Engine Mounts, Engine Mounts |
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Engine Mounts, Engine Mounts |
Not_A_Six |
Dec 1 2018, 12:18 PM
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#1
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
Hi All-
New member here. I have the engine out of my '73 2.0 to address some fluid leaks and noticed that the engine mounts were unusual. Going through old paperwork, I found that a PO had installed "Club/Sport" engine mounts 15 years ago. The car is a '73 with stock side-shift trans and cross bar with the hole in it for the trans linkage. But the engine is mounted to the crossbar with solid aluminum blocks and the crossbar is mounted to the chassis with rubber -- similar to the older style tail shift factory mounts -- instead of the inboard rubber+outboard solid mount expected. I'm inclined to return it to stock, but I'm trying to understand the purpose of the "Sport" mounts. Online searches suggest that 911 "Sport Mounts" are used somehow for /6 conversions, but I don't know why PO changed from the stock mount with the factory 2L engine/trans. Thanks for your help. FWIW, pic of my baby is attached. |
ndfrigi |
Dec 1 2018, 12:28 PM
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#2
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Advanced Member Group: Members Posts: 2,933 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California |
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Not_A_Six |
Dec 1 2018, 12:33 PM
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#3
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
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SirAndy |
Dec 1 2018, 12:42 PM
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#4
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Resident German Group: Admin Posts: 41,679 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Was this maybe a track mod back in the day? No, see my post above. Your setup makes things worse, especially on the track. (IMG:style_emoticons/default/shades.gif) |
Not_A_Six |
Dec 1 2018, 01:17 PM
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#5
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
Was this maybe a track mod back in the day? No, see my post above. Your setup makes things worse, especially on the track. (IMG:style_emoticons/default/shades.gif) Thanks. So, are you saying that the engine would move more with the rubber at the ends of the crossbar than it would with the rubber inboard? On which axis? (Pitch? Roll? Yaw?) I'd guess that it would flex less due to the longer moment arm between the rubber points (unless the outboard rubber is more flexy than the inboard rubber...) Thanks again. I think I'm gonna return it to stock as you suggested. But, I'm just trying to understand why this mod was ever made in the first place. |
SirAndy |
Dec 1 2018, 01:24 PM
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#6
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Resident German Group: Admin Posts: 41,679 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
So, are you saying that the engine would move more with the rubber at the ends of the crossbar than it would with the rubber inboard? On which axis? (Pitch? Roll? Yaw?) No, i'm saying that with the correct setup (solid outer mounts, rubber engine mounts) the movement of the engine does *not* affect your cross-bar, which is where your shift rod goes through. With your current setup, the cross-bar moves with the engine under torque load and since the clearances are already tight on the hole for the shift rod, you will have the engine bar hitting the shift rod. When the shift rod hits the engine bar it makes it very difficult or impossible to shift. This usually happens when you combine g-force with torque. For example, when hitting the gas coming out of a tight corner. (IMG:style_emoticons/default/shades.gif) |
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