SUPPORT OUR SPONSOR

Go Back   Club Cobra > Club Cobra Tech Areas > Shop Talk

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

Keith Craft Racing
Nevada Classics
MMG Superformance
Main Menu
Nevada Classics
Nevada Classics
Keith Craft Racing
MMG Superformance
Advertise at CC
Banner Ad Rates
MMG Superformance
MMG Superformance
MMG Superformance
July 2022
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31            
  #1 (permalink)  
Old 07-08-2021, 07:04 PM
FUNFER2's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2002
Location: Eagle, Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,229
Not Ranked     
Default Lining up the drive train ?

I'm changing engines from a 428FE to a Ford 460. How do I figure engine placement and engine mounts ? Then line up the engine to the transmission then to the rear end ?

All I can think of is once I have the engine placement set, place a laser on the center rear of the block, the aim it to the center of the rear end yoke.
__________________
Regards,
Kevin
Reply With Quote
Sponsored Links
Sponsored Links
  #2 (permalink)  
Old 07-09-2021, 08:04 AM
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2009
Location: Mendota, IL
Cobra Make, Engine:
Posts: 651
Not Ranked     
Default

The center line thru the crank and trans shaft need to be parallel with the pinion shaft. They need to be parallel within the working angle of the u joint. If everything is in a straight line the u joint will fail because the bearing in it will not rotate. It will then hammer the bearing out of the u joint. If the pinion angle can change because of anything other than a solid mounted rearend it should also have a small amount of down pinion angle. This is how they can offset the engine to one side or the other. Also the pinion is quite often not centered in the car or truck. Lots of diagrams on the net.
Reply With Quote
  #3 (permalink)  
Old 07-09-2021, 08:19 AM
FUNFER2's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2002
Location: Eagle, Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,229
Not Ranked     
Default

Wow, you'd think it should a perfect line to lesson vibration and keeping in sync
with each other.,
__________________
Regards,
Kevin
Reply With Quote
  #4 (permalink)  
Old 07-10-2021, 04:50 PM
CC Member
Visit my Photo Gallery

 
Join Date: May 2005
Location: Wolcott, NY
Cobra Make, Engine: CMC,Ford 302
Posts: 48
Not Ranked     
Default

Does it matter if dif is higher than trans? My engine drop is 3 down and my dif is 3 up but dif is higher than output shaft of trans.
Reply With Quote
  #5 (permalink)  
Old 07-11-2021, 04:19 PM
Tom Wells's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Mar 2000
Location: St. Augustine, FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,841
Not Ranked     
Default

Quote:
Originally Posted by DonB View Post
Does it matter if dif is higher than trans? My engine drop is 3 down and my dif is 3 up but dif is higher than output shaft of trans.
Don,

Doesn't matter.

As long as the centerline of the pinion gear and the centerline of the crankshaft/trans assembly are parallel, the car will be fine.

The direction of the offset isn't a factor. Up or down, left or right - take your pick.

Tom
__________________
Wells's law of engine size: If it matters what gear you're in, the engine's too small!
Reply With Quote
  #6 (permalink)  
Old 07-11-2021, 09:27 PM
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2009
Location: Mendota, IL
Cobra Make, Engine:
Posts: 651
Not Ranked     
Default

Quote:
Originally Posted by DonB View Post
Does it matter if dif is higher than trans? My engine drop is 3 down and my dif is 3 up but dif is higher than output shaft of trans.
Wont matter unless the pinion climbs ring gear. In that case it will get more up pinion angle. If it gets too severe it will brake the rear u joint. Under acceleration you will start to feel it binding. I dont know what type of rear setup have but if there is rubber mounts or bushings or parallel leaf springs you would be better off with the pinion set at 0 degrees.
Reply With Quote
  #7 (permalink)  
Old 07-12-2021, 06:22 AM
FUNFER2's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2002
Location: Eagle, Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,229
Not Ranked     
Default

So, lets start with the engine placement.

How do I find out where the engine is placed front to back & left to right ?
I would ask the new owner of my replica company, but he's an idiot and there's
virtually no.owners on their forum to talk to, and I don't know why other than the owner.
__________________
Regards,
Kevin

Last edited by FUNFER2; 07-12-2021 at 06:25 AM..
Reply With Quote
  #8 (permalink)  
Old 07-12-2021, 10:04 AM
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2009
Location: Mendota, IL
Cobra Make, Engine:
Posts: 651
Not Ranked     
Default

What trans is in it now? If its a stick are you going to reuse the tranny? If so you will need a different bellhousing. You will then mount the trans in the same position it is now. You will then align the engine straight in the chassis as it is now even if its offset to one side or the other. Then the mount for the engine can be made to duplicate the engine trans angel you have now. If its an auto you will be changing that too. But say for instance you were using a c 6 on the Fe and you are going to use a c6 on your new motor it s going to take a different trans. But if its the same length tailhousing and mount location you will mount it in the same location as the old one. You should be able to use your old drive shaft in both cases. In both cases above you will align the engine the same way.
Reply With Quote
  #9 (permalink)  
Old 07-12-2021, 10:21 AM
FUNFER2's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2002
Location: Eagle, Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,229
Not Ranked     
Default

Oh no, always a stick (Tremec TKO 600) unless mine is a Super Snake. lol Yep, I need a new bell and maybe a fork ?
__________________
Regards,
Kevin
Reply With Quote
  #10 (permalink)  
Old 07-12-2021, 05:08 PM
eschaider's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2006
Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4.6
Posts: 1,969
Not Ranked     
Default

Engine placement fore and aft is easy. You need the location that allows your headers to exit the fenders through the original cutouts in each front fender.

Left and right is equally easy. The headers need to be equidistant from the rocker panel on each side.

Driveline angle, as has been said by everyone already, needs to have the pinion and transmission output shafts parallel but not coincident.

Here is the graphical story;



Engines with carburetors historically had a 3˚ tilt down going towards the rear of the car. That means your pinion needs a 3˚ tilt upward.

Easy, peasy ...


Ed
__________________
.


Help them do what they would have done if they had known what they could do
.
Reply With Quote
  #11 (permalink)  
Old 07-12-2021, 05:22 PM
FUNFER2's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2002
Location: Eagle, Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,229
Not Ranked     
Default

I have a guy that will make custom 304 stainless steel headers matching my headers. I made my own sidepipes years ago, but he's better at the headers. Thank you for the graph.
__________________
Regards,
Kevin
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 03:36 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2022, 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: CC Policy