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Posted 26/7/2012 15:51 (#14465 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Location: An island off southern Tasmania.

Thanks for posting this information.

Don't worry about the language it is fine.

stayer

Posted 26/7/2012 15:54 (#14466 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Posts: 286
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Location: Russia, Perm

Even some of the members American forums asked me to calculate the engine 6G75MIVEC , to get the 400 HP. This will be retained without change gearbox. I have made a calculation.
Pressure 0.53 bar (7.7psi), Absolute pressure 1.53 bar
Injectors 6 x 360cc
Basic air flow 9.76 kg/min (21.52 lb/min)
Air consumption with the turbo 14.93 kg/min (32.92 lb/min)
Thus, if 1 turbocharger, the optimal choice of GT3582R 1.06A/R

For the application of twin turbo, the optimal choice of 2 turbochargers GT2252

I want to say, the pressure is higher 6psi, requires the use of the cooler. The cooler will take away a portion of the pressure, so when choosing a chargers, pressure is slightly higher than estimated.

stayer

Posted 26/7/2012 15:57 (#14467 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Posts: 286
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Location: Russia, Perm

This is a very small compressor. This will avoid the lag. It occupies very little space.

(47ce5089cb33.jpg)

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47ce5089cb33.jpg (41KB - 554 downloads)
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ecc37f8ba06c.jpg (44KB - 557 downloads)
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1fcac0f2164d.jpg (53KB - 580 downloads)

stayer

Posted 26/7/2012 16:03 (#14468 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Posts: 286
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Location: Russia, Perm

There is one more option. Compression ratio. The boost pressure is very low. So no change in the engine does not have to. However, I want to give a formula for the calculation.
the total compression ratio = compression ratio + (boost pressure) in square
9.5 + (0.31x0.31) = 9.6
As you can see, nothing will not need to change.
if you calculates high boost pressure, for example 1.5 bar (21psi)
9.5 + (1.5x1.5) = 11.75
in this case it is necessary to reduce the CR.

stayer

Posted 26/7/2012 16:19 (#14469 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Posts: 286
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Location: Russia, Perm

Turbocharger always have the map. You can see the flow of air on the map. Each charger has its own bandwidth. That is, you can't raise the pressure indefinitely. For example, look at this map. On the left side of the chart, the air flow, pressure from below. As you can see, after 2 bar, the flow is not increased.

(739548-1&064turbweb.jpg)

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739548-1&064turbweb.jpg (196KB - 579 downloads)

stayer

Posted 26/7/2012 16:32 (#14470 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Posts: 286
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Location: Russia, Perm

At first I wanted to make the exhaust manifold of the stock manifold. Here are a few pics of how it was. But then I had to make another collector.

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a09a3882edfe.jpg (64KB - 567 downloads)
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8b839a4e3a55.jpg (56KB - 577 downloads)
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0d7593d8e8ae.jpg (58KB - 571 downloads)
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7188e086a005.jpg (66KB - 698 downloads)

stayer

Posted 26/7/2012 16:44 (#14471 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

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Posts: 286
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Location: Russia, Perm

However, when I installed the exhaust manifold, he rests in the fan cover. So I decided to make a new exhaust.

(28ff126816f3.jpg)

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28ff126816f3.jpg (60KB - 591 downloads)
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f1bb4a275e78.jpg (61KB - 570 downloads)

stayer

Posted 26/7/2012 16:51 (#14472 - in reply to #14454)
Subject: Re: Turbo kit for 4G69

Frequent flyer Gold

Posts: 286
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Location: Russia, Perm

I want to tell you to do as a new exhaust manifold. I bought the elbows and tees from heat-resistant steel (wall thickness 4 mm) And also cut industrial laser 3 parts (12 mm thickness)
To work will require argon welding.