kte324

iTrader: (2)

Has anyone used these turbos? Any feedback? They are reasonably priced at ~$599 on a few websites.

I plan on using it on semi-built (piston/rod) gsr looking for around 450whp. I searched and could not find any user reviews.

Here shows some information and pictures: https://honda-tech.com/forums/forced-induction-49/precision-turbo-entry-level-54mm-59mm-t3-t4-430hp-600hp-super-sale-%24599-2835667/

kte324

iTrader: (2)

anyone?

Gold DA9

ive seen them for sale havent heard or seen anyone running one yet.

racebum

i have the 5431b sitting right next to me. it's optimum at 300-350whp on a b18c, i'm sure 400whp is probably doable but turbos like the 6262 are much better suited to 450whp than this little 50 trim

wilham320

iTrader: (1)

i am running the 5431b... having surge issue, but not sure if it is the turbo yet. It is not a 50 trim though. It is a 54mm v-trim garrett with precision housings.

kte324

iTrader: (2)

I was thinking about the 59mm with the p-trim turbine.

racebum

i noticed the 54mm wheel, they listed the 5031e as also have a 54mm wheel yet referred to both as 50 trims

if you're having surge issues did you check the common causes like your blow off valve?

d112crzy

Compressor wheel inducer size != trim of turbo.

racebum

that's what i was always under the impression of as well.

maybe precision i avoiding the term since the 54 trim garett has such a bad rep

TheShodan

iTrader: (14)

Ummm. no. Compressor wheel inducer does not equal trim size. The trim size is simply the difference between the wheel inducer and wheel exducer diameters. You can have several turbochargers that have the same trim and yet have completely different power characteristics. Case in point, the 60 "trim" turbocharger is 58.2mm inducer (74.93mm wheel diameter), while the 60-1 compressor wheel is 59mm inducer with a different wheel design and a 76.2mm wheel diamater (Same diameter as a GT3076R, ironically).

But they both have the same "trim" size of 60.. Larger trim doesn't necessarily mean more power when the wheel diameter itself stays the same.

Trim is easily calculable.


In essence, the 54mm "introduction" turbo is basically what is commonly known as the "50 trim", about 49lbs/min (400whp max) which explains its relatively low cost.

wilham320

iTrader: (1)

the 5431b is not a 50 or a 54 trim. It's what garrett and bep call a "V-trim"...
power wise... they are practically the same.

to4e 50 trim= 6 blade 54mm / 76mm
5431b= 8 blade 54mm / 70mm

Blow off valve does not cause compressor surge at WOT...
I'm getting surge during spool up right around 10-12psi.

TheShodan

iTrader: (14)

That's Fine. But those V1/V2 turbocharger compressor wheels surged like hell after anywhere from 14psi-25psi (depending upon application) regardless of the exhaust wheel used (most were 65mm diameter stage IIIs). It didn't matter if they were in t04B or T04E configuration. Most DSMs that used this particular combination did experience hypersonic turbulence at those levels that the 50 trim didn't experience. (thank god for the 50 trim as a substitute for this wheel configuration)

From what I construed from the use of both of these wheels, it was mainly because of the size and design of the exducer towards the backwall of the compressor wheel in addition to the relative size of the exducer itself.

So, great. its even worse than I originally thought. It still explains the lower entry price level.

wilham320

iTrader: (1)

That's f'n sweet.. I just got this turbo to cure my surging problems of my last turbo. I origianlly bought the 50 trim, but precision ran out and started selling the 5431b instead, they told me it would be fine and not surge.

Maybe I can work something out with the place i bought it to upade to a 55/5758 or something.

TheShodan

iTrader: (14)

Good idea.

racebum

same thing here. ordered the 5031e and received the 5431b

if you google garett v trim there are a LOT of dsm guys using an offshoot of this. all i noticed had a 3 in front of their whp. didn't find any specific posts on surge though

wilham320

iTrader: (1)

add surge to your search... i found several dsm guys talking about the v trim downfall.
There was a post were BEP themselfs said it "has a VERY unforgiving compressor map"

I have no doubt in the power it makes, my d16z6 rips at 15psi with the 5431, more so than my last bigger turbo at 20, but I added a camshaft at the same time as the turbo, so that could cause th power diff.. I'm sure if i turned it up it could make 400, but it makes me cringe hearing and feeling the surge during spool up.

racebum

i did find a few guys who complained about surge above 12psi, no one really had issue under that in the threads i found at least. the odd part is some folks were spinning that V to 20psi with no issue. the only benefit this thing seems to have is it's small physical size. that's kind of cheese to develop a turbo that only behaves properly under 12psi

did find one interesting thread about this turbo. is this the same shodan?> look down toward the bottom of the thread

http://www.dsmtuners.com/forums/turb...y-money-2.html

hondatuner020

iTrader: (1)

i also have the 5431b sitting in my room, im looking for 300-325hp on my stock b18c1.. this post worries me though for its ability to push 400hp on e85 and a piston/rod combo

racebum

i haven't been able to pinpoint why some people have surge issues and others don't. so far i haven't found a single thread about surge under 12psi which will easily get your gsr to 300whp.

you're probably going to have to try it and see if you experience a bad surge or not. if you don't cool, if you do; stay at 300whp until you can afford a turbo upgrade.

i'm only planning on running mine at .6bar or roughly 9psi, the pissy part about it is spending $600 on a turbo that may be design limited

i'm just totally unsure. the 5031e used a 54mm inducer just like the 5431b, it just used the E cover. i'm not sure about other engines but on the b18c the 5031 never received any complaints i remember reading about

TheShodan

iTrader: (14)

Yes, this is the same v1/v2 style turbo that is being discussed. You must remember the cylinder head designs on DSMs are much less stout than the VTEC cylinder heads, in which surge may occur at lower pressure levels than with the DSM guys have experienced.

Racebum, you need to measure the inducers and exducer of your turbocharger to be sure of what you have, or post a pic if you're unsure.

TheShodan

iTrader: (14)

300-325, sure. but even the 50 "trim" turbocharger can barely do over 420whp on Hondas, so your work is cut out for you on the v1/v2 trim "5431".

racebum

has a 5431b sticker on the inlet. and is a .63AR

how dangerous is this thing on my type r with a goal of less than 320whp?

the ONLY video i found on a v trim B case is here, seems smooth in this application

http://www.youtube.com/watch?v=BZh7_CHp6QI

sik96teg

I have the precision 3431 turbo on my B18c5 motor. No issues at all with it. My garrett 57trim turbo started leaking oil pretty bad only after 3 monthes so i didnt wana spend a whole lot on another turbo. Im only at 11psi and no surge issues making about 315whp.

sik96teg

That turbo can get you to your power goals. You will need a really good tuner. I rebuilt my motor and put in forged pistons to ensure the reliability of my motor with the high comp. E85 is your friend if it is available in your area im not so lucky.

wilham320

iTrader: (1)

the 5431b and the 3431 are two completely different turbos...