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| Interceptor 361 & 390 HP question |
| Author |
Message |
    
Mark Maral
New member
Username: keatonboat1
Post Number: 1
Registered: 07-2007
| | Posted on Friday, July 06, 2007 - 08:46 am: | 
|
Looking to confirm if I have this information correct. I believe the Interceptor 361 was 260hp and the 390 was 300hp. Is this true? I have an old Interceptor brochure from Dearborn Marine Engines printed in 1959, but it only lists information/specs for the 256 through 361 cu in engines.
Thanks, Mark |
dogsharks38
Member
Username: dogsharks38
Post Number: 62
Registered: 12-2005
| | Posted on Friday, July 06, 2007 - 02:46 pm: |
|
Hi Mark,
To be honest with you, I didn't know the 361 was even used in marine use until now. It is commonly thought of as a truck block, with different crankshaft nose and pulley requirements up front, but I think most all the other FE engine parts will bolt on. Not sure about the intakes.
The truck blocks would make a great marine motor, reinforced, and most had a forged steel crankshaft too. Even the 427 didn't come with a steel crank, the cast iron one was thought to be very good and I guess they didn't need it. The 390 shares the same crank with the 427.
My Interceptor manual shows three motors, the 352 at 250-hp, the 390 at 285, and the 427 at 300.
Since my manual shows the 427, it was apparently a 1965 or 66 manual. I know Chris Craft, for instance, didn't use the 427 until 1966. Of course, Ford didn't build a 427 until half way through 1963, so that helps narrow it down a bit.
The 390 is well capable of 300-hp, and I understand Interceptor (Eaton Dearborn Marine) provided Higging with a 400-hp version of the 390. Not sure just how accurate this is, but MISS HIGGY, a Higgins a buddy of mine has, with a 390, came from Higgins (so he says) with the 400-hp option.
With the added cubes, it is realistic to think the 361 would produce 260-hp. The heads are the same as all the other FE motors, to my recollection, which means they can be cleaned up a bit and perform very well, indeed, if some free additional horsepower is desired at rebuild time.
Just for a point of information, here are a couple scans from my chris craft site, for your reading enjoyment and 3-ring binder! 
http://www.network54.com/Forum/424840/message/1123099503
Regards, P
http://www.chriscraftcommander.com |
Mark Maral
New member
Username: keatonboat1
Post Number: 2
Registered: 07-2007
| | Posted on Friday, July 06, 2007 - 03:11 pm: |
|
Thanks - doesn't look like my last message posted.
Anyways, I appreciate the info. The engines in question are in a 1965 and 1966 Keaton. The 1966 is supposed to have a 390/300hp and from the picture of the 1965 there is a 260hp decal on the valve cover which led me to believe it was the 361cu.
Anyways, if you like I can scan the 1959 Interceptor brochure I have and send it to you - just let me know.
Thanks, Mark |
Robert E. Hunter
Member
Username: shamrock20
Post Number: 12
Registered: 12-2007
| | Posted on Sunday, January 06, 2008 - 08:01 am: |
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Once I modified a 352 cu in Ford to 361 by using an 361 Edsel piston. It is .050 oversized. Perhaps this is the engine a 361 Interceptor is based on. The only difference in the 352 and the 361 was the piston diameter. |
dogsharks38
Member
Username: dogsharks38
Post Number: 74
Registered: 12-2005
| | Posted on Sunday, January 06, 2008 - 09:51 am: |
|
HiBob,
Interesting info on your 361 cubic inch mod. I have no doubt that the 352 block had enough iron in those cylinder walls to take a larger bore piston, but the FT series (Ford Truck) of the FE engine family used some internal reinforcement in the blocks, a forged steel crankshaft (in many cases) and that crank snout has an entirely different front end dimension for accessory belt pulleys, etc. Therefore, if the motor under question is, indeed, a 361, then I believe it's a truck block which is probably a lot stronger motor than the automotive version of the 352.
For a moment I thought the gent was talking about the 360-hp 352 (solid lifter motor). In any case, a FE or a FT would make a great boat motor, and either one would be able to run like a scalded cat with the right cam, pistons, and fuel delivery system.
Regards, P |
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