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Everything posted by JMortensen
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If you're looking for performance, you don't want full advance all the time. Leave the mechanical and bolt/JB weld/braze the vacuum advance to the breaker plate. Then do as suggested above and set timing to ~35 total. You can also adjust the mechanical by lengthening or shortening the slots in that advance mechanism to give you more or less mech advance. If it idles at 15 or more and totals at 35 or so than you should be doing pretty well. You can change the springs on the mech advance, you want it all in by about 2500 rpm. Here's a webpage showing the tear down and reassembly steps for a ZX distributor, I'm sure it's pretty close to what you have. http://www.jrdemers.com/280ZX/distributor/distributor.html HTH, Jon
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You're right. They didn't even spit on it either . I thought it was a CA thing, but you're in CA right? When I moved to WA I thought I'd find it for $5, but no such luck. I've been to paint stores, Home Depot, Lowes, etc. Best price I've found is $8.99/gal. I'd probably forego the AV Gas if I could get a good deal on Tolulene or Xylene, although I do kinda like the idea of the leaded lubing the valvetrain. Jon
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OK, so maybe a bottle of Techron in every tank... Jon
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Thanks Bastaad for your concern, but I forgot to state that I've been mixing the AV Gas 50/50 with 92 octane. I've heard things about additives, and the fuel being less dense than pump gas, so you need to run richer with it, but never any problems with buildup. My impression was that the additives are there to make the fuel stable at all altitudes and all temperatures, as well as to make it more stable when it sits in the tank of a plane that won't be flown again for 2 months. Supposedly it contains less energy than Unleaded, and I know it is less dense. The lead should lubricate the valvetrain. All that being said, my engine seems to like it. A LOT. I recently had my manifolds off, and there was no apparent buildup on the valves at all. The guy who turned me on to the AV Gas is a drag racer and former co-worker, he's been running it for years with no probs. I suppose I could throw in a bottle of Techron every once in a while just to be sure, but so far, no problems. A lot of small planes and helicopters run standard piston engines, so I don't know how their motors would resist the buildup that would have caused the damage on your friend's motor. Tolulene and Xylene are $10/gal in this area, unless you buy a 50 gal drum. I've been considering that, but it is kind of a hassle to get the drum to and from the house. HEAVY! Maybe I should look into a 25 gal drum or something. Jon
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I'm no metallurgist, but I had always heard the exact opposite. Aluminum is more brittle, so you need a thicker piece of it to withstand stress, but it is stiffer thickness for thickness than steel. The design of the control arms was basically the same, but one was stamped steel and one was cast aluminum, most of the 944's I worked on were stock, including these two, eliminating the possibility that bushings were the difference. The two types of control arms are interchangeable, so there is not a significant design difference other than what was necessary to change the material used in the arms. I forgot to make my comment on Mike's control arms past tense. The point is that I think his arms are probably way more rigid than the stock arms, and that the aluminum would be tough enough to work with that metal might be a better option. Jon
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Sounds like it's time to get a 2.8 bottom end and slap that E88(?) head on it. Jon
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I think that was gasoline in a honeydew. That was pretty stupid. When I was a kid, we had much better ideas, like soaking a Nerf football in gas and kicking it down the street. There was that one time when I kicked the fiery football directly into the bushes in front of my parents' house... Nothing is quite so scary to a 13 year old as the sound of junipers catching on fire in the front yard. Jon
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Juan, are you planning a cast aluminum suspension setup, or are you going to TIG everything together? I can tell you that there is a difference between steel and aluminum control arms. I've driven early 944's with steel control arms, then immediately driven later ones with the aluminum control arms. I even went to my boss and asked what was "wrong" with the earlier car, and he explained that it was all about the rigidity of the aluminum arms. Both cars were stock, and the aluminum armed car just felt much more rigid and was much quieter over bumps. I think you'd get the same rigidity out of the tubular arms that Mike makes, and aluminum might be tougher to work with. Jon
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I did that too. That works great, but I think he was worried about the O2 sensor. Jon
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I've been running one gallon to five gallons 92 octane to get about 96. Supposedly you can run up to 35% Tolulene before any problems with fuel lines, etc. Tolulene is 114 octane, and is used in the gas you buy at the pump (in much smaller doses). Xylene is 118 octane, and is usually the same price, FWIW. I've run probably 20 tanks through, and haven't seen any problems yet. Lately I've been running AV Gas, because it is CHEAP at 100 octane at $2.65. Not legal for street use, and it is a little less dense than the unleaded and tolulene or xylene mix. I was running the Tolulene and Xylene because I was tuning with an O2 sensor. When I was done, I took the sensor off. I never had a problem with it while running the mix. Jon
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Is is possible to build one of those here in the US? Can you get eccentric shafts and rotor housings to do that readily? You could probably still have the tri-rotor mounted behind the crossmember... Jon
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Maybe put some casters on it or something... That is a first floor table for sure. Jon
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15 " wheels users we need this rotor. Help
JMortensen replied to a topic in Brakes, Wheels, Suspension and Chassis
Wow, that's really surprising to me JohnC. I've been espousing the "don't run more wheel or brakes than you need" theory, but even I'd figure that you run into brake fade pretty quickly with 300 + hp on a road course with sticky tires and little 11" brakes. Am I wrong? Do you also have a massive ducting project completed in there too? Jon -
Coil over threaded sleeve question?
