Different poly motor mount options?
Thread Starter
Racer
Joined: Feb 2008
Posts: 410
Likes: 0
From: Topeka KS
Different poly motor mount options?
I see that Pfadt makes a very quality piece as well as VBP but what about the ones that are a bit cheaper on the auction site? Anyone try those? After my H/C setup I would like to try some stiffer motor mounts but $250 is pricey...my Trans Am was like $50 for poly mounts!
Instructor
Joined: Aug 2008
Posts: 146
Likes: 0
Ultra mount makes urethane motor mounts that go for $100 on eBay. They warranty the mounts with a lifetime warranty. If it breaks they claim that they will replace the mount and give you your money back. Plus the 800 number is on the mounts, so it seems that they stand by their products. Plus, if you wanna get crazy they have solid aluminum mounts for $40.
Thread Starter
Racer
Joined: Feb 2008
Posts: 410
Likes: 0
From: Topeka KS
Ultra mount makes urethane motor mounts that go for $100 on eBay. They warranty the mounts with a lifetime warranty. If it breaks they claim that they will replace the mount and give you your money back. Plus the 800 number is on the mounts, so it seems that they stand by their products. Plus, if you wanna get crazy they have solid aluminum mounts for $40.
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
I see that Pfadt makes a very quality piece as well as VBP but what about the ones that are a bit cheaper on the auction site? Anyone try those? After my H/C setup I would like to try some stiffer motor mounts but $250 is pricey...my Trans Am was like $50 for poly mounts!
Thread Starter
Racer
Joined: Feb 2008
Posts: 410
Likes: 0
From: Topeka KS
Mine are fine but I've got a very low rpm rattle/knock that you can really only hear if it dips below say 800 rpms. Also it's picking up some knock b/w 3200-3800 and I just want to eliminate any rattling from being the source. I had poly mounts on my Trans Am and it didn't bother me at all. From the sound of it they're much easier to install on a C5 than the F-bod.
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Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Instructor
Joined: Mar 2007
Posts: 204
Likes: 1
From: Grand Rapids Michigan
I mean compared to all the other options, Ultras are the way to go. I took out stockers for the solids and they greatly increased noice and vibration, the poly are inbetween stockers and solids and are more my taste.
Burning Brakes
Joined: Oct 2005
Posts: 954
Likes: 1
From: Salt Lake City UT
St. Jude Donor '08
Autocross & Roadrace Forum Sponsor
It has some great properties and some terrible properties that all have to be accounted for in a design. There are also many different grades of polyurethane that have different damping characteristics and different durability. We have spent a lot of time tuning the exact characteristics of our mounts, hence the customer satisfaction that we have.The Pfadt mounts use a set of replaceable poly 'hat bushings' that have a carefully calculated amount of deflection. It is difficult to get the correct balance between isolation of vibration and control of movement. At Pfadt we have developed a very lightweight design that holds the engine in place without causing any annoying vibration in the interior. Also with the Pfadt design, the engine is captured regardless of the state of the polyurethane. That way even if the poly fails, the engine will still be held in place. That is not the case with many designs.
Pfadt C5 Engine Mounts
-Aaron
Melting Slicks
Joined: Oct 2007
Posts: 2,464
Likes: 2
From: Cedarburg, WI
I wish that was true. Poly is one of the best and worst materials all at the same time. It has some great properties and some terrible properties that all have to be accounted for in a design. There are also many different grades of polyurethane that have different damping characteristics and different durability. We have spent a lot of time tuning the exact characteristics of our mounts, hence the customer satisfaction that we have.
The Pfadt mounts use a set of replaceable poly 'hat bushings' that have a carefully calculated amount of deflection. It is difficult to get the correct balance between isolation of vibration and control of movement. At Pfadt we have developed a very lightweight design that holds the engine in place without causing any annoying vibration in the interior. Also with the Pfadt design, the engine is captured regardless of the state of the polyurethane. That way even if the poly fails, the engine will still be held in place. That is not the case with many designs.
