Edelbrock 60789
Thread Starter
Instructor
Joined: Aug 2016
Posts: 143
Likes: 16
From: Calgary alberta
Edelbrock 60789
Hello fellow corvette enthusiasts my car is purchased had these edelbrock heads on it when I bought it 90 auto. I'm confused the heads say hydraulic flat tappet..... the cars were produced with hydraulic roller cams. If my car has these heads would it be safe to assume the previous owner put in a flat tappet camshaft ? Im very confused ??
thanks in advance
thanks in advance
Racer
Joined: Feb 2024
Posts: 266
Likes: 112
From: New York
As oyvet mentioned, the Edelbrock 60879 heads are meant for the L98 Vette engine. The "hydraulic flat tappet" in the description on those heads just "generically" refers to the valve spring pressure rating when used with an aftermarket street performance cam. A performance roller cam requires more spring pressure than a performance flat tappet cam at high rpm to avoid valve float. An aftermarket performance roller cam that is designed to rev out to 6000rpm would require more spring pressure than what is installed on those heads. With that said, the springs in those heads will perform fine with the mild stock L98 roller cam, which has relatively low lift and makes peak power below 5000rpm.
Thread Starter
Instructor
Joined: Aug 2016
Posts: 143
Likes: 16
From: Calgary alberta
Sweet
As oyvet mentioned, the Edelbrock 60879 heads are meant for the L98 Vette engine. The "hydraulic flat tappet" in the description on those heads just "generically" refers to the valve spring pressure rating when used with an aftermarket street performance cam. A performance roller cam requires more spring pressure than a performance flat tappet cam at high rpm to avoid valve float. An aftermarket performance roller cam that is designed to rev out to 6000rpm would require more spring pressure than what is installed on those heads. With that said, the springs in those heads will perform fine with the mild stock L98 roller cam, which has relatively low lift and makes peak power below 5000rpm.
Thank you in advance
Last edited by Tvette99; Apr 27, 2025 at 07:37 PM.
