[Healeys] Crankshaft

gradea1 at charter.net gradea1 at charter.net
Sun Oct 31 11:21:13 MDT 2021 

ONE OTHER IMPORTANT FACTOR IN SMOOTH RUNNING, RELIABLE ENGINES IS
BALANCE (some call it blueprinting but that encompasses many changes)
When the machine shop did my original crank, they first magnafluxed
it, and then turned it to .020. I provided the flywheel, and front
pulley, as well as the clutch cover and disc and they used those
components to "balance" the engine. The markings on the flywheel and
clutch were used in assembly to put all correctly in balanced position
and the engine runs very smoothly, for a four, and sounds great. I
would recommend this procedure when rebuilding.
Think about all the weight being thrown around at the rear of the
engine, and just a small pulley up front. Adding more mass to the
front can't be a bad thing, but if you do as Donald instructed, and
don't rev over 4500RPMS when racing, the engine will last a long time.
The 100 flywheel is one serious hunk of metal.
On the first 6-cyl. engines, Geoff Healey said if they revved it over
4000 they were afraid the vibration would blow apart. The went back to
Morris Motors and the solution then was to thicken the back plate. I
don't know much about the engineering of rotation but the word
"smooth" seems to fit the best. Hank

	-----------------------------------------From: "WILLIAM B LAWRENCE" 
To: "josef-eckert--- via Healeys", "Bob Spidell",
"gradea1 at charter.net", "josef-eckert at t-online.de"
Cc: 
Sent: Saturday October 30 2021 10:17:08PM
Subject: Re: [Healeys] Crankshaft

  DW sells a vibration damper for the 4 cylinder.   
  When I built my engine I used the belt pulley system from a six
because one of the vibration sources on the four is the heavy, old
school, implement belt that is standard. I found all three pulleys fit
with only a minor mod to the water pump pulley. It may be the placebo
effect but I really think the engine runs more smoothly with the
narrower belt. I considered using the vibration damper from the six
also, but it’s a little chancy to install one without analyzing the
vibration characteristics of the crank and matching the damper to it.
The DW damper is tailored to the four cylinder crank.  
  Bill Lawrence  BN1 #554 
-------------------------
FROM: Healeys  on behalf of josef-eckert--- via Healeys 
SENT: Saturday, October 30, 2021 6:44 PM
TO: Bob Spidell ; gradea1 at charter.net 
CC: healeys at autox.team.net 
SUBJECT: Re: [Healeys] Crankshaft     

	 Is there a need for one? Never needed one on my 100.

	-----Original-Nachricht----- 

	Betreff: Re: [Healeys] Crankshaft 

	Datum: 2021-10-30T20:34:14+0200 

	Von: "Bob Spidell via Healeys"  

	An: "gradea1 at charter.net"  

	     Begs the question: Anyone make an aftermarket balancer for the
100s? Without looking, I think there’s enough room for one. 
On Oct 30, 2021, at 10:17 AM, Henry G Leach via Healeys  wrote:

   The "weakness" in the original 100, A-90 crankshaft was the lack of
a harmonic balancer, coupled with a huge heavy flywheel. More than
likely, the crank that was sought after for replacement, had cracks
near the rear main area where it vibrated itself to death. A case for
not revving the engine over 4000 rpms. (Donald Healey set strict
orders for all his racers to keep the revs down).   They (BMC) fixed
all that, or should I say Morris Motors, fixed it by adding the
harmonic balancer to the early 100-6 engine. Too bad they lost points
in other areas, but by the time the 2912cc engine was developed, they
did in fact fix all that...best six made! Hank

	----------------------------------------- From: "David Porter via
Healeys" 
 To: "Michael MacLean", "healeys at autox.team.net"
 Cc:
 Sent: Saturday October 30 2021 4:20:15AM
 Subject: Re: [Healeys] Crankshaft

	Don't over think this. Just because it will rev much better doesn't
mean it gets used all the time, but it's there. Of course the addition
of other lighter bits and an AL head and expensive harmonic balancer
will have you at a greater expense. Speed costs money, how fast do you
want to go?. The AH four makes excellent bottom end torque. The huge
main caps handle it just fine. The original crank is the weak link. DP


 On October 30, 2021, at 3:22 AM, Michael MacLean via Healeys  wrote:

