M52b28 TURBO build looking for some tips

[okeefethechief]

Hi guys, Looking for help on deciding on a turbo for my upcoming build. Quick blurb

1998 m52b28
169xxx miles
to dos: s52 cams, cut ring and spacer, arp studs, and eventually a tune package with 60cc injectors and 93 octane obd, (via miller or rk tunes w/ blow through)
cooling system overhaul
pretty much refresh head, springs lifters guides etc.

my goal is a high revving/spooling drift motor with 400-500hp, wouldnt mind some room to grow but it isnt required.

I have found a few snails in my price range and im curious as to which would be perfect for my application.


https://www.full-race.com/store/borg...sx-7670-turbo/
https://www.full-race.com/store/gara...x-83-75-turbo/
https://www.full-race.com/store/garr...t3-60-1-turbo/

Concerns: i do not want too much lag. the sx 300 is rated for a 500hp+ motor and is known to be quick spooling, would this be overkill if i was to only run it at say 4, 450 hp? Would i be better off downsizing to the sx200 to maintain a better spool? I do not know much on the T3-60 only that its one of the best under 500 hp turbos (per many forums read) but not sure if its the one for my application.
Based on prices and figures im leaning towards the BW air works sx300 with a t4 twinscrool .91 ar. This would mount to my desired manifold http://www.sparktecmotorsports.com/th11228.html the easiest. However i am very new to FI, and if i sound like a fish out of water here please tell me, or if you think im also on the right track but need a few pointers, do not hesitate. Any info is greatly appreciated. Thank you for taking a moment to read.

[vollosso]

Id go with the borg s362sxe (6268). You should have 20psi before 4k and itll be overall a nice Setup.

Also check out 22rpd for the tuning.
www.22rpd.com/buildtunes.php

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[okeefethechief]

@vollosso thanks for taking the time to read and reply. It looks like my gut feeling was right about the sx300. The t4 is much easier to deal with mounting wise and the twin scroll is a huge bonus for the money. I am hoping to spread the project out over 2 years to save some cash and tuning will be towards the later end, that said i will happily take a look into 22rpd as i continue my research.

[vollosso]

@vollosso thanks for taking the time to read and reply. It looks like my gut feeling was right about the sx300. The t4 is much easier to deal with mounting wise and the twin scroll is a huge bonus for the money. I am hoping to spread the project out over 2 years to save some cash and tuning will be towards the later end, that said i will happily take a look into 22rpd as i continue my research.

Yeah the 62-64 can be had on the small exhaust wheel (68mm) and they spool great. Solid choice.


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[pbonsalb]

@vollosso thanks for taking the time to read and reply. It looks like my gut feeling was right about the sx300. The t4 is much easier to deal with mounting wise and the twin scroll is a huge bonus for the money. I am hoping to spread the project out over 2 years to save some cash and tuning will be towards the later end, that said i will happily take a look into 22rpd as i continue my research.

Twinscroll turbos are common and not really any more money than single scroll turbos. To get any advantage from the twin scroll turbo, you need a twinscroll manifold and the obx manifold you linked looks to me like a single scroll. Also, I am not sure any of the T4 SX300 turbos are fast spoolers on pump gas 400-500 rwhp cars.

I’d stay obd2 on the tune. Why change to obd1 for a miller tune?

[okeefethechief]

Twinscroll turbos are common and not really any more money than single scroll turbos. To get any advantage from the twin scroll turbo, you need a twinscroll manifold and the obx manifold you linked looks to me like a single scroll. Also, I am not sure any of the T4 SX300 turbos are fast spoolers on pump gas 400-500 rwhp cars.

I’d stay obd2 on the tune. Why change to obd1 for a miller tune?

I planned on staying obd2, miller offers both. and yes i overlooked that fact of the obx. It is more of a placeholder of what im looking for. What would you suggest?

