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jsayre914 |
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#1
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Speed Up !!! ![]() ![]() ![]() ![]() Group: Members Posts: 3,188 Joined: 10-February 08 From: Timonium MD 21093 Member No.: 8,696 Region Association: MidAtlantic Region ![]() |
I just got a email from Len Hoffman today. He is focused on producing new Heads, not rebuilding used ones anymore (IMG:style_emoticons/default/sad.gif)
Every time i do a search, it always leads to LEN. Who can I send my 2.0 heads to now?? I need to get on this 2056 build. any other recomendations??? (IMG:style_emoticons/default/confused24.gif) |
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HAM Inc |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None ![]() |
If you don't think aluminum castings fatique you need to do some research. Rapid heating (as in get in the car and hammer on it as soon as it is running) hundreds if not thousands of times takes it toll on heads. They crack for two significant reasons.
1) They are heated so fast that the associated expansion occurs at a rate faster than the area of the casting can handle . The cracks that occur under the ex seats are likely caused by this phenomana. 2) The casting fatiques and loses it's memory meaning it doesn't return to its natural state. Therefore each time the engine is heated the casting expands a little more until it cracks somewhere. I suspect this accounts in part for dropped seats and cracks around the spark plugs. For years I have used my casting oven to partially restore the heat treat of the heads. But according tot he engineers I've spoken to there is a limit to it effectiveness. And the results do not have the sustain that a fresh cating has. I'm not trying to sell anyone on my decision or castigate anyone who works on used castings or has their used castings serviced. Heck I'm willing to sell the correct parts in a kit form to anyone who wants to have their heads rebuilt. I'm just moving forward with my business, and trying to educate folks that the writing is on the wall for our cars. The salvageable inventory of used heads has shrunk to an unsustainable point. Be prepared. |
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Lo-Fi Version | Time is now: 15th June 2024 - 07:26 PM |
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