I just finished up my swap and i'm running a 60 trim ct 26 on my 1j motor. I have an aftermarket FMIC with hard pipes. Currently i'm running just a downpipe until i get the car to the shop so i can finish my exhaust. I'm running a greddy type R BOV. At idle when the engine is revved the BOV does not go off and you can hear the surge, under a load you can hear the bov but i think there is still some surge. The vacuum lines are hooked up on the bov. Is there certain vacuum lines that i should use? I don't why the BOV is not doing its job and i don't want to drive the car when this is happening. Any help is appreciated.
1JZ Compressor Surge!!!
- Thread starter Dejvid1785
- Start date
I had that BOV on another car (RX7) and loved it. IIRC a post TB vacuum line needs to to hooked to the top nipple and a line from near the compressor should be hooked to the bottom. Is that how you have it? Sorry I don't know enough specifics about the 1J yet to referrence exact vacuum sources. Good luck, that BOV is awesome when it works correctly.
do u have the standard spring or the hard spring?
ull need to loosen the BOV so it will open at a lower boost. but not to much otherwise it will let boost out when u go under boost(lol read it twice)
compressor surge is dooopee
same BOV as u
http://videos.streetfire.net/video/Sick-Supra-w-Greddy-TypeR_136360.htm
but thats external gateee
ull need to loosen the BOV so it will open at a lower boost. but not to much otherwise it will let boost out when u go under boost(lol read it twice)
compressor surge is dooopee
same BOV as u
http://videos.streetfire.net/video/Sick-Supra-w-Greddy-TypeR_136360.htm
but thats external gateee
Well i just ordered the soft spring meanwhile i had this knock off greddy type s at home i tried running that and i'm still getting surge. When you say run a vacuum line from near the compressor where exactly do i run one from?
That would be anywhere post turbo and pre TB, you want a source that dose not see vacuum only boost.
Big BOV's like that are known for slow response, and more so at low or no load. If you had it on the street and got over say 6psi boost and backed off it would work properly.
You need to make sure that you have it set up right though or it will surge. Make sure you have all the lines hooked up right and that the lines are not too small. Find a vac line diagram for hooking up that BOV and should be fine. You want to adjust it so that when driving once you back of you do not get any chirps of compressor surge. But tight enough that it stays closed at idle and no load. With a BOV this big at lower boost they can be hard to set up.
On my Tial 50mm I got the biggest Vac source I could find and put the lightest spring in it to get rid of compressor surge.
On a side note be very carful of that 60 trim upgrade CT and compressor surge. The wheels is already pushing the limits of shaft size on that unit and surge will just make it worse.
Big BOV's like that are known for slow response, and more so at low or no load. If you had it on the street and got over say 6psi boost and backed off it would work properly.
You need to make sure that you have it set up right though or it will surge. Make sure you have all the lines hooked up right and that the lines are not too small. Find a vac line diagram for hooking up that BOV and should be fine. You want to adjust it so that when driving once you back of you do not get any chirps of compressor surge. But tight enough that it stays closed at idle and no load. With a BOV this big at lower boost they can be hard to set up.
On my Tial 50mm I got the biggest Vac source I could find and put the lightest spring in it to get rid of compressor surge.
On a side note be very carful of that 60 trim upgrade CT and compressor surge. The wheels is already pushing the limits of shaft size on that unit and surge will just make it worse.
I been trying to find a install guide online for that type r but i'm having no luck. If someone knows where i can find some info let me know. thanx
You might need a stronger (bigger) vacuum source. On my alltrac, the tial wouldn't open hardly at all until I tapped into the Brake booster vac line and T'd it to the Tial, it opens just by reving the car now.
So you're saying tap into the brake booster vacuum but that vacuum source comes from the intake manifold also i can't why there would be soo much difference.
Turbo Drifter;1110929 said:
So if my BOV is open at idle that means its wrong? I'm confused now. I don't have much less vacuum at idle than when i let off the full boost. It's about 28lb at maximum after boost and about 23-24 at idle. So in this case should it be closed at 23 and open at 28?
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Dejvid1785;1111012 said:
Worth a shot maybe? On the 3sgte there are limited vacuum ports so the one I tried was T'd off a couple times all ready and just wasn't strong enough. The 1jz has several vac ports off the Intake manifold, so try to use the larger vacuum port and size it down (if needed) right before the BOV its self.
Is anbody in here running a ct with a 1j? I would love to see pictures of how you ran your vacuum lines.
Pernilongo;1111026 said:
At idle there is no boost pushing on the BOV, the pressure in the Intercooler piping needs to be taken into account. On a MAP car you can run with the BOV open but you run the risk of sucking crap in it.
I hope this makes sence.
Jeremy
Turbo Drifter;1110929 said:
Turbo Drifter;1111055 said:
YEah i think it does. I never realized that when its open at idle it sucks it all in. I guess i was confused by the purpose of the BOV to blow the pressurerized air out. So if i have a Blitz Bov with the SUS filter attachment it should help with this situation right? Thats why they included it. Thanks alot
It looks like my spring it too weak to hold the amount of vacuum i have. This Blitz BOV spring is rated only at 17 lb max. It is always open, i tried to adjust it for hardness but still with no results. The only thing that helped was to block of the low boost port. only then it doesn't leak.
Tell that to my GT40 that lasted all of about 2000kms before requiring a rebuild1JZS13;1110738 said:compressor surge is dooopee
annoyingrob;1112754 said:
:aigo: Wow that turbo did not last long at all. What did you do to fix the problem?
10secdream;1112901 said:
I removed the spring from my SSQV so that it opens easier. This allows it to vent more air when running mid-boost.
The proper way to handle it would be to install a 2nd BOV.
annoyingrob;1119443 said:
ouch. its luck of the draw on turbo life with compressor surge.
i had a ebay turbo run strong for 1yr and 4 months almost. then another one blow up in 5 mins. AHAHAHA.