Got boost?

[thomas.mcniven]

Hi guys,

I have Dizzy tuning a DHM quickspool turbo kit that I added, and we may be running into mechanical issues. I’ve checked and re-checked hose couplers and TBolt clamps, but no luck. No matter what duty cycle we put on the turbo/wastegate I’m getting 21.5 to 22.5 psi. The base tune feels nearly identical to the seventh revision. Today the base vs the newest revision yielded a difference of .01 psi.

Any idea where to start looking at potential mechanical issues? TIA


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[gtx3076]

Have you performed a compression and leak down test?

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[thomas.mcniven]

On the engine, or for boost leak?


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[gtx3076]

On the engine, or for boost leak?


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Compression test in the cylinders. When I had a cracked ringland on my ms3 I never made more than about 310whp. Leak down can tell you if there is an issue elsewhere.

https://mobiloil.com/en/article/car-maintenance/car-maintenance-archive/how-to-do-a-leakdown-test

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[Se7eN]

was anything found in the car?
I have a friend with a GT2560R which is experiencing similar issues with the boost not getting to where they want. Had a boost leak test and everything is ok.

 

[Se7eN]

Hi guys,

I have Dizzy tuning a DHM quickspool turbo kit that I added, and we may be running into mechanical issues. I’ve checked and re-checked hose couplers and TBolt clamps, but no luck. No matter what duty cycle we put on the turbo/wastegate I’m getting 21.5 to 22.5 psi. The base tune feels nearly identical to the seventh revision. Today the base vs the newest revision yielded a difference of .01 psi.

Any idea where to start looking at potential mechanical issues? TIA


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what is your WG spring presure? how many PSI?