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Turbine A/R? Wheel Stages? [Archive]

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Freshalloy Forums > Nissan > The Sports Cars > 240SX (S13,S14,S15) - Advanced > T3/T4 60 Trim - Turbine A/R? Wheel Stages?

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BlazedGlory

08-23-2005, 09:47 AM

I realized that I don't want to drop the cash required for a ballbearing turbo, even though I know that the spool is a bit quicker and whatnot. I've narrowed my search to a T3/T04 hybrid, but I'm not sure where the best place is to buy the turbo, and what options I should get. I want the turbo to top out at around 450-475 whp for an SR20DET, but I'll probably be running 400s until I decide to get larger injectors later (if I ever do).

I think I want to get a 60 trim, but I'm not sure which turbine a/r to get. I know that a .82 would be way overkill for what I need. I was wondering if a .48 would yield better spool times and still get me the desired power level. I know most people are running a .63 a/r housing.

I was also wondering what the difference between a Stage III and whatever other wheels there are. I noticed full-race will put in a stage V wheel for $160 more. They also have the option 360 degree thrust bearing for $75 more. To be honest I don't really know what all this means. I assume usually these turbos come with 270 degree thrust bearing?

I'm now looking at cheapturbo.com, hpautoworks.com and full-race.com unless there are better (and/or cheaper) places to purchase these turbos.

I guess it will also help to tell you what other mods I'll be doing. Right now I'm running an S13 SR20det with basic stuff, fuel pump, exhaust, ebc, fmic, etc... I have a collection of parts building right now for one big upgrade though. Greddy valvesprings, topspeed intake manifold, peakboost turbo manifold, 700cc injectors, z32 maf, crower titanium retainers, hks step2 264 cams, cp pistons, eagle rods, arp main/head studs, etc...

Thanks for the help...

asad

08-23-2005, 10:58 AM

I think I want to get a 60 trim, but I'm not sure which turbine a/r to get. I know that a .82 would be way overkill for what I need. I was wondering if a .48 would yield better spool times and still get me the desired power level. I know most people are running a .63 a/r housing.



I'm not sure you should rule out the 0.82...you may need the extra flow to reach 475whp.




I was also wondering what the difference between a Stage III and whatever other wheels there are. I noticed full-race will put in a stage V wheel for $160 more.



Stage I, II, III, etc refers to the turbine wheel. Basically just bigger turbine wheels. A stage V wheel is a T350 wheel similar in size to the stg.III but with a different blade design. You'll probably want one for 475whp.



They also have the option 360 degree thrust bearing for $75 more. To be honest I don't really know what all this means. I assume usually these turbos come with 270 degree thrust bearing?



360 degree thrust bearing is supposed to be more durable than 270.

Check out ATP Turbo, they usually have pretty good pricing.

Asad

BlazedGlory

08-23-2005, 12:58 PM

well, if I get the .63, stage III wheel, and 360 deg thrust bearing, where would that perhaps top out with my mods - around 450whp or so?

Thanks for the explanation and help thus far...

steve shadows

08-23-2005, 01:37 PM

go stage 3 t3

go to4e comp

then build around it.

very simple

_Def_

08-24-2005, 12:36 AM

I might step up to a larger compressor like a 60-1 or 62-1 depending on how the compressor maps looked. Going from memory, the average 50 or 60 trim T04E wheel is going to be really huffing it to hit 450rwhp, and I don't know if 475rwhp is even possible with one of those things. They're decent sized wheels, but I think you need something larger for goals that high.

You should probably be thinking about a Stage 3 0.82 A/R turbine setup for your power goals as well. You could probably do it with a 0.63 A/R housing and get faster spool, but you'll have to really turn up the boost to get to that power level with the more restrictive housing. I assume you want more top end rather than concentrating on a more streetable spool.

BlazedGlory

08-24-2005, 05:31 AM

well actually I want more streetable spool. I don't want like a 2krpm powerband or something. That's why I was saying that I want something first that will push low 400s with my mods, but will possibly give me room to play with later if I want to get larger injectors and go for around 475whp max or something.

All I was thinking was some room to play, but I know low 400whp would be hella fast, and I saw in another thread that people were getting that out of a .63 on stock intake and cams...

Keep the thoughts coming...thanks guys!

cwdmark

08-24-2005, 02:15 PM

i'd go 60 trim if i were you

i have a 57 trim with .63 exhaust, ill get a dyno up as soon as i get it running, should be within the next two weeks.

BlazedGlory

08-24-2005, 07:28 PM

i'd go 60 trim if i were you




hehe

_Def_

08-24-2005, 10:40 PM

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