StuartW Posted June 4, 2013 Share Posted June 4, 2013 Hi Y'all I had some Trauma last weekend and scorched the cylinder head on the Drag car. I have a guy ready to weld it up but he needs to know what grade of aluminium the head is I do not have a clue But am keen to find out please or is there any way i could find out without too much hassle please? I have been warned off having it heat treated as it 'could' loosen the valve seats..any opinions greatly received..Discuss away... Thanks Stu Link to comment Share on other sites More sharing options...
Guigsy Posted June 4, 2013 Share Posted June 4, 2013 im pretty sure there is a fancy gadget that you put on and it tells you. local scrappy/recycle yard might have one? Link to comment Share on other sites More sharing options...
Swampy442 Posted June 4, 2013 Share Posted June 4, 2013 Just get a new head? Link to comment Share on other sites More sharing options...
mihai Posted June 4, 2013 Share Posted June 4, 2013 0-60 1.23 seconds ??????? Link to comment Share on other sites More sharing options...
Chris Bailey Posted June 4, 2013 Share Posted June 4, 2013 That got a little hot? Link to comment Share on other sites More sharing options...
Noz Posted June 5, 2013 Share Posted June 5, 2013 im pretty sure there is a fancy gadget that you put on and it tells you. local scrappy/recycle yard might have one? It's called PMI testing. personal material indentification. It uses radiation to measure the materials structure. It needs to be on clean and I mean CLEAN surface area or it picks up on dirt. Sadly that will only tell you the material chosen. It can't tell you the hardening process. The best thing to do is hardness test it as well as knowing the material. Two completely different hardness blocks could have the same material structure so sadly material indentification can't help you with the hardness or heat-treatment process from manufacturing. Link to comment Share on other sites More sharing options...
StuartW Posted June 5, 2013 Author Share Posted June 5, 2013 I DO have a replacement partly built cylinder head on route but want to see if I can redeem anything from the old head as I have invested so so much time and cost into having it ported, Valve seat job, New Guides, Double valve springs etc etc etc! Link to comment Share on other sites More sharing options...
spidermonkey Posted June 6, 2013 Share Posted June 6, 2013 PMI will only tell you the chemical composition of the aluminium (ie percentages of base/trace materials) you would then need to match this up to a known spec to find the grade. Link to comment Share on other sites More sharing options...
StuartW Posted June 17, 2013 Author Share Posted June 17, 2013 Thanks for all the informative and technical replies. Still not any the wiser though :-( may e if someone could suggest a good race car welder/specialist? Link to comment Share on other sites More sharing options...
antno Posted June 18, 2013 Share Posted June 18, 2013 Rob walker engineering. They weld up heads that look scrap. Then machine them to fit seats guides ect. All the old Subaru wrc stuff that came from Japan. Link to comment Share on other sites More sharing options...
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