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| My 1988 LFX F40 build. (Page 61/68) |
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RandomTask
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JAN 02, 12:10 AM
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Daryl,
Hope you're holidays are going well.
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Daryl M
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JAN 02, 05:49 PM
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| quote | Originally posted by RandomTask:
Daryl,
Hope you're holidays are going well. |
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Had my neck surgery on December 23rd. Not getting much done for a while. How was your holiday?
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Will
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JAN 03, 12:17 PM
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| quote | Originally posted by Daryl M:
Gen 1 Cadillac srx, 4 of them. They are cheap, available and were pretty easy to build brackets for. |
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Awesome!
They're similar in concept to older BMW engine mounts, but look pretty squishy.
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Daryl M
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JAN 03, 05:05 PM
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| quote | Originally posted by Will:
Awesome!
They're similar in concept to older BMW engine mounts, but look pretty squishy. |
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They are actually are pretty firm. I imagine with 280 lb/ft of torque they will move some, but I'm not sure how much.
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Will
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JAN 05, 08:53 AM
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| quote | Originally posted by Daryl M:
They are actually are pretty firm. I imagine with 280 lb/ft of torque they will move some, but I'm not sure how much. |
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It's 280 ftlbs * 3.77 first gear * 3.55 final = 3747 ftlbs, right?
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Daryl M
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JAN 05, 10:20 AM
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| quote | Originally posted by Will:
It's 280 ftlbs * 3.77 first gear * 3.55 final = 3747 ftlbs, right? |
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Your math is pretty good. In their original longitudinal application, they use 2 of these mounts, one on each side . The transmission is supported in the center, so that mount does little to resist torque. I figure 4 of the mounts plus a dog bone on top and I should be ok.
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fieroguru
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JAN 05, 10:43 AM
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| quote | Originally posted by Daryl M:
Your math is pretty good. In their original longitudinal application, they use 2 of these mounts, one on each side . The transmission is supported in the center, so that mount does little to resist torque. I figure 4 of the mounts plus a dog bone on top and I should be ok. |
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The longitudinal setup the engine mounts don't experience the final drive torque multiplication due to the 90 degree angle change at the rear end. This means your engine mounts will have to resist 3.55 times the torque loads as the longitudinal setup, so doubling up on the mounts helps, doubles the torque load holding... Granted there is a safety factor built into the mounts, so it they will likely keep the drivetrain in place, but it could move more than you expect.
This is what I always use 4 corner mounts with lower control arm bushings (fully encapsulated and pretty stiff) and space them as far apart as possible.
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Daryl M
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JAN 12, 09:51 AM
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| quote | Originally posted by fieroguru:
The longitudinal setup the engine mounts don't experience the final drive torque multiplication due to the 90 degree angle change at the rear end. This means your engine mounts will have to resist 3.55 times the torque loads as the longitudinal setup, so doubling up on the mounts helps, doubles the torque load holding... Granted there is a safety factor built into the mounts, so it they will likely keep the drivetrain in place, but it could move more than you expect.
This is what I always use 4 corner mounts with lower control arm bushings (fully encapsulated and pretty stiff) and space them as far apart as possible. |
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Very good point. I too placed the mounts as far apart as practical. It will be interesting to see how this experiment works out.
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RandomTask
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MAR 25, 03:40 PM
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Franked
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JUN 11, 11:58 PM
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Bumpity Bump..
Daryl, anything new? I recently got myself an F40 trans, still quite some time before I actually focus on my (LS4) build here, I want to see how yours is coming along, that looks like a really good V6 swap alternative to the LS4
F
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