SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: KonaCole on November 14, 2007, 09:20:57 AM
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I am trying to find out what the stock HP was for my 455 olds. I know that olds offered them in the range of 310 to 390. Mine is a 1971 with G heads and it is a Hardin Marine equiped engine. Any ideas?
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I would say it was 390 but how old is it and how much run time ???
"G" heads 409100 casting 80cc Generic big valve heads ;D
2sav
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I was thinking that it would be 390 b/c it is a marine engine. I believe that it has about 300 hrs on it. I am having it rebuilt, so I am hoping to build about 400 and it be reliable.
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Make sure if its not already done, you have restricters installed and open the oil passages for a better drain back to the pan ;D
Have you checked out Mondello's? they got some really cool stuff for the Olds.
2sav
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I bought the restrictor kit that Mondello sells and I was going to talk to my machinist about the oil returns. From what I've read, that should allow me to turn 5000 rpms whit not problem ;D, but I do not want to look like this :'(, if I am wrong!
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I bought the restrictor kit that Mondello sells and I was going to talk to my machinist about the oil returns. From what I've read, that should allow me to turn 5000 rpms whit not problem ;D, but I do not want to look like this :'(, if I am wrong!
They have them for the main's and lifter's but you can always just run restricted pushrods.
These restricters were made for racing so you should be fine
I only had them in the main's
2sav
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The kit I bought came with a 10 qt pan, pump, pick up, main restrictors and restricted cam bearings. It was like $550.00, but it seemed like a good deal when you start adding the cost of all the parts seperatly.