Which turbo is better?

[tvmendoza]

Hello, i have a manifold with flanges for t3 and t4, and i am planning to buy my turbo this week, and i between a t3 and a t3/t4:

The t3 have this specs:COMPRESSOR WHEEL SUPER STAGE IIITURBINE HOUSING A/R .48COMPRESSOR HOUSING A/R RATIO .42OIL COOLED.50 trim

The t3/t4:T3/T4 T04"E" hybrid. 50 A/R COMPRESSOR .63 A/R TURBINE.57 TRIM5 BOLT EXHAUST FLANGE

So what is the best choice and is it the t3/t4 going to fit on my mani, or should i wait until the T4. ( right now i am only missing the turbo and the intercooler to be a ka-t)

[DRIFTEADOR]

best for what

[hannibal]

Your manifold is flanged for T3 or T4 turbines. Both the T3 you listed and the T3/T4 use T3 turbines. (T3/T4 means T3 turbine with T4 comperssor.)

With that said, that T3 is pretty small. It probably comes from a 2.0L Saab. It would have a hard time making over 250-260whp.

So it depends on your goals. But I'd bet the T3/T4 would be more useful.

[tvmendoza]

oooooh that is exactly what i wanted to know. Also is a hybrid turbo hard to install and is the t4 better than the t3/t4( i am imaging that it is).

[hannibal]

No, a T3/T4 hybrid isnt any more difficult to install. It comes assembled, so there nothing extra to do.

A straight T4 (T4 compressor and T4 turbine) is great for major power. It will have more lag than a hybrid, due to the larger T4 turbine. The bigger turbine requires more exhaust flow to get it spinning. T4's are often used on single turbo V8 (I think), so its a little big for a 2.4L 4cylinder. Stick with the T3/T4 hybrid. There are guys making 350+whp with this kinda turbo. Check out KA-T.org and click on the names on top. Duron and Foster (fiznat, a moderator of this forum) are making over 400whp with the T3/T4.

What are your power goals??

[wild_maxx]

[QUOTE=Both the T3 you listed and the T3/T4 use T3 turbines. (T3/T4 means T3 turbine with T4 comperssor[/QUOTE]

thats very useful info. i wasnt quite sure on that, are t3 and t4 mounting flanges the same?

[tvmendoza]

i am not quite sure but i will say 350, when i get enough money to buy larger injectors and fuel pump etc.Right now i am planning to run just with a fmu

[tvmendoza]

oh i forgot what is the meaning of hybrid???(i thought that it was water cooled).

[Checkered-Member]

oh i forgot what is the meaning of hybrid???(i thought that it was water cooled).

Definitions of hybrid: noun: a composite of mixed origin

basically since the turbine is of a T3 turbo and the compressor is off a T4 turbo, its makes the T3/T4 a hybrid

[themadscientist]

thats very useful info. i wasnt quite sure on that, are t3 and t4 mounting flanges the same?

no, T3 is rectangular, T4 is almost square

[tryiian]

Your manifold is flanged for T3 or T4 turbines. Both the T3 you listed and the T3/T4 use T3 turbines. (T3/T4 means T3 turbine with T4 comperssor.)

With that said, that T3 is pretty small. It probably comes from a 2.0L Saab. It would have a hard time making over 250-260whp.

So it depends on your goals. But I'd bet the T3/T4 would be more useful.

would this turbo spool quickly (like stock sr fast, mentioning which, how bout a BB t28?) at around 250 whp and not stop flowing up top? or is the t3/4 frankenbooster better for that?

[hannibal]

Smaller turbo = faster spoolSmaller turbo = less top end performance

Its a compromise. You can use a huge turbo that wont boost until 5000rpm. Or you can use a tiny turbo that boosts from 2000rpm, but drops off above 5000rpm.

Ball bearings are great for quick spool. Thats why the BB Garrett GT turbos cost so much. Theyre the best of both worlds.

I guess the T3 mentioned above would have more lag than a BB T28. SR guys hit 250whp with the stock turbo, so the turbo is capable of it. If youre going for 250whp with quick spool, I dont think you can beat the T28 with ball bearings. The T3 might do better up top, but would have slightly more lag. Either turbo is going to be past its max efficiency at 6000+rpm. Its a tough call

mendoza, if you eventually want 350whp, I'd definitely go with a T3/T4.

[hysteria]

i have the same straight t3 with .48 and .42. on a kat and my brother has the s14 sr with t28. i'd say that the lag is very comparable and is next to nothing in both cases. however i get TERRIBLE gas mileage because it just freaking spins all the time and gives my mafs an incorrect signal because i'm running an rrfpr setup. another thing is that my setup is at 8 psi right now. with this turbo i would not be able to turn up the boost even if i upgraded my fuel management because this turbo just won't do it. someone posted up a compressor map for this straight t3 turbo recently... search for that if you want more info. if you want to keep the turbo and not have to worry about upgrading it or replacing it for a long time get the t3/t4... on the other hand though i love the way my car runs, just hate the gas mileage... but when i got this turbo i always had the intention of getting something more capable later.

[Jookmasta]

altho i myself have a str8 T3, i would say go for the hybrid since the specs for that T3 u listed make that turbo quite tiny. If u want a str8 T3, i would only suggest the super 60 T3. Any other T3 (like the one you listed) will give you a barrier as to what psi u can run. Go with the hybrid.

[Florida240sx]

Anyone remember specs on IAP's?

[get_up_mark]

both choices use the same t3 flange however if you went with the straight t4 then ud need the flange on ur other manifold. the t3/t4 hybrid seem to work great with our car with quick spool times and no power decreases in high rpms