I currently have a t3/t4 50 trim .63 a/r. I put down 180whp 152wtq at 6 psi. However i hate the lag. I dont get full boost until 4.5-5k rpm. I have to down to 4th to past on the highway ops: Theres a local guy selling a t25 with a t3 flange and im thinking about getting it. I rarely drive over 3k so I feel that the t3/t4 is overated. For those that have a t25 turbo, what rpm are you getting full boost. Im looking for a fun turbo to drive with since its my dd.

my turbo


t25

 

RED -> 6 psi
GREEN -> 10psi but maxed out my stock fuel pump so we shut her down after 5.8k

 

If you only want around 180whp, I would absolutly go for a T25 on the sohc. It will be much more fun on the street for you 6psi is not even in the efficency range of that turbo anyway I dont believe

 

im shooting for 250 daily driven, rarely over 3-4k rpm. I mostly travel on the highway, I feel the t25 will be more efficient

 

If you want to trade for mine, my offer still stand. Just let me know so I can go grab it. It's at my cousin's house. But with the t25 you'll need at least 15 psi to get close to 250whp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by da_dude &raquo;</TD></TR><TR><TD CLASS="quote">If you want to trade for mine, my offer still stand. Just let me know so I can go grab it. It's at my cousin's house. But with the t25 you'll need at least 15 psi to get close to 250whp. </TD></TR></TABLE>
which turbo are you talking about... btw im thinking about picking up that a6 motor with the rod and piston, what do you think?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blue_hatch &raquo;</TD></TR><TR><TD CLASS="quote">
which turbo are you talking about... btw im thinking about picking up that a6 motor with the rod and piston, what do you think? </TD></TR></TABLE>

My t3/t3 50 trim /w the .48 ar turbine. But if you are planning on getting that A6 block with rods and pistons than stick with your current turbo right now.

 

My 50 trim T3 made 230 at the wheels and is a great daily driver turbo. Builds boost at 2500rpm. Feels like I am driving a big NA motor. Rev to 7800 on track days, 7500 on the street.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blue_hatch &raquo;</TD></TR><TR><TD CLASS="quote">im shooting for 250 daily driven, rarely over 3-4k rpm. I mostly travel on the highway, I feel the t25 will be more efficient</TD></TR></TABLE>

If you want in the 250ish range on a stock motor, or if you get a built A6 motor, you're going to want to keep the 50 trim.

 

personally, id rock a t3 .42/.48 you will be able to use your current manifold and will see quite faster spool

with my .42/.48 60 trim, i made 12psi by 3300rpm

 

IMO, theres something wrong with your setup. I was hitting 8psi by 3500rpm with my 57 trim, .63 a/r on my turbo D.

 

my .50 trim makes 20psi @5500 on my b16....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Unsivil_audio &raquo;</TD></TR><TR><TD CLASS="quote">IMO, theres something wrong with your setup. I was hitting 8psi by 3500rpm with my 57 trim, .63 a/r on my turbo D.</TD></TR></TABLE>
That seems a bit early. My 57 trim doesn't hit 15psi until around 5300 on my z6. My roomates b16 does 9psi around 5000 with the same turbo. Although i did tune a y8 the other week that was hitting more boost than me around 4300

 

I know it is. My b16 turbo had a .48 a/r 50 trim and and it didn't spool nearly as fast either (like full boost at 5.5k). But I swear it did.

However, I was running 3" open downpipe on my turbo d setup and a 2" downpipe on my b16 through a full exhaust. Other differences to note is that my turbo d had a ching-chong turbo, whereas my turbo B had a Garrett.

 

im hoping to get quick decent spool also. i got the same turbo specs as the OP. mine is a garrett T3/T04E. as long as i hit full boost by 4k, ill be happy with that. im working on a stock internal LS motor, going for 250 to 275 whp.

 

Look into the Super 60 or the T3 .42/.48 because with either one of those turbos, you'll be able to use your existing manifold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">Look into the Super 60 or the T3 .42/.48 because with either one of those turbos, you'll be able to use your existing manifold.</TD></TR></TABLE>

is the super 60 a 60 trim turbo? and is the super 60 and 60-1 the same turbo?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jay Dee Emm &raquo;</TD></TR><TR><TD CLASS="quote">

is the super 60 a 60 trim turbo? and is the super 60 and 60-1 the same turbo?</TD></TR></TABLE>

The super 60 is a 60 trim T3 compressor whereas a T3/T04e 60 trim is a T4 compressor. The 60-1 also uses a much larger compressor wheel. The Super 60 is significantly smaller than either of those.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">

The super 60 is a 60 trim T3 compressor whereas a T3/T04e 60 trim is a T4 compressor. The 60-1 also uses a much larger compressor wheel. The Super 60 is significantly smaller than either of those. </TD></TR></TABLE>

Will a super 60 fall flat early before redline? Im talking 7k LS redline. Or will it depend on the size of the turbine a/r.

 

T3 Super 60 .63ar should be fine for your goals. Falling off before redline is a product of two things: the turbine housing being to small and literally choking OR the turbo being to small for your goals; therefore, if you were to map the engine's needs on a compressor map, your full load needs would be off the right side of the map. In a nutshell that means that your engine requires more air than the turbo can give and boost pressure drops (since its a measure of resistance through the engine)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">T3 Super 60 .63ar should be fine for your goals. Falling off before redline is a product of two things: the turbine housing being to small and literally choking OR the turbo being to small for your goals; therefore, if you were to map the engine's needs on a compressor map, your full load needs would be off the right side of the map. In a nutshell that means that your engine requires more air than the turbo can give and boost pressure drops (since its a measure of resistance through the engine)</TD></TR></TABLE>

Good info. Dont wanna seem like Im trying to jack the OP's thread, but I actually was thinking about purchasing a Garrett T3/T04E 50 trim .63 a/r just like his for my stock internal 275 goal LS motor for my 93 EG. I too am a big fan of that combo of quick spool and power to redline. The super 60 .63 may be the trick for him AND me.

 

Is your WG Possibly staying open slightly? Maybe some leaks causing you lag...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4thgenhtch &raquo;</TD></TR><TR><TD CLASS="quote">Is your WG Possibly staying open slightly? Maybe some leaks causing you lag...</TD></TR></TABLE>

After reading your post, you may be on to something. A 50 trim should spool faster than my GT3255b (effectively a 57 trim) and i see full boost no later than 4k on the street. A 50 trim should be at full tilt by 3500rpm or so.

 

After a boost run today... full boost is at 3.8-4k rpm. Im probably gonna keep this turbo since I have other plans up ahead.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">

After reading your post, you may be on to something. A 50 trim should spool faster than my GT3255b (effectively a 57 trim) and i see full boost no later than 4k on the street. A 50 trim should be at full tilt by 3500rpm or so. </TD></TR></TABLE>

this is for a d16 btw

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">

A 50 trim should be at full tilt by 3500rpm or so. </TD></TR></TABLE>

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