Forced Induction Custom FI Setup Questions

18 + psi, no no no no!!!!

Old 04-27-2008, 02:43 PM
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Default 18 + psi, no no no no!!!!

I have a new problem, looks like my 8psi internal wastegate doesn't works correctly. When i hit full boost in 3rd gear it goes to 18 + psi, like if the wastegate doesn't open.

I check the wastegate arm to verify it moves, and seems to be ok.

Need to change the wastegate or what i need to do?

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Old 04-27-2008, 02:46 PM
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Default Re: 18 + psi, no no no no!!!!

you sure the vac line didnt pop off?
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Old 04-27-2008, 02:50 PM
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Default Re: 18 + psi, no no no no!!!!

either that or the line is getting weak from heat causing the line to expand giving your WG a false psi reading and making it open waaaaaayyy to late. It was happening to me. I had to re-route my WG line behind the VC...
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Old 04-27-2008, 09:28 PM
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Default Re: 18 + psi, no no no no!!!!

Originally Posted by JoshMO
either that or the line is getting weak from heat causing the line to expand giving your WG a false psi reading and making it open waaaaaayyy to late. It was happening to me. I had to re-route my WG line behind the VC...
I think that is going to be the problem.

Let me change it, and see what happens.

Thanks
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Old 04-27-2008, 10:54 PM
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Default Re: 18 + psi, no no no no!!!!

high pressure fuel line is nice to use for vac line that is under high heat and pressure
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Old 04-27-2008, 11:06 PM
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Default Re: 18 + psi, no no no no!!!!

put a carb spring on it
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Old 05-03-2008, 03:15 AM
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Default Re: 18 + psi, no no no no!!!!

Internal wastegate changed, same problem, vacuum line changed, same problem.

Solution: Need an external wastegate
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Old 05-03-2008, 08:46 AM
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Default Re: 18 + psi, no no no no!!!!

Originally Posted by hard2obtain
Internal wastegate changed, same problem, vacuum line changed, same problem.

Solution: build motor for 18# of boost
Fixed it for you
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Old 05-03-2008, 03:54 PM
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Default Re: 18 + psi, no no no no!!!!

Originally Posted by Eville140
Fixed it for you
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Old 05-03-2008, 04:58 PM
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Default Re: 18 + psi, no no no no!!!!

Originally Posted by hard2obtain
I check the wastegate arm to verify it moves, and seems to be ok.
Lets see your down pipe. You sure the flapper is opening all the way?

You might have a leaky diphram or bad vacuume source. make sure you dont have a check valve or something from where your getting it from.
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