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Cost of a vk56 swap

Originally Posted by 1slow370 Fi is not out of the question, i have been thinking about a little something, maybe a small insta boost turbo for 450-500hp Sent from my

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Old 08-11-2014, 09:57 AM   #181 (permalink)
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Originally Posted by 1slow370 View Post
Fi is not out of the question, i have been thinking about a little something, maybe a small insta boost turbo for 450-500hp

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The idea of the small single turbo is a great idea. One idea that seemed like something I'd consider would be a twin turbo setup with 2 different sized turbos. One small for that instant boost and another larger one for big power up top

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the heads are probably going to get worked over, port polish, jun stage 2's maybe a little something xtra
that's gonna be sweet
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Old 08-11-2014, 09:58 AM   #182 (permalink)
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The idea of the small single turbo is a great idea. One idea that seemed like something I'd consider would be a twin turbo setup with 2 different sized turbos. One small for that instant boost and another larger one for big power up top
just like the BMW and Audi bi-turbos lol
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Old 08-11-2014, 09:59 AM   #183 (permalink)
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just like the BMW and Audi bi-turbos lol
Yeah exactly. I wonder how a twin charger setup would work in the Z
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Old 08-11-2014, 10:01 AM   #184 (permalink)
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Yeah exactly. I wonder how a twin charger setup would work in the Z
not sure. you'd probably need the input of someone with more boost knowledge than myself lol
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Old 08-11-2014, 10:40 AM   #185 (permalink)
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Sequential twins would be pretty sweet. That would be an interesting take on FI for the VQ.
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Old 08-11-2014, 12:47 PM   #186 (permalink)
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Sequential's are kind of a pain in the **** because there is a lot more to it than just putting two different sized turbo's on it. you end up needing to add in exhaust valves and intake valves, and a way to control them so that when say number 1 turbo is spooling up the air isnt just blowing through the larger number two turbo's compresser housing backwards.
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Old 08-11-2014, 02:04 PM   #187 (permalink)
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Sequential's are kind of a pain in the **** because there is a lot more to it than just putting two different sized turbo's on it. you end up needing to add in exhaust valves and intake valves, and a way to control them so that when say number 1 turbo is spooling up the air isnt just blowing through the larger number two turbo's compresser housing backwards.
It's called compound turbo charging and is done all the time in the diesel performance world. It has also been done on OTR heavy haul truck engines. Cat has a setup like this. There is also tripple compound turbo charging. Turbo sizing is key to keep each charger in it's map.
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Old 08-11-2014, 02:43 PM   #188 (permalink)
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Or you can buy one of Porsche's variable turbine geometry turbo's and call it a day.
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Old 08-11-2014, 02:59 PM   #189 (permalink)
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Yeah no... I dont really care anyway anything past 500hp is worthless to me at this point. And vgt turbos have reiability issues

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Old 08-11-2014, 03:01 PM   #190 (permalink)
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I'm just jumping in here, but this conversation got pretty interesting. I am looking into possibly swapping a VK56 into a Y34, but for the Z guys, why not the VK45 instead of the 56? Seems like it might be a bit easier and should still make plenty power.
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Old 08-11-2014, 04:27 PM   #191 (permalink)
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Quote:
Originally Posted by Spooler View Post
It's called compound turbo charging and is done all the time in the diesel performance world. It has also been done on OTR heavy haul truck engines. Cat has a setup like this. There is also tripple compound turbo charging. Turbo sizing is key to keep each charger in it's map.
no compound or series charging is when one turbo FEEDS the other turbo. They use it in the diesel world because by doing so you stack pressure ratios. so if one turbo can efficiently compress the air to 39psi absolute it feeds that charge into the second turbo that can push it up to 109psi while still in it's efficiency island. Diesels love having more compression so by doing this even if the turbos are relatively small it allows the engine to run at a much higher dynamic compression ratio.

Edit: the key in sizing doing that is just to match the pressure ratio's and efficiencies of the two turbo to get the target boost pressure, and to make sure that the intake turbo can flow enough compressed air to supply the second turbo

The VH45 is no bigger than a stroked vq so by going vk5.6 you have enough extra displacement to really make a crazy build worth it. the vh is good engine, revs higher than a vk stock but it is a little small to justify it.
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Old 08-11-2014, 05:04 PM   #192 (permalink)
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Originally Posted by 1slow370 View Post
...The VH45 is no bigger than a stroked vq so by going vk5.6 you have enough extra displacement to really make a crazy build worth it. the vh is good engine, revs higher than a vk stock but it is a little small to justify it.
You're correct, but I'm referring to the VK45, not the VH45.
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Old 08-11-2014, 06:26 PM   #193 (permalink)
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You're correct, but I'm referring to the VK45, not the VH45.
same deal. since vk45 and the vk56 are basically the same engine but one is bigger, cheaper, and more available the choice is easy.
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Old 11-25-2015, 08:14 AM   #194 (permalink)
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Subd for later!
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Old 11-25-2015, 11:04 AM   #195 (permalink)
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Well the platform changed a bit but same swap. its going in the 260z now hahaha. got the motor for 1500 with low miles, picked up a freshly rebuilt vortech v1 s-trim for 300 dollas and the trans came from the donor car for the 350z subframes. Still need a clutch and flywheel.
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