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Location:
Melbourne
Registered:
January 2003
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Re: 4agte head torque settings with ARP studs?
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Sun, 07 August 2005 09:51
 
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Yeah will be interesting to see how much they over torque the head in true US overkill style , wonder how long the piston and rings last in a oval 4ag block ,75% of 190.000 psi = 142500psi thats still not 60nm . Did they just randomly pick a figure because there workings really dont make sense
More pressure with the expansion of the head etc under the normal rules applying to expansion of alloy with heat will out result in : more pressure being applied on the heat gasket working the gasket with every change between hot and cold , and more pressure on the block fixing points causing distortion of the block . With metal head gasket don't be surprised in those stages for there to be leakage especially coolant , externally and if you do have a fibreoptic lighted view you might be able to see internally in the cylinder as the two metals contract at different rates .
Should toyota have fitted stud and a higher loading ? well i think there engineers would have been light years ahead of some small company selling what is really just aircraft grade materials , nothing new that changes the rules of engine building .
Basically if you think a stronger grade of material and a higher torquing is going to stop a turboed 4ag from blowing headgaskets , you need to research the other causes of blown headgaskets in all high output engines . Maybe start with cosworth since the 4age is near a complete rip off in the combustion area and the valve base . They didn't just throw more material or strong material or more force to the headgasket at the problem when going for 300hp per litre.
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| | Subject | Poster | Date |
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4agte head torque settings with ARP studs?
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Big T | Sat, 06 August 2005 11:47 |
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Re: 4agte head torque settings with ARP studs?
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cri_ag | Sat, 06 August 2005 16:30 |
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Re: 4agte head torque settings with ARP studs?
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Big T | Sat, 06 August 2005 23:02 |
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Re: 4agte head torque settings with ARP studs?
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takai | Sat, 06 August 2005 23:37 |
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Re: 4agte head torque settings with ARP studs?
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Big T | Sat, 06 August 2005 23:53 |
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Re: 4agte head torque settings with ARP studs?
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improvedae86 | Sun, 07 August 2005 01:40 |
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Re: 4agte head torque settings with ARP studs?
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takai | Sun, 07 August 2005 03:49 |
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Re: 4agte head torque settings with ARP studs?
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Big T | Sun, 07 August 2005 08:24 |
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Re: 4agte head torque settings with ARP studs?
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Allan | Wed, 10 August 2005 10:14 |
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Re: 4agte head torque settings with ARP studs?
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improvedae86 | Sun, 07 August 2005 09:51 |
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Re: 4agte head torque settings with ARP studs?
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Big T | Wed, 10 August 2005 09:55 |
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Re: 4agte head torque settings with ARP studs?
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Big T | Wed, 10 August 2005 11:00 |
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Re: 4agte head torque settings with ARP studs?
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mrshin | Wed, 10 August 2005 12:36 |