Pfadt C5 Engine Mounts
-Aaron
It has some great properties and some terrible properties that all have to be accounted for in a design. There are also many different grades of polyurethane that have different damping characteristics and different durability. We have spent a lot of time tuning the exact characteristics of our mounts, hence the customer satisfaction that we have.The Pfadt mounts use a set of replaceable poly 'hat bushings' that have a carefully calculated amount of deflection. It is difficult to get the correct balance between isolation of vibration and control of movement. At Pfadt we have developed a very lightweight design that holds the engine in place without causing any annoying vibration in the interior. Also with the Pfadt design, the engine is captured regardless of the state of the polyurethane. That way even if the poly fails, the engine will still be held in place. That is not the case with many designs.
Pfadt C5 Engine Mounts
-Aaron
Racer
Joined: Jun 2006
Posts: 250
Likes: 0
From: SLC UT
St. Jude Donor '08-'09
Autocross & Roadrace Forum Sponsor
Kind regards,
Racer
Joined: Dec 2005
Posts: 426
Likes: 0
From: Northern Virginia
Ok Here's my ultra mount experience...
They are 1/4 to 3/8 inch higher than the stock mounts and I ran into clearance issues when installing my FAST intake. Not wanting to cut my fire wall, I'm looking for other options.
If your running a LS6 or stock ls1 intake it will probably be fine.
Its a lot of work to get to putting on the intake manifold and to find out the marginal height increase is a real issue. It would definately be worth the extra $$ not to have to reinstall them. Looks like I should schedule another day under the car.
Jordan,
How tall are your mounts?
THanks
They are 1/4 to 3/8 inch higher than the stock mounts and I ran into clearance issues when installing my FAST intake. Not wanting to cut my fire wall, I'm looking for other options.
If your running a LS6 or stock ls1 intake it will probably be fine.
Its a lot of work to get to putting on the intake manifold and to find out the marginal height increase is a real issue. It would definately be worth the extra $$ not to have to reinstall them. Looks like I should schedule another day under the car.
Jordan,
How tall are your mounts?
THanks
Thread Starter
Racer
Joined: Feb 2008
Posts: 410
Likes: 0
From: Topeka KS
Ok Here's my ultra mount experience...
They are 1/4 to 3/8 inch higher than the stock mounts and I ran into clearance issues when installing my FAST intake. Not wanting to cut my fire wall, I'm looking for other options.
If your running a LS6 or stock ls1 intake it will probably be fine.
Its a lot of work to get to putting on the intake manifold and to find out the marginal height increase is a real issue. It would definately be worth the extra $$ not to have to reinstall them. Looks like I should schedule another day under the car.
Jordan,
How tall are your mounts?
THanks
They are 1/4 to 3/8 inch higher than the stock mounts and I ran into clearance issues when installing my FAST intake. Not wanting to cut my fire wall, I'm looking for other options.
If your running a LS6 or stock ls1 intake it will probably be fine.
Its a lot of work to get to putting on the intake manifold and to find out the marginal height increase is a real issue. It would definately be worth the extra $$ not to have to reinstall them. Looks like I should schedule another day under the car.
Jordan,
How tall are your mounts?
THanks
Burning Brakes
Joined: Oct 2005
Posts: 954
Likes: 1
From: Salt Lake City UT
St. Jude Donor '08
Autocross & Roadrace Forum Sponsor
Ok Here's my ultra mount experience...
They are 1/4 to 3/8 inch higher than the stock mounts and I ran into clearance issues when installing my FAST intake. Not wanting to cut my fire wall, I'm looking for other options.
If your running a LS6 or stock ls1 intake it will probably be fine.
Its a lot of work to get to putting on the intake manifold and to find out the marginal height increase is a real issue. It would definately be worth the extra $$ not to have to reinstall them. Looks like I should schedule another day under the car.
Jordan,
How tall are your mounts?
THanks
They are 1/4 to 3/8 inch higher than the stock mounts and I ran into clearance issues when installing my FAST intake. Not wanting to cut my fire wall, I'm looking for other options.
