Build Thread: Restoration and New School V8, Photogrammetry: Pics to CAD |
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Build Thread: Restoration and New School V8, Photogrammetry: Pics to CAD |
Joemo5 |
Apr 5 2018, 12:07 AM
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#1
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Member Group: Members Posts: 54 Joined: 1-April 18 From: Charlotte, North Carolina Member No.: 22,011 Region Association: South East States |
I probably should have joined 914world and started posting earlier but I have been reading and learning ALOT about these cars already from whats posted in other threads. For that, I thank you guys. I have some catching up to do. Heres my story.
I picked up my first 914 a few months ago as a project car that could eventually serve as a track car or weekend toy. Out of the many different types of cars that would make cool projects, I ended up with the 914 in my crosshairs after I discovered that not only they were mid engine but v8 swaps where not uncommon. Other factors include I had never came across one in the wild, which makes them rare to me. I also like the idea of following in my fathers footsteps with a mid engine european car. He had a Lotus Europa in is 20's. Jumping back the v8 idea though, the added weight of a more powerful drivetrain is at the center of the car, meaning there is a minimal increase in the rotational moment of inertia: the car should retain it's handling characteristics better than a v8 swap in a comparable sized car with a forward mounted engine. After investigating several craigslist ads that turned out to have missing titles, a friend pointed me towards a local Porsche shop that was known for 914's. Bingo. More 914's than I expected. A few short conversations led to a cheap car that needed some work and was up for grabs. Heres what the '75 2.0l car looked like prior to being yanked out of the weeds. On the trailer headed home Some of my buddies and I broke out a pressure washer and the car looks good for sitting outside for a year or two. The car did not have the original engine or trans installed when purchased. Although, they were included in the sale. Some tinkering around got some of the electronics working off a jump start box Now heres the fun part. A month or two later, I came across a craigslist deal that would add some originality to the project. An 5.3l L83 out of a 2015 silverado with only "15,000" miles for $1200. Would an engine with 15,000 miles still have the assembly grease in between the rocker and top of the valve? (IMG:style_emoticons/default/confused24.gif) For those of you unfamiliar with this engine: It's NOT an LS, its part of the EcoTec Gen V family. The next generation of Chevy v8 that shares some of the architecture with the LS but with direct injection and variable valve timing. Also its an aluminum block which is different from the Gen IV 5.3 truck blocks which were cast iron. Rumor has it that GM is offering a stand alone kit for the gen V engines which, while costly, would simplify the install a lot. Quick specs: Stock 380hp and 416 ft-lbs on e85 fuel. 11.0:1 compression ratio ~400lb dressed. Anyone know how much the original 2.0l engine weighs? At this point I'm sure most of you have thought: "What does the hell hole look like?" The rot is the worst of all the ones I have viewed online. The only saving grace is that after selling the original motor, trans and wheels, I have made back the purchase price of the car and have a few bucks in my pocket. I have some experience in fabrication and plan on being a sheet metal pro by the end of all this. Heres a shot of the floor pans and fire wall area. At this point the car is stripped and ready to be mounted on a rotisserie. Lots of bracing prior to mounting on the rotisserie of course. I have more pics and more details but that should do for now. Attached image(s) |
Joemo5 |
Sep 16 2019, 09:54 PM
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#2
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Member Group: Members Posts: 54 Joined: 1-April 18 From: Charlotte, North Carolina Member No.: 22,011 Region Association: South East States |
Pics of the afore mentioned boxster suspension that I brought home today (IMG:style_emoticons/default/piratenanner.gif)
Heres the current idea: Use all of what's pictured but instead of a macpherson strut, convert it to a double A-arm suspension. The top mount for the strut is nothing but a clamping diameter. Fabrication wise, it shouldn't be too hard create an upper ball joint mount out of a chunk of aluminum that fits into that clamping diameter. Extending said chunk of aluminum out the bottom of the clamping diameter should allow attachment of a steering arm that sticks out rearwards and allows the use of the 914 steering rack. Maybe a little far fetched but i think it's feasible. Since I have both the 914 and boxster suspension sitting in my garage, I weighted them both to get a comparison. I used a bathroom scale so these aren't all that accurate. 914 Suspension including: cross member, control arms, torsion bars, struts, rotors, calipers, hubs, and sway bar 113 lbs Boxster Suspension including: Everything listed above EXCEPT struts 98lbs The boxster rotors are really heavy.. like 16.5 lbs heavy. While we're on this suspension topic.. here's my current plan for the rear suspension. I would like to swap in a suspension that will play well with the front suspension that I have chosen. The boxster, cayman and 996 all have front suspensions that are very similar. The 996 however, has a multilink rear suspension that looks like it would fit very well into the rear of a 914. Here's a google pic for reference: Use your imagination here.. take the above components, build a rear subframe that houses the engine and transmission. Wouldn't look identical but heres another picture for reference. I'm definitely headed down a path of unknowns. it will be hard to put my thumbs on exactly what modifications need to be done before taking accurate measurements and putting it in optimum K. Ideally the rear would be a direct swap in and then alter the front double A-arm's until there's an acceptable roll axis and camber curves. The 996 rear suspension is likely catered for the rear engine and higher polar moment of inertia so there's that to deal with.. Why do I want to go down this path? - My boxster S calipers are a direct fit to the boxster knuckles and should be to the 996 knuckles - No compromised trailing arm geometry - 4 corner wheel speed sensors (lots of options: ABS, traction control, etc) - An off the shelf axle may work with my G86.20 trans: more research needed - Off the shelf boxster/996 rotors and pads - Use of this: https://www.jrishocks.com/shop/specialty/hy...ic-ride-height/ |
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