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perf-list Digest Tue, 14 Mar 2000 Volume: 2000 Issue: 026

In This Issue:
Re: 400m artical - David Resch
Re: 400m artical - David Resch
C6 EB
71 distributor in a 85
Re: 71 distributor in a 85
(no subject)
Re: [Re: Engine Temps]

----------------------------------------------------------------------

From: "Bill Beyer" pacifier.com>
Subject: Re: 400m artical - David Resch
Date: Tue, 14 Mar 2000 08:55:10 -0800

Tony,

I bored the 1976 M block I have .020 over with no problem. The casting
procedure is the same for the M series as Clevelands, IOW thinwall. Casting
#s for the blocks are found under the right rear cylinder bank. The only
known issue with the M series are blocks cast at the Michigan Casting Center
prior to 1977 which crack in the intake valley water jackets. Look for the M
C C cast into the block near the oil pressure sending port. The magic date
is 7C01.

Cylinder heads on the M series are virtually identical to Cleveland 2V
series. Many people prefer the Cleveland heads because of a thicker casting.
They also have a slightly smaller combustion chamber volume, 76.2cc vs
78.4cc. I have 1974 Cleveland 2Vs on the 400 I'm building. Port design is
the same.

All this information applies to the American M series and Clevelands. I
understand that you guys have a different design Cleveland head than we do.

----- Original Message -----
From: Tony Travers picknowl.com.au>
To: ford-trucks.com>
Sent: Tuesday, March 14, 2000 7:03 AM
Subject: [perf-list] 400m artical - David Resch


>
>
> Read an article written by David Resch on 400 motor. A couple of
questions,-
>
> 1. I have lots of experience with problems with Cleveland blocks
punching through the cylinder wall when trying to bore .020 over standard.
Also have had a couple crack between head bolt holes and water jackets. I've
put this down to the age (last offered in Australia in 1980) with up to 30
years of rusty crud floating around originally thin cast cylinder walls.
> The 400 being a different casting (Tall Block) is it any better?.
>
> 2. 400's a rare here in Australia, How do I identify the age -
year of manufacture.
>
> 3. Are the cylinder heads the same in combustion chamber and port
designs as 351c 2v. If the chamber is the same what size would they be
72cc??
>

> Any reliable help would be appreciated
>




------------------------------

From: "Dave Resch" sybase.com>
Date: Tue, 14 Mar 2000 10:28:31 -0700
Subject: Re: 400m artical - David Resch


>From: "Tony Travers" picknowl.com.au>
>Subject: 400m artical - David Resch
>
>1. I have lots of experience with problems with Cleveland
>blocks punching through the cylinder wall when trying to
>bore .020 over standard. Also have had a couple crack
>between head bolt holes and water jackets.
>
>The 400 being a different casting (Tall Block) is it any
>better?.

Yo Tony:

I too have heard about problems w/ overboring 335 series (351C/351M/400) engine
> blocks, but not until more than 0.030" overbore. I have also heard about
problems w/ blocks/heads cracking, but again, I have never seen that personally.
Others may have different experiences, but that's what I've seen.

I wonder if the alloys and casting techniques used in Australian 351C
blocks/heads are different than those used for US engines. This could be part
> of the problem. I have also heard rumors that the Aussie blocks/heads are
better castings, but I don't really know. I have heard that a lot of people in
Australia run their vehicles w/out anti-freeze/coolant, and that would certainly
cause corrosion and erosion inside the water jacket over several years usage.

At any rate, if the 400s were not cast in Australia, they would probably be
different, maybe or maybe not better.

>2. 400's a rare here in Australia, How do I identify the
>age - year of manufacture.

Date codes are located in two places on the block. The casting date on Michigan
Casting Center (MCC) blocks is located in the little recess at the back of the
block on top, in the area of the oil pressure sending unit. Some Cleveland
Foundry (CF) blocks do not have the casting info there, though. All M-blocks
have the original build date (the date the engine was assembled at the factory,
usually about 10-15 days after the casting date) stamped into the front cover
mating surface on the front of the block.

Ford engine date codes are in the format nXnn, where the first number n is the
last digit of the year (7=1977), the letter X is the month (A-L, A=January), and
the last number nn is the day of the month (01-31).

>3. Are the cylinder heads the same in combustion chamber
>and port designs as 351c 2v. If the chamber is the same
>what size would they be 72cc??

I have no first-hand knowledge about Aussie Cleveland heads. I'm told the
general design of the ports and chambers is the same, but some Aussie Cleveland
heads used slightly different chamber designs/sizes than US heads. I've read
that since some 302 engines in Australia actually used the Cleveland head, there
is an Aussie Cleveland head w/ 52cc chambers. This is way smaller than anything
made in the US, and on a 351 or 400 it would produce outrageously high
compression.....

---

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