powercharged rotary
07-06-04, 10:51 PM
#26
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with turbocharging (and thus, intercooling) you lower the charge temperature, which lowers the tendency for pre ignition knock, deadly to rotaries. you can prevent this by fattening up the a/f, but there's other problems associated with that.
07-06-04, 10:57 PM
#28
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Originally posted by jimmyjoejoe
hahaha... and who's the genius who gave it that technical name? let's say for semantics, a turbocharger uses exhaust pressure to spool boost, and a supercharger uses crank rotation to spool boost.
a turbo-supercharger could be argued to be a centrifugal supercharger, but no pissing contests over something so dumb, please
hahaha... and who's the genius who gave it that technical name? let's say for semantics, a turbocharger uses exhaust pressure to spool boost, and a supercharger uses crank rotation to spool boost.
a turbo-supercharger could be argued to be a centrifugal supercharger, but no pissing contests over something so dumb, please
07-06-04, 11:05 PM
#29
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and today's episode of sesame street is brought to you by the letter m, and FORCED INDUCTION.
i've never heard of chemical supercharging... hmm... i learn something new every day.
let's call it forced induction for you semantics ho's
i've never heard of chemical supercharging... hmm...
i learn something new every day.let's call it forced induction for you semantics ho's
07-06-04, 11:30 PM
#31
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just don't gimme any crap about releasing nitrous oxide into the combustion chamber increasing the the pressure, because i will find a way to explain that one too.
07-07-04, 12:42 AM
#32
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wow, power charging, thats incredible, seems to me you'd have alot of problems with say boost pushing back through the turbo or something, because obviously the roots type blower is going to push alot more air. There must be some serious valves controlling that ****...very cool though, i want to know more
07-07-04, 12:53 AM
#34
RX7 F0RUM > reallife™
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Originally posted by ZoomZoom
powercharging is both a supercharger on a belt and a exhaust driven turbo on the same motor at the same time. it supposed to make the most power all over the RPMS range.
powercharging is both a supercharger on a belt and a exhaust driven turbo on the same motor at the same time. it supposed to make the most power all over the RPMS range.
07-07-04, 02:41 AM
#38
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from http://www.nissanperformancemag.com/august03/ask_sarah/
I want to know why you cannot combine a turbo charger with a supercharger? Has it ever been tried before to your knowledge? Robert Lawndale, CA.
Known as twinchargers, the Lancia rally cars employed both a turbo and a supercharger. HKS even offered an upgrade for the Toyota MR2 with a supercharger-into-turbo kit. Nissan introduced a twincharged car, the front wheel drive March. The March (Nissan Micra in Europe) was originally offered in 1982 and is still around today in Japan and Europe, where there is also a Nismo version with intake, exhaust, suspension, and Rays rims (they get all the tasty cars). A turbo model was introduced in 1985, but the twincharged version was available from 1989-1992 and only sold in Japan and Malaysia. The March Super Turbo version had an inline 4 electronically fuel-injected 930cc single overhead cam turbo and supercharged engine, the MA09ERT. Only 110 hp at stock 0.7 bars of boost (about 10.3 psi), it was still practical to almost double the boost to get an extra 20-30 hp. At only 1700 pounds, the Super Turbo was capable of 0-60 in only 7.5 seconds. Is twincharging possible? Yes. Likely to see on a production car or cost effective? Not usually. It's hard enough trying to fit one forced induction system in an engine bay that trying to get two in a car already on the market would probably take some Crisco, a sledge hammer, and some funky body work. You can produce a kit where the turbo output powers the supercharger or vice versa. Powering a supercharger into a turbo takes advantage of low end spool since the supercharger is powered off the crank and doesn't have as much lag as larger turbos typically do. The supercharger blows air facing the turbo. However at high rpm, the turbo will be flowing too much air and there is a lot of backpressure, creating a vacuum. You would either have to disengage the supercharger as the turbo spooled up or add an outside source of air to power the turbo. Roots blowers, although not too efficient at high rpm, are cheaper and work well at low rpm, making it a most cost effective option. A variable speed centrifugal supercharger is a slightly pricier option as well. Use a higher boost setting in the low end and a low boost setting on the top end to let the turbo take over. Powering a turbo into a supercharger fools the turbo into thinking the engine is a greater displacement, but power is consumed by the spooled up supercharger and SC's are usually less efficient compressors than turbos. One easier option (both mechanically and on your wallet) is to use nitrous oxide to power a large, laggy turbo in the bottom end.