JMortensen replied to PETEW's topic in Brakes, Wheels, Suspension and Chassis
You could get the 8" sleeves. Don't think you can really make a mistake with the long sleeves... Jon -
spring rates for 71 240z
JMortensen replied to cobraz240z's topic in Brakes, Wheels, Suspension and Chassis
Aux is right. Probably somewhere in the high one hundreds for a tight street car. Double duty street/track puts you in the 200's. You've got track springs there, and you will need Konis or better to dampen them. There was a big discussion on this just recently. Do a search. Jon -
Tires at 300+ RWHP
JMortensen replied to majik16106's topic in Brakes, Wheels, Suspension and Chassis
Brad, That doesn't look like pick up from other people's tires. Looks like you're just shredding them. Time for wider tires, or maybe some weight in the rear when you race. Jon -
That was nice. I'm not much of a piano fan either, but that was really good. What bugs me about drugs are the people who think that they are SMARTER on drugs. I had one stoner neighbor who is barely literate tell me how he read Shakespeare stoned and "he really understood what it meant" but he couldn't understand what it meant sober. I asked him if he wanted to test that theory on some Shakespeare I had studied in school, and he declined. I think drugs trick you into thinking you know what you're doing. I had another friend who plays guitar, and he was convinced that he could play the entirety of "The Wind Cries Mary" by Jimi Hendrix until he sobered up and couldn't do it anymore. The best story though is a buddy of mine who used to freestyle BMX. He had to be stoned to learn this one manuever, which consisted of riding forwards in a slight turn, than spinning 180* and rolling backwards from there on the front tire only. It was pretty cool looking, and he was the only one who could do his drug found talent sober. He said that pot helped him feel his balance, and for some reason "click vision" helped too!!! Click vision while rolling backwards in a nose wheelie... FWIW, I think all drugs should be legalized, but if you end up in a ditch because of them, no one should be required to help you, and if you commit a crime to get drugs you should get serious jail time. Jon
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No more whinning about weak IRS's
JMortensen replied to Z-Dreamer's topic in Brakes, Wheels, Suspension and Chassis
I wonder if there is a decent posi for the Dana that comes in the Vettes. I seem to remember there only being one, a Dana tracklok (aka trashlock) which is weak at best in both strength and hookup. Tends to break spider gears, and has a very weak posi design. Maybe there are more available now... Jon -
Best plugwire/sparkplug upgrade?
JMortensen replied to hauserdaddy's topic in Ignition and Electrical
That URL does not have a listing for a 280ZX. That would be the same as the 240 set IIRC. You might want to try calling that company, or try another import parts dealer, NOPI or someone else online. They shouldn't be that hard to find. Maybe even pick up the yellow pages and look for an import parts house locally. Jon -
So Gramercyjam, what did you decide to do on your car? Jon
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Top-End Performance comments on company
JMortensen replied to Nismo280zEd's topic in 6 Cylinder Z Forums
Don't dispute it before you give him a chance to refund you! Obviously there is a problem with the parts. Ask him to call tag the parts, since he sent defective stuff he should pay to return it. If he doesn't want to call tag the shipment, consider sending it on your own dime, THEN consider disputing with the credit card. I have seen people who dispute everything they don't want, rather than returning or even calling the merchant. You've got a lot of power to screw him with the dispute, at least give him a chance to make it right. Oh, and there is a time limit on disputing charges. I think you have to dispute within 60 days or something like it. Check the back of your cc statement for the details. I've worked in many a mail order business, and that's my take on it, FWIW. Jon -
Looks like the other people on that forum set him straight. I did like the comment about his dancing banana though... Jon
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How do you think the 2 different Viper drivers felt when I beat them at autox in my '93 Toy P/U? Granted, it was autox, but it's still a fun story... You think that Viper is fast? Well, I've only raced two in my little 4 banger Toyota here, but I whipped 'em both! Jon