72 390 cid
Mountain Pass
Joined: Jul 2000
Posts: 189
Likes: 12
From: Minnesota
72 390 cid
I just purchased a 76 F150 2wd to add to my collection, ( already have a 76 F150 4x4 and a 79 F150 4x4). The truck has a 72 390 in it with a 2bbl carb. It is completely stock. Does anyone know what kind of horsepower this engine would be putting out? I have only been able to find info on 390's with 4bbl's. I am thinking about a few modifications, 4bbl and headers, but I would like to get an idea of where this motor is at for horsepower now. Thanks.
Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
72 390 cid
My book lists “N/A” for all the ’72 truck engine specifications (thank-you very much!) They are listed for the ’71 trucks if that will give you an idea. For the 390 2V in the F100-F250 models, gross horsepower is 255 @ 4400 RPM, net horsepower is 180 @ 4000 RPM. Gross torque is 376 @ 2600 RPM, net torque is 320 @ 2200 RPM. Compression ratio is 8.6 to 1. Not sure exactly when they started retarding the cams on these engines.
Barry
Barry
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
72 390 cid
Dar, Question, how do you know for sure that the engine is what you were told that it is? In 76 a 360 would have been stock issue and there is no way that I know of to look at the two engines and tell the difference. Did the PO tell you that he pulled the engine himself and put it in?
I am of the opinion that you will never see enough difference in adding a 4 barell over a two and forget the headers unless you are planning to race the engine. If you must do the intake and carb. stay with a 600 cfm, no larger. Dual exhaust is a good idea.
John
jowilker@nc.freei.net
66 F100s
In the still cool hours of the night, you can hear chevys rusting away.
I am of the opinion that you will never see enough difference in adding a 4 barell over a two and forget the headers unless you are planning to race the engine. If you must do the intake and carb. stay with a 600 cfm, no larger. Dual exhaust is a good idea.
John
jowilker@nc.freei.net
66 F100s
In the still cool hours of the night, you can hear chevys rusting away.
Mountain Pass
Joined: Jul 2000
Posts: 189
Likes: 12
From: Minnesota
72 390 cid
I know that the motor is a 390 because the original tag is still on the valve cover indicating that it is the 390 cid. The original motor, I'm not sure what it was as I still have to check out the vin # was blown about 6 or 7 years ago and this 390 was put in.
Thread Starter
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Posting Guru
Joined: Oct 1999
Posts: 1,188
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From: yes
72 390 cid
I believe the 72 390's were 8:1 compression, in any case it's significantly lower than any of the car 390's if you have headers and a 4 barrel intake put on you will notice a difference maybe even better gas milage, do a tune up too to help.
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Posting Guru
Joined: Jul 1999
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From: Inthepast
72 390 cid
[FONT COLOR="#0000ff" SIZE="+1" FACE="Veranda"]
I personally have never seen this sort of thing....but I've heard tale told that you can convert a 360 to a 390 by slappin on some neat new 390 valve covers! If you want to know for sure, I'd recommend you use the dowel trick to get a quick and dirty stroke length to confirm the 390 status. I have the details on my webpage.
[/FONT]
http://members.aol.com/tbeeee/page/signature.gif
[FONT COLOR="#ff0000" SIZE="+2" FACE="Bassett"]Stock Man[/FONT]
[FONT COLOR="#0000ff" SIZE="-1" FACE="Tahoma"]
1967 F250 4wd Mini Fire Truck
1967 F-250 FE 390 4wd LWB Styleside
1966 F-250 I6 240 2wd LWB Flareside
http://www.hometown.aol.com/tbeeee
I personally have never seen this sort of thing....but I've heard tale told that you can convert a 360 to a 390 by slappin on some neat new 390 valve covers! If you want to know for sure, I'd recommend you use the dowel trick to get a quick and dirty stroke length to confirm the 390 status. I have the details on my webpage.
[/FONT]
http://members.aol.com/tbeeee/page/signature.gif
[FONT COLOR="#ff0000" SIZE="+2" FACE="Bassett"]Stock Man[/FONT]
[FONT COLOR="#0000ff" SIZE="-1" FACE="Tahoma"]
1967 F250 4wd Mini Fire Truck
1967 F-250 FE 390 4wd LWB Styleside
1966 F-250 I6 240 2wd LWB Flareside
http://www.hometown.aol.com/tbeeee
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Junior User
Joined: Apr 2000
Posts: 89
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72 390 cid
[font size="1" color="#FF0000"]LAST EDITED ON 11-Jul-00 AT 10:34 PM (EST)[/font][p]4Fd's
My '69 has the horsepower rating on the tag on the drivers door. I've got a 4 barrel on it, and I'm not sure that's what came on it but it's rated at 175hp at 4000rpm and that sounds like a two barrel. The cars came as high as 325hp in a 390gt.
Jim
P.s. That's with a compression ratio 7.2:1,which
could explain the low hp rating.
My '69 has the horsepower rating on the tag on the drivers door. I've got a 4 barrel on it, and I'm not sure that's what came on it but it's rated at 175hp at 4000rpm and that sounds like a two barrel. The cars came as high as 325hp in a 390gt.
Jim
P.s. That's with a compression ratio 7.2:1,which
could explain the low hp rating.
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