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STS Boost Question

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Old May 13, 2006 | 09:01 PM
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I have a 408 with the t-60 and installed a manual boost control.You can close the valve all the way and it still makes 7lb.We even removed it completely and plugged the hole in the turbo going to the wastegate and it did the same.Any suggestions.
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Old May 13, 2006 | 09:22 PM
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You must have a 7# rating on the wastegate spring.
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Old May 13, 2006 | 09:34 PM
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maybe its just me but isnt that turbo hella small for that CI?if u took off the wastegate and it only made 7 psi your choking the **** out of your turbo/motor.is this a stick or an auto?
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Old May 13, 2006 | 09:35 PM
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Holy ****! I was worried about my 76 on a 402...
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Old May 14, 2006 | 11:00 PM
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Originally Posted by vandal0-0
I have a 408 with the t-60 and installed a manual boost control.You can close the valve all the way and it still makes 7lb.We even removed it completely and plugged the hole in the turbo going to the wastegate and it did the same.Any suggestions.

I would go back and check the install instructions and make sure you have everything hooked up properly.
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Old May 15, 2006 | 12:00 AM
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ummmm at 7 psi your pressure ratio is ~1.47.if you look at the air comsumption chart for a 408 its approximately 66lbs/min of air.now take a look at a T67 turbo which is quite a bit bigger than his T60....@66lb/min and a pressure ratio of 1.47 hes no where close to being on the chart in the efficiency range....so its even worse with the T60....really mismatched setup is the problem
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