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99% of dyno operators have a frankly bewildering disclaimer that basically says they could pull the head off your motor and squeeze out a giant f***ing turd inside your block and it wouldn't be their fault. For a fairly expensive "premium" service they somehow get away with murder, imagine if you took your car to a panelbeater and their disclaimer was like "we may completely ruin your paint and dent all of your panels". Although on the other hand, there's probably too much risk of shed-built piles of s*** exploding and then being blamed on the tuner.

Have you had the heads machined for the C spec Kelfords just in case? Would mean a quick swap without having to remove and strip the heads as you would otherwise.

That and I want low and mid range power with good spool so mild cams should work. the 1mm oversize should allow more flow with a lower lift and the valve train won’t have harsh profile to deal with. So no valve float at higher rpm. it’s all a guess and won’t know how high I can rev it until the tune. With stock valves B cam is good for 600hp. I can always swap cams and/or turbo out but valves etc need way more work.

You can bet your right testicle that the very first thing a dodgy tuner does when an engine goes full grenade on them is removes the previous change they made in the ECU. "Nah I just ran it up to 3000rpm and it went boom, wasn't even on boost at the time" How are you going to prove otherwise?

I thiNk there has been a case this year that they got 15k from the shop as they are professionals and the checks should have picked up most faults. if you know a lawyer you should try.

Dyno run or tune? Talk to SAS in Christchurch, they can probably help you source a motor.