"SteyrTMP" (SteyrTMP)
09/19/2013 at 23:16 • Filed to: Seven GTR
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"SteyrTMP" (SteyrTMP)
09/19/2013 at 23:16 • Filed to: Seven GTR | 1
| 6 |
Meh. I tried to capture the burble and the rev/BOV noises of the Seven on my way home, on my phone.
The first, shorter clip was trying to catch the burble, but mostly what I hear is the annoying rattle of the side panels. The one side effect of having Dzus fasteners holding all the parts onto my Seven, compared to the rivet method most people use. Mine is more race oriented, with the capability of reaching to, and able to replace, everything.
The second clip is just a short section of highway cruising on the way home. The first part was just to show light acceleration. I stopped somewhere around 5k, I think. Finally, I was able to show my view... I was holding the phone against the top of the steering wheel. Someday, maybe, I'll be able to afford a GoPro...
This, actually, is close to the area where I have vibration. I showed my wife the koala bear picture, and where it started, and she said that the other cars have the same vibration in the same area. It must be something about the way they are doing the new paving... maybe there's a flat guy stuck to one of the steam rollers.
I really wish I knew someone with decent recording equipment. The sounds are amazing. I don't like 4-cylinder sounds, usually, but I like the sound of it. I don't have a wild BOV, just a stock Nissan (pretty sure it and the intercooler are from a SR20DET) that vents to the atmosphere. When I have earplugs, or wearing my helmet, (preferrably both), it's much more obvious, the hiss as I let go of the throttle. I wouldn't mind having the twitter of the 911 GT1's twin turbos, but hey.
Alas, I'd have to soundproof the panels before that would work anyway, as the rattle would ruin the sound. Anyone have neoprene strips? I am thinking of lining the one-sided .062 thick, .75 wide strips wherever the aluminum touches the frame, to eliminate most of the annoying rattles and buzzing noises.
PowderHound
> SteyrTMP
09/19/2013 at 23:25 |
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I NEED something like that.
revrseat70
> SteyrTMP
09/20/2013 at 00:05 |
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I've been on roads where the material it is paved with makes a vastly different type of road noise. Almost like a roar that a whish... Sometimes the roads texture meets the resonant frequency of a certain material in the car, and it inevitably rattles it. I used to live near a stretch of highway about half a mile long where the road looked the exact same, but the frequency made my car (and no other car I had experienced) feel like the alignment was off. That's how uneasy the suspension felt, and the steering wheel had a slightly stronger vibration. My guess was that the road somehow hit the perfect frequency of my sway bar or steering rack. I could never figure it out.
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SteyrTMP
> PowderHound
09/20/2013 at 00:05 |
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Well, do something about it. Hit me up for all you need to know.
I'll help anyone make one. As long as they have the funding, they could even borrow my garage and welders. I have a primitive machine shop in my basement, as well. I figure, as long as the person had the interest, and the finances, a feasible Seven could be done inside of six months, working on weekends, for about 5k. The cost of the donor Miata (I'd use that as a base as it's the easiest for a newbie, and it's something I've already done, so it wouldn't be new ground, like the 4G63 Seven in the garage now) would vary, depending on location, year, condition, and title status.
I'd love to see more on the road. Anyone I would help would be on the road sooner than it took me, for sure, and it would be a lot more complete, because they would have to buy body parts, whereas I made mine. (I have all intentions on reproducing the panels and fenders I have, but it's going to take a while).
Anyone that has any interest should buy two books. The original book is out of print, sadly, but I have it, and it's available if you look hard enough. Either of the first three are all based on the same book written by Ron Champion, and include blueprints (although they are not good prints to build off of, I can supply those, or anywhere on LocostUSA.com . The second book that wouldn't hurt to own is Keith Tanner's book on the Locost. He went a different route, using a pre-built frame. It's not as much of informative on building, as more of a "what to expect" type of book. His website has hundreds of photos with descriptions, that would be worth a day or two to go over.
Original Locost book, now out of print.
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An older version, I think. I have the second edition.
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The New Haynes Locost book, cheaper, but less informative.
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Then there's always my other home-away-from-home forum... www.locostUSA.com/forums
My personal build log is: SteyrTMP's Seven GTR
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revrseat70
> revrseat70
09/20/2013 at 00:08 |
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I take that back. I remember my dad saying it felt weird in his GTO as well, in that same spot. So maybe its a more universal problem than resonant frequency.
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PowderHound
> SteyrTMP
09/20/2013 at 00:30 |
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5K! Well that is somewhere in the future when I hopefully have a place I can do that. And after looking through your Build thread I need to work on some fabrication skills
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SteyrTMP
> PowderHound
09/20/2013 at 00:45 |
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Well, the nice thing about building a Seven, is the fact that you don't have to buy everything at once. The donor car is the biggest purchase. Most everything else is flexible, and you buy it when you need it, or buy everything at once. You figure, about 200 bucks buys you the tubing and enough sheet steel to make the frame. That's a few weekends there. I take my time; both of the frames I've made have a 0.5mm tolerance. Your donor car supplies a lot of stuff. Depending on the width of your Locost, you may be able to salvage/modify the original seats. The drive shaft will need to be shortened/rebuilt, so that's a couple hundred usually. Other than that, the only other big purchase is suspension. I utilized the rear subframe from the Miata, so I only had to buy the front suspension parts. I would make my next batch, but I purchased the first production set of adjustable front control arms from Jack McCornack at http://www.kineticvehicles.com/ (He's good people. I've met him a few times, and he's a very smart person.) They weren't too expensive, it's the coilovers that cost the most.
I've seen people that have spent 2500, and others that have had pretty much unlimited budgets. Each to their own. Where are you located? There's probably someone from LocostUSA that lives near you. We always recommend visiting and seeing what it's like to have one.