Bill, I looked at your schematic and my question if you had simmed it was not a rethorical one. Perhaps you could post it again after having had a second look at it. From what I remember, it seemed incomplete and even with making some assumptions impossible to work. That might explain the somewhat lackluster response thus far.
As I said it has been simmed by someone far more well versed in the art than I. Why do you think it won't work? I'm just building it to see if it really does work. Note the OPA1632 is a differential in/out opamp which isn't clear from the SIM model as drawn.
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Oh I already have. I'm just seeing if a new concept could actually be considered here. Doesn't matter if it cant as I'm having fun, soldering stuff and learning about some obscure aspects of vinyl replay that have been forgotten over the last 50 years. All good clean fun 🙂
Not quite at the half century, but within a couple of percent 🙂. Life's no fun if you are sensible!
I like to think about designing engines (just the spec's and stuff, not necessarily parts). It's all about fun. What I don't much like doing is actually working on them. Maybe if I have an extremely nice shop where it was more pleasurable.
Jan, I love Morgans. They are on my short list for cars to get.
I don't think that most of us over 40 years old really likes working on cars. It is just too hard, and we don't have the nervous energy of our younger days. I haven't touched my Porsche 944, except for needed repairs and a better air cleaner, but I did work on a Porsche 924 about 25 years ago, where I did as many external mods as I could, and I read up on engine theory then. Later cars are too hard to change, and it destroys the smog requirements, in general. Rechipping a car might be a great mod, but I have never done it myself.
The worst part of working on a current automobile is the packaging, no thought is given anymore for actual serviceability. It is just impossible many times to get to a component to repair without taking many other things apart just to get access. The other problem for many is the electronics in a car, a very complex ladder logic system with many ways to get fooled by false diagnostic codes. I once in awhile take the car in if it simply isn't practical to fix something myself, something underneath that a lift makes all the difference between stupidly hard and easy. I haven't met a mechanic worth much when it comes to really troubleshooting electrical problems, they just keep changing components until the problem hopefully goes away. If they change all the sensors and the problem persist they just give up. I just don't do upholstery, but anything else I have done from repairs to repaints. Rebuilt and recharged the a/c last, that included a complete flush and vacuum along with charging the system, new compressor, accumulator, high and low pressure hose and orifice. I've been working on my own cars since I was 17, why stop now! I've even made and installed a horn loaded audio system in my 1967 Firebird with passive networks tri-amped with parametric eq. Cars can still be fun, my '67 is now finally exempt and I can finally install fuel injection without breaking the law, California car laws are crazy! They made you stay with a carburetor even when the fuel injection was better, the California Air Resource Board has been trying for years to stop people from working on their own cars. Look at any major hot rod part for an engine and the better stuff will have a CARB# on it making it legal.
California is like North Korea strict and full of **** on all sorts of laws - but if they got funding from China to exist.
I got a car with a supercharger, but to get the belt on or off you have to disconnect a motor mount... pretty stupid, and it does go bad. I would work on them more if it where not for stuff like that or the time I helped a friend replace the thermostat on his SAAB. I literally did it blind because on a FWD v6 turbo, you can't see it, there is no room for your head to even look at it.
Where as with electronics I can carefully solder something in my stereo without having to do anything more than turn off the power for a moment. And I don't have to wash myself several times over after. Maybe if it where not for all the petrol crap you get all over you I would be more willing to work on cars.
I got a car with a supercharger, but to get the belt on or off you have to disconnect a motor mount... pretty stupid, and it does go bad. I would work on them more if it where not for stuff like that or the time I helped a friend replace the thermostat on his SAAB. I literally did it blind because on a FWD v6 turbo, you can't see it, there is no room for your head to even look at it.
Where as with electronics I can carefully solder something in my stereo without having to do anything more than turn off the power for a moment. And I don't have to wash myself several times over after. Maybe if it where not for all the petrol crap you get all over you I would be more willing to work on cars.
KHM -- super cool that you have a '67 Firebird. 🙂 Time to get a 350+ HP small block chevy crate engine with fuel injection. (I just looked up the price, goodness gracious, never mind!)
