1HDT TD05-16GL Slow to spool

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Joined
Jul 1, 2025
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Location
Wellington NZ
Hi guys, I've installed an arashi td05-16 large on my 1HDT and it's seems awfully slow to spool, doesn't hit full boost of 19psi (I've installed a boost tee.) Till after about 2100rpm and even drops boost between 3rd and 4th which cause egts to spike up. Max egts under load on a hill are about 685 pre .
I've done injectors 3 inch exhaust and big end bearings recently. Any ideas please?
 

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