mymeatb18"

im fairly new to turbos and i have a garret t3/to4b ar. 60/100. i believe that the back housing is too big for what i want (conservative ls on boost). is there another back housing i can put on this turbo maybe make it a straight t3?

thanks in advance

mymeatb18"

bump somone help me out

mymeatb18"

bump

under_boost

well, the fact you call your turbo a t3/t4 would mean you have a t3 wheel. be it a stage 1-5, it's anybody's guess. so yes, you can easily swap on a smaller t3 housing. figure out which turbine wheel you have by measuring the inducer/exducer.

HiProfile

Are you sure its a hybrid? Its uncommon to find a t3 turbine housing (dark-colored side) with an AR of 1.00, although you can find 1.00 T4 turbines fairly easy - big diesil's used them, such as tractors, and had no need for spool characteristics, just flow.

Look around for flange bolt spacings, and you can find out if thats a t3 or t4 turbine.

mymeatb18"

i said it was a t4 back housing not t3. what is and how do i measure the inducer/exducer

poop II

93
Your post remains confusing. It seems that you have a .60 a/r housing(is the inlet 2.75" or 3"?). I'm not sure where you are getting the 100 from as there is no 1.00a/r compressor housing that I am aware of.. Maybe it's marked 60/100 for some reason; makes sense though. If the 100 is on the turbine, the only 1.00a/r(exact) housing is a divided to4. To measure the ind./major diameters you need to remove the comp housing, but you can roughly measure the inducer size through the inlet to get an idea of what wheel you have. If you indeed have a to4b comp wheel the inducer measurements are as follows: s trim- 48.4mm, v-55.4, h-58.4.
93 93/93

mymeatb18"

well the back housing has a big a/r 100 on it so i dont know bro. the plate on the back of the t3 housing says to4b on it so seems pretty right to me.

so when i go to buy a t3 back housing which one specificaly should i be looking for using the measurements that "poop II" provided

under_boost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mymeatb18" &raquo;</TD></TR><TR><TD CLASS="quote">well the back housing has a big a/r 100 on it so i dont know bro. the plate on the back of the t3 housing says to4b on it so seems pretty right to me.

so when i go to buy a t3 back housing which one specificaly should i be looking for using the measurements that "poop II" provided
</TD></TR></TABLE>

with the inducer/exducer measure on the turbine wheel, you can tell the shop the measurements and they will let you know what stage wheel you have. then it'll be up to you on what turbine housing based on your goals that you select.

mymeatb18"

well all im really aiming for is 300 if i make a little less fine if i make more then cool.

so i get the measurements and go to this "shop", what shop are you referring to?

HiProfile

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mymeatb18" &raquo;</TD></TR><TR><TD CLASS="quote">well the back housing has a big a/r 100 on it so i dont know bro. the plate on the back of the t3 housing says to4b on it so seems pretty right to me.
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mymeatb18" &raquo;</TD></TR><TR><TD CLASS="quote">i said it was a t4 back housing not t3. what is and how do i measure the inducer/exducer</TD></TR></TABLE>

Just so you know, you have your termenology all mixed up. T3 and T4 are designations for a turbo size class, not for parts of a turbo. A center housing (chra) for a T3 is a different size/design than one for a T4, a T3 'hotside' (turbine) is different from that of a T4, and the T3 'coldside' (compressor) is different from a T4.

If the black iron side of the turbo has the 4-bolt inlet flange of a T4 (you'll have to measure it) and your silvery side has 'T04B' on it, its a straight T4 turbo. To make it a t3/t04b you need a T3 turbine housing, T3 turbine wheel, and a T3 center housing, and then mate them to the t04b backplate, comp wheel, and comp housing, then have it all balanced.

BTW you measure inducer with a ruler, caliper, etc. The inducer is where gasses first touch the wheel - the smaller diameter of the compressor wheel and the larger diameter of the turbine wheel. You can find pictorial walk-throughs of how to do so all over the interweb.

mymeatb18"

ok thanks for clearing that up so then i have a straight to4b. so with that i can still change the turbine housing right? so what im looking for is a turbine housing with a smaller ar?
im looking for some decent spool time, i would like my turbo to spool up at around 4000rpm.
i've heard that this turbo would begin to spool up at 5000

mymeatb18"

bump

HiProfile

lol, 4k with a T4-anything - it will take more than 2.0L of displacement and a prayer to do that.

Depending on your motor (fill us in) and the actual compressor wheel, a t3/t04b will spool up (full boost) between 3500-5500 rpm. A straight t04b, even with the smallest turbine wheel and proper dual scroll setup running the .58ar divided T04 exhaust housing, you're looking at 5500 minimum (to make *any* boost) on a 2.0L. I'm not making fun of you, just letting you know a straight T4 is for SFWD drag cars and supras.

To make it spool at a reasonable time, you'd have to make it a t3/t04b, meaning a t3 turbine shaft/wheel, a t3 center housing, and a t3 exhaust housing, and then a rebalance. It would be the same money to get a pre-made t3/t04e, and you'd end up with a better compressor wheel anyway. You could use part of a junkyard T3, but even then the time spent on getting a good one and sending it all out, you could have found a deal on a new t3/t04e.

I hope that didn't dampen your spirts that much.