Preferred Cam Degree #'s 08 intake cam on 1st gen 10 - Kawasaki ZX-10R.net
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post #1 of 38 Old 08-08-2010, 02:07 PM Thread Starter
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Question Preferred Cam Degree #'s 08 intake cam on 1st gen 10

Hey Guys,

? For you Smart types..

Was Racing w/ my buddy yesterday and putting a whoopin on his R1 and we swapped bikes. After 2-3 Roll-ons he tells me my bike lost power - sure enough something was DEFINITELY WRONG with the motor - checked Power commander and the usual areas - Long story short my intake cam sprocket had slipped to where it couldn't advance further - SOOOOOO!! Im going to re-degree my cams in - Wanted to know if anyone has tried and likes any degree #'s better than the 107/103 that is commonly used with the Intake race cam and 0.45 head gasket.

I have 1st gen Bike with Usual Race Filter / M4 Exhaust / 08 race intake cam (couldnt find the 04 cam and Yes I know they're different), stock 04 exhaust cam - PC3usb blah, blah.etc. Ive never tried any other degree #s and wondered if anyone else had - and what they thought?
Thanks guys
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post #2 of 38 Old 08-08-2010, 11:51 PM
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that's not good..your cam would retard if it slipped, lucky for you that didn't give you any piston to valve clearance issues, as retarding gives you more clearance. 107/103 are good all around numbers. i set mine higher. around 109/108. this gives you more top end power. carpenter racing and web advised me to set them around 109/109. i did and was very happy. if you want to retain a little more mid range you could use 108/106.
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post #3 of 38 Old 08-09-2010, 02:00 AM
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I'm at 106/107 (decked head) and i'm happy, good midrange and top.
109's and 110's are good numbers for top.
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post #4 of 38 Old 08-09-2010, 10:53 AM
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Interesting topic. I was wondering if any one knows the stock degree #'s on the 09 zx10 and if you have made any changes?
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post #5 of 38 Old 08-09-2010, 12:50 PM
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Interesting topic. I was wondering if any one knows the stock degree #'s on the 09 zx10 and if you have made any changes?
the 08 09 zx10r cams are set a lot higher than other years. they are 111/103. this is why the 08 has a very high rpm power band. the exhaust side is still low. i here 109/109 is still a very good improvement for this bike as well.
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post #6 of 38 Old 08-09-2010, 01:33 PM
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cam degree #'s.

How much difference in top end HP are we talking about if you go from 105/105 to 109/109 ? Anybody have an idea? Mike.
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post #7 of 38 Old 08-09-2010, 04:09 PM
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How much difference in top end HP are we talking about if you go from 105/105 to 109/109 ? Anybody have an idea? Mike.
It's not just how much more hp you will make but where you will make it. You might only gain a few hp, but where your power will start to drop off after 11,000 rpm the bike will keep gaining all the way to redline with 109/109 settings. So peek hp numbers might not be much higher. You could be 8hp or so higher after 11,000rpm or so.
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post #8 of 38 Old 08-09-2010, 06:48 PM Thread Starter
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Originally Posted by zxbrian10r View Post
the 08 09 zx10r cams are set a lot higher than other years. they are 111/103. this is why the 08 has a very high rpm power band. the exhaust side is still low. i here 109/109 is still a very good improvement for this bike as well.
ZXBrian,
Why are people setting their exhaust #'s high - like you and Tasos are suggesting 109/109 or so. Doesnt an increase in the exhaust cam # broaden your torque curve but lower it? That was my understanding anyways.
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post #9 of 38 Old 08-09-2010, 11:59 PM
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ZXBrian,
Why are people setting their exhaust #'s high - like you and Tasos are suggesting 109/109 or so. Doesnt an increase in the exhaust cam # broaden your torque curve but lower it? That was my understanding anyways.
That is a common misconception, I am not sure why, I think it might have something to do with the fact that a lot of cam timing info available online, like the kind that came with my cam degree kit refer to a single cam car. where you can only advance or retard your cam. so it might say retarding your cams is good for high rpm power, well retarding raises your intake numbers, and lowers your exhaust numbers..duel cams are better because you can advance and retard independently. what you are looking for is your Lobe Separation Angle(LSA) This is the average of your 2 lobe centers. so a stock zx10 has the cams set at 104/102. take 104 plus 102 =206 then divide by 2 you get your LOBE SEPARATION ANGLE of 103. if you tighten your LSA numbers(make the number smaller) it moved the power to lower rpm. if you WIDEN your numbers(increase the number) it moved power to high rpm.
the intake cam is the most sensitive to being moved, so if you move from 104/102 to lets say 107/104 which is a common number for zx10's it moves your LSA number to 107+104 divided by 2 = (105.5) thus moving power up in the rpm range slightly. 109/109 would produce a LSA of 109 which moves power further up, passably sacrificing some low to mid range power. hope this helps and makes sense, its late and i took NyQuil. lol
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post #10 of 38 Old 08-10-2010, 12:35 AM
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As said higher cam #'s give you more power up. It all depends on what you want the bike to do, allround or top-end performance. There are usually 2 sets of aftermarket cams, allround and top. From my experience the 04 zx10 has small exhaust ports and cannot take the gases out quickly, so turning exhaust to at least 106 from 102 helps alot.
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