cam swap questions..
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: cam swap questions.. (devilfish)
If it's ground the same way as the stock then it should go in the same as the stock one came out.
If that info is not on the cam card, contact the mfg.
If that info is not on the cam card, contact the mfg.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Now how do I align it all up?
I might of gotten that backwards, I can never remember. :D
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
Re: (scorp508)
ok i got the timing mark at 0 degrees before i took the balancer off. So that should be no 1 cylinder at TDC right?
When I took the old stuff out , the crank gear marks whas at 12 o clock, and the cam gear mark whas at 12 o clock.
Should I install the new cam the same way? Its a hot cam.
Regards
When I took the old stuff out , the crank gear marks whas at 12 o clock, and the cam gear mark whas at 12 o clock.
Should I install the new cam the same way? Its a hot cam.
Regards
Burning Brakes
Joined: Dec 2000
Posts: 1,023
Likes: 0
From: Marietta, South Carolina, USA
Re: cam swap questions.. (devilfish)
You can put it in the same way as you took the other out 12-12 or you can put it in the other way 12-6, because when you are at 0 DTC both pistons are at DTC #1 and #6.
If you put it in 12-6 like I all ways doing you will have #1 fireing and #6 pushing the exhaust out but if you put it in 12-12 then you have #6 fireing and #1 pushing the exhaust out.
I like to do it 12-6 then you have them closer makes it easy to see if you have it right or not.
Jay
If you put it in 12-6 like I all ways doing you will have #1 fireing and #6 pushing the exhaust out but if you put it in 12-12 then you have #6 fireing and #1 pushing the exhaust out.
I like to do it 12-6 then you have them closer makes it easy to see if you have it right or not.
Jay
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Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
hmmm.. Does that mess up the ignition?
so crank gear spot at 12 o clock and cam gear spot at 6 o clock thats all i need to do?
so crank gear spot at 12 o clock and cam gear spot at 6 o clock thats all i need to do?
If you want once you get the timing set installed (either way) put a lifter into place for the exhaust lobes of #6 and #1. Tturn the crank clockwise and keep a sharp eye on the those two particular lifters. Whichever exhaust lifter starts to move up first is the cylinder that was in the firing position. Turn the crank back to 0* and then when you put the distributor in you want the rotor pointing at that cylinder's terminal in the cap.
Burning Brakes
Joined: Dec 2000
Posts: 1,023
Likes: 0
From: Marietta, South Carolina, USA
Re: cam swap questions.. (devilfish)
You did not say anything about the ignition, you have to have #1 fireing ( at TDC) when you put in the distributor in and the bottom has to be pointed at number one.
Degreeing a cam and just installing is two different things, installing is just to put it in and use the marks that you have and if the cam is made right then you dont have to worrie about it, but some engine builders want to know if the cam is doing right so they put a degree wheel on the engine and they make sure the cam opens and cloes at the right time.
If you have the Hot Cam it should look something like this:
Intake @050
1 BTDC befor top dead center
37 ABDC after bottom dead center
Exhaust @050
50 BBDC befor bottom dead center
-2 ATDC after top dead center
Some engine builders want to open and close the valves different then what the cam maker wants so they advance and retire it to make it open where they want.
Hope this helps
Jay
PS what ever scorp508 is saying.... :D
If you put in the 12-6 then the should be fireing so you would put the distributor so it would be fireing at #1 but if you put it in 12-12 then you have to put in the distributor with #6 fireing or turn it over and make sure you have #1 at TDC for fireing and put it in... that is what we do.
[Modified by MrJay, 12:03 PM 3/12/2003]
Degreeing a cam and just installing is two different things, installing is just to put it in and use the marks that you have and if the cam is made right then you dont have to worrie about it, but some engine builders want to know if the cam is doing right so they put a degree wheel on the engine and they make sure the cam opens and cloes at the right time.
If you have the Hot Cam it should look something like this:
Intake @050
1 BTDC befor top dead center
37 ABDC after bottom dead center
Exhaust @050
50 BBDC befor bottom dead center
-2 ATDC after top dead center
Some engine builders want to open and close the valves different then what the cam maker wants so they advance and retire it to make it open where they want.
Hope this helps
Jay
PS what ever scorp508 is saying.... :D
If you put in the 12-6 then the should be fireing so you would put the distributor so it would be fireing at #1 but if you put it in 12-12 then you have to put in the distributor with #6 fireing or turn it over and make sure you have #1 at TDC for fireing and put it in... that is what we do.
[Modified by MrJay, 12:03 PM 3/12/2003]
