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Found 4 results

  1. Hey guys, I have a strange issue with my RB25DET. It seems to have a weird fluttering/wooshing sound when coming on boost, a lot louder than normal. It seems to build and hold boost ok, maybe a little laggier than usual. I'm thinking maybe a boost leak, but here's the spanner in the works: the weird wooshing sound disappears during medium-hard left turns?? How weird is that? Does anyone know what could cause this issue and why it disappears during left turns only??? Any help appreciated. Thanks.
  2. hey guys im a bit of a skyline/car noob so bare with me this afternoon i went to take my 33 out for a drive as i havent had the time in the last week and first off my battery was drained, which i guess was caused from the alarm system in it, maybe a light or door left open but thats not the problem, when i was trying to get it going i tried to jump start it down the drive way i didnt do it a whole lot or very far but just tried twice to get it going then afterwards just decided to start it using a different battery and then replaced mine back in to recharge, anyways when i went to put it in gear i noticed when i engaged the clutch it had a loud strange whine/whirr?? another person with me thinks its more of a grinding but i dont think so i let it sit for a while to charge the battery probably 30mins? (side note...heard rumors leaving skylines sitting in one spot for long periods is bad? is this the case as it did get pretty hot in there to the point it was making the ticks you get on a hot engine when turning it off) after it charged i took it for a drive to see if the noise would go away, if i was riding my clutch the noise wasnt there but if i had it fully engaged it was there, sometimes it would be loud sometimes barely noticeable.... does anybody know what this could be? the last time i drove it, it didnt have this noise but now all of a sudden it did after the battery went flat....
  3. Greetings at you all. Recentlyish I put a GTR BOV on my R33 GTS-t sedan just for fun and perhaps a little more Bov noise. All was good for a day or so, then it started doing the weird fart noise at about zero psi. I thought it may have been because I did the small hose inside a larger hose trick, so I got a 38mm - 28mm reducing style hose and put that on but it still does it. So I made up a plate from some aluminium sheet and drilled some smallish holes in it to use as a gasket, thinking that the reduced flow to the plunger might help. It gave me the flutters, so I made the holes bigger and back came the fart noise again. If I block off the bleed hole on the outside of the BOV will this fix it? That is the next thing I was going to try. I have tried a different GTR BOV and it still farts at the same zero psi and put my GTS-t Bov back on and the farts stopped. Yes the GTR spring is softer than the GTS-t and I guess the GTS-t bov leaks back into the piping but the GTR leaks out. The car may even be more responsive with the GTS-t bov on? Knowing that many people have used GTR bovs on GTS-t's and that this fart issue has come up before (as I have searched heavily but found no fixes). I am at a loss and am wondering if there is a reason it happens and a way to stop it. If all else fails, I'll just use my GTS-t Bov again. No big issue. In case it matters, I have K&N panel filter, silicon intake pipe, Stock Turbo, 10psi actuator, R34 smic, gutted cat and 3" catback blitz exhaust. Any wisdom is much appreciated. TL;DR ??? Why does a GTR BOV on a GTS-t Fart? How can the flatulence be stopped? Rob.
  4. Hi guys - Apologies if this is the wrong section So recently had my R34 GTT tuned running an RB25DET neo. Tuner said that at around 5000rpm he can hear a noise when listening in through the knock sensor. The ECU is picking it up as knock sometimes but it isn't actually knock. He said its almost a metal-on-metal sounding noise, and it starts at 5000rpm and dissapears at 5.5 every single time. Cannot hear it from outside the car, only when listening in through the knock sensor. I'm hoping for some help in narrowing down what it is. My dyno numbers are perfectly fine (will upload the sheet later tonight), power curve is stable etc. He believes it is something harmonic related as it is only at that RPM range. Have done runs with VCT disabled and it still makes it so that is not the culprit. He has suggested to me that it may be the intake cam gear although he's very rarely heard of them failing. My issue is they are a stupidly expensive part to replace for a "potential" fix. His other suggestions have been potential scoring on the cam lobes. Have you guys got any input on this? So noise starts every single run at basically dead on 5000rpm, stops at 5500. Almost a really fast " drdrdrdrdrdr" noise (best way i can describe it). One other thought by him was potentially a lifter. Unsure if this matters, but the car's running an S2 RB25DET neo, nistune ECU, 14psi boost, front mount, full exhaust, cold air intake. Car is also only 104,000kms. Car still drives perfectly fine and would have had no idea anything was making noise had he not told me. Any advice would be greatly appreciated!
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