93 zx NA >> Single Turbo

The Nissan 300ZX (Z32) general community discussion forum
SportTheWood
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Joined: Thu Aug 19, 2004 6:46 pm

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I've read up a little on the conversion to TT problems and what not... Mostly cost of parts and labor seem to be the biggest issue.

How about Single Turbo? Not quite as complex... less problems arise... etc. Less moving parts usually means less break down.

I mean there are single turbo cars pushing more than 300HP running 2.0L 4 cylinders... so i'm sure it could be acheived with a 3.0L v6...

Give me your ideas on that... I'm looking at a 300zx NA tomorrow... so i planned on reading up and everything B4 i bought it. And as others have mentioned... zxTT's are hard to come by in good condition. This NA is in perfect condition from what my best-friend tells me.

The guy bought it for his daughter... she hated it (moron)... so it sat for 2 months and he's decided to sell it. Low miles... dont know exactly how many. Perfect interior... small chips in paint on front bumper but i'd throw a kit on anyway.

A little about me too is... I'm a hot rod mechanic at heart... I owned/drove/tuned/test/built a 5.0 Mustang running 11.9's (not great...b ut enough for me)... So i'm pretty mechanically enclined... I'm also an Automotive student... ASE certified all 8 categories (just dont have the experience years to be a master tech)... Going to work for a mechanic's shop near by soon... so my labor will cut the costs down dramatically. Just a heads up sorry for the bible here.


IvoryJ30t
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Car: 95 Maxima GLE, 95 Maxima GXE

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good luck.

going single turbo is going to be more difficult than a twin turbo transplant.

SportTheWood
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Joined: Thu Aug 19, 2004 6:46 pm

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can u elaborate on why a single turbo set-up would be more difficult than a twin? i know the parts that i need to get for a turbo would be: turbo, manifold (how would this be done if V6? would turbo be mounted under engine?), dp, bov, wastegate if not internal, ic and piping, oil lines, (what is the situation with the injectors, pistons and rods...whats the limit on the stock NA's?) safc (for A/R)

IvoryJ30t
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Car: 95 Maxima GLE, 95 Maxima GXE

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imagine what the exhaust manifold is going to look like.

it has to collect the exhaust gasses from both sides of the motor and collect to a single outlet for the turbo.

you can get twin turbo front clips from japan for around $2500that basically includes everything you need for a transplant.

you would probably spend close to that amount just fabricating a single turbo manifold.

and even after you build the manifold, where the hell are you even going to fit a single turbo under the hood of that car???

SportTheWood
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Joined: Thu Aug 19, 2004 6:46 pm

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I would have the exhaust manifold come down like normal and then connect at one..and have the turbo sitting right there..i think i can find a link to one..my roomate had a V6 Mazda Mx6 and they make one for it that runs the pipes and everything to the turbo...(http://www.mx6.com/forums/show...t=PMO)

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Checkered-Member
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Car: 1998 Nissan Altima (modded)
2003 Audi A6 2.7T (stock)
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The back pressure on both sides is going to be different, which will make the mixture of air and fuel different…how are you going to tune it? Tune 3 cylinders one way…and the other 3 another…can’t be done…and since half the cylinders will be running hard and the other once less…it will throw the balance...you'll disintegrate the engineand you will detonate because there will be a difference in the fuel mixtures...And the lag…oh boy…

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IvoryJ30t wrote:you can get twin turbo front clips from japan for around $2500that basically includes everything you need for a transplant.
I second that, a J spec engine is allot better built, at least my friend swears on his life it is

SportTheWood
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Joined: Thu Aug 19, 2004 6:46 pm

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did u not look at the piping in the pic? both exhaust manifold lead to one flange..the turbo...then back to the intake...which couldnt possibly be that hard...and the tuning of the air/fuel will be done by a SAFC...

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boileralum00
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Car: 94 Miata, 95 FZR600R

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You do realize that the intake manifold consists of 2 throttle bodies, right? Getting the airflow perfectly balanced between those 2 is going to be tricky.

IvoryJ30t
Posts: 3076
Joined: Sun Aug 17, 2003 1:36 pm
Car: 95 Maxima GLE, 95 Maxima GXE

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my post from yesterday is gone due to the restore from backup.

single turboing the non turbo motor with a single turbo setup like the one you show above [that manifold makes engineers want to cry] is a bad idea for many reasons.

first off, theres no balance of the exhaust banks with that manifold. after the exhaust leaves the turbine, your stuck with a single exhaust pipe. [if you can even get a manifold like that to wrap under the motor in the Z]

second, even though the z uses a single maf [the one good point of this discussion] , it uses twin throttle bodies that feed opposite banks.

the right side turbo feeds air to the right throttle body. the right throttle body feeds the air to the left side cylinder bank. the left side cylinder bank drives the left side turbo, which feeds the left side throttle body, which feeds the right side cylinder bank.

you taking that natural balance that was engineered into the motor and tossing it out the window.

this is a bad idea from the start.

from an engineering standpoint, this is not something you want to even attempt.

a simple swap to a JDM VG30DETT will be easier, cheaper, and far better.

Roush97
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Joined: Sat Aug 28, 2004 12:39 pm

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what are the differences from the jap spec from the american spec?

IvoryJ30t
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Joined: Sun Aug 17, 2003 1:36 pm
Car: 95 Maxima GLE, 95 Maxima GXE

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i assumed they were the same, but without all the emissions crap [egr, precats]

its a good idea to go JDM with that car because you need so many bits and pieces that a front clip is the best way to go about it.

and its certainly easier than buying all the parts individually.


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