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gt47 lag on 403?

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Old Jan 15, 2010 | 07:53 PM
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Default gt47 lag on 403?

how much lag will a gt47 with a .9 rear housing have on a 403ci stroker the cam is a 234 238 115 lsa im after 12 psi boost around what rpm will i get the full 12 psi and how low should i be getting any boost the car is manual.
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Old Jan 15, 2010 | 08:20 PM
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you need to look at a compressor map...google is your friend....
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Old Jan 15, 2010 | 08:39 PM
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12 or 13 thousand..
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Old Jan 15, 2010 | 08:45 PM
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12 or 13,000 what?

anyways. being a manual is obviously going to hurt you. going with low rear end gears like 3.23's should help load the car and spool the turbo faster but a 88mm on a 400+ci motor will not be bad at all there are mustang guys running 4788's on 347's and a local guy is running twin 4788's a a 40x ci sbf
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Old Jan 15, 2010 | 08:50 PM
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it was a joke.. dude.
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Old Jan 16, 2010 | 11:53 PM
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Originally Posted by lt1badbird
12 or 13,000 what?

anyways. being a manual is obviously going to hurt you. going with low rear end gears like 3.23's should help load the car and spool the turbo faster but a 88mm on a 400+ci motor will not be bad at all there are mustang guys running 4788's on 347's and a local guy is running twin 4788's a a 40x ci sbf
I think he was joking it would spool around 12 or 13 thousand rpm...
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Old Jan 17, 2010 | 04:17 AM
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lucky it revs to 20,000 then should give me a nive 7k powerband does anybody know roughley when it will start to make boost on a 403ci ?
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Old Jan 17, 2010 | 05:06 AM
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ok just spoke to the bloke with the gt47 i might be buying and he said the front wheel is only 80mm
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Old Jan 17, 2010 | 08:51 AM
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i wouldnt go any smaller than an 88 on a 403. call or email forced inductions. they will be able to help you out with turbo sizing for your needs.

www.forcedinductions.com
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Old Jan 17, 2010 | 09:33 AM
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what about a GT45 on a stock 6.0L that wont ever get built? will that make good power around 8-10psi?
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Old Jan 17, 2010 | 09:58 AM
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I'd say that would be more than fine
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Old Jan 18, 2010 | 03:45 PM
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http://www.dnamotoring.com/new_web/p...product_id=213

is this to good to be true?

thanks
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Old Jan 19, 2010 | 05:07 AM
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the intake is 80mm not the outside of the wheel its a stret driven car so i was thinking a gt45 would be better what sort of rpm diffrence would there between a gt47 and 45 spooling up
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Old Jan 20, 2010 | 11:41 PM
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Originally Posted by big_bird_ws6
yes...
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Old Jan 22, 2010 | 12:23 AM
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Originally Posted by Big_Bird_WS6
That could be better used for a boat ancor, goddamn i hate chinese knock off ****** ****, pisses me off soo much. Cracks me up, for use on "3.0+ and supports 700+hp". A real one would require two 3.0s to spool it and a real one supports in the 1400ish whp range. you couldnt pay me $300 to own one of these
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Old Jan 22, 2010 | 08:51 AM
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Originally Posted by Big_Bird_WS6
Makes a wonderful door stop or paper weight.
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Old Jan 22, 2010 | 08:52 AM
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Originally Posted by psivyss
how much lag will a gt47 with a .9 rear housing have on a 403ci stroker the cam is a 234 238 115 lsa im after 12 psi boost around what rpm will i get the full 12 psi and how low should i be getting any boost the car is manual.
A 403 and a GT47 is good on the intake side. The turbine side is a touch small. I would go with the new GT5018. Same turbo, just has the new 98mm turbine wheel from Garrett.
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