Instron tensile test: stock headstuds Vs. ARP headstuds
find someone at a university and give them a few of each to pull apart. i'm sure they would do it 
can we buy just 2-3 studs?
we are not allowed to ask ARP for a few for independent testing purposes because they can screen them so we get "perfect" studs, whereas a normal box might contain a few "less-then-perfect" studs. likewise for mistu factory studs.
anyone have a couple lying around?
we are not allowed to ask ARP for a few for independent testing purposes because they can screen them so we get "perfect" studs, whereas a normal box might contain a few "less-then-perfect" studs. likewise for mistu factory studs.
anyone have a couple lying around?
If I were still in school, I would do it. I have a Materials Engineering degree, but that last time I was in school was '97.
Anyway, you shouldn't have to do any kind of testing. All you need to know is the alloy and any heat treatments, etc. You can simply look up the tensile strength from a table that I'm sure you can find through Google.
Actual testing will simply show if one particular piece wasn't heat treated properly or had defects, etc.
Also, the stock headbolts are torque-to-yield bolts, I believe, meaning that they are installed to actually have them tightened up to their yield point, so that they will actually stretch. This is why stock head bolts cannot be reused.
Eric
Anyway, you shouldn't have to do any kind of testing. All you need to know is the alloy and any heat treatments, etc. You can simply look up the tensile strength from a table that I'm sure you can find through Google.
Actual testing will simply show if one particular piece wasn't heat treated properly or had defects, etc.
Also, the stock headbolts are torque-to-yield bolts, I believe, meaning that they are installed to actually have them tightened up to their yield point, so that they will actually stretch. This is why stock head bolts cannot be reused.
Eric
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If I were still in school, I would do it. I have a Materials Engineering degree, but that last time I was in school was '97.
Anyway, you shouldn't have to do any kind of testing. All you need to know is the alloy and any heat treatments, etc. You can simply look up the tensile strength from a table that I'm sure you can find through Google.
Actual testing will simply show if one particular piece wasn't heat treated properly or had defects, etc.
Also, the stock headbolts are torque-to-yield bolts, I believe, meaning that they are installed to actually have them tightened up to their yield point, so that they will actually stretch. This is why stock head bolts cannot be reused.
Eric
Anyway, you shouldn't have to do any kind of testing. All you need to know is the alloy and any heat treatments, etc. You can simply look up the tensile strength from a table that I'm sure you can find through Google.
Actual testing will simply show if one particular piece wasn't heat treated properly or had defects, etc.
Also, the stock headbolts are torque-to-yield bolts, I believe, meaning that they are installed to actually have them tightened up to their yield point, so that they will actually stretch. This is why stock head bolts cannot be reused.
Eric
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