fordtrucks61-79-digest Sunday, February 8 1998 Volume 02 : Number 080

Ford Truck Enthusiasts - 1961-1979 Trucks Digest
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In this issue:

Re: Carb Size? []
Re: Vent windows. []
Re: Vent windows. []
Whistle []
390FE Specifications [Thomas Hogan ]
Re: Compression Ratio [sdelanty ]
FE compression (was Re: 390 or 460?) [sdelanty ]
Re: 390FE Specifications [Doug Neely ]
The 351M Gilligans Adventure Continues []



Date: Sat, 7 Feb 1998 23:59:22 EST
Subject: Re: Carb Size?

I believe I started this mess regarding carb sizes, I installed the manifold
and carb today, put a eldelbrock performer manifold and 600 carb in a 302,
seems to run, tomorrow I'll take it out on the Freeway, its got real quick
response and seems like no dead spot , but tomorrow will tell..

Mike in Seattle
was about 65 Degree and Sunny today !


Date: Sun, 8 Feb 1998 00:13:31 EST
Subject: Re: Vent windows.

Marko, don't have a fax, but telephone # would work, also is there a part # ?

Mike in Seattle


Date: Sun, 8 Feb 1998 00:14:10 EST
Subject: Re: Vent windows.

Marko, will they work on my 72 ?


Date: Sun, 8 Feb 1998 00:15:43 EST
Subject: Whistle

I will look on Monday, if it takes a lock to fix that whistle, I'll do it...

Mike in Seattle


Date: Sat, 07 Feb 1998 20:22:52 -0800
From: Thomas Hogan
Subject: 390FE Specifications

Would someone please post the following info for a 390FE motor?
1) Cylinder Block Deck Height
2) Piston Compression Height
The year I'm interested in is 1976 but I don't think there will be any
difference in these specs from year to year.

Second question, does any FE block have a taller deck height than a 390?

Many thanks in advance.


Date: Sat, 7 Feb 1998 21:55:33 -0800
From: sdelanty
Subject: Re: Compression Ratio

>> with .065" leftover..
>> Letsee... with a stock 4.05" bore that gives a volume of 13.72cc.
>> Add a combustion chamber volume of 71cc, plus another 8cc for the head
>> gasket gives 92.72cc total volume. That makes for 10:1 compression!
>> Cool!
>> Happy motoring,
>> Steve

>My software strikes again. It also has a compression calculator. If I
>put in a bore of 4.050, a stroke of 3.984, flat top pistons, a deck
>height of .010 (as big as it will go), and a "standard" head gasket
>thickness of .033 here is what I get:
>Head gasket volume of 6.97cc
>CC volume of 92.70
>and a final compression of 9.12.
>Not quite 10.00 to 1, but still MUCH better than 8.00:1.

What's up with that? 4.050" x 3.984" = 10.287cm x 10.119cm = 841cc
cylinder volume. 841 + 92.7 / 92.7 = 10.072:1 compression ratio.

How come my math don't equal Yer math?


"The greatest dangers to liberty lurk in insidious encroachment
by men of zeal, well-meaning but without understanding."
-- Justice Louis D. Brandeis


Date: Sat, 7 Feb 1998 21:55:35 -0800
From: sdelanty
Subject: FE compression (was Re: 390 or 460?)

>> Yes, this is correct. Ford uses piston height to set compression ratio,
>> since almost all of the "garden variety" FE 360-390 heads have the same
>> combustion chamber volume. (68-72cc)

>What can I say, you learn something new every day. This has been an
>ongoing concern on the Galaxie list.
>The only problem I forsee, is this a flat top? If so it probably
>wouldn't have needed valve reliefs with that much deck clearance. Better
>be real careful checking valve to piston clearance.

Yes, the pistons are flattops.
On my '73 truck 390 I run a .490"/465" 218/228.050" cam, and when I
assembled it I checked the valve/piston clearance with clay.
It was about 1/4" !!


"The greatest dangers to liberty lurk in insidious encroachment
by men of zeal, well-meaning but without understanding."
-- Justice Louis D. Brandeis


Date: Sat, 07 Feb 1998 23:14:41 -0800
From: Doug Neely
Subject: Re: 390FE Specifications

>From the SVO catalog Crankshaft cenerline to deck 10.170
for all FE's Compression distance piston pin to top of
piston 390 1.775, 406 1.745, 410 1.674, 427 1.752, 428 1.674
hope this helps.


Date: Sun, 8 Feb 1998 02:38:20 EST
Subject: The 351M Gilligans Adventure Continues

Gary and Dan-
I looked at the heads long and hard, cause I cleaned them like crazy, tore all
the valves out and wire wheeled them. The compression check before tear-down
showed numbers 1/2 to be at ~125, with the rest at 150.
Motor never puffed white smoke at all. Didn't use any coolant either.
WEIRD. The water is (WAS) showing up in my crank case breather. I did have a
little bubbling in my radiator water. No exhaust smell.
Is some bubbling normal, or is all bubbling mean you done got a blown
something or a cracked something?
Anyway, I had someone tell me that you can get a good amount of condensation
from the PCV system going berserk. I hope that's where the water was coming
from. I did what is probably sacrilege to many members of this list, which was
to buy a can of STOPLEAK (There, I said it! Forgive me!!!)
Either one of two things; either the moisture on my valve cover undersides and
filler cap was coming from this crazed PCV system coupled with the moist CA
weather, OR the stop leak plugged up whatever hole I had where ever I had it.
The dude is running cool, and is slated for a trip to the lake tomorrow.
There is a third possibility. Jesus did turn water into wine, and I did pray.
That's actually is my favorite possibility.
Thanks guys, and enjoy the rest of your weekend-

= Greg,
= Did you look at the heads at all when you had them off? The M
=series was prone to cracking near the valve chamber. I`ve seen this happen
=on them when you take the heads off to do a valve job. Seems that they
=ake a set when they clamp them at the factory and run the hot and cold
=cycle over the years. When you unbolt them they may or may not crack. Also
=did you notice if the motor was puffing white smoke while it was running?
=this would indcate that water was getting in from a crack or a blown
=gasket. Look at the rad cap while it is running to see if the fluid is
=bubbling in side. This will indcate a crack or blown gasket also.
= Garry
- - --- On Fri, 6 Feb 1998 23:06:50 EST wrote:

=Did you try a compression test? Relieve all the pressure on the
=cooling system and look for low cylinders. If your engine has ever
=overheated in the past you may have a warped or cracked head.
=Dan Lee
'=53 F100



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