390 FE Rebuild
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390 FE Rebuild
Hey all. I am looking to rebuild a 390 from a core that I have. I intend to have the heads rebuilt locally. I have a choice of three 4V cast iron intake manifolds that I have picked up here and there. One is from a truck and I have not checked the numbers on the other two yet. I intend to drive it daily so not looking to really boost the HP. But want it to have some punch. Any suggestions that can be provided for my rebuild would be extremely valuable. I can take it apart and put it together but when it comes to performance, I am in the dark. Thanks!
Post Fiend
Joined: Sep 2006
Posts: 14,325
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From: Island Southeast Alaska
Any cast FE intake is like HEAVY. And hard to install without kicking out the gaskets even with a hoist. That's why I have always went aluminum. And prolly why so many cast ones are out there.
Remember to use some RTV on the front and back of the intake as they are hard to get to seal.
Another trick I use is to tie like the pan and timing cover and other gaskets on with thread to hold them in place. Thread don't bother nuthin and I hate to see RTV sticking out all over.
Remember to use some RTV on the front and back of the intake as they are hard to get to seal.
Another trick I use is to tie like the pan and timing cover and other gaskets on with thread to hold them in place. Thread don't bother nuthin and I hate to see RTV sticking out all over.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
Hey all. I am looking to rebuild a 390 from a core that I have. I intend to have the heads rebuilt locally. I have a choice of three 4V cast iron intake manifolds that I have picked up here and there. One is from a truck and I have not checked the numbers on the other two yet. I intend to drive it daily so not looking to really boost the HP. But want it to have some punch. Any suggestions that can be provided for my rebuild would be extremely valuable. I can take it apart and put it together but when it comes to performance, I am in the dark. Thanks!
Go to this post in the Dentside Tech Thread Sticky and scroll down for hyperlinks to several performance FE builds: https://www.ford-trucks.com/forums/1...l#post13139591
.. and then visit Survival Motorsports with your credit card in hand!
Hotshot
Joined: Mar 2013
Posts: 14,255
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From: Phoenix, Az.
Make sure the machine shop installs Hardened valve seats and valve guids in the heads. For our current gas. If not planing to haul anything heavy,I would pick the cam brand of your choice in the 270 range. 265 to 268 range if you pull horses.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Ray, Use the one with S or T on the top if you have one, not going against the alum. recommendation just answering the question. Run a 500 cfm carb on top, nothing larger than a 600. Headers for breathing are a must, and a RV cam.
John
John
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From: **** hole San Jose ca.
..orich
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Thanks for all the advice guys! When I start doing the build I will make sure I start a thread to document the process. I have already seen some other good advice on other threads that I will be incorporating into my build.
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