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TURBO gurus help =D

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Old Aug 14, 2007 | 06:23 PM
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Default TURBO gurus help =D

Sorry this has nothing to do with a corvette, but i could always use some help from my corvette fellows with this frustrating debate going on at youtube:

http://www.youtube.com/watch?v=v55UtXvSUZ0#HGOHNRud2iU

what is the sound thats generated when he lifts off the throttle??? Compressor surge, or wastegate opening?

Thanks alot, I hope we get over this myth and onto the truth.

Moe.
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Old Aug 14, 2007 | 08:07 PM
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thats the blow off valve
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Old Aug 15, 2007 | 12:10 AM
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Watched quite a few videos on the Patrol. Those things are unbelievable! Are those things available in the states? Talk about a total sleeper That would be great to ride around town(and off the beaten tracks around town!)

John
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Old Aug 15, 2007 | 12:56 PM
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they dont sell them in the states, I guess they dont pass some of the strict emissions or safety regulations imposed.

But back here, its the king of the road, and beleive me those things FLYY, and we have seen few mess around with SLRs at 200MPH +++, yes above 200 Mph lol

Ive personally raced with one, and thank god he wasnt faster than me, he was next to me the whole time, what a scary scene!!
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Old Aug 15, 2007 | 09:52 PM
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Are they Turbo Diesel? Must be pretty strange seeing a suv going up against some of the big boys.
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Old Aug 16, 2007 | 12:46 AM
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Originally Posted by Tiago
thats the blow off valve
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Old Aug 16, 2007 | 06:44 PM
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Originally Posted by pennys58
Are they Turbo Diesel? Must be pretty strange seeing a suv going up against some of the big boys.
nope its an RB48 4.8liter Turbocharged Inline 6, and they run boost up to 2.7 bar in some instances, which is 40 PSI!!!
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Old Aug 16, 2007 | 06:45 PM
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Originally Posted by Brabus2
the car does not have a blow off valve
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Old Aug 16, 2007 | 09:19 PM
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thats the waste gate, and the turbo on that car is an HKS T51 SPL BB with the HKS GT60 waste gate, my old land crusier had the same setup. the engine in the nissans is is infact the TB48 not the RB48, RB engines start from RB20 up to RB31 and they are limited to skylines only.

Last edited by UAE; Aug 16, 2007 at 09:27 PM.
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Old Aug 17, 2007 | 09:42 AM
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Originally Posted by ayousef
the car does not have a blow off valve
somebody installed one in that perticular one

thats no wastegate....
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Old Aug 17, 2007 | 10:17 AM
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Originally Posted by Tiago
somebody installed one in that perticular one

thats no wastegate....
it belongs to a friend of mine, and it is a wastegate, infact its the HKS GT waste gate, and it dosnt have a blow of valve, and there isnt a blow valve that sounds like a wast gate, go to youtube and search for T51R SPL BB supras and you will know what am i talking about my friend.
this is the same setup on a supra belonging to a friend of mine in Qatar:http://youtube.com/watch?v=jmFUY8gbFcU

Last edited by UAE; Aug 17, 2007 at 10:20 AM.
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Old Aug 17, 2007 | 08:36 PM
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Originally Posted by UAE
it belongs to a friend of mine, and it is a wastegate, infact its the HKS GT waste gate, and it dosnt have a blow of valve, and there isnt a blow valve that sounds like a wast gate, go to youtube and search for T51R SPL BB supras and you will know what am i talking about my friend.
this is the same setup on a supra belonging to a friend of mine in Qatar:http://youtube.com/watch?v=jmFUY8gbFcU
yes it is a T51R indeed, and sorry about that RB, TB confusion, im not japanease cars fan, but I could tell you that this is no wastegate sound, infact its compressor surge, i have a few friends who own T51R turbo-ed patrols which sound exactly the same, and due to the noticable surge the car looses ALOT of speed during shifts given the turbo has to re-spool up and gain speed.

I dont know why wouldn't those high boost motors use blow-off-valves, which im sure will help maintain the turbines momentum during shifts and presicely when you lift off the throttle and cause a air-flow dead end.

I am by no chance starting a fight over here, but I never knew waste-gates "chatter" and it is widely stated that many folks think this is the wastegate's sound.

I would appreciate it, if member "APS" kicks in on this one
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Old Aug 18, 2007 | 12:39 AM
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Compressor surge. Wastegate would only be open when it's controlling boost, not when the throttle is lifted.
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Old Aug 18, 2007 | 03:04 PM
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Originally Posted by INTMD8
Compressor surge. Wastegate would only be open when it's controlling boost, not when the throttle is lifted.
this is the right answer, and for those who disagree, tell me why do centrifugals chatter as turbos do if its coming from the wastegate
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