DIY Turbo Discussion greddy on a 1.8? homebrew kit?
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Need Turbocharger Advice

 
Old 04-06-2008, 10:53 PM
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Default Need Turbocharger Advice

A turbo setup has its appeal. I want to do the twin SC setup, but it's looking like I will turbo charge it instead. I'm sure everyone here already knows turbos are better anyway.

So, I need to know what turbo I should use. I know, that's a newb question right. I know a little about turbos and I'm doing my best to learn. I've read the turbo specific sections of Maximum Boost, though I certainly need to reread it. (I've already read Supercharged cover to cover)

I want to make big power. 300 whp minimum, but would like to make more as I think the stock motor will take it. I will build a nice custom manifold, 3" exhaust, etc. I have a lot of head work. I'm not really worried about spool or "lag" as I will have nitrous to spool the turbo.

I've looked at the eBay turbo's per Markp's suggestion. The Chinacharger t3/t4 "with the blue tag" is no longer on there unfortunately. Besides, I think I would rather pay up front for a name brand turbo for peace of mind as this is my college car/daily driver.

Others have suggested avoiding the eBay turbos and getting a name brand one. That sounds fine to me. I'll have the money this summer to buy a good one, be it new or used. I'm considering the following turbos offered by TunerToys:


Garrett T3 60-1 with .63AR (715583-5006) - $615 Shipped
Garrett T3 60-1 with .82AR (715583-5007) - $615.00 Shipped
Garrett T3/T4E 60trim, 63ar - $583 shipped

The only difference between the first two is the A/R of the turbine. The third is a Garret t3/t4. Which turbo would be the best choice for say 300whp? 350whp? It's my understanding the larger A/R of the turbine, the more lag, but more HP. That's a trade off I'm willing to make.

Thanks.
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Old 04-07-2008, 10:59 AM
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Anyone? Looking for something that would spool around 5K on a stock motor but would make huge power. I have headwork and nitrous to spool it sooner.
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Old 04-07-2008, 11:09 AM
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go with the T3/T4 fitty trim
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Old 04-07-2008, 11:09 AM
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then get the .63, the .82 probably wouldn't spool till 6-7k.


the 60-1 is insanely large....thats a 600hp wheel. the to4e 60 trim is more inline at 450HP.
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Old 04-07-2008, 11:12 AM
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I think you haven't had much response because you're asking for a couple things that are mutually exclusive. If you're "only" looking for ~325 whp, then you don't need a turbo that spools at 5k rpm. Something T3 with a 63A/R turbine is in your future, just pick your compressor to suit. A 50 trim maybe. Which is what I'm leaning towards myself.
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Old 04-07-2008, 11:51 AM
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For clarity, I'm NOT 'only' looking for 300whp. I would like to buy a turbo that will take me to 400whp up front, and build to it. I plan to go straight to 300whp. I'll only be at the 250whp range long enough to tune those cells and make sure everything is safe. Then I turn up the boost and tune again. Then get the WI going and make sure everything is ready, then push it further.
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Old 04-07-2008, 12:13 PM
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This looks promising: http://cgi.ebay.com/ebaymotors/GENUI...QQcmdZViewItem

Only question is I don't see the word Garret on the compressor housing.
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Old 04-07-2008, 12:17 PM
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yeah, my thoughts as well, make sure you pay with credit card and if it's not a garrett, reverse your charge in claim of false advertising, the site clearly says genuine garrett, so up their *** if it's not
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Old 04-07-2008, 12:40 PM
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Includes a Garrett TA34 stage 2 turbine wheel and Turbonetics .63 a/r turbine housing with the standard Ford 5 bolt T3 exhaust outlet flange.