Although a nice getrag 6 and a well sorted diff would do wonders for your car's handling. 🙂
Although a nice getrag 6 and a well sorted diff would do wonders for your car's handling. 🙂
If you want to spend $10-12K on a good crate engine go ahead. A slightly used motor out of a wreck is the way to go if you go that direction. I have a spare '69 Z'28 block and crank, 302, that should work real nice in that Firebird. Also already have a real strong five speed and dual disk clutch. What upsets many is when I do my magic and modify the body, been doing custom cars since my first job after high school. I figure a 325mm rear tire is close to what I had under my '69 Z'28, and 285mm up front, not going to fit in a stock body!
hotrodscustomstuff.com | 1968 Pontiac Firebird
This is close to what I will do but many details will be different like the hood, front nose, rear spoiler and other things. But the general coke bottle shape will be close to this. I already have full steel replacement panels ready to cut up for this. My 69 Z'28 Camaro that was stolen was a similar idea but much more radical with side running boards and full tilt front end, of course that car was carbon fiber bodied! I miss that car every day when I drive on Mulholland, that car was years in the making and built specifically to run the top of the mountain, illegally low at 4" of ground clearance with custom German Bilstein shocks and custom anti-sway bars and springs and of course Recarro seats. Nothing really left stock, a race car for the street with license plates that got 17mpg
hotrodscustomstuff.com | 1968 Pontiac Firebird
This is close to what I will do but many details will be different like the hood, front nose, rear spoiler and other things. But the general coke bottle shape will be close to this. I already have full steel replacement panels ready to cut up for this. My 69 Z'28 Camaro that was stolen was a similar idea but much more radical with side running boards and full tilt front end, of course that car was carbon fiber bodied! I miss that car every day when I drive on Mulholland, that car was years in the making and built specifically to run the top of the mountain, illegally low at 4" of ground clearance with custom German Bilstein shocks and custom anti-sway bars and springs and of course Recarro seats. Nothing really left stock, a race car for the street with license plates that got 17mpg
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Speaking of packaging, I really dislike Audis. Mostly transverse mounted engines so far forward it's ridiculous. Horrible for weight distribution. Another casualty to chassis that are shared across models that are front wheel drive. Plastic everywhere. My friend had an A4 with a water pump failure... the amount of work to get to it is insane.
Give me RWD or a true AWD setup (not Haldex FWD based "AWD" garbage). Yeah I know FWD has come a long way, but as Jeremy Clarkson once said, front wheel drive is for the feeble 😉.
As mentioned above, thanks to the VW scandal, lobbying, and CARB it will probably soon be illegal to "tamper" with your car's firmware. It's already taking heroic efforts to defeat the encryption to be able to modify anything on these cars (they hate warranty claims from increased boost). The most popular "tunes" and "chips" for the BMW turbo engines are actually piggyback devices with an FPGA and/or MCU inside that fake whatever signals they need to control boost targets, wastegate actuation, etc.
Give me RWD or a true AWD setup (not Haldex FWD based "AWD" garbage). Yeah I know FWD has come a long way, but as Jeremy Clarkson once said, front wheel drive is for the feeble 😉.
As mentioned above, thanks to the VW scandal, lobbying, and CARB it will probably soon be illegal to "tamper" with your car's firmware. It's already taking heroic efforts to defeat the encryption to be able to modify anything on these cars (they hate warranty claims from increased boost). The most popular "tunes" and "chips" for the BMW turbo engines are actually piggyback devices with an FPGA and/or MCU inside that fake whatever signals they need to control boost targets, wastegate actuation, etc.
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I went shopping for some wine... I was running low. This is my weeks worth bill.... probably should trim my guest list. Its getting out of hand:
😉
-RM
😉
-RM
The difference between cars and audio is that when you pay more for a car, you generally get more, and the difference is measurable if performance related.
When you pay more for audio electronics you're guaranteed nothing. Objective performance may be worse and subjective accounts of performance are more correlated to the price tag of the gear than anything else. It's more like a cult that wears its ignorance proudly as a badge of honor.
When you pay more for audio electronics you're guaranteed nothing. Objective performance may be worse and subjective accounts of performance are more correlated to the price tag of the gear than anything else. It's more like a cult that wears its ignorance proudly as a badge of honor.
That's properly nuts. And, yeah, a wrecker pull is the way to go, crate engines really don't make sense for the road.
Chris,
Whens the last time you tried to work on a BMW, change just the front headlight bulb and get back to me! Basically all new cars are built on a computer screen and every mm of space is accounted for, no more room around any engines anymore and then they add plastic covers on the engine besides. If only the engineers who were doing the designs had to go on the floor and try and service these cars I bet then things would change. Today remove and replace has mostly surpassed any real parts repairs.
Whens the last time you tried to work on a BMW, change just the front headlight bulb and get back to me! Basically all new cars are built on a computer screen and every mm of space is accounted for, no more room around any engines anymore and then they add plastic covers on the engine besides. If only the engineers who were doing the designs had to go on the floor and try and service these cars I bet then things would change. Today remove and replace has mostly surpassed any real parts repairs.
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