[pbonsalb]

A twinscroll manifold is about $1500 which is pretty expensive and I don’t think worthwhile if cost us an object. I think they are great for street cars with big turbos since they will spool the big turbo faster. But if you don’t need a big turbo, and you don’t for 400-500 rwhp, you could get an open manifold and a faster spooling turbo. My old boostlogic with 0.82 t4 gt3582r was a great combination for an s52. Your m52 won’t spool as well.

There is a car a local turbo guru, butters stoch, built for another member, e36 meylo, and it is very fast and very reliable with an open spa manifold and an open journal bearing precision 6262 turbo with a small 0.63 turbine housing. Its on an S52 but I think it would be a better choice for your m52 than an sx300. Read e36 meylo’s thread.

If money is no object, go twinscroll manifold and s52 and ball bearing turbo. I have all that stuff but it’s not cheap and it would not be my recommendation for a budget 400-500 rwhp build.

I’d skip the miller tuning system. Get a tune from one of the other tuners that people here use and like. TRM, Technica, Markert, CES if it will sell you a NickG tune, etc. find out what others are using, how long their cars have been together, and whether they have had any issues.

[vollosso]

Yeah I thought you had an s52 the new borg 6268 and 6468 are going to be a bit big. 6262/35r would be a nice size.


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[someguy2800]

Of the turbos you posted the Garrett 60-1 will be the fastest spooling. The S300's are great turbos but don't really come into there own until 600+ and that 256 is kind of a turd with the giant exhaust housing

If I were you I would get this with a .91 housing or a Garrett gtw.

https://www.full-race.com/store/borg...00-sxe-7670-1/

[okeefethechief]

Unfortunately being young money is most definitely an object lol. im not trying to go over 4-5 grand on the entire motor. I have read many of butters posts yes that has what has gotten me this far as to starting to figure out a good setup for myself. The tune is the very last thing and not set in stone by any means.

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That looks like a great turbo. GTs start to get a hair out of my price range sadly. I like the looks of that sxe. Im really trying to stay in the BW family for cost/support.

[vr6dubny]

Whatever you think it is going to cost add $1,000-2,000.

Even with low boost traction is an issue. Tires, Bushings (diff, rtab, motor, tranny), clutch, exhaust, gauges.

are you planning on doing everything yourself?

Being in NH I would contact Butters and see what he could do on a journal bearing GTW. His brain is like the virtual e36 turbo library. Tons of knowledge between his ears.

[chikinhed]

I have all this stuff for sale, PM if you are interested:

-Steedspeed open T4 turbo manifold (I also have a custom made manifold blanket)
-Garret GTX3582R open T4 0.82
-ATP GT(X)3582R 1.06 twin scroll turbine housing (new)
-Rallyroad turbo engine mount arm
-3.5" aluminum turbo intake pipe and filter
-3.5" stainless v-band down pipe and WG pipe
-Turbosmart Hypergate 45 wastegate (<100 miles)
-AMS-500 boost controller
-e36 A-pillar with pillar pod
-S52 oil pan (with turbo drain)
-ARP 2000 10 mm head studs for m/s5x
-DM Motorsport 4” pre-turbo water injection nozzle holder (blue) (new)
-e32 210 LSD 3.15:1 diff
-S52 cam trays
-e36 M3 aux fan
-188 diff cover
-e36 M3 front brakes
-Ground control spherical rear shock mounts
-Dove grey coupe door & rear panels
-Dove grey M3 rear seat
-Dove grey interior trim and dash

[okeefethechief]

Yes im aware, I will be doing all chassis and motor work myself and help from friends. I have already separated costs from motor to chassis work. I plan on contacting butters once i have a firmer grip on exactly what direction ill be heading.

[okeefethechief]

Some of that stuff i may be interested in but as of now this is all in the planning stage so im only after the things that are definites (s52 cams, m50 mani conv, etc) What stands out is that s52 pan with the drain, i may be interested in that.

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