On to address this, in my book it is always best to upgrade the fuel system first. Especially if running ethanol.
You can run a car and run out of turbo no problem. But run out of fuel that is reckless and extremely dangerous for the engine.
And to answer the OP’s question, just because they...
in my opinion if you don’t have great fuel available and don’t want to upgrade your fuel system stay with a stock turbo.
The normal kuro can be ran with a stock fuel setup but you will be leaving power on the table since the fuel demand is beyond what the oem system can accommodate.
I will chime in later on this. But I’m very aware of the issue at hand.
I recommend the full race pump to all my customers. But the line issue is concerning. I’m doing some research into this.
I just did a 570+ car on stock clutch and so far it is holding fine for the time being. Torque is around 450. Trick is to not lug the engine and create a high load low rpm situation when the torque hits. That initial stress is brutal. But eventually the stock clutch will fail.
Had a customer with a similar issue. We ended up doing a direct wire kit towards the pump, with new cannister and fuel pump and that solved the issue. Check the electrical feed to the pump.