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Location:
brisbane
Registered:
August 2002
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Location:
deloraine tas
Registered:
September 2004
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Re: fly cutting 3tc to suit 3tgte head
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Sun, 08 May 2005 12:14
 
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a 3tgte is a turbo motor why would you want to use na pistons? maybe if you deck the hight of the pistons then i dont see why you cant use them. does any one elce have any idea????
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Location:
brisbane
Registered:
August 2002
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Re: fly cutting 3tc to suit 3tgte head
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Sun, 08 May 2005 18:09
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there turbo pistons they've got a comp. ratio of 8.8
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Location:
Devonport Tasmania
Registered:
June 2004
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Re: fly cutting 3tc to suit 3tgte head
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Sun, 08 May 2005 23:01
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factory cast pistons blow more often than a hooker in thailand, so i reakon the 3tc flycuts would too.
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Location:
On your mum!
Registered:
May 2002
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Re: fly cutting 3tc to suit 3tgte head
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Mon, 09 May 2005 03:01
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factory 3T GTE has a comp ratio of 7.8:1
Running forgies to suit a 3TC is fine.
If you get the flat top 87mm 3TC forged pistons from Wiseco, they have sufficiently deep valve notchs.
You could mill (or turn) the comp dome down on a forged NA replacement piston in order to tailor the CR if it came to it.
One would be left asking why?
Lesson for today - flycutting is a milling process using a single point cutting tool. When decking cylinder heads and blocks for example "a flycutter" is used.
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Location:
brisbane
Registered:
August 2002
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Re: fly cutting 3tc to suit 3tgte head
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Mon, 09 May 2005 05:56
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they are aries 89mm forged pistons. i was just seeing if i had to do anything to the pistons as they are for single cam 3tc and not the twin cam 3tgte. so is there any differance, or can i use these forged 3tc pistons in the 3tgteu without any hassels?
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Location:
On your mum!
Registered:
May 2002
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Re: fly cutting 3tc to suit 3tgte head
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Mon, 09 May 2005 06:23
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just check the piston to valve clearance by using some plasticine. Place a nice disc of plasticine on the piston top (about 3-4mm thick) dummy assemble the engine and trun it over. take the head off and check where the vavle has touched. Cut throught the plasticine in the thinnest area (using a plastic knife) and measure how much clearance that you have (3.0mm is a good safe clearance).
Having said all of that - finding blocks that will go out to 89mm is not all that easy.
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Location:
brisbane
Registered:
August 2002
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Re: fly cutting 3tc forged pistons to suit 3tgte head
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Mon, 09 May 2005 07:28
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cheers for that yellorolla, ill do that when i get the block back from bryant engineering.
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Location:
Redbank Plains,near Ipswi...
Registered:
May 2002
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Re: fly cutting 3tc to suit 3tgte head
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Mon, 09 May 2005 12:13
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it depends on the psiton design. I tried this recently on a weisco set. the dome was too thin. I ended up buying a custom set.
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Location:
On your mum!
Registered:
May 2002
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Re: fly cutting 3tc forged pistons to suit 3tgte head
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Mon, 09 May 2005 12:22
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terryobeirne - good point. According to something that I read piston crown thickness should be >6% of the bore dia.
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