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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 10-01-2009, 10:08 AM   #1
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Default Boost creep out the ***

So i finished my six speed swap last night and motor install went for a ride and it held 10psi right on the money until 5k then it creeps to 15-17psi. This is on a evo 3 big 16g with a 44LB/min wheel. So i don't know what to do to fix this problem so any help on this would be great.


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mike
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Old 10-01-2009, 03:45 PM   #2
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Are you running a boost controller or just running off the spring pressure in the wastegate?
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Old 10-01-2009, 03:49 PM   #3
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You need to include more information about your setup. How are you controlling the wastegate? What does your exhaust look like? IWG? EWG?
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Old 10-01-2009, 04:05 PM   #4
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You've got a built motor. Run it to at least 17 psi and tune for that. Low boost on a large compressor mitsu turbo never works. Maybe on a 14b or 15c (or whatever the stock Greddy kit has). Not on a E316G, 18G, 20G.


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Old 10-01-2009, 04:17 PM   #5
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Im running a MBC on the car, the wastegate is internal with an external dump. Im only tuning for 10psi for a DD tune then i am going to DYNO tune next week for my race tune 23psi.
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Old 10-01-2009, 05:05 PM   #6
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Could you write a little bit more infor about your high volume oil pump? I saw FMs page about this but haven't heard of anyone running one.
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Old 10-01-2009, 05:12 PM   #7
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port the wastegate.
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Old 10-01-2009, 05:37 PM   #8
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Quote:
Originally Posted by faeflora View Post
Could you write a little bit more infor about your high volume oil pump? I saw FMs page about this but haven't heard of anyone running one.
I got the oil pump from TOGA and i also have an upgraded oil pump gear in it for higher HP.
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