cam timing - 1 tooth = how many degrees?
Thread Starter
Joined: Jan 2005
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From: Humble Texas
cam timing - 1 tooth = how many degrees? i was setting up to check P2V on my LS2 and decided to check the degree on my cam for the hell of it. it came out to 100. i dont have my cam card in front of me but it should be 106 to 110 area....the cam is a howards 236/242 .612/.612 110 LSA. i dont know if it has any advance ground into it but i know 100 is not right. the cam is sitting dot to dot. how much degree change should I see by moving it over 1 tooth?
this is the closest thing to a cam card that i can find. anyone know what it should measure?
this is the closest thing to a cam card that i can find. anyone know what it should measure?
i was setting up to check P2V on my LS2 and decided to check the degree on my cam for the hell of it. it came out to 100. i dont have my cam card in front of me but it should be 106 to 110 area....the cam is a howards 236/242 .612/.612 110 LSA. i dont know if it has any advance ground into it but i know 100 is not right. the cam is sitting dot to dot. how much degree change should I see by moving it over 1 tooth?
this is the closest thing to a cam card that i can find. anyone know what it should measure?
this is the closest thing to a cam card that i can find. anyone know what it should measure?
What do you mean it came out to 100? what came out to 100? the ICL?
If you think your cam has a 110LSA and you are measuring 100 ICL then you are advanced 10*. off the top of my head without doing the math i think a tooth is worth 16*
what timing set do you have?
Thread Starter
Joined: Jan 2005
Posts: 15,713
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From: Humble Texas
it's the stock LS2 timing set put dot to dot. i found the cam card online. my cam is supposed to be a 110+4 LSA which would give me a 106 ICL. my measurements are showing 100 and it is definately dot to dot. i moved the cam gear one tooth and it dropped to 85ish.
wouldnt it be 6* retarded if it's at 100 and should be at 106? is a 6* difference big enough to call up howards and ask what the heck is up?
wouldnt it be 6* retarded if it's at 100 and should be at 106? is a 6* difference big enough to call up howards and ask what the heck is up?
it's the stock LS2 timing set put dot to dot. i found the cam card online. my cam is supposed to be a 110+4 LSA which would give me a 106 ICL. my measurements are showing 100 and it is definately dot to dot. i moved the cam gear one tooth and it dropped to 85ish.
wouldnt it be 6* retarded if it's at 100 and should be at 106? is a 6* difference big enough to call up howards and ask what the heck is up?
wouldnt it be 6* retarded if it's at 100 and should be at 106? is a 6* difference big enough to call up howards and ask what the heck is up?
to change the camshaft timing you either need an adjustable timing set or offset bushings.
also the more the camshaft is advanced the sooner the valve events take place. so at 10* advance your intake valve will be opening 10* sooner will also be closing 10* sooner (the LSA doesn't change just the ICL and ECL) This may cause some cylinder pressure issues (low compression test numbers) or even PTV issues if clearances are tight.
also the more the camshaft is advanced the sooner the valve events take place. so at 10* advance your intake valve will be opening 10* sooner will also be closing 10* sooner (the LSA doesn't change just the ICL and ECL) This may cause some cylinder pressure issues (low compression test numbers) or even PTV issues if clearances are tight.
Last edited by 3rdCoastPowerSports; Aug 12, 2012 at 03:08 PM.
Thread Starter
Joined: Jan 2005
Posts: 15,713
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From: Humble Texas
i dont care to try and advance it or anything...i want it to line up the way it was supposed to. i would be fine with anything in the 105-107 range. this thing is 6* off. so basically i have to get an adjustable timing set to get this thing where it belongs...is this a common problem with howards cams?
i dont care to try and advance it or anything...i want it to line up the way it was supposed to. i would be fine with anything in the 105-107 range. this thing is 6* off. so basically i have to get an adjustable timing set to get this thing where it belongs...is this a common problem with howards cams?
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i dont care to try and advance it or anything...i want it to line up the way it was supposed to. i would be fine with anything in the 105-107 range. this thing is 6* off. so basically i have to get an adjustable timing set to get this thing where it belongs...is this a common problem with howards cams?
