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CC Advertisers
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07-08-2021, 07:04 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,306
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Not Ranked
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
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07-09-2021, 08:04 AM
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CC Member
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Join Date: Mar 2009
Location: Mendota,
IL
Cobra Make, Engine:
Posts: 694
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Not Ranked
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.
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07-09-2021, 08:19 AM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,306
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Not Ranked
Wow, you'd think it should a perfect line to lesson vibration and keeping in sync
with each other.,
__________________
Regards,
Kevin
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07-10-2021, 04:50 PM
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CC Member
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Join Date: May 2005
Location: Wolcott,
NY
Cobra Make, Engine: CMC,Ford 302
Posts: 56
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Not Ranked
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.
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07-11-2021, 04:19 PM
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Senior Club Cobra Member
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Join Date: Mar 2000
Location: St. Augustine,
FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,917
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Not Ranked
Quote:
Originally Posted by DonB
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.
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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!
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07-11-2021, 09:27 PM
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CC Member
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Join Date: Mar 2009
Location: Mendota,
IL
Cobra Make, Engine:
Posts: 694
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Not Ranked
Quote:
Originally Posted by DonB
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.
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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.
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07-12-2021, 06:22 AM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,306
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Not Ranked
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..
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07-12-2021, 05:08 PM
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CC Member
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Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,660
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Not Ranked
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.
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07-12-2021, 05:22 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,306
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Not Ranked
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
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