawhorses.
It's my first complete paint job. Normally, I do the primer and sanding and get a pro to do the color. I decided to try it myself this time.
I'll get some pics of the body up as soon as I can. I've been too busy with the engine to take any after paint pictures.
I also delivered the seat insert , bed cover and door to the upholstery shop and they're working on them. They might be finished by next weekend! Hope so, anyhow.
Looks like I'm going to be pretty busy for the next few weeks, but I'll try to keep up to date with the progress.
Mike