  Wouldn't you have to beef up the main caps and add straps across
them to handle the crank in higher RPM? Just a thought with only 3
main bearings and no harmonic balancer. Mike MacLean  
 On Fri, Oct 29, 2021 at 8:48 PM WILLIAM B LAWRENCE via Healeys 
wrote:   I’d say it doesn’t transform the engine by itself, but it
provides a stronger basis for the other mods that will.   Bill
Lawrence BN1 #554 
-------------------------
 FROM: Healeys  on behalf of Bob Spidell via Healeys 
SENT: Saturday, October 30, 2021 1:16 AM
TO: richard mayor 
CC: healeys at autox.team.net 
SUBJECT: Re: [Healeys] Crankshaft       Does it de-stroke the engine
(shorter throws)?   
On Oct 29, 2021, at 5:05 PM, richard mayor via Healeys  wrote:

    But a lightened flywheel will get you there quicker. 
 On Fri, Oct 29, 2021 at 3:19 PM Michael Salter via Healeys  wrote: 
David, how does changing the crankshaft give you 2000 additional RPM?
Lighter rods and pistons, balancing, cam timing, bigger valves,
porting, bigger carbs, shorter stroke, even increased compression may
all contribute to higher RPM but a crank alone will not make any
difference, neither will a lightened flywheel.  M  
 On Fri., Oct. 29, 2021, 6:03 p.m. David P via Healeys,  wrote:   

	lighter, stronger, 2000+ additional rpms ,add a wee bit of cam and
its a stormer and looks dead stock.. add a real seal and go have some
fun. As I said IMHO.. It ain't cheap. dp I understand one is going on
BAT in the near future. Black over red.. On 10/29/2021 3:25 PM,
Michael Salter via Healeys wrote:  Confirmation bias is a very
powerful force.   M  
 On Fri., Oct. 29, 2021, 3:35 p.m. Bob Spidell via Healeys,  wrote: 
OK, I'll bite: How does a Welch crank transform a a 100? I get that
 they're steel and stronger, and should withstand more RPM/HP, but
does
 the crank alone do it?

 Bob

 On 10/29/2021 8:10 AM, David P via Healeys wrote:
 >
 > pretty much hen's teeth is my guess. But a Welsh crank, it
transforms
 > the engine. IMHO I'm sure Donald wishes they were available in '54
 >
 > On 10/28/2021 2:29 PM, Robert Memler via Healeys wrote:
 >> I need a crankshaft for a 54 b;no. Does anyone have a spare that
they
 >> would be willing to sell?
 >>
 >> Thanks, Bob Memler
 >>

 _______________________________________________
 Support Team.Net [1]  [2]http://www.team.net/donate.html [3]
 Suggested annual donation $12.75

 Archive:  [4]http://www.team.net/pipermail/healeys [5] 
[6]http://autox.team.net/archive [7]

Healeys at autox.team.net
 [8]http://autox.team.net/mailman/listinfo/healeys [9]

 Unsubscribe/Manage:  
[10]http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
[11]

 _______________________________________________
 Support Team.Net [12] "http://www.team.net/donate.html" [13]
rel="noreferrer" target=
 "_blank"> "_blank">http://www.team.net/donate.html [14]
 Suggested annual donation $12.75

 Archive: "noreferrer" target="_blank">
"http://www.team.net/pipermail/healeys" [15] target=
 "_blank">http://www.team.net/pipermail/healeys [16]
"http://autox.team.net/archive" [17] rel="noreferrer" target=
 "_blank"> "_blank">http://autox.team.net/archive [18]

 "_blank">Healeys at autox.team.net
 "noreferrer" target="_blank">
"http://autox.team.net/mailman/listinfo/healeys" [19] target=
 "_blank">http://autox.team.net/mailman/listinfo/healeys [20]

 Unsubscribe/Manage:
"http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com"
[21]
 rel="noreferrer" target="_blank">
"http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com"
[22]
 target=
 "_blank">http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com
[23]

 --
 Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378
My World go here: rel="noreferrer" target=
 "_blank">WWW.PORTERBIKES.COM/
_______________________________________________
 Support Team.Net [24]  [25]http://www.team.net/donate.html [26]
 Suggested annual donation $12.75

 Archive:  [27]http://www.team.net/pipermail/healeys [28] 
[29]http://autox.team.net/archive [30]

Healeys at autox.team.net
 [31]http://autox.team.net/mailman/listinfo/healeys [32]

 Unsubscribe/Manage:  
[33]http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
[34]

  _______________________________________________
 Support Team.Net [35]  [36]http://www.team.net/donate.html [37]
 Suggested annual donation $12.75

 Archive:  [38]http://www.team.net/pipermail/healeys [39] 
[40]http://autox.team.net/archive [41]

Healeys at autox.team.net
 [42]http://autox.team.net/mailman/listinfo/healeys [43]

