BillyMako Posted November 6, 2008 Share Posted November 6, 2008 If an RB26 is running 12psi, is it both turbo running this boost or both running 6psi to make 12psi??? Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/ Share on other sites More sharing options...
marky Posted November 6, 2008 Share Posted November 6, 2008 If an RB26 is running 12psi, is it both turbo running this boost or both running 6psi to make 12psi??? both will be making 12psi Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4245907 Share on other sites More sharing options...
and3_3 Posted November 6, 2008 Share Posted November 6, 2008 As far as i know both the turbos will be pressurizing to 12 psi but the engine wont be receiving 24 psi somehow I THINK. Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246008 Share on other sites More sharing options...
thrtytwo Posted November 6, 2008 Share Posted November 6, 2008 of course it doesn't receive 24PSI Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246041 Share on other sites More sharing options...
and3_3 Posted November 6, 2008 Share Posted November 6, 2008 So how does it work then? How can two turbos that make the same boost but don't increase the total boost volume and still make more power?? Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246046 Share on other sites More sharing options...
thrtytwo Posted November 6, 2008 Share Posted November 6, 2008 cos think bout it, the PSI will only increase as the air is compressed further, when the air leaves the turbo into the the intercooler and on the way to the intake plenum it stays at the same compression level it already is, just theres more of it trying to get in, the air from another turbo cant compress the air from the first turbo if its at the same PSI. If however one turbo was running 10 psi and one was running 20psi i think, not sure though, you would end up with a total of 15Psi in the motor ?? edit: just thinking as well pressure is relative, 15 psi in a 10lt container is a lot less air than 15 psi in a 20 lt container. so the turbo isn't sending out a static '12 psi' its pushing air until the pipes its filling reach 12psi, both turbos know when that pressure is reached and stop, i guess 2 turbos work half as hard as 1 on its own ? to answer the first question that doesnt mean theyre both pushing six, cos theyre both a part in the same system, the psi in that system is always the same for both turbos. the way your thinking about it basically is that both turbo's are sealed off, reach 12 psi in a certain volume. and then both release they're pressurised air into a container the same size as each of the individual originals, but even then it wouldnt create 24 psi cos unless u have 24psi behind it it wont squeeze in Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246055 Share on other sites More sharing options...
and3_3 Posted November 6, 2008 Share Posted November 6, 2008 So it doesnt put more air in just puts the same air in faster? Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246059 Share on other sites More sharing options...
thrtytwo Posted November 6, 2008 Share Posted November 6, 2008 So it doesnt put more air in just puts the same air in faster? technically i think so, if there both putting out the same amount of air as one, into the same size pipes as 1, at the same rate, it should spool up the same amount of air as 1 turbo in half the time, but theres probably some efficiency loss to the effect of maybe taking 60% of the time of 1 turbo instead of 50%, i dont really know lol, too late to wrap my head around this Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246064 Share on other sites More sharing options...
marky Posted November 6, 2008 Share Posted November 6, 2008 Think of it in terms of volume of air rather than pressure. eg. Two turbos running at 12psi will supply twice the volume of air as one turbo running at 12 psi. Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246106 Share on other sites More sharing options...
tacker Posted November 6, 2008 Share Posted November 6, 2008 This basically turbo shuffle one compressor moving more air then the other. If one was to make 15psi and the other 10. The turbo producing 15psi would push the 10 psi back through the turbo it came from. Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246110 Share on other sites More sharing options...
Sklyn Posted November 6, 2008 Share Posted November 6, 2008 Where exactly is the PSI measured at? Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246117 Share on other sites More sharing options...
Bumblebee Posted November 6, 2008 Share Posted November 6, 2008 plenum... and yes 2 turbos @ 12psi push twice the volume of air as 1 turbo pushin 12psi. u dont add extra psi just because of another turbo. u could have 5 turbos running 12psi... still gonna be 12psi but with a shit load of air The turbos still work just as hard as a single turbo because its still spinning @ whatever rpm it needs to make 12psi. pretty simple stuff really Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246358 Share on other sites More sharing options...
paulr33 Posted November 7, 2008 Share Posted November 7, 2008 why? why does two turbos @ 12psi = more power than 1 turbo at 12psi? pressure != volume why is map sensor flawed pressure != volume why is afm better? pressure != volume why does a GT30 make heaps more power at 12psi than a standard turbo? pressure != volume bwhahahahaha Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246796 Share on other sites More sharing options...
bubba Posted November 7, 2008 Share Posted November 7, 2008 why?why does two turbos @ 12psi = more power than 1 turbo at 12psi? pressure != volume why is map sensor flawed pressure != volume why is afm better? pressure != volume why does a GT30 make heaps more power at 12psi than a standard turbo? pressure != volume bwhahahahaha lol nice work Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4246813 Share on other sites More sharing options...
BillyMako Posted November 7, 2008 Author Share Posted November 7, 2008 So 2 turbo putting out 12psi are pushing twice the amount of air into the engine than one! Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4247007 Share on other sites More sharing options...
WRRR Posted November 7, 2008 Share Posted November 7, 2008 (edited) So 2 turbo putting out 12psi are pushing twice the amount of air into the engine than one! No! Two turbos pushing the required engine air volume at 12 psi will be the same as a single pushing the same required engine air volume at 12 psi - Temperature being equal and assuming the turbochargers have the capacity to deliver the load. (P1*V1)T1 = (P2*V2)/T2 P = Pressure V = Volume T = Temperature Edited November 7, 2008 by WRRR Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4247074 Share on other sites More sharing options...
(OO)SKYLINE(OO) Posted November 7, 2008 Share Posted November 7, 2008 If an RB26 is running 12psi, is it both turbo running this boost or both running 6psi to make 12psi??? So how does it work then? How can two turbos that make the same boost but don't increase the total boost volume and still make more power?? Good questions! I too have been wondering about this. Interesting answers too. Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4247292 Share on other sites More sharing options...
Bumblebee Posted November 7, 2008 Share Posted November 7, 2008 pressure does NOT = volume pressure is pressure volume is volume. and WRRR is wrong. yes 2 turbos pushin 12psi is pushin twice the VOLUME of air. Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4247373 Share on other sites More sharing options...
Bakes Posted November 7, 2008 Share Posted November 7, 2008 It just works and it works good. There, thats my technical answer to the question Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4247509 Share on other sites More sharing options...
noakespg Posted November 7, 2008 Share Posted November 7, 2008 (edited) Im no expert on the matter, but from my way of thinking, the PSI is built up by forcing more air into the cylinder as a turbo works more like a 'pump' than a compressor. The more air (ie volume of air) you bump into the cylinder the more pressure builds up. When this pressure builds up to 12 psi the wastegate opens. Therefore does that mean that 12 psi from 2 turbos just means that each is generating 6psi. The benefit therefore is quicker build up of boost at lower revs and less strain on each turbo charger. I thought that PSI is a result of a higher volume of air forced into each cylinder. Like I said, no expert on the matter. I just want to understand how it works Edited November 7, 2008 by noakespg Link to comment https://www.sau.com.au/forums/topic/243658-how-gtr-turbos-work/#findComment-4248113 Share on other sites More sharing options...
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