Alright, ive been learning on this board for a couple months now and I never felt the need to post since I found an answer to every single question I had using the infamous "search". Except this one:

I want to know what T3/TO4e trim is the best for ME. My engine is a stock b18b, my setup is mainly for street use. I plan running 6-8 psi of boost and upgrading to 10-11 psi as soon as I can afford fine tuning.

Outcome of my searchs:

Most vendors recommended me a 57 trim w/ .48 a/r.
Many users recommend 57 trim w/ .63 a/r
And some "Turbo gods" recommend 50 trim w/ .63 a/r

I am quite lost and would like to know wich trim and a/r. would give me the best powerband. (less lag and power to the redline and a little more). Keep in mind 12 psi is the max I would push.

-Tx

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vega &raquo;</TD></TR><TR><TD CLASS="quote">Alright, ive been learning on this board for a couple months now and I never felt the need to post since I found an answer to every single question I had using the infamous "search"
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You should be a role model to all honda-tech n00b's

Anyhow to the topic. I would go with 57 rim, a/r well .48 is going to spool quicker than a .63 but you wont have as much top end as the .63

Imo with with a t3/t04e 57 trim .63 a/r the rpms move so fast in all honestly theres no issue as far as lag. Another thing to remember the .63 will help with traction compared to its smaller counterpart.

 

The T3/T04E has many different sizes. Remember that there are many different size wheels to those a/r's. Stage 1, 2, 3, 5 H, O ,P trim wheels will also determind hp and other factors such as spooling. Try asking Camp1320. He specializes in the t3/t04e set ups.

 

I'd say even smaller than a .50. Definately not a .57.

I say: T3 Stage3/.63 and T04E .46-trim

 

to4e .50 cold ar.48 hot 57 trim is a good street turbo i think a 63 will be to laggy and no fun for a light to light street car oh yea i got the perfect 1 for sale

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quikB18B &raquo;</TD></TR><TR><TD CLASS="quote">

Imo with with a t3/t04e 57 trim .63 a/r the rpms move so fast in all honestly theres no issue as far as lag. Another thing to remember the .63 will help with traction compared to its smaller counterpart.

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How would a .63 help traction? Smooths boost peak? Big diff in traction?

I decided after your answers and re-reading all archives that i would go with the 57 trim .60 a/r Compressor but i'm still hesitating between the .48 and .63 turbine. One thing is sure, it's gonna be a stage 3 wheel.

One last thing, could someone tell me details like around what rpm ide get full boost and if i would still hold it at the redline (6800)? for the .48 and .63? All that @ 8-10 psi. I can't really figure it out since the only turbos i have driven are a small 16g and 20g on a dsm.

-Tx


Modified by Vega at 4:07 AM 12/10/2003

 

the .63 a/r will take longer to spool and pull all the way to redline, rather than the .48 a/r will spool sooner and you might lose top end power.

 

ok so why is And some "Turbo gods" recommend 50 trim w/ .63 a/r over a
57 trim w/ .63 a/r?

 

&lt;-- 60 comp a/r 57 trim, .63 exhaust a/r stg 3 wheel...

300whp 270 tq 12.5 psi

i think at 7 lbs i made like 240 whp or so, i forget the torque, somewher around 210-220

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rocket256 &raquo;</TD></TR><TR><TD CLASS="quote">ok so why is And some "Turbo gods" recommend 50 trim w/ .63 a/r over a
57 trim w/ .63 a/r?
</TD></TR></TABLE>

https://honda-tech.com/zerothread?id=580579

And thanks for your setup examples, that helps lots.

 

I usually recommend the 50 trim wheel over the 57 for it's broader range of efficiency, smaller inducer/larger exducer for better response and higher peak efficiency (78% vs 76%). For good top end power and decent spoolup, I like the T3/T04E50 stageIII .63... and if you have the extra $$, ball bearing.

If all you want is quick spoolup/good midrange, a good stoplight to stoplight street car and some nice power for the low boost you'll be pushing (no more than 12 psi), go with a T3/T04B superS stageII .48.

 

k, im tired, but i think i got it right. If not slap me.

