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| Cam centerline https://slantsix.org/forum/viewtopic.php?t=22048 |
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| Author: | HyperValiant [ Tue Feb 27, 2007 7:41 pm ] |
| Post subject: | Cam centerline |
I just received my Erson 270 cam and lifters today and every thing looks good as far as oiling holes and overall appearance. My question is where do I find what centerline to install it at.I have the cam card and there is a note at the bottom that says 111+4.My Comp 264 installs at 106 centerline but Im not familiar with the way the Erson cam card is layed out. Any help or advice is appreciated and wecome. Thanks HyperValiant |
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| Author: | Dart270 [ Tue Feb 27, 2007 9:00 pm ] |
| Post subject: | |
No matter what the cam card says, I would not install it at higher than 104 deg. 111+4 probably means it's 111 LSA and ground 4 deg advanced, so it would be 107 straight up. Again, that is still too far retarded. If it were my car, I would put it at 101 or 102. Lou |
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| Author: | argentina-slantsixer [ Wed Feb 28, 2007 2:55 pm ] |
| Post subject: | |
Erson grinds their cams with 4º advance already "built in". You should centerline the cam as cam card says. |
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| Author: | HyperValiant [ Wed Feb 28, 2007 8:12 pm ] |
| Post subject: | |
Lou can you explain how you came up with the 107 number from the 111+4 number.I would like to know so I can understand more about cam degreeing. Thanks HyperValiant |
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| Author: | Dart270 [ Wed Feb 28, 2007 9:47 pm ] |
| Post subject: | |
I am just guessing since "+" usually means advanced and 111 is probably the LSA (same as centerline if cam is ground straight up). I still think you should install it at 102 or so. Lou |
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| Author: | HyperValiant [ Wed Feb 28, 2007 10:30 pm ] |
| Post subject: | |
Lou ,I think your right about 111+4,I have been reading the cam card closer and understanding it a little more. As far as dgreeing the cam with more advance,when I installed the 264 Comp in my Hyperpak 170 it fell in at 105.5 with a 4 dgree bushing,now Im wondering if I should have put in a 6 or 8 bushing.If I think I need more cam advance after driving it can I just tear down the front of the engine and install a different bushing or do I need to re-degree the cam? HyperValiant |
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| Author: | Dart270 [ Thu Mar 01, 2007 3:21 am ] |
| Post subject: | |
Oh, I'm sorry, you have a 170. In that case, I'd degree it as the cam card says. I believe one of the reasons for more advance is the 225s small bore/stroke ratio, where the 170 has a high bore/stroke. Yes, you can just put in a different bushing later rather than re-degreeing the cam. Lou |
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| Author: | HyperValiant [ Thu Mar 01, 2007 8:02 pm ] |
| Post subject: | |
Lou ,thanks for the reply but I think I confused you.The Erson cam is for a 225 that I plan on putting in my Dart.I guess I was comparing apples to oranges between the 170 in my Val and the 225 Im gathering parts for. I would like to talk to you at a later date about head mods for the Dart engine. Thanks Mark |
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