camshafts

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I posted this on another forum but figured I would here as well.

This past fathers day I cleaned up the old Javelin and replaced the fuel pump, acc pumps etc.. and got it running again because I got the itch to cruise around again. Fired it up and  I forgot how great it sounded and ran, when I built this engine back in the mid 80s I was limited to the cams available other than just "street" stuff. There was old pro stock stuff listed but unavailable and I wanted a flat tappet anyway so I wrote down a profile that I wanted and had Lunati grind a custom for me. It worked great and has been in it ever since, but now there are all kinds of new stuff around and was wondering what people are using and what works.  

Here are my old cam specs. I use 1.73 rockers on the intake and 1.6 on the exhaust so I gave the intake lift at valve with the 1.6 and the 1.73. 

                             Intake                                           Exhaust 
LSA                                                  110 
Lift @ valve           .614/.663                                          .627 
Advertised duration   302                                                312 
Duration @ .050        268                                                278 
lash                        .024                                               .024 

The engine is a 401 30 over with custom venolia pistons @ 13.5-1 compression and a UR-18 with two 750 dominators. 

Lets see what cams you all have and how do they work. 

Edited by Steve_P - Jul/09/2007 at 5:22am

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
tsanchez Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4303	Post Options Post Reply Quote tsanchez Report Post Thanks(0) Quote Reply Topic: camshafts Posted: Jul/09/2007 at 5:05am
	I posted this on another forum but figured I would here as well. This past fathers day I cleaned up the old Javelin and replaced the fuel pump, acc pumps etc.. and got it running again because I got the itch to cruise around again. Fired it up and I forgot how great it sounded and ran, when I built this engine back in the mid 80s I was limited to the cams available other than just "street" stuff. There was old pro stock stuff listed but unavailable and I wanted a flat tappet anyway so I wrote down a profile that I wanted and had Lunati grind a custom for me. It worked great and has been in it ever since, but now there are all kinds of new stuff around and was wondering what people are using and what works. Here are my old cam specs. I use 1.73 rockers on the intake and 1.6 on the exhaust so I gave the intake lift at valve with the 1.6 and the 1.73. Intake Exhaust LSA 110 Lift @ valve .614/.663 .627 Advertised duration 302 312 Duration @ .050 268 278 lash .024 .024 The engine is a 401 30 over with custom venolia pistons @ 13.5-1 compression and a UR-18 with two 750 dominators. Lets see what cams you all have and how do they work. Edited by Steve_P - Jul/09/2007 at 5:22am

74Bubblefender Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589	Post Options Post Reply Quote 74Bubblefender Report Post Thanks(0) Quote Reply Posted: Jul/09/2007 at 8:20am
	Ask any one engine builder/racer the cam profile they use and they will give you a harsh reply. Camshafts are almost the last great secret to building a great AMC V8. I will tell you this I wont pick a camshaft untill I know what my heads flow and where they flow best for the application. Like any porting professional will tell you the cam is picked and then can be modified by the rocker ratio to meet a a intake vs exhaust ratio efficiency.
	We are just about to forge new AMC V8 crankshafts.. please check here http://www.bulltear.com/forums/showthread.php?19564