Valve adjustment?
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Supreme Member
Joined: Nov 2000
Posts: 1,069
Likes: 1
From: So. Cal, L.A.
Car: '88 Firebird Formula 350
Engine: Built 383 TPI
Transmission: Built 700r4
Axle/Gears: 9 bolt, 3.27:1 Posi
Valve adjustment?
I just dropped in a 383 roller motor into my Bird, and to make it run well, I had to adjust the lifters to almost zero lash. Is this not enough? I know on flat tappet, hydraulic lifters need to be turned down anywhere from 1/4 turn down to a full turn down. Are the rollers the same?
Supreme Member
Joined: Jul 1999
Posts: 2,149
Likes: 4
From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
Hydraulic lifters (including the factory hydraulic roller lifters) have the valve adjustment set at 1/4 turn past zero lash, at least for the hi-output motors. That is how I adjust my valves, I found this adjustment in several books I have on modifying TPI motors.
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