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Old 09-27-2008, 06:21 AM   #1
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Default perfect 00nb turbo *edit- FINALLY GOT ONE!!

Ok so the subaru is sold as of yesterday, so I finally have some (not much) funds available to start putting together a kit for my miata. Here is my question:

From personal experience and/or knowledge what turbo would be best for me for my situation in your opinion?

As the title states, its an 00 nb 5sp. Not hardcore into track racing, just want a fun/fast car to have some fun in. Must have AT LEAST 200-220whp. Will be used 60% daily/weekend twisties, 30% drag racing, and every once in a blue moon (10%) a track/autox day. Not as crazy about fast spool as a solid topend.

From what I gathered here, tell me if my opinion of each is correct, and then maybe suggest which one you'd go with:

garrett t25 - cheapest, insta-spool, not much of a topend or big power capability
garrett gt2554 - same as above but bb, better spool, more expensive
garrett gt2560 - a t25 with a better topend, not very common so not cheap
garrett gt28rs - later spool, better topend, expensive as ****

td04 out of a wrx - very few have successfully installed them, but the results seem to be pretty good.
I have one laying around, so that would be the cheapest option, though would include more work, since id have to reweld flanges, rotate it, and mess with it to make it work.
Just wanted to get some opinions on which one is the best fun/dollar ratio and why.
Any more info needed just say so, and yes I searched so please be nice.
-Vlad

ps: im a little buzzed and its late so if I mis-typed something have mercy on my soul

Last edited by 18psi; 09-29-2008 at 01:28 AM. Reason: update
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Old 09-27-2008, 07:16 AM   #2
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garrett t25. cheapest **** around and will be fun as hell.
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Old 09-27-2008, 08:12 AM   #3
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have you looked at oem t3 turbos? Personally im looking for a good deal on a t3 .48 60trim from an 84 - 86 ford SVO. If you want a small turbo, smaller trims are available like the 45 or 50 trim t3 .42/.48 those are between 2550 - 2560 in power and spool. Just another idea.
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Old 09-27-2008, 09:41 AM   #4
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I have a T25 on my car and have zero complaints with its capability. Then again, I wasnt going for big power. If I do decide to go for big power, its going to involve and engine build and a GT28.
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Old 09-27-2008, 10:37 AM   #5
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Look for a used GT2554r and don't look back.
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Old 09-27-2008, 03:49 PM   #6
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Quote:
Originally Posted by thread title
finding the perfect turbo for a 00 nb
what does cost matter if you're looking for perfection? Get the 2560. we all know it's pretty much awesome for anything up to 300 rwhp.
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Old 09-27-2008, 05:13 PM   #7
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I have a 99 NB and I have a T25 from an SR20 on it and love it. It is a perfect all around turbo. It's cheap...but I think if I did it all over again I'd get one from an S14 which I think is a T28 / T25 hybrid? Maybe? Although a SR20 T25 is good till like 14psi I'm sure....which is more than you'll need. I'd pick up one of those and run like 12psi with a good tune and be done with it.
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Old 09-27-2008, 05:28 PM   #8
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thanx for the input guys. so a t25/gt2554r wont be too small? hmm, well thats pretty cool. I thought that a turbo that small would run out of breath up top....Im really not looking for something crazy, but just dont want it to fall on its *** say after 5k rpm. boost level would be anywhere between 8-12psi.

classifieds/ebay is my best bet for those as well right?
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Old 09-27-2008, 05:32 PM   #9
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Quote:
Originally Posted by y8s View Post
what does cost matter if you're looking for perfection? Get the 2560. we all know it's pretty much awesome for anything up to 300 rwhp.
+1 for the 2560.
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Old 09-27-2008, 06:09 PM   #10
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TD04. Its free and you just need to do some machining to make it work. Why pay more for bolt in when you can save cost and spend money on other things to make the system work better with the turbo.
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Old 09-27-2008, 07:23 PM   #11
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that is a very good argument. I have one laying around, and from what I gather It flows more/can handle more than a t25. I just need to figure out where I can buy flanges for the header/dp to fit the td04 and that will be a heavy contender among the group listed.

