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 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
17th Jun, 2010 at 06:50:46pm
since the last couple of dual boost threads recently i have been looking into it trying to figure out how the supercharger would change the compressor map requirements for the turbo
Yes i moved to the darkside |
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 509 Posts Member #: 1027 Post Whore Germini, black forrest |
17th Jun, 2010 at 07:42:16pm
[X] nail here for new monitor |
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14 Posts Member #: 7964 Member wakefield |
17th Jun, 2010 at 08:16:20pm
brett make your own.....http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280521805372&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en.....would look good with a nice turbo out of the back and not much exhaust :) |
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9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
17th Jun, 2010 at 08:24:00pm
haha thats local too Yes i moved to the darkside |
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14 Posts Member #: 7964 Member wakefield |
17th Jun, 2010 at 08:42:12pm
i no thought bout it myself :) |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
17th Jun, 2010 at 10:34:04pm
.. Edited by Sprocket on 17th Jun, 2010. 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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509 Posts Member #: 1027 Post Whore Germini, black forrest |
18th Jun, 2010 at 02:32:40pm
Uhmm - am I seeing thsi right? Does it have a second throttle which bypasses the supercharger when the turbo kicks in? [X] nail here for new monitor |
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9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
18th Jun, 2010 at 03:21:11pm
On 18th Jun, 2010 Asphalt said:
Uhmm - am I seeing thsi right? Does it have a second throttle which bypasses the supercharger when the turbo kicks in? yeah the big throttle body infront of the turbo bypasses the supercharger when the turbo takes over it then de clutches the supercharger, basicaly the supercharger gives it a huge kick up the arse "off boost" then when the turbo has boosted it takes over almost 600 porkies too, i love it, and im getting tempted :/ Yes i moved to the darkside |
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9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
18th Jun, 2010 at 03:34:02pm
this is from the standard (eu-dm) 1.4 vw
Yes i moved to the darkside |
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 8604 Posts Member #: 573 Formerly Axel Podland |
18th Jun, 2010 at 04:27:01pm
On 17th Jun, 2010 Brett said:
i have been looking into it trying to figure out how the supercharger would change the compressor map requirements for the turbo I had some trouble working this out when I was looking at the super-turbo route. Basically the pressure ratio is the outlet pressure divided by the inlet presure, both in absolute terms. Air volume flow is tricky as you have to adjust it to account for the density change. So if you have 2 bara at the compressor/blower inlet, then you have half the volume flow. But you have to account for the higher inlet temperature if it has already been compressed, so you need to apply a ratio of the actual inlet temperature divided by the compressor 'normal' inlet temperature, both in absolute terms. You need to decide if you are going to have an interstage intercooler. Easy peasy. Edited by Paul S on 18th Jun, 2010. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
18th Jun, 2010 at 06:15:26pm
its interesting once you start looking over the calculations, id love to try it but in reality i doubt it would be for couple years if at all
Edited by Brett on 18th Jun, 2010. Yes i moved to the darkside |
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8604 Posts Member #: 573 Formerly Axel Podland |
18th Jun, 2010 at 06:41:39pm
On 18th Jun, 2010 Brett said:
its interesting once you start looking over the calculations, id love to try it but in reality i doubt it would be for couple years if at all im thinking about [atmos]-[turbo]-[cooler]-[charger]-[cooler]-[inlet] there is alot of unknown efficiency thrown into the mix their i need to get my head around is it as simple as if the supercharger boost 1bar then the turbo puts 1bar into the charger the out put is 2bar?? [atmos]-[turbo]-[cooler]-[charger]-[cooler]-[inlet] makes the most sense with the interstage cooler making the charger more effective. The chargers, both turbo and super will work on ratios. So if you want 2 barg boost, then that could be done with each working on a 1.732:1 pressure ratio. I have a spreadsheet of the calcs for a 200hp 998 on 2 barg boost if you would like a copy. EDIT: got the ratio wrong. Edited by Paul S on 18th Jun, 2010. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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