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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-27-2016, 06:14 PM   #1
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Default This turbo too big for 1.8?

I think this will be way too big for my goals- but how far off a smaller t3 will this be spool wise. really only looking for 250- 275 whp from a 1.8



anyone ever use one of these?

I picked this up for my integra but was wondering if it would do decently well on a 1.8 BP? Looking for decently quick spool for track and autox

copied from their site- came with the 63 ar, but would definately sawp to the 48


Boost Lab T3/T4 57 Trim Turbocharger Boost Lab T3/T4 57 Trim Turbocharger. This turbo features the popular 57 trim compressor wheel and stage 3 turbine wheel. Choice of T3 .48 or .63 A/R T31 (2.5") 4-bolt discharge turbine housing. Standard T04E 2.5" Inlet / 2" Outlet compressor housing. Identical to the Garrett 57 trim, this turbocharger is extremely common in a wide variety of 4 cyl applications up to 450hp.The Boost Lab T3/T4 57 Trim is assembled and balanced in-house and comes with an industry standard 1 year unlimited mileage warranty.
This unit is usually in stock and ships in 1-2 daysSpecs:Compressor Housing: 2.5" In / 2" Outlet

Compressor Wheel: 56.60mm inducer / 75mm exducer 57-Trim

Turbine Housing: T3 .48 or .63 A/R T-31 (2.5") 4-Bolt Outlet

Turbine Wheel: 56mm inducer / 64mm exducer 76-Trim Stage 3 Turbine Wheel




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This turbo too big for 1.8?-80-20150827_101213_56283_zoom_604cdf4a361182fb9f43446451616226491c9780.jpg   This turbo too big for 1.8?-80-20150827_101113_44498_zoom_66f8233a08b85582e3f55fd80242ac75295e3530.jpg   This turbo too big for 1.8?-80-20150827_101158_98542_zoom_5da22f01fe61e63fc13702d0879f8ff4906fcb5e.jpg  

Last edited by mr steve; 05-27-2016 at 07:13 PM.
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Old 05-27-2016, 08:18 PM   #2
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Its not too big to work, but it will be a hell of a ride. Id expect power to come in late and HARD. And not MSM late, big power 1jz late.

Dann
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Old 05-27-2016, 08:37 PM   #3
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The single most important number when it comes to turbo sizing is the compressor exducer. You can get a rough estimate of how a turbo will respond by comparing the size of the compressor exducer between turbos. It is not an exact science, but it will put you into the ballpark.

Small turbos are things like the GT2554R (53.9mm), GT2560R (60mm), and EFR6258 (62mm). Medium turbos are things like the Disco Potato (60mm), GTX2863/2867 (63mm and 67mm respectively), and the GT2871R (71mm). Large turbos are anything larger than 71mm. Yours is a 75mm, which is huge.

Turbine wheel inducer size generally follows compressor wheel size, and it can be a good indicator as well, although turbine area ratio (A/R) can make it a little confusing. Garrett's GT2560 is a 53mm turbine. The GTX2863 is a 53.9mm turbine. The EFR6258 and 6758 both use a 58mm compressor exducer. Those are all small/medium turbos. Garrett's T25-turbined 3071R is a 56.5mm exducer, and their true 3071R is a 60mm exducer. Yours is a 64mm inducer (the inducer is always larger on the turbine, your data sheet is a typo), which is not going to spool nice.

Your T3 is somewhere between a 3076R and a 3576R. That's enough turbo for around 450-500whp with the right supporting mods. It's not going to spool well, at all, ever. When it does spool, it will feel less like a turbo and more like nitrous.
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Old 05-27-2016, 08:41 PM   #4
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Thanks for the replies guys. I had thought I saw guys doing ok spool wise with a 50 trim, good to know this wont work. Guess I'll have to sell or see if the shop will exchange with me
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Old 05-28-2016, 12:04 AM   #5
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why did everyone stop using the mitsu turbo's?
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Old 05-28-2016, 01:06 AM   #6
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When 4 bolts in a nice rectangular shape became popular. And when garret declared a 5 bolt downpipe as the norm.
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Old 05-28-2016, 01:18 AM   #7
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Quote:
Originally Posted by mr steve View Post
why did everyone stop using the mitsu turbo's?
when greddy stopped making kits for miata's
back in the 90's
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Old 05-28-2016, 09:10 AM   #8
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Quote:
Originally Posted by 18psi View Post
when greddy stopped making kits for miata's
back in the 90's
This is not true. The td05 from the evo viii or ix works perfect with the 1.8, it outflows gt2560r with much better spool times.
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Old 05-28-2016, 09:29 AM   #9
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Quote:
Originally Posted by gianic View Post
This is not true. The td05 from the evo viii or ix works perfect with the 1.8, it outflows gt2560r with much better spool times.
Wouldn't you just get an EFR 6258 then? Again, your DSM turbo haz zero support from manufacturers, to buy a manifold or downpipe.
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Old 05-28-2016, 10:07 AM   #10
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I'm confused. I used to own an evo3 16g 'd DSM and it bolted right up to same manifold my t25 came off of.

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Old 05-28-2016, 10:28 AM   #11
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Quote:
Originally Posted by mr steve View Post
I'm confused. I used to own an evo3 16g 'd DSM and it bolted right up to same manifold my t25 came off of.
And the downpipe? What pattern did it have? Get some pics.
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Old 05-28-2016, 11:33 AM   #12
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Quote:
Originally Posted by ryansmoneypit View Post
And the downpipe? What pattern did it have? Get some pics.

I dont think i still have the pics it was 10 yrs ago. The DSM's came with an o2 housing between the t25/16g and downpipe.
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Old 05-28-2016, 02:36 PM   #13
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Quote:
Originally Posted by mr steve View Post
I dont think i still have the pics it was 10 yrs ago. The DSM's came with an o2 housing between the t25/16g and downpipe.
What we are trying to say is that some DSM turbos may have a t25 inlet flange, but none have the correct output flange that all the downpipes work with.
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Old 05-28-2016, 03:19 PM   #14
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Quote:
Originally Posted by gianic View Post
This is not true. The td05 from the evo viii or ix works perfect with the 1.8, it outflows gt2560r with much better spool times.
umm...

the evo9 td05 isn't outspooling the 2560 unless you run it in proper twin scroll config....which is not apples to apples comparison.

.......unless you want to show me a current plot of a evo9 turbo on a miata log mani making peak torque before 3500.

any turbo can fit any engine. The discussion here is about convenience and parts availability
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Old 05-28-2016, 08:59 PM   #15
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Of course you keep the twin scroll for the above spool benefits and of course we are talking about custom manifold and downpipe solution.
There were though a company that manufactured twinscroll manifolds and downpipes for the miata but I don't remember their brand...

On my previous setup (I now have a turbo NC) I was shooting 30psi with this little beast and it was a blast to drive. Far better than my previous 2560 and 2871 setups.
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Old 05-29-2016, 09:19 AM   #16
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EFR and win
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Old 05-29-2016, 01:23 PM   #17
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Quote:
Originally Posted by Mazdaspeeder View Post
EFR and win
Can i borrow some $$$ ?
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