4.0L HO Jeep Engine Build
The conical valve springs from early to late heads ARE interchangeable. I have reason to believe that the late springs are about 10 lbs. stronger on the seat. I have a set of low mileage springs and these look fine after a clean up.
Time to get back to work and be productive. I'm presently assembling the short block and will be cc'ng the pistons and deck. I want to get a true measured compression ratio. Stock per the Jeep specs is 8.8:1. I'm shooting for 9.5:1 but I'm hoping that with all the decking I did to get my quench where I wanted it, I don't end up with a 10.5:1 CR. Using race gas in a daily driver would blow, lol. This may end up being an e-85 build......
The conical valve springs from early to late heads ARE interchangeable. I have reason to believe that the late springs are about 10 lbs. stronger on the seat. I have a set of low mileage springs and these look fine after a clean up.
Time to get back to work and be productive. I'm presently assembling the short block and will be cc'ng the pistons and deck. I want to get a true measured compression ratio. Stock per the Jeep specs is 8.8:1. I'm shooting for 9.5:1 but I'm hoping that with all the decking I did to get my quench where I wanted it, I don't end up with a 10.5:1 CR. Using race gas in a daily driver would blow, lol. This may end up being an e-85 build......
