backspinning turbos
#27
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I just listened to your video and I had the same noise coming from my turbo's. The secondary would not boost up. Now here are the things that I did. Make sure that the c clip is on the prespool arm (if thats not there then the secondary turbo doesn't get prespooled for the transition). The next thing that I looked at were to make sure the solinoids that are under the upper intake plenum are plugged in properly (you have to take off the vacuum chamber off next to the crossover pipe to get at them.) There should be a dot on one of the solinoids and connectors; make sure that they are not crossed. One final thing, did you wire open the wastegate when you did the non-sequential trans.? Hopefully this will help. I will try to remember what else I did and post it for you. But I eventually fixed the problem.
R.K.
R.K.
#28
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Originally Posted by skunks
hmmm that is a very strange sound. it does sound like it is surging (the only time i have heard that before is when people do not use their bov, sounds cool but its hell on your turbos!). i dont think that your butterflies have anything to do with it other then that they close like they are suppose to and the air slams in to it with no place to go.
im pretty sure your bov are not venting the air properly
have you tried to take off your hood, put the stock bov back on and getting a very long hose and routing it in to the cabin where you can have someone make 100% sure that they are working. i think this is the only way your gonna beable to make sure that they are. how is your idle, are you sure you dont have a air leak which is past your throttle body?
im pretty sure your bov are not venting the air properly
have you tried to take off your hood, put the stock bov back on and getting a very long hose and routing it in to the cabin where you can have someone make 100% sure that they are working. i think this is the only way your gonna beable to make sure that they are. how is your idle, are you sure you dont have a air leak which is past your throttle body?
#29
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Originally Posted by crazyrx7
I just listened to your video and I had the same noise coming from my turbo's. The secondary would not boost up. Now here are the things that I did. Make sure that the c clip is on the prespool arm (if thats not there then the secondary turbo doesn't get prespooled for the transition). The next thing that I looked at were to make sure the solinoids that are under the upper intake plenum are plugged in properly (you have to take off the vacuum chamber off next to the crossover pipe to get at them.) There should be a dot on one of the solinoids and connectors; make sure that they are not crossed. One final thing, did you wire open the wastegate when you did the non-sequential trans.? Hopefully this will help. I will try to remember what else I did and post it for you. But I eventually fixed the problem.
R.K.
R.K.
#30
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Did you check if all butter flies open on your TB and secondary? I would remove or keep the secondaries butter flies open to see if that's your problem. But check to see if all your butterflies open on your TB. Other than that I don't know what else to check
#31
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Do you have the stock rubber intake pipes? Here is a thought; maybe they are collapsing when the turbo's are trying to boost therefore you are not getting enough air flow to go throught the turbos. Also if you think its the tb just take off the elbow and see if they move freely. Just a long shot.
R.K.
R.K.
Last edited by crazyrx7; 11-04-04 at 10:14 AM.
#32
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Dunno if this will help but my mate somehow blocked his bov and did something with the wastegate lines on his S14 SR20T, and now it starts making whistle noise that comes out of the air filter! It sounds similar to yours but his one goes for longer... ssstototootoootoooo
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