1-50 trim (47 lbs/min) and .63 a/r quick spool, high peak power
2-57 trim (49 lbs/min) and .48 a/r quick spool, low peak power
3-57 trim (49 lbs/min) and .63 a/r lag, high peak power

#1 and #2 should put down about the same power @ 10psi and #3 will give me best numbers but lag.

Modified by Vega at 6:03 AM 12/10/2003


Modified by Vega at 6:05 AM 12/10/2003

 

i wouldnt go for the stage III, id go for a basic stage I.

 

the stage indicates the size of the exhaust wheel, like how the trim tells the size of the compressor wheel. if you want quick spool up dont go with a stage III wheel.

 

i know i could get much faster spool with smaller turbos/wheel, but not as much flow as a t3/t04e stage 3


Modified by Vega at 6:59 AM 12/10/2003

 

if ur going to be running a stock LS id go with a t3/to4E 50 trim w/.48 ar. good spool up and a great powerband for the street. u should be looking for a "usable" powerband. dont get star struck by peak numbers. an engine making lets say 260 whp from 5k to 7k will be faster than an engine making 275 whp from 6k to 7k (just an example no freaking out with crazy posts please). i have a buddy who has this exact turbo making 266whp and 238 ft lbs @ 10 psi. this is on a bone stock engine i.e. bought from junkyard on monday with 113k on odometer on tuesday swaped into 91 hatch. on friday built turbo kit. street tune then dyno tune to numbers u see above.

 

i would go with a 50 trim .63 a/r myself. stage III wheel .63 a/r is overkill.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TS engineering &raquo;</TD></TR><TR><TD CLASS="quote">if ur going to be running a stock LS id go with a t3/to4E 50 trim w/.48 ar. good spool up and a great powerband for the street. u should be looking for a "usable" powerband. dont get star struck by peak numbers. an engine making lets say 260 whp from 5k to 7k will be faster than an engine making 275 whp from 6k to 7k (just an example no freaking out with crazy posts please). i have a buddy who has this exact turbo making 266whp and 238 ft lbs @ 10 psi. this is on a bone stock engine i.e. bought from junkyard on monday with 113k on odometer on tuesday swaped into 91 hatch. on friday built turbo kit. street tune then dyno tune to numbers u see above.</TD></TR></TABLE>

 

Good to see a fellow Canuck getting into FI. I am pretty much in the same boat as you. I have a 2000 ls and I'm in the process of putting a kit together.

Unfortunately, I'm not knowledgeable to help you decide but if/when you start buying pieces, let me know if you find any good place within Canada to buy. I would much rather buy here than pay for shipping, duty, tax, brokerage fees......

 

don't mean to jack your thread but....does anyone know how laggy a t3/60-1 w/ a .48a/r turbine would be? on an LS?

 

I am running a 60 trim comp. housing, 60 trim wheel, 63 a/r exhaust housing, stg.3 exh. wheel on my bone stock LS. As soon as I get my ecu back from hondata, I will rell you how he runs and how bad lag is.

 

I always liked this dyno to show differences between the .48 and .63 ar


My vote is 50 trim with .63 exhaust ar.

 

What compressor housing is that comparison graph showing?

Awsome comparison indeed!

My Vote:

50 Trim with .63ar.

If you compare the compressor maps of the 57 and 50 trim, you will find that the 50 trim is better in terms of efficency from 5psi all the way up to 30psi. The downside is that the 50 trim doesn't flow as much per PSI...however, many people have seen the 50 trim push 500hp.

Definetly the 50 trim!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ELSpool &raquo;</TD></TR><TR><TD CLASS="quote">I always liked this dyno to show differences between the .48 and .63 ar


My vote is 50 trim with .63 exhaust ar.</TD></TR></TABLE>

I just do not buy this. JON @ dropshop made a wonderful powerband at 11psi and over 265whp with his .48 a/r. There are people making those same numbers at 11psi with a far less broad powerband using a .63 a/r. The graph shows the favoring of high RPM with a .63 a/r turbine housing. It is not entirely applicable as it does not directly correlate with our motor's VE, RPM, or flow. It does provide a decent insight as to what changing the housing does, but it overdramatasizes the effect and gives a false impression as to how much power will be gained imho.

 

I heard and read some guys switch from .48 to .82 ar and gaining upwards of 60whp at the same psi level. Take what you want from, it's just a tool to see how it affects a power curve.