need some input on a 350 - 375 (+) hp TT project....
06-30-2003, 09:39 PM
#21
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its hard to read that 3d graph, but i think its a too big turbo..
i figure, the N/A version of 1.8L makes max of 120HP, or so...
that turbo starts to pick up after 200HP+ on N/A... soo maybe this turbo won't do anything for your engine, or begine to make power at the very top end only..
you may never spool it up completly..
do you know anyone who has this setup? before you bomb out the cash?
that turbo starts to pick up after 200HP+ on N/A... soo maybe this turbo won't do anything for your engine, or begine to make power at the very top end only..
you may never spool it up completly..
do you know anyone who has this setup? before you bomb out the cash?
06-30-2003, 09:47 PM
#22
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Yeah, I understand all that... I was just simply mentioning the size of the turbo..
in question as I feel that has a larger impact on the amount of boost being run rather than the displacement and design of the 5v head since most of the iterations except for the 225 tend to be fairly similar.
Thanks for the math, tho
Thanks for the math, tho
07-01-2003, 11:41 AM
#23
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I think so....
Without an increase in boost, you're looking at a 12% increase in airflow just in displacement alone (1780cc vs. 1984cc)
300hp out of a 1.8 liter is 167hp/liter, so that's an extra 30hp on a 2.0
And that's HP/Torque through the hole RPM band, plus, theoretically, the turbo should spoolup 12% sooner as well.
So a turbo that spools up around 3500 RPM on a 1.8 should spoolup around 3150 RPM on a 2.0
This is probably one of the main reasons my 2.0 T3/T4 hits 15psi of boost just under 3000 RPM, that's better then smaller turbos on a 1.8
Some are saying the 2.0s aren't making as much power as they thought, but as far as I know, no one has a fully tuned 2.0
And if you're rebuilding the motor anyways, it's only an extra $500 or so for the crank (the pistons have to be spec'd for the extra stroke though)
$500 for 30+ HP (minimum) and spoolup 350 RPM sooner, that's a bargain
300hp out of a 1.8 liter is 167hp/liter, so that's an extra 30hp on a 2.0
And that's HP/Torque through the hole RPM band, plus, theoretically, the turbo should spoolup 12% sooner as well.
So a turbo that spools up around 3500 RPM on a 1.8 should spoolup around 3150 RPM on a 2.0
This is probably one of the main reasons my 2.0 T3/T4 hits 15psi of boost just under 3000 RPM, that's better then smaller turbos on a 1.8
Some are saying the 2.0s aren't making as much power as they thought, but as far as I know, no one has a fully tuned 2.0
And if you're rebuilding the motor anyways, it's only an extra $500 or so for the crank (the pistons have to be spec'd for the extra stroke though)
$500 for 30+ HP (minimum) and spoolup 350 RPM sooner, that's a bargain
07-01-2003, 11:46 AM
#24
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A large turbo and a not-so-large turbo can run the same boost...
one will just have lower intake temps, but at the expense of spool up.
It's all give and take, but I still don't think it's worth 50-75hp more.
It's all give and take, but I still don't think it's worth 50-75hp more.
07-01-2003, 11:50 AM
#25
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Those are terrible maps....
Who rates airflow in terms of HP? Pressure ratio in terms of boost?
What is the displacement? Volumetric efficiency? Inlet and outlet pressure drop?
They're worthless maps, probably created by the marketing department.
What is the displacement? Volumetric efficiency? Inlet and outlet pressure drop?
They're worthless maps, probably created by the marketing department.
07-01-2003, 08:42 PM
#27
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We made sure that these injectors are high impedence before we bought them...
not sure why it's not listed on their sight. Since we already have the injectors, I'll need to call them to double check.
07-01-2003, 08:45 PM
#28
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Well, the chip we are currently running is a modified MTM/Dahlback chip...
this is pushing 25 - 27 psi through the stock turbo (K04 - 023). We plan on using this chip and seeing how it will respond. So, our starting pressures will be much higher than the 18psi mentioned.
07-01-2003, 08:50 PM
#29
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John, thanks for the reply...actually, I've been reading your past post as I noticed
you are running a SplitSecond MAP controller.
As I mentioned above, we'll be boosting much higher. I assume becuase of the increased efficiency of the turbo, as compared to the K04, we should see some pressure drop.
Here is a VAG run of the MTM/DBR chip:
<img src="http://pictureposter.audiworld.com/24538/red_intake_377_image001.jpg">
You'll notice how this chip responds to the car, and the boost command levels, as well as air flow (g/s). How do you think this will change with the turbo?
As I mentioned above, we'll be boosting much higher. I assume becuase of the increased efficiency of the turbo, as compared to the K04, we should see some pressure drop.
Here is a VAG run of the MTM/DBR chip:
<img src="http://pictureposter.audiworld.com/24538/red_intake_377_image001.jpg">
You'll notice how this chip responds to the car, and the boost command levels, as well as air flow (g/s). How do you think this will change with the turbo?