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Z31 300ZX(T) 1984-1989 Zs - Engine and Chassis Discussion


       
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Old Feb 29th, 2004, 09:39 PM   #1 (permalink)
asleepz
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Changing out Turbo

Alright on my 87 300 Turbo. I want to know all of the plug and play turbos I can put on her. Correct me if I am wrong but don't they run Garret T3s stock? What other turbos can I just "bolt on"
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Old Feb 29th, 2004, 09:44 PM   #2 (permalink)
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by the way is it possible and where could I get a Twin-Turbo kit..

What are the side effects?
What could go wrong?
What would it cost?
Where could I get it?
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Old Feb 29th, 2004, 10:53 PM   #3 (permalink)
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SKD_Tech,

If you have headers (two exhaust manifolds) you can do twin turbo. but running twin turbo you will be pushing twic the boost. Are you sure that that year and all those miles can handle that. I would look into a engine rebuild before going with another turbo, or turbo set-up.
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Old Mar 1st, 2004, 06:35 AM   #4 (permalink)
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I plan on getting it rebuilt this summer.
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Old Mar 4th, 2004, 09:31 AM   #5 (permalink)
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Hey man, that is incorrect. Just b/c you have a twin turbo doesnt mean youre running twice the boost- if youre running one turbo at 20 psi and add another it does not equal 40 psi- it really doesnt do anything except run 20 psi. You cant add pressure to the same amount of pressure and get more. Notice that the plenum on the z32 tt is actually two , not one. One turbo for each bank. With the t-3 you could always get a t-3/t-4 hybrid
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Old Mar 4th, 2004, 11:31 AM   #6 (permalink)
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Quote:
Originally Posted by 0341TODD
Hey man, that is incorrect. Just b/c you have a twin turbo doesnt mean youre running twice the boost- if youre running one turbo at 20 psi and add another it does not equal 40 psi- it really doesnt do anything except run 20 psi. You cant add pressure to the same amount of pressure and get more. Notice that the plenum on the z32 tt is actually two , not one. One turbo for each bank. With the t-3 you could always get a t-3/t-4 hybrid
I agree.
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Old Mar 4th, 2004, 04:42 PM   #7 (permalink)
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So I can buy a brand new Garrett T3/T4 hybrid and it should just be a bolt on? No mods? What is the difference with the hybrid?
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Old Mar 12th, 2004, 09:51 PM   #8 (permalink)
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A Garrett T3/T04e turbo will equall this:

Your car has an exhuast flange matching a T3 in basic terms....
and a T3/T04 hybrid uses the exhaust T3 sizing turbo and a T4 intake (compresser) side.

This means... your intake is bigger and will compress the air more efficiently and compress more air than the stock....

It depends on if you get ball-bearing (turbo spools nearly 2 or 3 times faster than a normal turbo) which means faster spooling which means faster boost... which means little LAG (amount of time it takes for the exhaust to spin the turbo and compress the intake air)

A good T3/T04e from Garrett will run you about $600 and you can pick any trim level you want on intake and exhuast sides.
Your best bet is a .57 trim on the intake compressor.


Twin Turbo wise... is a waste... more expensive.. but more efficient.
Twin Turbo setups usually have 1 small turbo and 1 big turbo. THis means the small turbo will spool up much faster and give you boost and HP at low RPM's but the big turbo will spool up at higher RPM's. This is a sequential setup.

Twin Turbo setups with the same size turbo's usually have twin turbo's because on V style engines (v-6 engine) compared to an inline 6 engine is because the routing of the piping for the intake and exhuast manifolds are more complicated since each exhuast manifold are on seperate sides of each other. Grr... i'm not making sense. Pretty much, instead of 6 cylinders pushing out all the exhuast gases into one pipe to spool a turbo, instead the setup is split, so 3 cylinders provide spooling for one turbo, and the other 3 spool the other turbo. Twin Turbo's allow faster spooling for more air or boost at lower RPM's and less Lag.

TWIN TURBO'S DO NOT DOUBLE THE BOOST! Only allow faster spooling and more "efficient" air intake compression so they say.

The turbo will bolt right on yes... mods? you may want a more efficient downpipe and since you have a larger intake from the turbo (t4) you can get bigger piping for more air.

Then again if you have a oil cooled or water cooled turbo and you want to switch to whatever side, that would require mods.. but if you keep the stock cooling system your good.
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Old Mar 15th, 2004, 09:27 PM   #9 (permalink)
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DO NOT CONVERT TO A TT SET-UP IT WILL KILL HP ON YOUR Z31 AND LIMIT YOUR CARS POTENTIAL. Single Turbo set ups are more efficient. Single Turbos flow more efficiently and are mechanically much simpler. More is not better in the world of Turbos please do not ruin your Z31 by wasting your money on a TT set up. Look at all the grand national cars (HIGH HIGH HP VEHICLES) they all are single turbos also if you look at alot of high power cars that were originally TT you will notice that they inevitably convert to a single turbo design. TTs will only give you off boost response they will never get you anywhere. Ball Bearing Turbos are nothing better then a normal Turbo in the end on a Z31 they are a waste of money Turbos spool faster becasue of lighter internals NOT BECAUSE OF BALL BEARINGS. If you want some ideas on Turbos look to Jim Wolfe Technologies http://www.jimwolftechnology.com/ they have been working with Z31s for years and they really know their Zs.
The single turbo is much better keep the set up on the Z31 just upgrade your turbo.
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Old Mar 15th, 2004, 10:26 PM   #10 (permalink)
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Quote:
Originally Posted by SKD_Tech
Alright on my 87 300 Turbo. I want to know all of the plug and play turbos I can put on her. Correct me if I am wrong but don't they run Garret T3s stock? What other turbos can I just "bolt on"
THe JWT Sport 450 turbo is the biggest plug and play turbo yo ucan run, it can produce 450 hp. Its an internal wastegate TO4E/T31 combo.

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Old Mar 15th, 2004, 10:49 PM   #11 (permalink)
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They also have a nice package that comes with a turbo of your choice (what type of Turbo you need for your set-up), if you need it an intercooler, bigger injectors, a cobra MAF, the Popcharger (cone filter that goes on the end of the new cobra maf), a computer reburn (to what mods you have on the car), and a few other nicities that will really boost your engines power. Prices Vary LOL
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Old Mar 15th, 2004, 10:55 PM   #12 (permalink)
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Quote:
Originally Posted by JAMESZ
They also have a nice package that comes with a turbo of your choice (what type of Turbo you need for your set-up), if you need it an intercooler, bigger injectors, a cobra MAF, the Popcharger (cone filter that goes on the end of the new cobra maf), a computer reburn (to what mods you have on the car), and a few other nicities that will really boost your engines power. Prices Vary LOL
Good point, the package with a 3" or bigger exhaust and a front mount will turn a Z31 into a rocketship.

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Old Mar 16th, 2004, 06:19 AM   #13 (permalink)
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How much is the package?
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Old Mar 16th, 2004, 10:15 AM   #14 (permalink)
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Quote:
Originally Posted by SKD_Tech
How much is the package?
It matters what you want and how much you really want to spend. Go onto the site and look at the stuff for the Z31.
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Old Mar 16th, 2004, 02:55 PM   #15 (permalink)
asleepz
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I've been there and looked I want :
The 450 Turbo
and a Intercooler
Injectors
and a Reburned ECU
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