so just to put it to rest: NONE of you think that a gt28rs will be a good turbo without forged internals? I guess what Im asking is if the turbo cant be put to good use unless you are forged and can turn up the boost into the turbo's sweet spot
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Old 09-27-2008, 07:33 PM   #12
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No, that's not it. A gt28rs will make more power per PSI. They are saying that within moderation, you max a 2254 out between 220-240, a 2560 between 250-300, and a gt28rs would be something higher, though I don't know what. You would not have to run forged internals to use the turbo. Now, if you planed to max it out, then you might want forged internals, it depends. But if you just want to make more power up top and make more power per PSI than a 2560, it will do fine. But spool won't be as good.

** I have never used or even seen in person any of these turbos. All that info is just **** I've read. No real world experience with them whatsoever.

FWIW, I'm gonna run a GT3271 on my 99 on stock internals. If I wanted 250 whp, it would do it, but it would be a bit laggy. But power would hold strong up top. I'm going for more like 350whp though, and on stock internals mind you. It's pretty safe to say if you HAVE A GOOD TUNE***** that 300whp is safe on a 99 with a 7K rev limit.

***** That means not a shitty tune. A good one. Not knocking tune Safe A/F ratio tune. Etc.

Oh, this thread kinda sucks. You REALLY need to be specific to ask what the perfect turbo is. Like you say at least 200-220whp. Well hell a 2554 will do that. But we can assume you may want more in the future. If so, how much? If you want 220 now but you know you gotta have 300whp before long, then don't buy a 2554.
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Old 09-27-2008, 08:18 PM   #13
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I live in the desert and wanted to keep heat as low as possible so I went with the GT28RS for the lower back pressure. I based that entirely on the Porsche example in Maximum Boost (pg23). My car is still on jack stands, though, so I have no idea how good or bad my choice was yet.
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Old 09-27-2008, 08:27 PM   #14
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Quote:
Originally Posted by patsmx5 View Post
No, that's not it. A gt28rs will make more power per PSI. They are saying that within moderation, you max a 2254 out between 220-240, a 2560 between 250-300, and a gt28rs would be something higher, though I don't know what. You would not have to run forged internals to use the turbo. Now, if you planed to max it out, then you might want forged internals, it depends. But if you just want to make more power up top and make more power per PSI than a 2560, it will do fine. But spool won't be as good.

** I have never used or even seen in person any of these turbos. All that info is just **** I've read. No real world experience with them whatsoever.

FWIW, I'm gonna run a GT3271 on my 99 on stock internals. If I wanted 250 whp, it would do it, but it would be a bit laggy. But power would hold strong up top. I'm going for more like 350whp though, and on stock internals mind you. It's pretty safe to say if you HAVE A GOOD TUNE***** that 300whp is safe on a 99 with a 7K rev limit.

***** That means not a shitty tune. A good one. Not knocking tune Safe A/F ratio tune. Etc.

Oh, this thread kinda sucks. You REALLY need to be specific to ask what the perfect turbo is. Like you say at least 200-220whp. Well hell a 2554 will do that. But we can assume you may want more in the future. If so, how much? If you want 220 now but you know you gotta have 300whp before long, then don't buy a 2554.
ok sorry Ill be more specific. I want 200-220 so start out with, and about 260-270 eventually....really dont think ill need any more than that. I know the wrx td04 and garrett t25 should get me to about 200-220, but thats about it. the 2560 will get me to 250 It looks like but is way more expensive. The gt28rs looks like Is not going to happen for me. Now that I think about it, if I dont plan to go over said 270 limit, why pay so much more for a turbo that I wont use to its potential. so now its between the 2554, 2560, and the td04.