07-07-04, 02:44 AM
#39
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there was an integra in an old superstreet magazine with a converted twincharger system on it... i believe it was the meguiars car. anyways, what it was is, when you'd stomp on the gas, the supercharger makes instant boost, while diverting all of the exhaust to the turbo spools up the turbo. when the turbo started making more boost, the supercharger's pulley opened up, allowing the turbocharger to boost the motor. instant boost, and a nice turbo torque curve after a minute.
07-07-04, 02:47 AM
#40
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that, and rally cars use something called the bang bang system... what it did was when the driver let off the gas, it kept the injectors flowing lots of gas, but retarted the timing electronically about 50 degrees, causing a spark once the fuel was leaving the combustion chambers into the turbo. that way, under closed throttle, the turbo was still spooled and boosting. the problem is, in anything but a $300K rally car, turbos and exhausts aren't built to take that kind of heat.
07-07-04, 02:48 AM
#41
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when the drivers let off the gas, they make a BANG BANG and throw flames. people think that's a big deal, but they haven't driven a mazda lately.
07-07-04, 08:41 AM
#44
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jimmyjoejoe; that bang bang is called ALS. an anti-lag system. it's great but will destroy components quickley. and earlier someone stated nitrous being called chemical - supercharging? i would like to read about that. i don't see how it could be related at all. its not forcing any induction. ???? i'm really fat tho.
07-07-04, 09:38 AM
#45
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Google is your friend:
Nitrous boosts horsepower dramatically due to its extra oxygen content which serves as a form of chemical supercharging as a lot more oxygen makes its way to the combustion chamber, which in turn provides for a bigger bang. In rough terms the normal air we breathe contains about 20% oxygen while Nitrous has around 36% oxygen which of course makes for a much bigger bang.
Nitrous boosts horsepower dramatically due to its extra oxygen content which serves as a form of chemical supercharging as a lot more oxygen makes its way to the combustion chamber, which in turn provides for a bigger bang. In rough terms the normal air we breathe contains about 20% oxygen while Nitrous has around 36% oxygen which of course makes for a much bigger bang.
07-07-04, 11:21 AM
#47
Burning Oil-Grinding 3rd
Re: Heres one for ya
Originally posted by CODE BLUE
here's what one looks like in a 1st gen. My new mod ...hehe. Just went EFI with a mircotec computer and a 7inch camden supercharger
see more on my cardomain page 8....
here's what one looks like in a 1st gen. My new mod ...hehe. Just went EFI with a mircotec computer and a 7inch camden supercharger
see more on my cardomain page 8....
Dang. Looking good. What did you do to the ignition? That is 4 coils correct?
07-08-04, 10:04 AM
#49
love the braaaap
Its all about personal preference when it comes to using either a supercharger or a turbocharger. I believe both are equally matched, and I would probably use either one.
A supercharger refers to any BELT driven device used to force more air into an engine. A turbocharger refers to any device that uses exhaust gasses to force more air into an engine.
Oh, and BTW, you can intercool a roots type supercharger. Its called an air-to-water type intecooler and uses cooled water to cool the air. Its like a FMIC that has water circulated through it and is sandwiched between the intake manifold and supercharger.
A supercharger refers to any BELT driven device used to force more air into an engine. A turbocharger refers to any device that uses exhaust gasses to force more air into an engine.
Oh, and BTW, you can intercool a roots type supercharger. Its called an air-to-water type intecooler and uses cooled water to cool the air. Its like a FMIC that has water circulated through it and is sandwiched between the intake manifold and supercharger.
