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Old 12-01-2008, 06:18 PM   #1
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Turbine sizing help: .48 vs .63

I have a 2.0 Duratec, stock internals with no intention to upgrade internals.
I'm looking to upgrade the IHI turbo I have to a larger T3 from a Thunderbird/SVO.
They come in 2 sizes: .48 turbine and .63 turbine, both with a .60 comprsesor.
Looking at a compressor map either of these will work perfectly for my moderate 10-12psi and not run out of breath early like the IHI.

I'm leaning towards the .48 for a the faster spool vs the .63, but I'd like to hear what the folks here have to say.
I would think either would push air all the way to 7k rpm.

I'm pleased with the power the IHI made (204whp/224tq), but after 5k rpm it drops off very quickly because it's way out of it's efficiency range.
I want to see that power all the way to 7k rpm.

Here is a .60 compressor map.




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Old 12-01-2008, 06:40 PM   #2
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i am running a .63 on mine. i think mine would have been better off with a .48. but i have a zetec and they dont flow any thing like a duratec. so i dont think i can be of much help exhaust to show my dyno
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Old 12-01-2008, 06:52 PM   #3
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Quote:
Originally Posted by Turbo Turtle View Post
i am running a .63 on mine. i think mine would have been better off with a .48. but i have a zetec and they dont flow any thing like a duratec. so i dont think i can be of much help exhaust to show my dyno
Sure go ahead and post up your dyno if you don't mind.
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Old 12-01-2008, 07:16 PM   #4
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Old 12-01-2008, 07:18 PM   #5
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Thanks! What is your low boost setting, and what size is your compressor?
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Old 12-01-2008, 07:24 PM   #6
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my turbo is a garrett t3/to4e 50trim stage5 wheel .63ar w/360 thrust bearing... it is for sale

low boost is 14psi high boost is 24psi
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Old 12-01-2008, 07:48 PM   #7
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woah low boost at 14psi! nice
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Old 12-01-2008, 08:33 PM   #8
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Oh Fudge !

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Old 12-01-2008, 08:34 PM   #9
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In all the years I have been doing turbos for years I allways though a t3 s60 was just that and it didnt matter who or how it was built a t3 s60 was just that , about 10 years ago I got playing on the dyno just changing turbos from one co to another and all had the same trims and build specs yet I was seeing from best to worst turbos spooling 800 rpm quicker making in the range of 45 pound foot more tq down low some would reach 370hp some would fall off at 340

There are Co out there BIG NAME ONES that do nothing to move forward keep the same crap throw ball bearing at it , give it a stupid name and wana be turbo experts suck them up , I look around , test things and so far Comp turbo is a new and hungry Co and I have been very pleased with there work to date , I would see if Justin at Comp has anything you like then give me a call and I am a dealer for them now , I use there stuff because it works and it has shown that on here

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Old 12-01-2008, 08:42 PM   #10
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So Tom, would you suggest the .48 or .63?
I appreciate your suggestion for the Comp turbo, and will look into them if I go that route.
Right now I'm just interested in the best choice between these two turbos.
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