New with turbos. Need opinion

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Deboltboy
Posts: 4
Joined: Thu Nov 20, 2014 1:28 pm
Car: 1991 300zx TT Fairlady
Location: Edmonton Alberta, Canada

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I have a 91 TT fair lady and one of the turbos is shot. If I bypass the who turbo system and just stick a filter directly to the throttle bodies and run as a non-turbo will the computer be able to adjust to that or will I just do gradual damage to the motor? Just need it mobile Asap and can't afford a turbo replacement at the moment. Any suggestions?


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NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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If you are serious and not trolling then I have the following to say to you.
1. that is a really stupid idea (sorry no other way to put it but be a d!ck)
2. Theoretically yes your ecu will adjust if you cut one turbo out of the loop but you are just asking for issues.
3. If you end up doing this, DO NOT drive it often, get it where it needs to go and stop driving it.

If you cannot afford to own a Z32, you shouldn't for two huge reasons:
1. You will end up slowly destoying a wonderful, rare, beautiful example of everything right (automotively speaking in a nostalgic tone)
2. You will end up going broke in the process, these cars are not cheap to maintian or repair, a Z32 will spend your paycheck faster than a redneck baby momma with a meth habbit.

ThisIsSparTTa
Posts: 738
Joined: Wed Sep 26, 2012 6:02 pm
Car: 91 300ZX TT 2+0

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Go find a running NA or TT engine and shove it in there. Better yet, just go find a used turbo that's not dead. This is a terrible idea across the board. You're going to spend more time and money trying to hack together something that makes no sense and has no benefit than either of my alternatives.

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veery
Posts: 158
Joined: Wed Oct 15, 2014 7:48 am
Car: 06 M35x Umbria Grey
Location: Danby NY

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ThisIsSparTTa wrote:Go find a running NA or TT engine and shove it in there. Better yet, just go find a used turbo that's not dead. This is a terrible idea across the board. You're going to spend more time and money trying to hack together something that makes no sense and has no benefit than either of my alternatives.
Replacing the turbo is the obvious solution. Get a winter rat and drive it while you begin saving your money. You can't operate on a shoestring budget and do your car justice. It would be better to sell it to someone who can, if you can't.

Deboltboy
Posts: 4
Joined: Thu Nov 20, 2014 1:28 pm
Car: 1991 300zx TT Fairlady
Location: Edmonton Alberta, Canada

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The only reason I can't at the moment is because I've been on a sick leave. Normally it wouldn't be a problem, like I said I've never touched these motors before, I know nothing about them so that's why I'm on here asking these questions. To make sure I don't damage the car. I have the spare turbos to throw in it, just don't have the resources to pull the motor. Unless there is a way to change the passenger side turbo without pulling the motor

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NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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Sorry no, the engine must come out at least partially to get to the turbo. These snails are a huge PITA to get on and off with the engine on a stand. Basically what you are suggesting is possible. And unless the turbo is spewing oil or coolant there is really no need to bypass it because all it will do is spin slowly or possibly be a bottleneck if its seized. Your engine can run off one turbo as the intake manifold is balanced by the balance tube (what a name huh?). If you absolutely must drive the car and you are afraid of it injesting/losing oil or coolant then I suggest you diconnect and cap the oil feed line and bypass the turbo with coolant hose. This way the worst you'll do is hinder the performance greatly unless you like continuously hanging out on the gass pedal, in which case major damage could occur.

Deboltboy
Posts: 4
Joined: Thu Nov 20, 2014 1:28 pm
Car: 1991 300zx TT Fairlady
Location: Edmonton Alberta, Canada

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Thanks that helps a lot. And the problem with the turbo is a seal I think. Covers the one side of the motor in oil. And makes the car burn oil as well

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NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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Well in that case, if you don't mind completely ruining the turbo, just disconnect the oil feed line and block it at the block. The turbo will sieze after a very short while like this though.


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