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 8604 Posts Member #: 573 Formerly Axel Podland |
6th Apr, 2011 at 06:56:47pm
A good read:
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
6th Apr, 2011 at 07:31:55pm
Interesting,
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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8604 Posts Member #: 573 Formerly Axel Podland |
6th Apr, 2011 at 08:19:55pm
My simulations for the 1293 at 1.4 bar boost show 31kW at 186,000rpm on the GT2056 turbo shaft ! Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
6th Apr, 2011 at 08:42:56pm
that sounds a lot, On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 6752 Posts Member #: 828 Post Whore uranus |
7th Apr, 2011 at 08:21:20am
http://en.wikipedia.org/wiki/Heat_capacity_ratio Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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8604 Posts Member #: 573 Formerly Axel Podland |
7th Apr, 2011 at 03:27:17pm
On 6th Apr, 2011 Joe C said:
that sounds a lot, It is, but the calcs work out right. It's right on the edge of the compressor map at nearly 30 lb/min and less than 60% efficiency. Might need a bigger turbo 
EDIT: Just realised that it takes the power of an NA 998 to drive that compressor 
Edited by Paul S on 7th Apr, 2011. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
7th Apr, 2011 at 10:38:10pm
the scary bit is that the turbine needs to extract that 31kw (40 hp) from the exhaust gas... at about 65% efficiency, so thats 60 od hp being extracted from exhaust heat and pressure, On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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8604 Posts Member #: 573 Formerly Axel Podland |
8th Apr, 2011 at 10:41:03am
The average pressure upstream of the turbine is over 4.0 bar ! It peaks around 6.0 bar. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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6752 Posts Member #: 828 Post Whore uranus |
8th Apr, 2011 at 01:25:54pm
On 8th Apr, 2011 Paul S said:
The average pressure upstream of the turbine is over 4.0 bar ! It peaks around 6.0 bar.
Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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8604 Posts Member #: 573 Formerly Axel Podland |
8th Apr, 2011 at 01:42:12pm
But it is still possible to get the exhaust pressure at valve overlap below inlet pressure for a good VE :)
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
8th Apr, 2011 at 01:48:19pm
hopfully not on mine...
On 8th Apr, 2011 Paul S said:
The average pressure upstream of the turbine is over 4.0 bar ! It peaks around 6.0 bar. On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
8th Apr, 2011 at 02:02:41pm
On 7th Apr, 2011 Joe C said:
the scary bit is that the turbine needs to extract that 31kw (40 hp) from the exhaust gas... at about 65% efficiency, so thats 60 od hp being extracted from exhaust heat and pressure, With the Otto cycle being only 20% efficient, that means on a 200 hp boosted engine, there is 800hp being wasted. using 100hp of that wasted power can only be a good thing? The main point I would think is the heat added to the charge air when talking about inefficiencies. Its like modern CHP systems. A gas powered generator burns gas through a large reciprocating engine to produce electricity. The engine dumps its heat into the cooling system and exhaust, normally dumped into the air as 'waste' heat. This waste heat is captured from the cooling system and exhaust gasses, used to heat the building, and, drive an absorption water chiller for air conditioning. The total 'waste' heat is ultimately still dumped into the air through escape from the building or the heat rejection of the water chiller, but you have made use of it before you do. I must admit, I never really thought about it like that, putting a hp value on it, and is quite interesting. On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
8th Apr, 2011 at 05:59:04pm
Ah, the recovery of wasted energy is obviously great, but what percentage of the energy being used by the tyrbine is wasted, and what is incured by restriction?
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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8604 Posts Member #: 573 Formerly Axel Podland |
8th Apr, 2011 at 06:38:17pm
On 8th Apr, 2011 Joe C said:
Ah, the recovery of wasted energy is obviously great, but what percentage of the energy being used by the tyrbine is wasted, and what is incured by restriction? Isentopic expansion would be ideal i.e. 100% turbine efficiency. You would then have a lower inlet pressure, a lower outlet temperature and a higher VE = more power. Not sure that anything is "wasted" as such, just not made the most off. Restriction wise, well, get your manifolds right and you can get higher VE than a highley tuned NA engine, in my opinion. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
8th Apr, 2011 at 06:53:23pm
Sorry,
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
10th Apr, 2011 at 08:37:40pm
if the energy going up the exhaust to atmosphere is not waste, what is it? On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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8604 Posts Member #: 573 Formerly Axel Podland |
11th Apr, 2011 at 05:29:39pm
A fart is wasted energy, but I'm not sure you can do anything with it without causing back pressure and a reduction in maximum output :) Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
11th Apr, 2011 at 06:18:17pm
Hmmm. OK then On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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