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05-24-2021, 07:14 PM | #21 | |
Senior Member
Join Date: Sep 2011
Location: Christchurch New Zealand
Posts: 1,611
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Re: Low power, low vacum
Quote:
So at your altitide the 50 jets should do the job. asking questions is the learning process but remembering then thats the hard part. All the best. Phil NZ |
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05-24-2021, 11:23 PM | #22 |
Senior Member
Join Date: Nov 2010
Location: NM
Posts: 2,438
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Re: Low power, low vacum
I'm down range and at 5330', and with an engine (8BA) in great shape I have never got much above 90 psi. Doesn't sound like compression was your problem anyway, but here is a good reference for altitude for flat V8's.
PS I have found that original jets on 94's frequently don't have markings.
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'52 F-1, EAB flathead |
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05-25-2021, 06:45 AM | #23 |
Senior Member
Join Date: Mar 2014
Location: Jacksonville FL
Posts: 3,963
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Re: Low power, low vacum
I, for one, am grateful that you posted this AS I have learned a lot, especially the altitude and subsequent effects. Thanks for the learning/lessons!!!
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05-25-2021, 04:28 PM | #24 |
Member
Join Date: Feb 2021
Location: pueblo colorado
Posts: 40
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Re: Low power, low vacum
Success!!!
Put her back together and advanced the timing from stock, 4 degrees. And yes, I went the right direction this time. Put in the #50 jets and started her up. Now I am getting 12-13 inches of vacum. Took it out for a drive and wow, it's like a completely different motor. Twice the power it had before!!! Will pull #5 plug again tomorrow and recheck compression. Was 50, and after oil went to 70. Now, with some Marvel Mystery oil in the hole and the tank, and me running the boogers out of it for a 1/2 hr, hopefully that cylinder will stay at 70. Thanks again to all you guys for the advice. I feel a whole bunch better about buying this car now. |
05-25-2021, 07:14 PM | #25 |
Senior Member
Join Date: Jul 2010
Location: Conifer, Colorado
Posts: 2,429
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Re: Low power, low vacum
Good to hear you are making progress.
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05-26-2021, 10:33 PM | #26 |
Senior Member
Join Date: May 2010
Location: MN
Posts: 7,053
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Re: Low power, low vacum
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A fan of MMO, I don't use it all the time, but in spring I do when waking up my 38 for the summer. One of the reason for leaded fuel was upper cylinder lubrication. MMO helps with that in my opinion. No you don't need lead additive. |
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