If your running a LS6 or stock ls1 intake it will probably be fine.
Its a lot of work to get to putting on the intake manifold and to find out the marginal height increase is a real issue. It would definately be worth the extra $$ not to have to reinstall them. Looks like I should schedule another day under the car.
Jordan,
How tall are your mounts?
THanks
-Aaron
Racer
Joined: Dec 2005
Posts: 426
Likes: 0
From: Northern Virginia
Thank you Aaron, I'm going to see if willfulone has any here locally for purchase.
My Map sensor is hitting the back of the firewall.
If you look at the ultra mount products offered, it looks like the mount might be the same as a Supra mount. I think they just use a steel core with a threaded rod through it and sorround the whole thing with polyurathane, so basically it's a solid mount. I don't think there's anything wrong with that, but the height should be a little lower.. about 1/4 to 3/8 inch.
I managed to turn my map sensor around (harness connecting to the drivers side) and get enough slack in the connecting wireing harness that after givning the harness and sensor a little guidance, the manifold was able to pop into place. Now I just need to do it while holding up the bolts.
The only thing that worries me is that, esp with the headers, what other clearances aren't what they should be?
My Map sensor is hitting the back of the firewall.
If you look at the ultra mount products offered, it looks like the mount might be the same as a Supra mount. I think they just use a steel core with a threaded rod through it and sorround the whole thing with polyurathane, so basically it's a solid mount. I don't think there's anything wrong with that, but the height should be a little lower.. about 1/4 to 3/8 inch.
I managed to turn my map sensor around (harness connecting to the drivers side) and get enough slack in the connecting wireing harness that after givning the harness and sensor a little guidance, the manifold was able to pop into place. Now I just need to do it while holding up the bolts.
The only thing that worries me is that, esp with the headers, what other clearances aren't what they should be?
Last edited by dmiz0420; Aug 20, 2009 at 10:00 AM.
Thread Starter
Racer
Joined: Feb 2008
Posts: 410
Likes: 0
From: Topeka KS
Thank you Aaron, I'm going to see if willfulone has any here locally for purchase.
My Map sensor is hitting the back of the firewall.
If you look at the ultra mount products offered, it looks like the mount might be the same as a Supra mount. I think they just use a steel core with a threaded rod through it and sorround the whole thing with polyurathane, so basically it's a solid mount. I don't think there's anything wrong with that, but the height should be a little lower.. about 1/4 to 3/8 inch.
I managed to turn my map sensor around (harness connecting to the drivers side) and get enough slack in the connecting wireing harness that after givning the harness and sensor a little guidance, the manifold was able to pop into place. Now I just need to do it while holding up the bolts.
The only thing that worries me is that, esp with the headers, what other clearances aren't what they should be?
My Map sensor is hitting the back of the firewall.
If you look at the ultra mount products offered, it looks like the mount might be the same as a Supra mount. I think they just use a steel core with a threaded rod through it and sorround the whole thing with polyurathane, so basically it's a solid mount. I don't think there's anything wrong with that, but the height should be a little lower.. about 1/4 to 3/8 inch.
I managed to turn my map sensor around (harness connecting to the drivers side) and get enough slack in the connecting wireing harness that after givning the harness and sensor a little guidance, the manifold was able to pop into place. Now I just need to do it while holding up the bolts.
The only thing that worries me is that, esp with the headers, what other clearances aren't what they should be?
Racer
Joined: Dec 2005
Posts: 426
Likes: 0
From: Northern Virginia
Sounds like this is a common issue that is easily overcome, I found a lot of posts on it as well.
The C6 guys have a lot more work to do to make their FAST fit.
All in all the mounts are in and considering the work involved, they are staying that way for now, there's nothing wrong with them, and I'll eventually be back in there... So may as well give it a go.
The C6 guys have a lot more work to do to make their FAST fit.
All in all the mounts are in and considering the work involved, they are staying that way for now, there's nothing wrong with them, and I'll eventually be back in there... So may as well give it a go.
