After Ryan K posted about a successful install of a set of Energy suspension 3.1116 motor mounts in the LS1 metal housing, I went ahead and did the mod to mine.

As he mentioned, its not a direct fit but it works <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

After removing the motor mount and separating (grinding out the rivets) the clamshell halves:

<img src="http://www.wam.umd.edu/~krzew/motormount/motermountapart.JPG" alt=" - " />

Comparison of the stock and Poly mount insert
<img src="http://www.wam.umd.edu/~krzew/motormount/motormountcompare.JPG" alt=" - " />

I forgot to snap a pic of it back together but its wedged pretty tight in the clamshell but it works. 2 of the metal tabs had to be ground off to give clearance for the bolts holding the motor mount to the engine. One other thing...the mount was a tad shorter front to back than stock...Ryan K suggested putting in 3 washers to make up the difference and it works great <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

The engine does not MOVE at all with my pretty aggressive cam...it shook violently before the install <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />

for 50 bucks...very worthwhile mod <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

<small>[ August 04, 2002, 08:44 AM: Message edited by: Fireball ]</small>

 

Did you notice a big increase in vibration when you rev it now or anything..how streetable is this mod..??

 

well it definately transmits more vibration but its a good alternative to solid motor mounts <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

how hard was this to install. my motor shakes pretty vilently with my cam. i did the homemade torque strap mod that helped a little but it still has a lil shake to it. do you have to remove anything to get to the mounts

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by bLuE11secTA:
<strong>how hard was this to install. my motor shakes pretty vilently with my cam. i did the homemade torque strap mod that helped a little but it still has a lil shake to it. do you have to remove anything to get to the mounts</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I guess every car is different...might have to pull the headers to get the motor mounts out. I didn't have to move the headers but I have a BMR K-member that may have made it a tad easier (though I did pull the alternator)...but once out it was pretty trivial if you have a grinder and drill <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Where exactly did you have to grind on the new poly mount? Did BMRs K-member come to you with new rubber engine mounts or do you just bolt over the stockers? Thanks!

 

see those 2 tabs sticking out of the side...had to cut off one on each side...

the bmr don't come with mounts just modified the stock clamshells

 

Hey Fireball....is that part number the same for both sides???

 

Brian,

will the increased vibration from the mounts along with that gargantuan cam trip the knock sensors?

 

Big mike...dunno...but its possible...

yes same part # on both sides <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

I too did the "Ryan K", #3.1116 mod... This is one of the 10 best LS1 mods to do.....

As Fireball stated, the insert is "snug-as-a-bug", in the LS1 "clamshell"...
That is a big, big PLUS with this mod as you will never get "flex" with this tight fit... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
For this reason alone, I KNOW, that this setup, WILL be better than any other vendor made mount for our application...

Sometimes, "HotRodders", ideas are better than any others, AND this is one of them... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Thanks Ryan K. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

It is also correct that you will need 3 washers to correctly space out the mount on install... This is cool, & doesn't cause ANY need for operational worry...

I only did the drivers side, as I have NO engine movement & NO NO NO NO vibration, ZERO, NONE, NOBODY could even tell that you replaced the mount... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> I can't even feel any difference with my own car !!! You can SEE the difference, blip the throttle, The engine doesn't move !!! If I blipped the throttle for you, you would start looking for a "Madman" motorplate setup...

No need to do both sides. Think about it for a second, You wouldn't put a torque-strap on both sides , would you ?????? Just ask the GN crowd, they only do the drivers-side... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Fireball comfirmed my fears that replacing both sides will lead to vibration... <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />

I've had just the one side now for approx: 6 months or more ,& it is one of the best mods that I truely belive that EVERYONE should do. It works very very well. No need for torque straps, or other "patch-work" "micky-mouse" type shortcuts...

Dave

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 2000Firehawk:
<strong> I too did the "Ryan K", #3.1116 mod... This is one of the 10 best LS1 mods to do.....

As Fireball stated, the insert is "snug-as-a-bug", in the LS1 "clamshell"...
That is a big, big PLUS with this mod as you will never get "flex" with this tight fit... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
For this reason alone, I KNOW, that this setup, WILL be better than any other vendor made mount for our application...

Sometimes, "HotRodders", ideas are better than any others, AND this is one of them... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Thanks Ryan K. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

It is also correct that you will need 3 washers to correctly space out the mount on install... This is cool, & doesn't cause ANY need for operational worry...

I only did the drivers side, as I have NO engine movement & NO NO NO NO vibration, ZERO, NONE, NOBODY could even tell that you replaced the mount... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> I can't even feel any difference with my own car !!! You can SEE the difference, blip the throttle, The engine doesn't move !!! If I blipped the throttle for you, you would start looking for a "Madman" motorplate setup...

No need to do both sides. Think about it for a second, You wouldn't put a torque-strap on both sides , would you ?????? Just ask the GN crowd, they only do the drivers-side... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Fireball comfirmed my fears that replacing both sides will lead to vibration... <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />

I've had just the one side now for approx: 6 months or more ,& it is one of the best mods that I truely belive that EVERYONE should do. It works very very well. No need for torque straps, or other "patch-work" "micky-mouse" type shortcuts...

Dave </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dave,

Very informative post! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

John

 

Pics not working... <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
Then copy and paste gives me "unauthorized" message.
I would love to see what you have done.
Thanks
Dave

 

I just ordered 2. anyone running both rather than just one?

anyone check for KR?

 

When running both mounts, does one get the washers in front of the mount and the other on the rear of the mount? It looks like the drives side needed the washers in the back, while the passengers side had the extra space in the front. The stock rubber mount is it one part number for both the left and the right?

 

Nevermind.... I found out the answer. The stock rubber mount 98-02, the left and right have the same part number. Since the stock mount is asymmetrical compared to the ES polyurethane, the extra washer will be placed in different locations according to the side. On the drivers side I wound up putting the spacers on the rear of the mount (side of mount facinf rear of car), while the passengers side the washers go on the front side of the mount.

 

What size and thickness washers are needed?

Fireball, can you repost the pics?

Thanks!

 

Fireball,

Would you repost the pictures of the poly mounts installed?

Thanks

John

 

is that the summit part #?

where are the washers needed?

I think this will be a good idea for me with the S1 cam.

 

Part number

ENS-3-1116G