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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#1
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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, 04:44 PM
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#2
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Senior Member Group: Members Posts: 1,705 Joined: 8-April 06 From: Hesperia Ca Member No.: 5,842 |
Well, after the side track with the engine I got back on track to do the front anti-roll bar. The car lacked any anti-roll bars from the factory, and I feel that that's what cost me the most time at last years Nite AX... well, that and my lack of skill! (IMG:style_emoticons/default/biggrin.gif) So I set to work. After looking at what was available from Tarret and Weltmeister for $470, I figured I could fabricate some for cheaper. I started with the 1" hollow bar sold by HRP world (http://www.hrpworld.com/index.cfm?form_prod_id=216,212,363_1424&action=product) , and the accompanying splined aluminum arms (http://www.hrpworld.com/index.cfm?form_prod_id=216,212,363_1428&action=product)
For starters the arms were too long to even FIT in the wheel well. There would've been serious tire clearance issues, so I had to cut them down considerably. I ended up taking almost 7 inches off of the end. There also aren't any holes for drop links to attach to, so I had to make those. I knew I didn't want slots as they are rather weak, but I figured that the arms were so thick that I could get away with two staggered rows of adjustment holes. Very long story short, I ended up with 28 adjustment holes in 1/4" increments. When I say they are 1/4" increments, I mean that from center of the bar to center of the drop link hole. I actually trigged out every hole so that the center to center distance would be right. This doesn't mean anything right now, but when I learn how to calculate spring rates of these bars, I'll be able to do so accurately. So I set the part up in a CNC mill and located off of the splined hole, wrote a quick CNC program to spot drill the holes, and then just edited the same program for the drilling and tapping operations. They are tapped M8 X 1.00. A more experienced guy at work did help me with the setup a bit, and I'm very grateful. I didn't even ask, he just offered! This here's to you, UB. (IMG:style_emoticons/default/beerchug.gif) Oh, forgot one thing. I threaded the arms because I wanted to make them hug the inner wheel well as much as possible, and I didn't want bolts and nuts sticking out on the back side. Also, it will make adjustment easier at the track, as you won't have to worry about blind-threading a nut. Mark D. |
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