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Old 12-03-2017, 06:05 PM   #1
oLemurs
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boost leak?

So i am having this issue with my sr20 where it only makes around 1 or 2 pounds of boost at around 4000 rpm and i was wondering if its because i have a boost leak. ill link the video im also curious if a boost leak would have the same effect as a vacuum leak meaning it sounds cammed when the engine is warm
https://youtu.be/hLVBrDx3DwU
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Old 12-03-2017, 06:23 PM   #2
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Your boost gauge is hooked up pre-throttle body so you should change that so you can get a vacuum reading with the throttle plate closed.

Your car isn't going to make boost just free-revving.
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Old 12-03-2017, 07:09 PM   #3
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You are only running about 10inHg on vaccum, should be more like 20-22. I would definitely say you have a boost leak.

- you arent going to make any boost sitting idle, gotta drive it to do that.
- Is your MAF setup draw through or blowthrough?
- are you familiar with how to do a boost leak test?
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Old 12-03-2017, 08:54 PM   #4
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Quote:
Originally Posted by unicoder View Post
You are only running about 10inHg on vaccum, should be more like 20-22. I would definitely say you have a boost leak.

- you arent going to make any boost sitting idle, gotta drive it to do that.
- Is your MAF setup draw through or blowthrough?
- are you familiar with how to do a boost leak test?
im not sure if it is draw thgough or blow through, but here is what the intake looks like. i do not have the supplies to do a boost leak test yet but i should probably buy them
https://imgur.com/gallery/Zg2Y5
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Old 12-03-2017, 09:11 PM   #5
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Quote:
Originally Posted by e1_griego View Post
Your boost gauge is hooked up pre-throttle body so you should change that so you can get a vacuum reading with the throttle plate closed.

Your car isn't going to make boost just free-revving.
i hooked it up to where the egr was, also thanks for letting me know it wont make boost out of gear
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Old 12-03-2017, 09:50 PM   #6
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Quote:
Originally Posted by oLemurs View Post
im not sure if it is draw thgough or blow through, but here is what the intake looks like. i do not have the supplies to do a boost leak test yet but i should probably buy them
https://imgur.com/gallery/Zg2Y5
It's draw through, since your MAF is before the turbo.

Always start with the boost leak test, it will save you hours of headaches
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Old 12-03-2017, 10:37 PM   #7
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Quote:
Originally Posted by unicoder View Post
It's draw through, since your MAF is before the turbo.

Always start with the boost leak test, it will save you hours of headaches
got it, just ordered a bunch of stuff for the test
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Old 12-05-2017, 05:47 AM   #8
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No boost with no load unless you have launch control / antilag

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