TECH TALK - ask your technical car questions
- SomeKindOfMonster
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The latest craze in Australia at the moment is twin supercharger setups, that feature a centrifugal supercharger sucking the air in and compressing it, then feeding the already copressed air in the intake of a whipple (or roots) blower mounted on top of the manifold, giving insane power. Correctly doing this can give the same effect as using a twin turbo setup, but wihout as much space loss (which is a good thing when used with a V8)
- darknight788
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That kind of boost is A LOT for anything but TopFuel Dragsters!darknight788 wrote:jeez that sounds crazy , about how much boost are those setups putting out. i know of some pickup trucks around here running twin-turbo setups and they put out around 60-70 psi which is alot for a truck
20 years ago in the Turbo era of Formula1 the best engines with quad-turbo boost had 4bar(less than 60psi) and reached 1200-1400HP@14000rpm from 1500cc engines...
- Grez~Supra_RZ-S
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- SomeKindOfMonster
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Only around 40psi. Without lowering the compression ratio too far, 40psi has seen some aussie street cars crack 1500rwhp!! To run 80psi on a SUV, the compression ratio would have to be around 7.5 to one, otherwise the heads would lift off the block. I'm still trying to find a picture of a twin super-charger setup, but here is a pic of australia's first 1700rwhp family car (pictures don't do it justice, as the turbo's are hidden away under the intercooler piping. The air/water intercooler that runs right through the car to a big tub in the trunk cost around $125000 alone, and is capable of keeping the operating temps around 90degrees celcius, even when under full boost.
- Grez~Supra_RZ-S
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Of course, saying ''to run x amount of PSI on an SUV'' is all well and good, except that all engines in the SUV range are different. They will all respond differently to different boost levels.
I know of a 450bhp SX that runs 37PSI. In all honesty, its not an unbelievable amount of boost. The lag is horrendous mind you.
I know of a 450bhp SX that runs 37PSI. In all honesty, its not an unbelievable amount of boost. The lag is horrendous mind you.
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- boganbusman
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- nismodriftster95
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- boganbusman
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Here's a howstuffworks article on turbos:
http://auto.howstuffworks.com/turbo.htm
and superchargers:
http://auto.howstuffworks.com/supercharger.htm
Those articles should give you a basic understanding. If you want, you can ask for more technical information in here after reading them.
There is also some discussion about turbos and superchargers on the previous page.
http://auto.howstuffworks.com/turbo.htm
and superchargers:
http://auto.howstuffworks.com/supercharger.htm
Those articles should give you a basic understanding. If you want, you can ask for more technical information in here after reading them.
There is also some discussion about turbos and superchargers on the previous page.
- SomeKindOfMonster
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The clubby runs piping from that intercooler to the boot, where there is a 120litre ice/water chest with 4 electric pumps in it. The hot air runs through piping under the body on the drivers side, and returns on the passenger side at abour a quarter of the temp. He managed to make 1800RWHP with the engine on fire when I was at summernats last year. As for running 37PSI in an SUV, that is definately believeable, but when you start talking about 60-70 PSI, the heads will lift, unless the compression ratio is insanely low, making it nearly impossible to drive until boost is reached.
- darknight788
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dont get me wrong these trucks are not your everyday this video shows the some of the trucks that run around here with TT setups making lots of boost, some even make 50 psi off of one turbo http://www.youtube.com/watch?v=W0WMKNK60Ck
- steelsnake00
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Direct Displacement Superchargers (AKA Twin Screw setups)
Does anyone know any UK builders of Twin Screw chargers? What kind of horsepower increase would you be looking at from ~9psi from a TS system on a ~360bhp engine?
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Isn't a Roots type blower a centrifugal supercharger anyway? Or did you mean feeding into a Twin Screw charger?
Does anyone know any UK builders of Twin Screw chargers? What kind of horsepower increase would you be looking at from ~9psi from a TS system on a ~360bhp engine?
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Isn't a Roots type blower a centrifugal supercharger anyway? Or did you mean feeding into a Twin Screw charger?
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- boganbusman
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- SomeKindOfMonster
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- Grez~Supra_RZ-S
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- boganbusman
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- SomeKindOfMonster
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- Grez~Supra_RZ-S
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- boganbusman
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- steelsnake00
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