402 and valve float at 6300
Launching!
Joined: Sep 2009
Posts: 260
Likes: 0
From: greensboro, nc
The problem is not so much the weight of the rockers even though the crane rockers are heavy. Its that your using the 1.8 rocker on a cam that is already has a fast lobe ramp it simply opens the valve faster than your springs can control the valve train. You should put the 1.7 rockers on and new set of springs and go play.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Launching!
Joined: Sep 2009
Posts: 260
Likes: 0
From: greensboro, nc
The pac 1521 outer spring has the same dimension as your Patriot Retainer and the inner step on the Patriot retainer is smaller than the pac inner spring is. It will locate of the outer spring and run fine. Its just a tight fit. With your cam and a 1.7 rocker you should have .613 lift I would install these spring at 1.770 instead of the 1.800 the spring will you have better seat pressure and push the spring closer to its coil bind. This reduces harmonics in your valve train. It will also give you the control you need and help the life of the spring. You will need to also purchase .030 shims to achieve the 1.770 install height