 Unsubscribe/Manage:  
[44]http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com
[45]

  _______________________________________________
 Support Team.Net [46]  [47]http://www.team.net/donate.html [48]
 Suggested annual donation $12.75

 Archive:  [49]http://www.team.net/pipermail/healeys [50] 
[51]http://autox.team.net/archive [52]

Healeys at autox.team.net
 [53]http://autox.team.net/mailman/listinfo/healeys [54]

 Unsubscribe/Manage:  
[55]http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
[56]

    _______________________________________________
 Support Team.Net [57]  [58]http://www.team.net/donate.html [59]
 Suggested annual donation $12.75

 Archive:  [60]http://www.team.net/pipermail/healeys [61] 
[62]http://autox.team.net/archive [63]

Healeys at autox.team.net
 [64]http://autox.team.net/mailman/listinfo/healeys [65]

 Unsubscribe/Manage:  
[66]http://autox.team.net/mailman/options/healeys/springer.mike51@gmail.com
[67]

   _______________________________________________
 Support Team.Net http://www.team.net/donate.html [68]
 Suggested annual donation $12.75

 Archive: http://www.team.net/pipermail/healeys [69]
http://autox.team.net/archive [70]

 Healeys at autox.team.net
http://autox.team.net/mailman/listinfo/healeys [71]

 Unsubscribe/Manage:
http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
[72]

    

Links:
------
[1] http://Team.Net
[2] http://www.team.net/donate.html
[3] http://www.team.net/donate.html
[4] http://www.team.net/pipermail/healeys
[5] http://www.team.net/pipermail/healeys
[6] http://autox.team.net/archive
[7] http://autox.team.net/archive
[8] http://autox.team.net/mailman/listinfo/healeys
[9] http://autox.team.net/mailman/listinfo/healeys
[10]
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
[11]
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
[12] http://Team.Net
[13] http://www.team.net/donate.html
[14] http://www.team.net/donate.html
[15] http://www.team.net/pipermail/healeys
[16] http://www.team.net/pipermail/healeys
[17] http://autox.team.net/archive
[18] http://autox.team.net/archive
[19] http://autox.team.net/mailman/listinfo/healeys
[20] http://autox.team.net/mailman/listinfo/healeys
[21]
http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com
[22]
http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com
[23]
http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com
[24] http://Team.Net
[25] http://www.team.net/donate.html
[26] http://www.team.net/donate.html
[27] http://www.team.net/pipermail/healeys
[28] http://www.team.net/pipermail/healeys
[29] http://autox.team.net/archive
[30] http://autox.team.net/archive
[31] http://autox.team.net/mailman/listinfo/healeys
[32] http://autox.team.net/mailman/listinfo/healeys
[33]
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
[34]
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
[35] http://Team.Net
[36] http://www.team.net/donate.html
[37] http://www.team.net/donate.html
[38] http://www.team.net/pipermail/healeys
[39] http://www.team.net/pipermail/healeys
[40] http://autox.team.net/archive
[41] http://autox.team.net/archive
[42] http://autox.team.net/mailman/listinfo/healeys
[43] http://autox.team.net/mailman/listinfo/healeys
[44]
http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com
[45]
http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com
[46] http://Team.Net
[47] http://www.team.net/donate.html
[48] http://www.team.net/donate.html
[49] http://www.team.net/pipermail/healeys
[50] http://www.team.net/pipermail/healeys
[51] http://autox.team.net/archive
[52] http://autox.team.net/archive
[53] http://autox.team.net/mailman/listinfo/healeys
[54] http://autox.team.net/mailman/listinfo/healeys
[55]
http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
[56]
http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
[57] http://Team.Net
[58] http://www.team.net/donate.html
[59] http://www.team.net/donate.html
[60] http://www.team.net/pipermail/healeys
[61] http://www.team.net/pipermail/healeys
[62] http://autox.team.net/archive
[63] http://autox.team.net/archive
[64] http://autox.team.net/mailman/listinfo/healeys
[65] http://autox.team.net/mailman/listinfo/healeys
[66]
http://autox.team.net/mailman/options/healeys/springer.mike51@gmail.com
[67]
http://autox.team.net/mailman/options/healeys/springer.mike51@gmail.com
[68] http://www.team.net/donate.html
[69] http://www.team.net/pipermail/healeys
[70] http://autox.team.net/archive
[71] http://autox.team.net/mailman/listinfo/healeys
[72]
http://autox.team.net/mailman/options/healeys/bspidell@comcast.net

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20211031/9744ed9b/attachment.htm>

More information about the Healeys mailing list