All the cool kids are doing it..., Low budget progress thread (Slow Race prep.) |
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All the cool kids are doing it..., Low budget progress thread (Slow Race prep.) |
BMXerror |
Sep 17 2007, 09:42 PM
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#101
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Senior Member Group: Members Posts: 1,705 Joined: 8-April 06 From: Hesperia Ca Member No.: 5,842 |
Well, with all the work that I'm doing to my car lately, I might as well start my own progress thread.
Backstory I bought 4702912742 from my pops about a year and a half ago for $600 dollars, but it wasn't a steal. It had been sitting for about five years and needed a lot of work. He A couple years later he had been looking for a teener for a little while and picked this one up cheap at a dealership in Pomona Ca. He drove it for a while, but it had tons of problems, and soon he decided to sell it. However, the person who test drove it blew first gear, and out to the back yard it was sent. Fast forward five years to when I was financially ready to get a car to start racing. Long story short, after deciding that I wanted the 914 instead of an older Miata, I told him I was interested. He said that if I bought him a set of mufflers for his bike, we'd call it even. After that I spent about another 4K just getting it drivable. I replace all four rotors, rebuilt all four calipers, replace the brake lines with braided steel, replaced the hard lines that I broke, replaced the master cylinder, resealed the motor (after my socket and extension locked the motor up), bought two trannies for it (the first one was no good), put a new clutch and pilot bearing in it, put new rubber on the ground (Khumos), fixed and lubed all kinds of latches and hinges to be able to get into all the various compartments, replaced most of the vacuum lines and fuel lines.... the list goes on. These were all just stock replacements to get it running well. I further had to fight with the injection system for a few months until I figured out that I had it hooked up wrong. (IMG:style_emoticons/default/headbang.gif) Of course, this is the very abbreviated version of the story. As anyone with one of these things knows, the words it takes to describe what parts you changed don't even come close to showing the blood, sweat, and yes, sometimes tears that you put into your work. But anyways, it is running decent now (the motor is still a little tired) so it's time to do some improvements. After all, racing is what I bought the thing for. So I'll try to bring anyone who cares up to date on some of the things I've been working on. Mark D. |
BMXerror |
Aug 22 2008, 04:59 PM
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#102
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Senior Member Group: Members Posts: 1,705 Joined: 8-April 06 From: Hesperia Ca Member No.: 5,842 |
I got the bearings from the Big Bearing Store online, and just used the pressed steel housings. The housing is flared to hold the bearing, and that flare is a little over 2-1/4" DIA. So all I did is hole saw a 2-1/4" hole in the wheel well and drill two holes for mounting bolts. It sounds cheesy, but it seems to work well. What I had in mind was that when you tighten the bolts it would compress flare of the bearing housing into that 2-1/4 hole, making that large hole the load bearing surface, and not the two small bolt holes. This theoretically eliminates the need for any further reinforcement in the area, at least with the relatively soft bar. I've run one AX with it as well as some spirited canyon driving, and there seems to be no signs of cracking or excessive stress. Sorry, I don't have any pictures of the bearings from the back side. I was in a serious rush and actually lifted the car, figured out how the bearings should go in there, laid it out, drilled the holes, drilled the bolt holes, measured for the bar length, set the car down and cleaned up in an hour and a half. I didn't really think to snap any shots.
Problems: 1. In my rush of laying the bearing holes out without the gas tank in, I didn't think to make any consideration for the height of the bar, as it relates to the bottom of the gas tank. Once the bar was in and the gas tank was reinstalled there was the tiniest little drag on one side of the bar (I was looking for it by then as I figured out later that that might be a problem). A couple minutes of "adjustment" on the gas tank with a sledge hammer and a block of wood cleared that problem right up, (IMG:style_emoticons/default/smash.gif) but it's still VERY close in there. If I go to a 1-1/4 bar later, something else will have to be done. 2. The bearings I bought were about a 1.0002" bore, and the bar miced in at about 1.0006. I figured it easier to hone the bearings than knock all the paint off of the bar and hope I wouldn't have to grind it, so I went ahead and honed the bearings. I still can't slide the bar all of the way through, but the part that needs to fit, fits, and fits tight! Mark D. |
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