New turbo setup losing boost...??????
05-02-2009, 09:57 PM
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New turbo setup bleeding boost...?????? I have a kentucky turbo t78 setup and my car is not holding boost. Had the car dyno tuned and it was losing load on the dyno... Had a leaky rear main and factory clutch so figured that was the issue... clutch slip. Well just installed a monster lvl4 and went out for a test run and still have the same problem. The car comes into boost at about 3k rpm hits about 5psi and starts dropping down to about 3psi by redline. This car is not even putting down enough to spin the tires in first gear.. Does anyone have any idea what this could be?
Last edited by 2002RamAir; 05-03-2009 at 08:45 AM.
05-02-2009, 10:28 PM
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Its a turbosmart gate with a 7psi spring being controlled by the turbo.
05-03-2009, 08:51 AM
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Would my boost bleeding off possiably be because of where the wastegate is referenced from? If I moved it from off the turbo to the intake would that maybe fix my prob?
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05-03-2009, 06:59 PM
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i would reference the manifold vise the turbo itself. i have a hobbs switch on my turbo to run my second fuel pump. and depending on throttle % i can make it turn the pump on at different manifold boost levels.
05-04-2009, 01:58 PM
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Just switched the gate to be controlled by the manifold and now im seeing a constant 6psi in 85degree weather.. Is this good? Its a 7psi spring...
05-04-2009, 06:24 PM
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At WOT im only hitting 6 psi max... I dunno the tune is off now tho and have to find a new tuner... mine is moving and does not have time to finish my tune.....
05-04-2009, 06:27 PM
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the waste gates not always going to be dead accurate. i have a 7psi spring and run 10psi. is it a huge gate? as long as its steady I'd call it good. if you want more use a controller.
05-04-2009, 06:55 PM
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The gate is a turbosmart 38. It seems to be steady from looking at the boost guage. I guess ill know more when I find another tuner to finish it...
05-05-2009, 03:55 PM
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Yeah im using the port on the intake where the pcv was hooked up for the reference for wastegate and using the brake booster hose for the reference for my boost guage...
