new 400
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new 400
This is my first post and my first 400 motor. I just got an 79 f250 with a 400. it is bone stock with a 2 barrel carb. and has all the smog stuff on it. what are some simple mods to do? And can I scrap all the smog stuff. I don't need emissions here. i was thinking about new intake 4 barrel, headers dual exaust, and new air cleaner to get some more air in there.
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Joined: Jan 2005
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From: The Vieux Ford, Kansas
I have a 79 with a 400 too and i got rid of all the smog stuff (mine only had EGR) put on a 4 barrel carb and dual exhaust, hope to get the headers soon and wow just the carb and intake made it a diffrent truck but the perivious owner got to mine had a 272 degree cam and the carb was off an 84 302 so it was pretty sickly to start with. I have to run the distributor with out the vacume advance now that the EGR is gone but other than getting the timing right it should be a pretty strait forward project, I would go for low end tourqe these motors make power down low and don't really like RPMs in stock form.
-Johnboy
-Johnboy
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Joined: Apr 2001
Posts: 2,364
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From: Eustis FL
Nothing wrong with keeping the EGR system if it works. It will help you run higher ignition timing, thus a little more power. Intake, carb, exhaust headers; YES.
I would also run a closed element air cleaner with ducted outside air, but that's just my opinion. Run a cam with more exhaust duration for these heads. A future upgrade might be some Aussie 302C quench heads.
See this gentleman for the goods on the 400: http://www.tmeyerinc.com/fordmotors.htm
I would also run a closed element air cleaner with ducted outside air, but that's just my opinion. Run a cam with more exhaust duration for these heads. A future upgrade might be some Aussie 302C quench heads.
See this gentleman for the goods on the 400: http://www.tmeyerinc.com/fordmotors.htm
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Originally Posted by ol74hb
This is my first post and my first 400 motor. I just got an 79 f250 with a 400. it is bone stock with a 2 barrel carb. and has all the smog stuff on it. what are some simple mods to do? And can I scrap all the smog stuff. I don't need emissions here. i was thinking about new intake 4 barrel, headers dual exaust, and new air cleaner to get some more air in there.
http://www.performancedistributors.com/forddistributor.htm
Also, there is now an excellent installation article on the D.U.I. Distributor on the Ford-Trucks.com site at:
https://www.ford-trucks.com/article/idx/0/358/article/DUI_Ignition_Installation_In_A_Ford_351W_V8.html
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