Drifto's Twin Scroll HTA3076 E85 33psi
Jul 5, 2013, 12:05 AM
#64
Thanks for the link. We can't make an apples to apples comparisons here, as there are too many significant differences between the two setups.
For starters, a 2.3L is always going to spool considerably quicker than a 2.0L, and generates more power in rpm ranges where this mid-sized turbo is most efficient. The torque curve illustrates this, and is one reason why peak power occurs at 6k rpm and begins falling thereafter.
An FF setup offers greater power potential simply because it allows one to eliminate short radius bends and other issues that plague the compacted 'pretzel' factory design. Any setup with a turbo larger than factory and a decent cam set will pick up power with an FF manifold setup.
And there are other differences between these two engines, like SCR, cam duration, boost pressure, etc.
For a 2.3 on steroids, I would fit the largest divided T4 I could muster. For a 2.0L engine however, one will get best possible spool and still put 600whp (DJ) within reach with a 1.06 T3. If one is aiming for >600whp, an HTA3582 is a better option.
For starters, a 2.3L is always going to spool considerably quicker than a 2.0L, and generates more power in rpm ranges where this mid-sized turbo is most efficient. The torque curve illustrates this, and is one reason why peak power occurs at 6k rpm and begins falling thereafter.
An FF setup offers greater power potential simply because it allows one to eliminate short radius bends and other issues that plague the compacted 'pretzel' factory design. Any setup with a turbo larger than factory and a decent cam set will pick up power with an FF manifold setup.
And there are other differences between these two engines, like SCR, cam duration, boost pressure, etc.
For a 2.3 on steroids, I would fit the largest divided T4 I could muster. For a 2.0L engine however, one will get best possible spool and still put 600whp (DJ) within reach with a 1.06 T3. If one is aiming for >600whp, an HTA3582 is a better option.
Jul 5, 2013, 09:51 AM
#65
Normally I'd say forget about the T3 divided stuff. The new T3 divided housings from Garrett though are supposed to be up on flow compared to the old stuff. I don't know if it will match a T4 housings flow in this size range or not. But I bet it's smaller and lighter then the T4. It's also made of a better material.
If the goal is GTX3576R or smaller, I think the T3 divided might be a pretty solid choice now. It will likely hold you back past that turbo size though. The old T3 divided housing though diffinitely held back setups that would have otherwise breathed well. But the GT30 turbine holds back those setups anyway so it's kind of a match made in heaven, quick spool that requires a ton of boost to make power.
Who knows though, there aren't turbine maps out for the T3 (old and new) or T4 divided housings for the GT30/GT35 turbine wheels so it's really just an educated quess. I think a GTX3576R in a new T3 divided setup on a 2.3L would probably be a pretty wicked little street setup though.
If the goal is GTX3576R or smaller, I think the T3 divided might be a pretty solid choice now. It will likely hold you back past that turbo size though. The old T3 divided housing though diffinitely held back setups that would have otherwise breathed well. But the GT30 turbine holds back those setups anyway so it's kind of a match made in heaven, quick spool that requires a ton of boost to make power.
Who knows though, there aren't turbine maps out for the T3 (old and new) or T4 divided housings for the GT30/GT35 turbine wheels so it's really just an educated quess. I think a GTX3576R in a new T3 divided setup on a 2.3L would probably be a pretty wicked little street setup though.
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