Eagle crank video
Thread Starter
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
Eagle crank video
We balance for a lot of other shops in the area and from time to time we do put a mic on the jounals and we find that the journals are not very flat.
This is good info
http://www.youtube.com/user/cpmotors#p/u/3/mPwCsPik7KU
This is good info
http://www.youtube.com/user/cpmotors#p/u/3/mPwCsPik7KU
Burning Brakes
Joined: May 2008
Posts: 860
Likes: 0
From: Stratford Ontario
Thats a great video. It shows something Ive always believed in, that just because its new dont think that its right or perfect. Back when I worked in machine shops We would get Bowtie heads for people and redo the valve job and plain the heads. They were always warped somewhat. It usually took .02" to clean them up. My Dart 11 heads that was with My engine when I bought the car was run before He took everything apart. I had everything redone in motor and when the Guy went to regrind the valve seats He said all were perfect but one exhaust. He said the grind only touched 1/3 away around when He started. The heads supposedly came right off a pallet from Dart that was going to some race track, that they put these heads on and are race ready. That is a great video and I wish I had a grinder like that in My garage.
Race Director
Joined: Apr 2000
Posts: 17,673
Likes: 199
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I sent the 4340 4 inch stroker crank back to Eagle because it was not straight and bought from Callies. Last Eagle part I will ever buy 
Good video, shows the Chinese are getting close
Good video, shows the Chinese are getting close
Melting Slicks
Joined: Oct 2005
Posts: 2,056
Likes: 8
From: Redruth Cornwall
OK, Ill ask a dumb *** n00b question.
The guy is talking about 1-2 thou of an inch and that it needs to be cleaned up...
My question...how do you dress a grinding wheel to make sure it is completely flat and able to remove that 1-2 thou?
The guy is talking about 1-2 thou of an inch and that it needs to be cleaned up...
My question...how do you dress a grinding wheel to make sure it is completely flat and able to remove that 1-2 thou?
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
My question is kinda the OPPOSITE of Jotto's above. If a crank is put on a grinder after manufacturing, to polish the journals then HOW IS IT POSSIBLE to get that hourglass shape on the journals? It does not make sense to me.
You've got a sanding belt, or a grinding wheel against a new journal. Since the grinding apparatus is moving, how could it possibly NOT grind the journal flat?
You've got a sanding belt, or a grinding wheel against a new journal. Since the grinding apparatus is moving, how could it possibly NOT grind the journal flat?
Thread Starter
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
My question is kinda the OPPOSITE of Jotto's above. If a crank is put on a grinder after manufacturing, to polish the journals then HOW IS IT POSSIBLE to get that hourglass shape on the journals? It does not make sense to me.
You've got a sanding belt, or a grinding wheel against a new journal. Since the grinding apparatus is moving, how could it possibly NOT grind the journal flat?
You've got a sanding belt, or a grinding wheel against a new journal. Since the grinding apparatus is moving, how could it possibly NOT grind the journal flat?
More info
Here is a pic of bearings run with an Ohio taper crank shaft journals
Here is the link to look over and this pic is from page 5
http://www.camaros.net/forums/showth...hio+crankshaft[/quote]
Thread Starter
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
Crank grinders have a dressing tool that will dress the wheel flat.
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Thread Starter
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
95% of the rods we buy are on the low side and to get are clearances we always will open them up to the high side and so far have never seen a set of rods yet that the pin bores did not need honing for proper clearance.
