The racing fan is caused by not having a hard drive with Apple’s proprietary heat sensor. This can be cured by using an OWC thermal sensor
https://eshop.macsales.com/item/OWC/DIDIMACHDD09/?fullDetails&customer-reviews&gclsrc=aw.ds&&gclid=CjwKCAjw0On8BRAgEiwAincsHFnMVqrSJCkbR9Xyh9GKAlGTr4X20Snt2mgYOST7ROZAKsqUs0qkNxoC8rEQAvD_BwE