|
Figures from dialing in bellhousing runout
I think these figures are going to be OK but see what you think? I'm running a Toploader, Quicktime and bronze pilot bushing. This was the second run. After the first run I loosened the bellhousing and tapped it in the direction it was closest to centerline and then re-torqued the bolts again and re-measured. It appears this shifted it about a thousand.
Top .0128 Left .0155 Bottom .014 Right .0115 The fourth diget was just an interpretation when the needle fell between marks. Six thousands was what I remember from long ago as barely acceptable and I'm well within that. Dan |
while i have no idea what is acceptable or not...even though i have slept at several holiday-inns over the years...
but 6 thousandths is .006 your measurements are about twice that.... |
Dan,
Your measurements are vague, measured in respect to what? The point of alignment is the input shaft HAS to be in line with the crankshaft. Your numbers are twice of .006, and .006 is too much off centre in my book. Your bellhousing and/or block doesn't have dowels? |
If those are numbers read directly from the dial indicator, your runout is about 0.002" left-to-right. That's a very good number, not requiring offset dowels.
|
|
Quote:
After posting I realized I had not put in the adaptor ring in the bellhousing that the Toploader requires. I re-ran the figures with the adaptor ring in and they didn't change much althogh the ring was very slightly elliptical I found out by spinning it around in the opening and reading the stationary dial indicator. Keith Craft was to dial everything in but I'm not too sure they didn't forget so I thought I better double check it. |
Quote:
|
Dan,
I see how you do it, you are well under max spec. |
You can't have 4 numbers in the plus
DanEC Dan the spec you are looking for is .000" Have not ever seen this. If you can get down to .003" you are good. This is top to bottom and side to side. 2 of the numbers need to be negitive. The easy way is to buy the offset dowel pins and have them install and setup the bell this way. I did it the harder way with grinding out the holes, centering the bell and welding nuts on the locators for repeat assembly and bell being centered. It took 2.5 hours to get this correct. My lakewood was .038" out. I am down to .002"-.004", close enough for me.
Best thing to do is install flywheel, setup magnetic base and dial gauge and retest your measurments then come back with the numbers and we can see what off set dowels you need to get this setup into spec. 2 numbers plus and 2 numbers neg. You know which way to move bell. Once this is done, torque bell to block and get dowels install and twist to match holes. If you have the room, drilll and tap holes for bolts or allen head screws to lock the dowel in location. You are good to go after this. Rick L. |
The measurements being discussed here do not address the angle between the the crankshaft centerline and the transmission centerline. In other words, they assume that the plane of the bell housing is orthogonal ( i.e. perpendicular ) to the crankshaft axis. This is probably a good assumption for a bell housing with machined mounting surfaces ( housing to block and housing to trans). This is not the case with some of the stamped bell housing / scatter shields that I have seen. I took mine to a machine shop and had the trans end milled parallel to the block surface. When I watched the operation it was obvious that they weren't parallel to begin with.
|
| All times are GMT -7. The time now is 01:37 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: