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jmead

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Everything posted by jmead

  1. At the request of a few members here I would like to share my current progress on project AmpEater - the electric 240z. The motor is a 9" kostov 144v, rated to produce 15kw continuously (I'll be pushing it much harder than this in short bursts). The battery pack consists of 12x DieHard "Platinum" 12v 73AH AGM batteries which are actually rebadged Hawker Odyssey. Combined they weigh 720lbs and can produce well over 200,000 peak watts. The motor controller is a 144v/156v unit capable of 1000Amps, pumping out 144,000 watts peak. This works out to 156hp, but several hundred ft/lbs of torque. The motor is connected to the stock 4spd transmission via a solid metal coupler (no clutch). This was made by welding the hub out of the clutch onto a metal cylinder bored to fit the 1 1/8" shaft from the motor. I had this done professionally as I don't trust my welding skills for such a critical piece. The car will stay in 1st gear pretty much all the time, even when stopped (electric motor does not need to idle). 2nd may be used for the highway. 3rd and 4th are not needed. Acceleration should be quite a bit better than stock in the low end. I have not had a chance to really push it yet as the car is not yet inspected. I have $6200 total into the car right now, including every bolt and connector purchased so far.
  2. I seem to have misplaced the bolts used to mount the transmission crossmember to the mounts in the tunnel, and I have an electric motor waiting to be bolted in. I've tried every size I've got on hand and none seem to fit.
  3. The side that bolts to the engine is what I'm after.
  4. I'm in need of a bellhousing diagram for a 70 manual 4 spd (though I'm pretty sure they're all the same anyhow). Does anyone know where I could find this? I've googled around and can't find anything.
  5. I've got a 240z shell with a blown engine, everything else in good condition. LD28 engine w/ 5 speed transmission - $1700 L28ET turbo and exhaust manifold - $400 Intercooler - $250 Heavy duty springs for extra weight in front - $400? Propane Injection System - $250 (diy) New fuel lines, wvo tank, filter, heater - $500 (some diy) extra $500 for spare parts and because nothing ever goes according to plan so I've got $4k to take a lifeless shell and turn it into a one-of-a-kind "sports" car that potentially has little to no fuel costs, and at very least somewhat comparable performance to the original engine while getting double the normal gas milage. Seems fair to me I'm not really expecting this swap to pay for itself anytime soon, if ever. Really, I just wanted a project that comined my interests and had a result that was worth the money invested, at least to me. And I also doubt I'd be considering this if it werent for the fact that I've got a beautiful shell just waiting for an engine and I happened to be reading alot about biodiesel at the same time. Plus I've got a free summer and a little extra money....not for long
  6. One more question....how do diesels like super chargers? I'm worried about not being able to find a turbo manifold since I've heard that the exhaust ports are different. A super charger, however, solves that problem, as well as another. Diesels make most of their power lower in the rpm band, they dont hit the high revs most gassers make their max power at. A turbo, however, is best suited for high output at high revs, but most dont seem to make much boost at lower speeds. A supercharger, however, makes a fixed amount of boost from idle all the way up to redline, seems like a perfect fit. Not only that, but there are eaton superchargers made for imports that have electric clutches and the 2.5 - 3 L range. This could even concievably be paired with a turbo, also, for more low-end boost to help the turbo spool. The diesel engine has AC and PS, neither of which will I be needing, so one of these spots should be perfect for a SC
  7. does the 280zxt exhaust manifold bolt up to the LD28? I've read on zcar.com that it does not, but I've also read that it does. Anybody have any knowledge on this? How did the other diesel 240z turbo that engine?
