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Old 09-17-2010, 01:27 AM   #1
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Default 60trim 56mm to 60trim 60mm, worth it?

As the title states...if I bored my compressor housing out and went from a 60 trim 56mm wheel to a 60 trim 60mm wheel, would it really be worth it? My car is driven at least 50 miles a day and used for work commuting with the ocassional red light throw down, but my current turbo might support roughly a 240whp max. Id' like to lay down 265 whp by 15psi, and I feel that since I'm running a similarity of a 2554, if I upgraded to what a 2560 compressor size is, I might achieve this goal. I know this sounds like a repeat thread of my former posts, and it kinda is, but I'm dead set on this current journal bearing turbo I use. I have a **** load of parts for this turbo, including a spare CHRA and compressor that I'd like to send out to get this work done to. So please don't tell me to just grow a sack and buy a 2871, cause I know that's what I should do, but this is what I want. So 56mm to 60mm...Significant increase in CFM's, slight decrease in spool, meeting my power goal?
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Old 09-17-2010, 01:29 AM   #2
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Quote:
Originally Posted by thirdgen View Post
As the title states...if I bored my compressor housing out and went from a 60 trim 56mm wheel to a 60 trim 60mm wheel, would it really be worth it? My car is driven at least 50 miles a day and used for work commuting with the ocassional red light throw down, but my current turbo might support roughly a 240whp max. Id' like to lay down 265 whp by 15psi, and I feel that since I'm running a similarity of a 2554, if I upgraded to what a 2560 compressor size is, I might achieve this goal. I know this sounds like a repeat thread of my former posts, and it kinda is, but I'm dead set on this current journal bearing turbo I use. I have a **** load of parts for this turbo, including a spare CHRA and compressor that I'd like to send out to get this work done to. So please don't tell me to just grow a sack and buy a 2871, cause I know that's what I should do, but this is what I want. So 56mm to 60mm...Significant increase in CFM's, slight decrease in spool, meeting my power goal?
You answered your question.
Your last thread and this thread are basically you trying to get us to justify you keeping your current turbo.

LOL

If you want the extra 25hp and absolutely must keep the turbo, throw in some w/i or run e85 and make it happen. Or take your chances with an agressive tune.
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Old 09-17-2010, 01:42 AM   #3
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Yeah, but how much would a 4mm difference increase the max hp of this turbo?
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Old 09-17-2010, 01:57 AM   #4
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I also can't see running E85 or WI on a turbo that small. That's something for over a 400whp application on a miata, not under 270. All I know is, I recently ran a 13.90 on just under 200whp, so I'd be more than happy running a 12.90 in my "homo **** box" that everyone disses at work, and be able to say it's on a junkyard turbo. **** those mustang driving, jegs catalog page flipping, credit card swiping jerkoffs. I just wanna say I beat your 02 cobra with less whp and aside from that, my visa balance is 0.00 and I have the title for my car, not the bank.
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Old 09-17-2010, 02:02 AM   #5
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wi/e85 has nothing to do with power level at all. tons of people here use it at only 200.

You can pick up a kit for 200 or so. Then crank that little bitch up and see how much power/torque you can squeeze out of it. if it blows its a cheap junkyard turbo that you won't care about. I'd bet a significant ammount of money that with a maxed out t25 with w/i and good driving that car will go faster than 12.9
in the process I'm sure you'll get to enjoy a very torquey midrange that will surprise the hell out of you for such a small turbo.


I'm just sayin. If you wanna do it on the cheap that's the way I'd go. Otherwise go china 2871 and have lots of headroom. why spend money modifying a cheap *** turbo?

again, just my .02
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Old 09-17-2010, 02:09 AM   #6
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Thanks for your input.
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Old 09-17-2010, 11:14 AM   #7
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trim = inducer^2/ exducer^2

are you suggesting going from a 60 trim t25 sr20 turbo wheel to a 60mm T3 wheel, effectively making your turbo a t28?

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Old 09-17-2010, 11:48 AM   #8
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That would be correct.
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Old 09-17-2010, 01:18 PM   #9
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do it.
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Old 09-17-2010, 02:19 PM   #10
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Fine, I will.
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