429 Maximum Cam Lift
Thread Starter
|
New User
Joined: Dec 2006
Posts: 5
Likes: 0
From: Connecticut Dragway
429 Maximum Cam Lift
So I'm starting with a stock 10.5:1 1968 429 Thunderjet. Plans are for electronic ignition, two race tuned 600cfm Holleys on a Buddy Bar Casting low-rise manifold, solid lifter cam, ported exhaust, polished int./exh., milled heads (11.5:1) and custom made headers. The big question is, how big of a cam can I get without valve clearance issues? Its mainly for car shows and drag racing, so I dont mind fighting with it once and a while on the street. Whats physically the biggest cam I can get away with? Thanks,
-Dean
-Dean
Senior User
Joined: Mar 2005
Posts: 117
Likes: 0
You'll need valve reliefs in the piston, especially with milled heads. Your best bet would be to get in contact with comp or crane or whoever you like, tell them your combination and your plans for the vehicle for a custom grind cam. Bigger is not better with cams.
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
There is not such thing as max lift, it depends on many factors such as the installed height and length of the springs, whether you milled the guides down to allow more clearance, the valve reliefs in the pistons, on and on. best thing to do on something like that is get a flow sheet on your heads and work the cam up based on that and your intended use and RPM range.
Thread
Thread Starter
Forum
Replies
Last Post
huntinfool87
1967 - 1972 F-100 & Larger F-Series Trucks
6
Feb 22, 2017 09:50 PM
J ballan
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
9
Oct 9, 2016 05:07 PM
itsabullitt
1967 - 1972 F-100 & Larger F-Series Trucks
23
Aug 16, 2016 09:21 PM
rudifisk
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
1
Jul 2, 2015 12:05 PM
rudifisk
1973 - 1979 F-100 & Larger F-Series Trucks
0
Jun 28, 2015 01:21 AM
