Motor Mounts, What is the benefit of the hard nylon ones over the 911 sport mounts? |
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Motor Mounts, What is the benefit of the hard nylon ones over the 911 sport mounts? |
VaccaRabite |
Dec 12 2007, 07:35 PM
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#1
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En Garde! Group: Admin Posts: 13,444 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I am getting ready to put my motor and tranny back in the car. Now would be the time to get new motor mounts.
What is the difference between the harder nylon or aluminum mounts, and the rubber mounts? |
Dave_Darling |
Dec 12 2007, 10:13 PM
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#2
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The drivetrain won't move around as much. In particular, if you're replacing the trans mounts (the 911 "sport mounts" won't replace the front ones in a 73+ car!) the shifting should be more precise and less affected by loads on the car. The downside is more noise transmitted from the trans to the chassis. Possibly more vibration and harshness as well, but definitely more noise.
--DD |
GeorgeRud |
Dec 12 2007, 11:40 PM
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#3
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
I used the sport rubber mounts up front on my Rich Johnson mount, and the nylon ones back at the transmission mounts ( the ones made for the 914 by WEVO). Provides nice shifting, not too much noise or vibration.
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chris914 |
Dec 13 2007, 02:13 AM
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#4
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Member Group: Members Posts: 489 Joined: 24-July 04 From: San Diego, CA Member No.: 2,393 Region Association: Southern California |
I have the WEVO mounts, very nice mounts and very nice person.
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ConeDodger |
Dec 13 2007, 10:37 AM
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#5
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Apex killer! Group: Members Posts: 23,589 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
I used the JWest front mounts when I installed the new 2270 Raby Kit motor. My dentist appointment is next week (IMG:style_emoticons/default/sad.gif) .
Actually, for what they do they are fine. If you have a dedicated autocross car that you trailer to the event or you absolutely have to have that last .01 second... If you street drive the car they are a bit harsh. I will keep them because I probably will build a dedicated car someday. But, new rubber OEM will go in soon. |
john rogers |
Dec 13 2007, 10:45 AM
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#6
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
Besides a bit more noise, a big drawback of solid mounts is twisting of the engine/transmission assembly if the car flexes and twists. If there is a full cage installed and some rear bracing then the issue is not so great but if the body flexes a lot, I.E. lifting the front wheel, etc, then accelerated R&P wear can occur.
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sean_v8_914 |
Dec 13 2007, 11:23 AM
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#7
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
I had them on my AX car. although she is primarily an AX car, I do like a twisty road every now and then. they are harsh and should be reserved for dedicated track cars. I removed them on my car and on several other customers cars. John brought up something I had not thought of. when we modify one thing, it can change or influence something else. a car is a system, not a series of components.
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gary gartner |
Dec 13 2007, 01:01 PM
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#8
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i know more than a newbie---way less than a guru Group: Members Posts: 239 Joined: 16-December 04 From: Valencia, Ca Member No.: 3,294 Region Association: Southern California |
So, guys, are the 911 sportmounts a good replacement for OEM trans mounts??? I just replaced old tattered OEM in my 75 with weltmeister and do not like the noise I get with Weltmeister. will the 911 sports return me to the quiet I used to enjoy??? TIA Gary |
nein14 |
Dec 14 2007, 07:37 AM
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#9
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Senior Member Group: Members Posts: 838 Joined: 6-February 03 From: USA Member No.: 262 |
I just replaced the stock rubber mount with the JWest Nylon ones.
The car already had the 911 sport mounts on the tranny, I took it one set further and modified the engine bar (shortened the ends) and installed the 911 sport mounts there also. Everything feels more positive. (IMG:style_emoticons/default/driving.gif) |
purple |
Dec 14 2007, 07:42 AM
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#10
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Pigeon feeders attract me Group: Members Posts: 938 Joined: 24-July 07 From: Houston, TX Member No.: 7,942 Region Association: None |
I have a set of the hard nylons. I also have a decent set of stock rubbers for the engine.
The tranny has broken rubbers that look original that i'm replacing with the windrush mounts (the look GORGEOUS) I had planned to put in the hard nylons too. The nearest track to me is around 60 miles away. The teener will be a fun car for nice days drives to work as well as going to the track. Would I be better served by the rubbers or the nylons for the engine? The tranny will have the wevo mounts either way |
RoadGlue |
Dec 14 2007, 02:55 PM
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#11
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Sonoma County Gear Head Group: Admin Posts: 2,033 Joined: 8-January 03 From: Santa Rosa, CA Member No.: 108 Region Association: Northern California |
I used the JWest front mounts when I installed the new 2270 Raby Kit motor. My dentist appointment is next week (IMG:style_emoticons/default/sad.gif) . Actually, for what they do they are fine. If you have a dedicated autocross car that you trailer to the event or you absolutely have to have that last .01 second... If you street drive the car they are a bit harsh. I will keep them because I probably will build a dedicated car someday. But, new rubber OEM will go in soon. I wouldn't say teeth chattering, but yes, the Jwest mounts are going back on the shelf and I'm putting rubber front mounts back in the next time the motor's out. I've always run nylon mounts at the transaxle, and I've never noticed much additional noise or vibration from that mod. Great for a track car, just not worth it for the street. I have a pretty high tolerance for pain too! The 914's my daily driver though, and it's on the long trips where it really starts to bug me. |
Joe Ricard |
Dec 14 2007, 04:48 PM
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#12
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
I have polyethelene (Plastic cutting board) for motor mounts and some fairly solid rear mounts of my making. (aluminum plate and rubber surounded by pipe section welded to the plate). Put 27,000 miles on them. Life was good till I put 300 lb springs and solid trailing arm bushings in it.
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SirAndy |
Dec 14 2007, 05:48 PM
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#13
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
my 3.6L and 901 tranny are held in place by 4 911 sport mounts.
two for the motor using the Rich Johnson bulkhead motor mount and two used as tranny mounts. IMHO, for a street driven car, solid mounts are overkill and too harsh. the 911 sportmounts are a nice compromise have worked very well for me so far. (IMG:style_emoticons/default/bye1.gif) Andy |
J P Stein |
Dec 14 2007, 06:05 PM
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#14
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
I use the Sport mounts up front and Wevos in the rear. I'm gonna switch the front to Wevos. I feel the sport mounts are allowing the front of the motor to move around too much. NVH is not a big concern on the shitbox, but the Wevos are a good compromise.
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slim72914 |
Dec 15 2007, 10:15 AM
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#15
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Member Group: Members Posts: 153 Joined: 4-July 07 From: Mesa, AZ Member No.: 7,874 |
Does anyone make polyurethane bushings like they make for all the chevy v8s??? If not someone should get on that....
Anyone have an injection molding machine not doing anything???? |
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