donkey Posted November 6, 2008 Share Posted November 6, 2008 ok help where do i start, R33GTR had; power FC, pods, exhaust, camgears....great fun, loose traction a bit, nice low down power wanted more power, now im running; big 115 FMIC, LINK G4 no AFM's, 770, profect b, custom dumps, nismo pump, and one of the most talked about subject 2860-5's, everything new. 320awkw, tuned for torque, 7200 RPM limit, 18lbs. got the car back and really miss my low down power. i realise these turbos a more for mid-upper top end power now, but i didnt think they would be this laggy, i think now i should have gone for the -7's? dam questions; turbos are making the 'cho cho noise' the whole time, not on deaceleration, or holding throttle, like my old ones(standard) did, but now when accelerating, sounds like they are fighting each other, irratating. engine light on, on full boost ticking noise from turbos when boost starts to come on (internal wastegates?) i know these turbos are for around 350-400AWKW, but i dont want to crank the boost, destroy the engine but the car feels so lifeless, will uping boost give me a lil more low down power? or go to the -7's? good news which i will post in gearbox seaction, HKS twin plate, light weight flywheel, real easy to use, no stalling easy as! when i started these mods about 1 year ago didnt know anything about modding these cars, so went on my mechanics advice, so please no lectures my mechanic is 550km away so any help would be great on the noises cheers Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/ Share on other sites More sharing options...
Johnny Posted November 6, 2008 Share Posted November 6, 2008 Thats really strange; I would have said your clutch was slipping but having read you got a twin plate..... sounds like the engine isnt using the boost so the intake system is pressurising like if you were closing the throttlebody. Might indicate a blockage; maybe oil in the intercooler, badly dialed in intake cam gear?? Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4246196 Share on other sites More sharing options...
Bumblebee Posted November 6, 2008 Share Posted November 6, 2008 (edited) when twins start going larger they tend to surge on each other on partial throttle openings... didnt think the -5's would do it though... Edited November 6, 2008 by Bumblebee Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4246343 Share on other sites More sharing options...
CSNet Posted November 6, 2008 Share Posted November 6, 2008 Turbo Shuffle... never heard of the 5's doing it TBH. Engine light with FC is the knock levels yeah? A good tuner should be able to minimize shuffle etc... Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4246364 Share on other sites More sharing options...
PM-R33 Posted November 7, 2008 Share Posted November 7, 2008 engine light on, on full boost Get that checked ASAP unless you want an engine rebuild soon. Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4246501 Share on other sites More sharing options...
PHA71L Posted November 7, 2008 Share Posted November 7, 2008 that means its pinging.... you are hitting a unsafe knock level on the power fc thats why the engine light is on get it tuned asap!!!!! Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4246549 Share on other sites More sharing options...
Johnny Posted November 7, 2008 Share Posted November 7, 2008 Whats the default setting on the power fc for knock and engine light; was it 60? bu who knows how high its going Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4246767 Share on other sites More sharing options...
donkey Posted November 7, 2008 Author Share Posted November 7, 2008 hey there, i had a power fc, now a LINK G4, my mechanic said the LINKG4 overrides the engine check light? but the turbo shuffle, shouldnt be shuffling when spooling up? correct? heeeeeeeellllllllllllllp Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247211 Share on other sites More sharing options...
donkey Posted November 7, 2008 Author Share Posted November 7, 2008 ok helpwhere do i start, R33GTR had; power FC, pods, exhaust, camgears....great fun, loose traction a bit, nice low down power wanted more power, now im running; big 115 FMIC, LINK G4 no AFM's, 770, profect b, custom dumps, nismo pump, and one of the most talked about subject 2860-5's, everything new. 320awkw, tuned for torque, 7200 RPM limit, 18lbs. got the car back and really miss my low down power. i realise these turbos a more for mid-upper top end power now, but i didnt think they would be this laggy, i think now i should have gone for the -7's? dam questions; turbos are making the 'cho cho noise' the whole time, not on deaceleration, or holding throttle, like my old ones(standard) did, but now when accelerating, sounds like they are fighting each other, irratating. engine light on, on full boost ticking noise from turbos when boost starts to come on (internal wastegates?) i know these turbos are for around 350-400AWKW, but i dont want to crank the boost, destroy the engine but the car feels so lifeless, will uping boost give me a lil more low down power? or go to the -7's? good news which i will post in gearbox seaction, HKS twin plate, light weight flywheel, real easy to use, no stalling easy as! when i started these mods about 1 year ago didnt know anything about modding these cars, so went on my mechanics advice, so please no lectures my mechanic is 550km away so any help would be great on the noises cheers please note i 'had' a power fc, mow a LINK G4 Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247445 Share on other sites More sharing options...