  8. what size turbo should I be looking for? I want something that will spool quickly and devlop full boost pretty quickly. Diesels make most of their power lower in the rpm range, so a turbo that doesn't spool until 4000 rpms is as good as worthless. I dont want a ton of boost, either, just enough to pick up performance to a reasonable level. Engine life is just as important as power
  9. I have been thinking about the turbo path. I have questions about how well a turbo mixes with alternative fuels. Does diesel have any "octane" rating like petrol does? It seems to me that dino diesel/bio diesel/WVO/SVO would all have different characteristics, but I dont see how you tune to engine to run with these differences when your fuel isn't always consistant. Also, I've been doing some reading on propane injection as a possible turbo alternative. I've read that a conventional diesel only burns ~75% of the fuel to produce power, the rest is expelled as smoke and soot that gives diesels their characteristic dirtyness. I've read that with the addition of propane, this burning becomes much more effecient and this number jumps to ~95%, not only making the engine much cleaner, but producing more power at the same time. Does propane really enchance the combustion this much? Why doesn't everyone run propane?
  10. Well, I went ahead and made the purchase. I should have the engine and trans by next week. I realize this motor isn't going to be a screamer, but that isn't the point. I want something to get me from point a to point b, cheaply, and even if its not fast, it will still be stylish. I suppose alot of my effort should be concentrated on aero and weight, just as much as HP. What are the easiest ways to streamline a Z? It seems pretty sleek as is, but there is always room for improvement.
  11. How about the engine cost. Does $1700 sound fair? The price sounds OK to me....but i dont want to find out a couple weeks down the road that everybody else pays $500 for a complete LD28 and I got ripped off. Normally I just look at past sales to get an idea of a fair price, but I dont have anything to go on.
  12. I've been reading alot about diesels recently, specifically for bio-diesel and SVO/WVO capability. I've got a 1970 240z Chasis with a blown engine, thinking a diesel swap would be a cool choice. I've found a LD28 complete engine w/ 5 speed tranny shipped to me for $1700. I haven't found any other engines like this for sale, so I have no idea if this is a fair price. I'm also a little worried about finding parts for this engine.... google turns up little and I'm not sure where to look. The thought of this swap really excites me however, I've read another diesel 240z gets 44 mpg, and fuel you can get for free at most any resturant sounds too good to be true.
  13. so how did that quarter make its way into the engine in the first place, anyhow? weird.....
  14. hey, that's pretty cool I'm not really an arsty kinda guy, but if I had a vase sitting around I wouldn't have any problem sticking something like that in it
  15. yeah...I agree If I'm going to crash my car at 140mph...I'm going to be in it, and me alone It's one thing to kill yourself...but the innocent passenger, well, thats not good..
  16. nah...it could happen how, you ask? Well...it says it takes 118 octane fuel, so a compression ratio of 20:1 or so... But yeah, 1500hp NA is hard to take. If you look at the kind of cash in that thing...well, it could happen.
  17. hehe, no problem...I just thought i'd point that out incase there is anyone else here looking to get one for themselves too
  18. Just FYI, its waytekwire, not watekwire http://www.waytekwire.com/ Thanks for the info though, that looks like a nice unit! I might be looking into that myself...
  19. any chance that you're running old gas? Maybe the gas is cruddy and the cleaner is the only thing that lubes them up enough to work?
  20. yeah, how did you come to 240mph, anyhow? 200 is a much more reasonable, maybe even possible, goal.
  21. I finally just did it and ordered my megasquirt kit. I'm still planning on a chevy 350 in there soon....but I've always wanted to try megasquirt so it can't hurt to play around with. My real question though is what sensors are people using on their l28 setups? The megasquirt seems to be set up to run the GM coolant and air sensors out of the box, but I'm not sure on the install of these. Does the coolant sensor just swap right in for the datsun sensor? (and the datsun doesn't even have a air temp sensor, does it?). Where would the air temp sensor be mounted then? Any convenient place? I guess thats it for now, though I'm sure I'll have plenty more questions real soon. Thanks (ps, I searched, couldn't find anything on this. Sorry if its been asked before)
  22. holy crap, that is AWSOME forget moving the coffee table out of the way to play twister or whatever....
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