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Old 01-19-2005, 07:37 PM
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Question first post-hello-timing gear question

Hello all, I'm new tonight with a real question. Thanks in advance.
I purchased a 426 hemi that the engine builder put Pete Jackson timing gears in. To lub the gears he drilled an 1/8 hole in the oil passage right behind the gears to "spray" on them. To compensate for the pressure drop he installed a high volume oil pump. The pressure dropped 10-12 psi at idle but "ran" 90 cold and 45-50 hot. I did not like this so I installed a .060 carb. jet to reduce the hole dia. but it didn't do as much as I liked. It only gave me about 5 psi better. Question: should the gears get enough oil the traditional way that the "old" chain would have gotten oiled. I want to plug the hole and use all my pressure. Note: car was built in Miss. There is no "bringing it back for him to fix".
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Old 01-19-2005, 09:52 PM
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Welcome to the board. You are new so don’t know the ins and outs yet. This forum is intended for general introductions only. Tech questions posted here don’t get the coverage they deserve. Repost your question in the proper forum and it will have a good chance of being answered.

In answer to your question, 90 psi is WAY more than any engine needs! You will be stripping oil pump drive gears with that kind of pressure. 45psig is at the top end of the pressure for anything but the multi-thousand hp, 10,000rpm monsters of the 1/4 mile. 12 psi at idle is also very good. I think you are buying problems you don't really have.
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Old 01-20-2005, 12:50 AM
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Sweet mopar, rsr. Willys is right on with the oil pressure. Check out his journal. Dan
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