[DeTomaso] For sale, 351C crank...

[B Hower]

Asa,
 
Ford re-indexed the cam (1973) three degrees retarded, not the crank.
 
Bud #3400

--- On Mon, 5/21/12, Asa Jay Laughton <asajay at asajay.com> wrote:


From: Asa Jay Laughton <asajay at asajay.com>
Subject: Re: [DeTomaso] For sale, 351C crank...
To: detomaso at realbig.com
Date: Monday, May 21, 2012, 10:30 PM


My next build will be a stroker, pretty much for certain on that.  Too 
many good reviews from folks just on this forum, not to mention other 
forums.  Probably -not- with this engine though.

The block was bored .030 over back in 1985.  I've not sonic checked it, 
nor checked for taper or cylinder wear yet but it's a good bet I 
shouldn't use it since it's been bored once.

The engine was a 1973 (from my first Mustang Fastback).  As such, I 
believe the crank is indexed differently for emissions.  I need someone 
to validate that for me and if I can take it out with a properly indexed 
timing gear set.

It was suggested I might have the crank turned offset for a stroker kit 
using Chevy rods.  Can that be done?  Is it a good idea?  Is it less 
expensive to turn this crank than buy one ready made in a kit?

For now, that build is a long way off anyway.  Now that the mystery is 
solved, I'll probably box up the pieces and shelve it for a while.

Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com
http://www.teampanteraracing.com
http://facebook.com/racingagainstautism


On 5/21/2012 6:50 PM, Chance Dorsey wrote:
> Wow Asa Jay,
>
> That is really ugly!!!  On a positive note, 80k on your first engine build!!!  I hope I can achieve the same mileage on my new engine.  Mine isn't my first build; but it is my first non stock build.  Only time will tell.
>
> So what do you think your plan will be, used crank and back to stock or big inch stroker?
>
> Thanks,
>
> Chance Dorsey
> Austin, TX
>
> On May 21, 2012, at 6:04 PM, Asa Jay Laughton<asajay at asajay.com>  wrote:
>
>> ... turned .010 under, now slightly used.
>>
>> http://www.teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&Itemid=57&g2_itemId=4898
>>
>> For those who remember I've had an old 351C on an engine stand in my
>> garage because it was making some rattling noises under slight load...
>> I tore further into it today.  The above link shows you what I found.
>>
>> -Now- I know what a spun bearing sounds like.  Lord knows how long it
>> had been that way, but a second one was on it's way as well.  I couldn't
>> tell you why it started, but I can certainly show you the results.  The
>> number 4 rod journal on the crank is now turned -quite- a bit further
>> than it should be, on the thrust side.  The bearings halves are nearly
>> sharp enough to cut meat.  It's ugly.
>>
>> The crank may be salvageable but it would definitely need a good turning
>> and it would be way undersize.  Personally I think it's probably shot at
>> this point.
>>
>> The rod and cap are also both very worn on the bearing surfaces.  I'm
>> not sure it's salvageable or not.  I imagine it can be, but it would
>> need to be bored oversize.
>>
>> This was the very first engine rebuild I ever did.  It was part of my
>> final project in the Automotive Technology degree program I graduated
>> from in 1985.  The engine was in my Mach I and was driven nearly every
>> day until the late 90's.  It had a change of heads from 2V to 4V, with
>> manifold, and a cam change, somewhere in mid-life.  When I finally put
>> her down due to the rattling sound, I figure she had nearly 80,000 miles
>> on her, maybe more.
>>
>> I rebuilt a different engine and made the swap in 2001.  That's a whole
>> other story that you can probably read in the archives of this list.
>> After nearly 12 years, I now know what failed.
>>
>> Enjoy,
>> Asa Jay
>>
>> Asa Jay Laughton, MSgt, USAFR, Retired
>> &   Shelley Marie
>> Spokane, WA
>> ******************************
>> http://www.racingagainstautism.com
>> http://www.teampanteraracing.com
>> http://facebook.com/racingagainstautism
>>
>>
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