I just bought F1 springs today. Is there anything else needed to run 4000 RPMs?

 

Nope, you should be good

 

Just be sure to do 3 good heat cycles on your springs before a test drive, then recheck valvelash & hammer down. Only thing you may want to consider is a coolant bypass kit, Enterprise Engines sells a nice kit for $150. A Flluidamper is another good idea.

 

coolant bypass kit? whats that do? give the coolant a way around the thermostat?

 

When you turn higher rpms, your pressure in the coolant system rises & can pop the freeze plug out of the back of the block [most common]. The bypass kit has a pressure relief valve which opens when you reach a set pressure & reroutes the coolant back to the upper radiator hose. Some guys even clip/trim the blades on their water pump so that it doesn't build as much pressure.

 

Your going to need a redline box to!

 

anyone have a link to this by pass kit?

 

truck is a 97 12v

 

You have to call enterprise engines [EEP] & talk to them directly, not listed on the website. www.enterpriseengine.com