R31Nismoid Posted November 7, 2008 Share Posted November 7, 2008 What BOV's and intake piping setup do you have? Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247498 Share on other sites More sharing options...
Bumblebee Posted November 7, 2008 Share Posted November 7, 2008 stock bovs n piping r the best way to go... hope u havent changed them at all Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247501 Share on other sites More sharing options...
donkey Posted November 7, 2008 Author Share Posted November 7, 2008 (edited) hey, i did tell him to leave stock BOV's, but he said they where leaking/not holding pressure? sorry dont no what BOV he put in but said they where holding pressure, piping no not stock, all custom made intake etc Edited November 7, 2008 by donkey Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247517 Share on other sites More sharing options...
R31Nismoid Posted November 7, 2008 Share Posted November 7, 2008 Thats likely to be your problem then im afraid. Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247578 Share on other sites More sharing options...
donkey Posted November 7, 2008 Author Share Posted November 7, 2008 Thats likely to be your problem then im afraid. hey would the problem be BOV's, or piping, or both? and does this ruin the turbos, hinder performance? should i get a new stock BOV thanks for you help Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247595 Share on other sites More sharing options...
Bumblebee Posted November 7, 2008 Share Posted November 7, 2008 both ive talked to all the best gtr tuners in our lovely country for my big power app and they all say the same thing. Stock piping and stock bovs are the best way to go on a gtr... changing the piping will unfortunately increase turbo shuffling. if u want to minimise it, got back to stock bovs n stock piping. Ben from RacePace even laughed when i suggested that i wanted to run all hks piping from afms all the way to the plenum... stock is best Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247602 Share on other sites More sharing options...
donkey Posted November 7, 2008 Author Share Posted November 7, 2008 (edited) bothive talked to all the best gtr tuners in our lovely country for my big power app and they all say the same thing. Stock piping and stock bovs are the best way to go on a gtr... changing the piping will unfortunately increase turbo shuffling. if u want to minimise it, got back to stock bovs n stock piping. Ben from RacePace even laughed when i suggested that i wanted to run all hks piping from afms all the way to the plenum... stock is best crap i wanted it all left stock aye, would going back to a stock new GTR BOV help shuffle a bit??????? i think it is onlr running one BOV too? does this sound right? Edited November 7, 2008 by donkey Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247606 Share on other sites More sharing options...
Bumblebee Posted November 7, 2008 Share Posted November 7, 2008 going back to stock will help. ben explained to me that the reason by the stock bovs r the best ones for the job is because they are one of the few bovs that actually stay open under light throttle which apparently help to minimise shuffling Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247632 Share on other sites More sharing options...
donkey Posted November 7, 2008 Author Share Posted November 7, 2008 going back to stock will help.ben explained to me that the reason by the stock bovs r the best ones for the job is because they are one of the few bovs that actually stay open under light throttle which apparently help to minimise shuffling just reading in the 'search" seaction some peopls saying BOV's arent the main problem, maybe advance the timing? Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247638 Share on other sites More sharing options...
Bumblebee Posted November 7, 2008 Share Posted November 7, 2008 im just going by what one of the best gtr tuners are saying. thats all if u wanna take someone else word over his, thats cool just letting u know what he told me... im running a pair of 2871r's -10's so theyre rather large twins and thats the best way for me to minimise shuffling. just so know u.. im a mechanic and timing wont do anything to avoid shuffling... its about the turbos producing boost @ different stages.. thats it... Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247677 Share on other sites More sharing options...
archie01 Posted November 7, 2008 Share Posted November 7, 2008 Change your intake setup (post AFM to turbo inlet) and your bov's back to stock and your problem will be fixed. Have heard of another case just like yours with aftermarket intake kit. Went back to stock and it was all good. Link to comment https://www.sau.com.au/forums/topic/243679-gtrrrrr/#findComment-4247704 Share on other sites More sharing options...
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