jenkies Posted January 12, 2008 Share Posted January 12, 2008 zu tu tu tu tu tu= owwie mummy i have a boo boo! i prefer pfzuooo ma R seems to like making that noise Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578158 Share on other sites More sharing options...
mr. kirisaki Posted January 12, 2008 Share Posted January 12, 2008 LOL. So does have an atmos bov cause this sometimes? Or only when its on high boost? I've heard a GTR speed by with the classic SSQV whistle accompanied by flutter... Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578169 Share on other sites More sharing options...
Adriano Posted January 12, 2008 Share Posted January 12, 2008 Thats because SSQV's are rubbish, tiny little ports, so they dont vent all the air Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578172 Share on other sites More sharing options...
Nick033 Posted January 12, 2008 Share Posted January 12, 2008 in b4 tha lock yo Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578194 Share on other sites More sharing options...
jenkies Posted January 12, 2008 Share Posted January 12, 2008 does anyone have pics of the standard plumbback r32 GTR bov bov's ??? in the four months ive had my baby never been game to pull er apart that much! cheers jenkies Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578223 Share on other sites More sharing options...
R34NRG Posted January 12, 2008 Share Posted January 12, 2008 everything to do with doseing is a myth......everything that says its bad for the turbo is all theoretical. theres no actual proof that doseing (exsessive compressor surge) will shortn ur turbo life, i know many vls dosing day in day out at 18+psi and still survive longer then many skylines. bring on the flaming but i think dosing sounds awsome.....not the dolphin dosing though. this kind. ignore the title cuz americans dont know f*kn shit. they think any sound from the engine comes from a HKS SSQ LOL Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578226 Share on other sites More sharing options...
jenkies Posted January 12, 2008 Share Posted January 12, 2008 everything to do with doseing is a myth......everything that says its bad for the turbo is all theoretical. theres no actual proof that doseing (exsessive compressor surge) will shortn ur turbo life, i know many vls dosing day in day out at 18+psi and still survive longer then many skylines.bring on the flaming but i think dosing sounds awsome.....not the dolphin dosing though. this kind. ignore the title cuz americans dont know f*kn shit. they think any sound from the engine comes from a HKS SSQ LOL its damn physics dude u spin something 100,000 rpm one way then reverse it in a second when its on bushings or bearings...... DUH its gonna do damage! Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578239 Share on other sites More sharing options...
Simon-S14 Posted January 12, 2008 Share Posted January 12, 2008 show us the proof then. i have had many many engines over the years (non have blown up... i just have had a lot of cars) out of them only 1 had a BOV (my rb20) i do a lot of competition drift, and as yet have NEVER HAD A TURBO FAILURE from running no bov. I find that no bov makes for a much more responsive set up then having a bov. the maths/physics says it bad, but wheres ther hard proof?? Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578286 Share on other sites More sharing options...
skylinekid Posted January 12, 2008 Author Share Posted January 12, 2008 show us the proof then. i have had many many engines over the years (non have blown up... i just have had a lot of cars) out of them only 1 had a BOV (my rb20) i do a lot of competition drift, and as yet have NEVER HAD A TURBO FAILURE from running no bov. I find that no bov makes for a much more responsive set up then having a bov. the maths/physics says it bad, but wheres ther hard proof?? i have a turbonetics turbo i have not had a blow off valve working and i was running 14p the bearings r noisy and the turbo has heaps of shaft play ive had it on the car for 20000kms i see this as proof for me Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578289 Share on other sites More sharing options...
jenkies Posted January 12, 2008 Share Posted January 12, 2008 i have a turbonetics turbo i have not had a blow off valve working and i was running 14p the bearings r noisy and the turbo has heaps of shaft play ive had it on the car for 20000kms i see this as proof for me many thanks and a very big thumbs up! i have no hard proofe i just have common sence that all things wear eventually and turbos are one of those things... the principals behind a plumb back blow of valve help to keep forward momentum of the turbo and vent air to the intake to await throttle and spool up..... no bov means backwards momentum (backspin) creating that dv tu tu tu tu noise because the air has on where else to go which means it would create more lag for the turbo to create forward momentum again. this is my thoughts of common sence and theory anyway. tell me otherwise. Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578301 Share on other sites More sharing options...
rev210 Posted January 12, 2008 Share Posted January 12, 2008 You are loading up the trust bearings on the turbo plenty. If other things fail before the turbo does that doesn't mean you aren't wearing it out faster or that there isn't instances of catestrophic failures in short periods. Turbo's that cop the abuse are doing so because they make them pretty well these days, not because there's no harm. It's safe to assume turbo manufacturers know what they are talking about and we mere mortals don't. From a Turbo Manufacturer (Garrett) website, one of a few refferences made on that site about the strain not having one introduces; Blow-Off (Bypass) Valves The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo’s compressor from going into surge. The BOV should be installed between the compressor discharge and the throttle body, preferably downstream of the charge air cooler (if equipped). When the throttle is closed rapidly, the airflow is quickly reduced, causing flow instability and pressure fluctuations. These rapidly cycling pressure fluctuations are the audible evidence of surge. Surge can eventually lead to thrust bearing failure due to the high loads associated with it. Blow-Off valves use a combination of manifold pressure signal and spring force to detect when the throttle is closed. When the throttle is closed rapidly, the BOV vents boost in the intake tract to atmosphere to relieve the pressure; helping to eliminate the phenomenon of surge. Here's an interesting one about compressor surge in general; Surge is most commonly experienced when one of two situations exist. The first and most damaging is surge under load. It can be an indication that your compressor is too large. Surge is also commonly experienced when the throttle is quickly closed after boosting. This occurs because mass flow is drastically reduced as the throttle is closed, but the turbo is still spinning and generating boost. This immediately drives the operating point to the far left of the compressor map, right into surge. Surge will decay once the turbo speed finally slows enough to reduce the boost and move the operating point back into the stable region. This situation is commonly addressed by using a Blow-Off Valves (BOV) or bypass valve. A BOV functions to vent intake pressure to atmosphere so that the mass flow ramps down smoothly, keeping the compressor out of surge. In the case of a recirculating bypass valve, the airflow is recirculated back to the compressor inlet. Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578348 Share on other sites More sharing options...
geraus Posted January 12, 2008 Share Posted January 12, 2008 Well i gota HKS SSQV and i feel lag... on my r33 but when i put my stock one back on... it feels no lag... but i leave my HKS on sounds mad. Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578354 Share on other sites More sharing options...
rb26s13 Posted January 12, 2008 Share Posted January 12, 2008 that actually sounds like a greddy type R Bov to me too??? Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578359 Share on other sites More sharing options...
jenkies Posted January 12, 2008 Share Posted January 12, 2008 :laughing-smiley-014: Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578360 Share on other sites More sharing options...
nzm033 Posted January 12, 2008 Share Posted January 12, 2008 whos turbo has actually blown from dose/flutter? i know someone that has been driving extremely hard with no bov for 5yrs and clocked over 210000km's and the turbo is fine Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578379 Share on other sites More sharing options...
R31Nismoid Posted January 12, 2008 Share Posted January 12, 2008 gawd... i go out for a extensive number of beers... and a BOV thread appears SEARCH!!!!! closed! Link to comment https://www.sau.com.au/forums/topic/201242-turbo-dose/page/2/#findComment-3578383 Share on other sites More sharing options...
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