over the deck
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Laughing Gas
Joined: Jan 2006
Posts: 883
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From: New-brunswick,Canada
over the deck
I install the zero deck TMI piston for aussie head and my piston are now 0.06 over the deck. The block was deck just to straight up. Can i have problem with this ?
Posting Guru
Joined: Jul 2007
Posts: 1,355
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those are high up! not really, just check your piston to valve clearrance with some clay if you have a 0.100 clearance on the intake and 0.080 on the exhaust you are good to go!
hey do you know how much cc do your combustion chamber has, and how many ccs do your piston have? And what cam are you using,just to check your Compression tos ee where you stand on octane...
hey do you know how much cc do your combustion chamber has, and how many ccs do your piston have? And what cam are you using,just to check your Compression tos ee where you stand on octane...
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Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
I never cc my heads but they are like 62cc. piston are 30cc, block .030 over. I use xe256 int.487 exh .493 duration 256 intake and 268 exhaust. int:22 btdc 54 abdc exh: 68 bbdc 20 atdc
Posting Guru
Joined: Jul 2007
Posts: 1,355
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look into the piston clearance first, but you could retard your cam 4 degrees that will help you..
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Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
sorry guys it was not 0.060 but 0.006 and i talk to tim about that and said the head gasket is 0.039 -0.006 over the deck=0.033 clearence. Tim said to not be closer than 0.020. He also said that should raise my compression a little bit. I hope i'm good with that.
Mountain Pass
Joined: Jan 2001
Posts: 227
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Had the same issue with my 400, new 10.5:1 cr flat tops from TMI, were about 0.005-0.006 over the deck, my heads are 2V open chamber 78 cc.
I took a standard head gasket 0.039".
The engine has done it´s first 50 miles and no problems so far ...
Watch for the right fuel because of the little extra cr depending on your cam.
I took a standard head gasket 0.039".
The engine has done it´s first 50 miles and no problems so far ...
Watch for the right fuel because of the little extra cr depending on your cam.
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Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
Just finish torking the heads. New stainless valves, springs, sceals, retainers and locks on aussie heads. I turn the crank 2 turn, so far so good. I'm in the process of installing screw in stud, a conversion kit from crane cams with roller rocker 1.7:1.
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