Ive seen some nice results from a t3 super 60, so that might be a contender.
Like I said before, any more info needed just tell me, Ill be happy to give you as much info for you to give me a good opinion to help me decide/find the right turbo.
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Old 09-27-2008, 09:17 PM   #15
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now it's 270 rwhp. 2560. Look at paul's dyno plots man!

the 2554 would be great if 240 was your max peak. but seriously you give up almost nothing by moving up to the 2560.

as for the 28rs, my turbo is the same hotside but with a slightly larger compressor. it spools ok. and I'd rather have the low end for my current power level but if I ever need to raise the boost, I've got headroom to well over 300.
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Old 09-27-2008, 09:18 PM   #16
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OK, what are your guys' opinions about this turbo:

Quote:
garrett t3 turbo w/ hks compressor

Notes: HKS GT2535 - 340 PS Output Trim: 56T; A/R: 0.86; Flange Type: T25 Flange; Wastegate Type: Internal COMPRESSOR: -Wheel- 56 Trim - 51.6 Inducer / 69.0 Major -Housing- 60 Inlet / 50 Outlet - 0.60 A/R TURBINE: -Wheel- 76 Trim - 53.8 Major / 47.0 Exducer -Housing- GT25/T3 inlets / Outlet specs: Internal GT25 outlet; 0.64, 0.86 A/R Skyline Type; 0.64 A/R
a local guy is selling it on cl for a decent price. is the .86 a/r WAYYY too big or still acceptable?
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Old 09-27-2008, 09:20 PM   #17
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Quote:
Originally Posted by y8s View Post
now it's 270 rwhp. 2560. Look at paul's dyno plots man!

the 2554 would be great if 240 was your max peak. but seriously you give up almost nothing by moving up to the 2560.

as for the 28rs, my turbo is the same hotside but with a slightly larger compressor. it spools ok. and I'd rather have the low end for my current power level but if I ever need to raise the boost, I've got headroom to well over 300.
so dont settle for a 2554? the main reason I even consider it is because of the price really, if they were the same as the 2560 it wouldnt even be up for discussion.....what do you think about the turbo in the above post man? guy is selling it for 300....I look in your build link and see that your gt25 is a .86 ar as well, but then it says you switched to a smaller one....was the spool that bad that you had to go smaller?
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Old 09-27-2008, 09:28 PM   #18
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+1 for a 2560
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Old 09-27-2008, 09:40 PM   #19
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18psi - Go with the TD04! You will not regret it one bit. With the money you save on the turbo, buy/make a good tubular manifold like the ETD, and go with a very free flowing exhaust - either 3" or a separate low-restriction wastegate dump tube. On the 1.8 it should spool like or close to a 2554 with higher potential for top end. If you get bored with that you know you could always do one of your fabulous port jobs. If you are still not satisfied, you know where to get vf39's for cheap!

BTW, pm Weirtech on this forum, he will hook you up with 3/8" inlet/outlet flanges for very less money.
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Old 09-27-2008, 09:52 PM   #20
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YESSSSSS, finally you post here..I was hoping to get some input from people with each of the turbo's listed, and most have been commented on except for the td04.

the spool - you say full boost by 2600rpm right?
power - you posted before that your car feels significantly faster than a t25 car you got a ride in (or did i get that wrong?)
the topend - you say the td04 DOES NOT taper up top and holds boost all the way to redline
is any of this correct?
reason I ask, is that even though Ive been playing with td04's for a long *** time, they were all on 2.0L and 2.5L wrx's...and thats a completely different engine. it would spool like crazy, hella fast, produce a SHITLOAD of torque (many ~290wtq), not that much power (~230-240 usually the tops), and pretty much fall on its *** after 5.5k rpm.
also, you say it was a little bit of a pita to get the turbo to work since after clocking it you have to get a new wg actuator bracket. care to shed some more light on this?
one of the reasons im even considering a garrett style turbo right now is because I REALLY dont want to spend a shitload of time and effort changing the flanges, and messing with it to make it work. buy a header, turbo and dp and ur done...with the td04, id have to cut off the flange on the header, reweld a wrx flange, and same goes for the dp. how long/hard was that for you? my dad is a welder so the welding is not the hard part, just making it all work.

ANY info would be appreciated..




PS: ANYONE CARE TO COMMENT ON THE TURBO IN POST 16? would it be good on a 1.8 or not
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