Re: [Amc-list] 390 vs. 401 crank casting numbers ....

["Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>]

Thanks Greg and Mark,

Yeah, now that I think about it, that makes sense, there would need to be
something done differently to balance the two (304 vs. 360) but isn't that
done on the flywheel, vibration dampener?
I have two 360s and two 304s, I never checked to see if there is more metal
removed from the counterweights on the 304 crank versus a 360 crank. I
remember taking a 70 360 crank from an Ambassador to the machine shop to
have the long time searched for 304 flywheel match balanced to the 304 flex
plate from the white 70 Javelin. I took a 304 piston and rod assembly with
rings from a 79 304 and the 70 360 crank. I also gave the machinist the 304
dampener off the 304 in the white 70 Javelin. When it all came back home,
the 70 360 crank had a little more material removed from one counterweight.
Does that seem unusual? Whatever the machinist did, he did correctly. The
engine doesn't vibrate at idle, nor at higher rpm either.

Armand


----- Original Message ----- 
From: <Wrambler242@xxxxxxxxxxx>
To: "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx>
Sent: Tuesday, November 11, 2008 8:57 AM
Subject: Re: [Amc-list] 390 vs. 401 crank casting numbers ....


> You're correct in everything except the stroke on the 390-401 crank being
the same.
> If it was Greg would not be gaining 10cu.in. by using a 401crank over the
390 crank.
>
> Not, 100% sure the 304 and 360 cranks are 100% the same, IIRC they are
balanced different from the factory for the larger 360 pistons?
>
>
>
> --
> Mark Price
> Morgantown, WV
> 1969 AMC Rambler, 4.0L, EFI, T-5
> 2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
> " I realize that death is inevitable.
> I just don't want to be around when it happens! "
>
>  -------------- Original message ----------------------
> From: "Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>
> > Greg,
> >
> > I thought I read somewhere about clearance problems putting a 401 crank
in a
> > 304. Could you please confirm that the 401 crank and rods actually fit
into
> > the 304 block without interference problems?
> >
> > Gang,
> >
> > IIRC cast cranks have a very fine parting line,
> > & forged cranks have a larger wider parting line
> >
> > 304 and 360 used cast cranks, same stroke.
> >
> > 390 and 401 are forged, same stroke.
> >
> > Is this correct??
> >
> > Can any 304 crank be used for the crank in a 360?
> >
> >
> >
> > thanks,
> > Armand
> >
> >
> >
> >
> > ----- Original Message ----- 
> > From: "Greg Taylor" <amundaza@xxxxxxxxx>
> > To: "AMC-LIST" <mail@xxxxxxxxxxxx>
> > Sent: Monday, November 10, 2008 12:13 PM
> > Subject: [Amc-list] 390 vs. 401 crank casting numbers ....
> >
> >
> > Hey guys,
> > Got news that the crank for my 304 stroker may indeed be a 401 crank,
> > instead of the 390 crank ... which changes things a bit ... by +10 CID
and
> > perhaps a few $$$$ for the stroker build.
> >
> > Does anyone on the list have casting numbers for the 390 and 401 cranks?
> >
> > I bought this crank from Kenedy back around 1993 or 1994 for $390, new
in
> > the box with AMC bearings. It is the earlier "BW" crank, which I had the
> > adapter machined into the rear flange, for the 727 tranny. Also had it
cross
> > drilled.
> >
> > Thanks for the information, guys!
> >
> >
> >
> > Sincerely,
> > Greg Taylor :) <><
> > Rochester Hills, MI
> > 1989 Jeep Grand Wagoneer "TRMN8R2"
> >
> > And the testimony is this, that God has given us eternal life, and this
life
> > is in His Son. He who has the Son has the life; he who does not have the
Son
> > of God does not have the life. - 1 John 5:11-12
> >
> >
> >
> >
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> >
http://splatter.wps.com/pipermail/amc-list/attachments/20081110/8c9134e8/attachm
> > ent.htm
> > _______________________________________________
> > Amc-list mailing list
> > Amc-list@xxxxxxxxxxxx
> > http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list
> >
> >
> >
> > -- 
> > No virus found in this incoming message.
> > Checked by AVG.
> > Version: 7.5.549 / Virus Database: 270.9.0/1778 - Release Date: 11/9/08
2:14
> > PM
> >
> >
> > _______________________________________________
> > Amc-list mailing list
> > Amc-list@xxxxxxxxxxxx
> > http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list
>
> _______________________________________________
> Amc-list mailing list
> Amc-list@xxxxxxxxxxxx
> http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.549 / Virus Database: 270.9.0/1778 - Release Date: 11/9/08
2:14 PM
>
>

_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list