then it's not really a genuine Garrett now is it?!
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Old 04-07-2008, 12:47 PM
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Isn't Turbonetics like a china thing?
if so, you can alwys buy a BB t3t4 cartrige and source whatever housings you want for it...i thnink i saw a GT35 BB cartridge for $400ish...
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Old 04-07-2008, 12:49 PM
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turbonetics makes good stuff. this turbo should be advertised as rebuilt, or home built, not genuine
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Old 04-07-2008, 02:04 PM
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i think i confeused them with turboXS or something...
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Old 04-07-2008, 02:29 PM
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IMO you are better off buying a new garrett turbo from garrett retailer for $150 more. That'll remove the majority of risk associated with the eBay turbos. I just did a bunch of shopping around and TunerToys had very competitive pricing. If you do have a problem after the purchase you have somebody to go to.
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Old 04-07-2008, 02:40 PM
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true that as well, i keep forgetting how bad ebay has gotten
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Old 04-07-2008, 06:32 PM
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Ok, so we have the t3/t4 setup. Likely a .63 A/R turbine. I see "50 trim" used a few times. There is a 57 and 60 trim listed on TT's site. I suppose he can order the 50 though I need to verify that. Would I be better off with a 57 or 60 trim? What effects would a larger compressor have if I keep the same .63 A/R turbine?
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Old 04-07-2008, 06:51 PM
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Originally Posted by patsmx5 View Post
Ok, so we have the t3/t4 setup. Likely a .63 A/R turbine. I see "50 trim" used a few times. There is a 57 and 60 trim listed on TT's site. I suppose he can order the 50 though I need to verify that. Would I be better off with a 57 or 60 trim? What effects would a larger compressor have if I keep the same .63 A/R turbine?
Based on other 1.8L miata dynos, I'd imagine that you'd be pretty happy with the 50 trim considering that you plan on headwork and possibly nitrous to spool the turbo. Using a stage 3 turbine in the 0.63 A/R, would get you north of 300 and pretty close to 400 depending upon your setup AND it should spool easily before 5k. Take a look at eliminator's dyno results on m.net. Last I checked with built engine, headwork, cams he made north of 500rwhp with a 0.8x A/R turbine and made ~420rwhp with the 0.63 A/R turbine.

FWIW, if you wanted to go chinacharger which iirc is a copy of the 57 trim, they do still have those blue tag units on ebay, but just not the same seller that markp got it from. A larger compressor trim/wheel will create later spool, but if you meet your goals with the "smaller" turbo without straining it (aka out of efficiency range/creating excessive heat) and at earlier rpm, why go larger if not necessary?

Also, not sure about budget/footprint constraints but you might want to also take a look at the GT3071/3076.
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Old 04-07-2008, 06:58 PM
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Yea, for clarity I already have the headwork and nitrous on the car, that's why I figure I could run a large one and be ok. I don't want to go larger than necessary. I know little about these things so I'm asking. If a 50 trim will take me to 400whp, great, that will work. Sounds like your saying it took eliminator to 500 with just a turbine swap. In that case, I would infer that a 57 or 60 trim would be overkill.
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Old 04-07-2008, 08:03 PM
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you guys talking about a 50 trim to4e compressor? because a t3 50 trim isn't efficient enough to make 400 whp.
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Old 04-07-2008, 08:08 PM
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Originally Posted by Arkmage View Post
you guys talking about a 50 trim to4e compressor? because a t3 50 trim isn't efficient enough to make 400 whp.
Hmm, it's not? Well, what would you suggest and why? I'm all ears for opinions. Perhaps a t3 60 trim with a .63 A/R?
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Old 04-07-2008, 08:12 PM
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Originally Posted by Arkmage View Post
you guys talking about a 50 trim to4e compressor? because a t3 50 trim isn't efficient enough to make 400 whp.
Yup I was talking T04E. A T3 compressor wheel can make 300 if you push it to the limits, but to comfortably reach 300 and more you will need a some form of T4 compressor.

FWIW, a lot of honda guys love the 57 trim for their 1.8L, BUT their heads also flow waaaaaaay better than ours. I just said 50 trim as there is actual dyno info for a miata.
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