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turbo swap

justin parker
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justin parker Rookie

justin parker

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hey guys i know it’s probably a stupid question but i recently got a new turbo and just wanted to know how bad for my car it would be if i drive it with everything else stock in the car aside from a front mount intercooler i have a 1998 r34 gtt and i am putting a Kinugawa Turbo 3" Anti Surge TD06SL2-20G for Nissan Skyline 

just wondering and hoping someone would know how much more i’m gonna need to upgrade 

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Duncan Grand Master

Duncan

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Hi mate, if it starts and drives I'd be surprised, and if you bring it onto boost you will probably kill the motor.

A larger turbo pushes more air (even at wastegate boost), but the factory ECU will only have limited ability to deal with that (say, within a couple of %). Once it goes outside what it expects, it adds heaps of fuel and removes heaps of timing to keep the engine safe from what it expects is a malfunction.

You'll need a tune and/or aftermarket ECU, larger injectors, either larger air flow meter or swap to MAP sensor, probably a boost control solenoid, all the usual. 

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Kinkstaah Grand Master

Kinkstaah

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This is going to sound simplistic, but it is, and here I go

Everything on the car exists to support the turbo

So if you change that, the list of things you should _consider_ upgrading is approximately the entire vehicle.

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GTSBoy Grand Master

GTSBoy

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Agree with the above.

To put it plainly - the stock turbo is good for ~200rwkW at just enough boost pressure to make it explode (<14 psi). Everything on the car that works with that - the fuel pump, the injectors, the AFM - all of these are only good to about that power level. Some a bit less, especially if old and tired. Some a bit more. But all about the same. The stock clutch will not tolerate even that much for long. The stock auto gearbag will raise the white flag at that power level too.

The TD06 you're putting on is good for upwards of 260 rwkW, at substantially more boost. But even at the same boost as the stocker, it will make a lot more power. As Duncan said, if you put your foot down and ramp up the boost, you will push past the capacity of the fuel system to keep up with the air flow, lean it out and pop it.

Unlike what Duncan said, I would expect it to start and drive. It is an AFM ECU, so it will measure the idle and cruising air flow and provide fuel for that just fine. And that's the danger. Because it should feel fine and it will want to go and when you do.....pop.

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justin parker Rookie

justin parker

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11 hours ago, Murray_Calavera said:

What ECU are you going to use? 

Are you going to install all of the supporting mods yourself and then pay a workshop to tune it?

yeah i’ve talked to a shop and they told me the supporting mods i need then im leaving the ecu stuff to them. i have a automatic r34 so they said my stock ecu will control the transmission and the will wire in a haltech 

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