It can and does happen, with any brand of cam. The cam itself might not be off the full 6 degrees, but the crank might be off 2, the cam off 2, and timing set off 2. or any combination of the above, etc. If you are sure you checked the ICL correctly and it is really 100 I would definitely try and retard it back to 106 or so or your top end power will suffer somewhat. 10 degrees advanced is quite alot.
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Joined: Jan 2005
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From: Humble Texas
i just dont see how it can be THAT common. wouldnt a T-rex sized cam run into T2V issues if the ICL was off by that much? tons of guys just toss them in dot to dot and button them up.
the combo is a trickflow 225 headed ls2 with a single plane intake and 4600 stall so i need it all up top lol. what's the cheapest way of retarding the cam. the cam is new, but i am the 2nd owner. i doubt they will do anything for me because of that.
the combo is a trickflow 225 headed ls2 with a single plane intake and 4600 stall so i need it all up top lol. what's the cheapest way of retarding the cam. the cam is new, but i am the 2nd owner. i doubt they will do anything for me because of that.
Thread Starter
Joined: Jan 2005
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From: Humble Texas
does it matter where i measure from? i measured from the tip of the pushrod but an article on the comp cams website says to do it from the spring retainer. wouldnt the rocker ratios mess with the numbers when doing it from the spring retainer??
i just dont see how it can be THAT common. wouldnt a T-rex sized cam run into T2V issues if the ICL was off by that much? tons of guys just toss them in dot to dot and button them up.
the combo is a trickflow 225 headed ls2 with a single plane intake and 4600 stall so i need it all up top lol. what's the cheapest way of retarding the cam. the cam is new, but i am the 2nd owner. i doubt they will do anything for me because of that.
the combo is a trickflow 225 headed ls2 with a single plane intake and 4600 stall so i need it all up top lol. what's the cheapest way of retarding the cam. the cam is new, but i am the 2nd owner. i doubt they will do anything for me because of that.
Exactly how are you setting things up? Do you have a solid lifter or using a hydraulic?
The best way I have found to degree the cam is to use a solid lifter and a dial indicator with a long enough adapter to land in the lifter cup/plunger. This will eliminate any variance with the push rod or lifter changing on you.
The best way I have found to degree the cam is to use a solid lifter and a dial indicator with a long enough adapter to land in the lifter cup/plunger. This will eliminate any variance with the push rod or lifter changing on you.
Thread Starter
Joined: Jan 2005
Posts: 15,713
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From: Humble Texas
Exactly how are you setting things up? Do you have a solid lifter or using a hydraulic?
The best way I have found to degree the cam is to use a solid lifter and a dial indicator with a long enough adapter to land in the lifter cup/plunger. This will eliminate any variance with the push rod or lifter changing on you.
The best way I have found to degree the cam is to use a solid lifter and a dial indicator with a long enough adapter to land in the lifter cup/plunger. This will eliminate any variance with the push rod or lifter changing on you.
add those numbers and divide by 2.
Thread Starter
Joined: Jan 2005
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From: Humble Texas
i just called up howards cams. they picked up on the first ring and told me to send that cam back to them ASAP. i said it wasnt a big deal as i wasnt in any kind of huge hurry and he said "i am. i dont like to see incorrect parts and i want to fix this ASAP." Definately the kind of customer service everyone should strive to provide. just wanted to give credit where it was due!
Thread Starter
Joined: Jan 2005
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From: Humble Texas
howards called today and said they measured the cam and i was correct. they are grinding a new one and sending it my way. cant beat a company with great customer service.
I agree 100%. Everyone makes mistakes but not every one is man enough to own the mistake and make it right. Awesome to hear
Thread Starter
Joined: Jan 2005
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From: Humble Texas
they did not ask how i measured...basically he said send it back asap. once in their hands they measured and called and admitted that it was ground wrong. apologised and said it should have been caught in QC and will have a new one in route on friday. every company will screw up from time to time. it's how they handle the screw ups that get my business.