Bigger turbo on FM mani...what will fit?
I have the gt2560 right now @ 12 psi. If I increase the boost anymore the turbo starts to loose it's efficiency and blows more hot air( car starts pinging and etc.). I was considering getting a larger turbo. Does anyone know which turbos will mount right up to my manifold?
Thanks guys |
Really? I think the gt2560 is good for more than 12psi. I'd first look into your tune and intercooler setup before getting a larger turbo.
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Originally Posted by Stripes
(Post 124450)
Really? I think the gt2560 is good for more than 12psi. I'd first look into your tune and intercooler setup before getting a larger turbo.
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It's about mass air flow AND boost/pressure differential, not just boost.
That is to say, a 2560 pushing 12 PSI of boost on a 2.5L engine is flowing a lot more air than one that is pushing 12 PSI of boost on a 1.8L engine. The 2560 has been taken up to ~275-300rwhp, on a good day, on the Miata, so if you're not at that point, I think it'd be a waste of time going for a larger turbo. |
I;m not sure if you have looked at the compressor map on turbobygarrett.com but the turbo should be plenty efficient to 18psi and could be pushed past 20psi pretty easily to squeeze out more power. If you don't have a built motor on the other hand, then you will need a bigger turbo to make more power at the same boost.
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You want the T25 housing version of the GT3071R.
http://www.turbobygarrett.com/turbob...30/GT3071R.htm Mark |
Right. And there's a bunch of turbos from that GT3071R to the GT2554R that will bolt up to the T2 style FM manifold. If you want to keep the downpipe too, that limits the selection to some GT25/GT28 turbos.
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How would yall suggest getting some more power out? Upping the boost with a good tune and possibly getting D/O WI to keep the knocking down. For my exhaust right now I am running a test pipe and a 2.25 midpipe with alittle turndown. I'm going to be getting a custom exhaust soon though. High flow cat and 3" pipe all the way back ( no muffler)
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do you have any datalogs of power runs (like the one from your dyno sheet/pull)?
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Originally Posted by m2cupcar
(Post 124506)
do you have any datalogs of power runs (like the one from your dyno sheet/pull)?
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If you went with a full 3" exhaust I would not be suprised to see, at least, 20whp more on a dyno.
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Originally Posted by neogenesis2004
(Post 124512)
If you went with a full 3" exhaust I would not be suprised to see, at least, 20whp more on a dyno.
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With a 2.25 midpipe thats a major restriction...I'd try a 3" exhaust before dumping money into a new turbo, might save a bit of money.
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Originally Posted by neogenesis2004
(Post 124512)
If you went with a full 3" exhaust I would not be suprised to see, at least, 20whp more on a dyno.
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Originally Posted by TurboTim
(Post 124539)
That's what I got.
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i wanted to change my too
FM said 3071R will bolt on, just the pipe that goes out the turbo need to be bigger, which is easy todo. |
Originally Posted by miatamania
(Post 124518)
With a 2.25 midpipe thats a major restriction...I'd try a 3" exhaust before dumping money into a new turbo, might save a bit of money.
Mark |
No one is saying it can't be done, we are saying he'll make more power with a 3". We are giving him options he might want to try before laying down for a $1000+ turbo.
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I'd go for the turbo anyway. :D Agreed that a better exhaust always will make more power, but my experience was a minimal increase from a 2.5" full exhaust -> 3" dump pipe on my 2560 even with unlimited dyno time at 12 PSI and under.
Mark |
Originally Posted by Markp
(Post 124634)
I'd go for the turbo anyway. :D Agreed that a better exhaust always will make more power, but my experience was a minimal increase from a 2.5" full exhaust -> 3" dump pipe on my 2560 even with unlimited dyno time at 12 PSI and under.
Mark A bigger turbo into the same restrictive exhaust he's running is an assbackwards way to do it. Upgrading the exhaust now will make him good to go when he does go to a bigger turbo. Frank |
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