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| Adjusting a cam tooth on l20b http://www.ozdat.com.au/forum/viewtopic.php?t=34084 |
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| Author: | adz1600 [ Thu Jan 14, 2016 5:49 pm ] |
| Post subject: | Adjusting a cam tooth on l20b |
Hi all L20 motor just interested has any one tried this to get more torque if so how much of a diffrence ... |
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| Author: | yellow1600 [ Fri Jan 15, 2016 6:15 am ] |
| Post subject: | Re: Adjusting a cam tooth on l20b |
Count the number of teeth on the sprocket, divide that number by 360 and that will give you the exact number in degrees a full tooth movement would be. I'm told that the a,b and c adjusters are around 2 degrees each and I did try that once and I didn't notice any difference. Also if you do try a full tooth make sure the valves won't hit the piston. |
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| Author: | adz1600 [ Fri Jan 15, 2016 11:24 am ] | |
| Post subject: | Re: Adjusting a cam tooth on l20b | |
Count the number of teeth on the sprocket, divide that number by 360 and that will give you the exact number in degrees a full tooth movement would be. I'm told that the a,b and c adjusters are around 2 degrees each and I did try that once and I didn't notice any difference. Also if you do try a full tooth make sure the valves won't hit the piston.
Thanks heaps for the reply ,when I built the motor I ran out of cash and used just a standard cam,I've spent enough money on it so might have to find a second hand cam,
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| Author: | Baz [ Fri Jan 15, 2016 9:37 pm ] |
| Post subject: | Re: Adjusting a cam tooth on l20b |
The first thing you need to do is establish the EXACT tdc of your engine. You will need a tool for this. It is not uncommon to find the indicator misaligned with the TDC mark on the pulley. 4 degrees will make a huge difference The holes in the standard sprocket will move the valve timing by 4 degrees. The 8 hole works sprocket is 3degrees per hole. L series are very sensitive to valve timing. Having your TDC mark set right is imperative. Like building a house. If the foundation is not right the house will never be. http://www.datsport.com/Camshaftspec.html adz1600 check the back of your cam for a letter stamped on the cam.... It should be a B. |
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| Author: | adz1600 [ Fri Jan 15, 2016 10:19 pm ] | |
| Post subject: | Re: Adjusting a cam tooth on l20b | |
The first thing you need to do is establish the EXACT tdc of your engine. You will need a tool for this.
[/It is not uncommon to find the indicator misaligned with the TDC mark on the pulley. 4 degrees will make a huge difference The holes in the standard sprocket will move the valve timing by 4 degrees. The 8 hole works sprocket is 3degrees per hole. L series are very sensitive to valve timing. Having your TDC mark set right is imperative. Like building a house. If the foundation is not right the house will never be. http://www.datsport.com/Camshaftspec.html adz1600 check the back of your cam for a letter stamped on the cam.... It should be a B. Thanks heaps baz it is a B stamped on the cam, I have a 8 hole sprocket so I will swap it over and see what change I can get with it I'll let you know Thanks again |
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