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milled heads & cams

This is a discussion on milled heads & cams within the The ZX6R forums, part of the ZX6R Forum category; just like the title says im painting my bike and the motor is out of it so my question is ( my bike is a ...

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Old 07-06-2009, 09:39 AM   #1
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milled heads & cams

just like the title says im painting my bike and the motor is out of it so my question is ( my bike is a zx636 04 )

if i were to mill down the heads how much would i need to do and what size gasket would i need also port and polish them could i also use 05-06 head with there cam and valves ??

what cams will i need to install as well i see some of these people are putting cams in bike from 05-06 636 right

how much horsepower would i see out of this comb and what else would i need

thanks need all the info i can get thansk to eveyone who post
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Old 07-06-2009, 09:44 AM   #2
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if anyone has these parts for sale or know someone let me know

thanks

bump
bump
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Old 07-06-2009, 09:59 AM   #3
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you want to use the 05-06 zx6rr cams & springs, there the kawi kit cams they sell for the 03-04 models
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Old 07-06-2009, 10:29 AM   #4
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ok thanks

could i use the o6 head and valve too
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Old 07-06-2009, 10:41 AM   #5
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bump for more horsepower
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Old 07-06-2009, 11:36 AM   #6
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I'm not sure about the head swap, but I'll comment on your machining question:

If you're taking your heads to a machine shop to have them "decked" then you need to find out from them how much they took off, and then get a head gasket that is that same measurement over the stock thickness. If they take .020" off, then you need to get a gasket that is .020" thicker than the stock head gasket. You need to keep the distance between the crank and the cams the same, otherwise you'll run into valve timing issues because the tensioner won't be able to take up the extra slack later on down the road as the timing chain wears.
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Old 07-06-2009, 02:55 PM   #7
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thanks
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Old 07-06-2009, 04:28 PM   #8
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instead of shaving the head, just get a thinner head gasket, but be preparred to have to get higher octane fuel, if it starts knocking.
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Old 07-06-2009, 08:27 PM   #9
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Quote:
Originally Posted by caker_chris View Post
instead of shaving the head, just get a thinner head gasket, but be preparred to have to get higher octane fuel, if it starts knocking.
it WILL start knocking. you're changing your compression ratio, so you'll get a little more power, but the problems that come along with aren't worth it.
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Old 07-07-2009, 06:54 AM   #10
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about how much hp would i see if i shaved it thinner gasket and 03-04 zx6rr cams

im thinking around 20-25 hp with a good map and bolt ons
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Old 07-07-2009, 06:17 PM   #11
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Quote:
Originally Posted by ZoomSplat View Post
it WILL start knocking. you're changing your compression ratio, so you'll get a little more power, but the problems that come along with aren't worth it.
not nessarilly, depending on how much it changes, in most places in the states i noticed, the octane rating on super or premium gas is atleast 94 and the bike stock only needs 90 so it might still be good on premium fuel without an octane booster or race gas

but it is a risk you have to be willing to take, best thing to do if you are serious about increasing the compression ratio is to contact kawasaki and find out from them what octane you would need.
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Old 07-07-2009, 10:02 PM   #12
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The highest I've seen around here is 91, but that's the people's republic of california and they're afraid to let people have any fun. I forget what it was back east but I think they had 93 at most stations.

I had a hot rod magazine a while ago that had a big long article about bumping up compression through various methods like stroke and thinner head gaskets and domed pistons; they had a formula to figure out what octane you'd need to run...I ran the numbers and it said that my Tacoma would knock at about 5 lbs of boost when running on 91, so I got in the truck and tested it out, and it was pretty accurate. I don't remember the formula to figure out compression ratio vs octane, and have since misplaced that magazine, but I'm sure someone could find it with a bit of googling.
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Old 07-07-2009, 10:04 PM   #13
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Quote:
Originally Posted by wheelies247 View Post
about how much hp would i see if i shaved it thinner gasket and 03-04 zx6rr cams

im thinking around 20-25 hp with a good map and bolt ons
yeah maybe about 5, 10whp pushing it
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Old 07-08-2009, 08:46 AM   #14
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Quote:
Originally Posted by wheelies247 View Post
about how much hp would i see if i shaved it thinner gasket and 03-04 zx6rr cams

im thinking around 20-25 hp with a good map and bolt ons
i would say around 10rwhp with a good tuner
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Old 07-08-2009, 09:25 AM   #15
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Quote:
Originally Posted by ZoomSplat View Post
The highest I've seen around here is 91, but that's the people's republic of california and they're afraid to let people have any fun. I forget what it was back east but I think they had 93 at most stations.
.

Yeah I hated that when I was in CA.... I'm in VA and we get the good ol 93 everywere ...... With that being said I would gladly trade that extra 2 oct for the weather and damn near every other asspect of SoCal.

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