LT's and motor mounts
Thread Starter
TECH Addict
Joined: Apr 2009
Posts: 2,354
Likes: 2
LT's and motor mounts Just about to install the long tubes on my ls1. My question is do the motor mounts need to be replaced. I have heard stories about the headers hitting the car if they are not changed. :/
dude....save yourself the headache and do them now at once....the banging on the floorboards will **** you off. its not like you would think, its a loud thump. but the motormounts are way harder then the headers to install. also will take you 10x longer to install, BUT DO THEM WHILE YOUR UNDER THERE
I agree. Do the motor mounts while you are in there. I did my LT headers and then had to do the motor mounts later, and it was a huge pain in the ***. I ended up pulling the headers back off to get to them.
I went with poly mounts from Energy Suspension, they really stiffen up the entire powertrain. The downside is you get some more resonance, noise, and vibations in the cabin, but nothing too bad. I could easily live with mine as a DD.
I went with poly mounts from Energy Suspension, they really stiffen up the entire powertrain. The downside is you get some more resonance, noise, and vibations in the cabin, but nothing too bad. I could easily live with mine as a DD.
You barely notice them at speed and idle, the car shakes and vibrates a bit more, but its barely noticeable. The only time you really notice them is if you let the rpm go below 800 or so(such at taking off in 1st with an M6 and don't give it enough gas). I actually like the vibrations and shaking the car does now. It's a muscle/pony car, we're not driving smooth luxury sedans.
I'm running solids on the motor and poly on the tranny. I love them, wouldn't go back to stock.
I'm running solids on the motor and poly on the tranny. I love them, wouldn't go back to stock.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo 
TECH Apprentice
Joined: May 2004
Posts: 318
Likes: 14
From: Chicago, IL
I don't know how good you are with this stuff, but I put the "OMGStupidDumbAss" in "Noob". I'm taking a ton of pics of my MM/headers install and I'm hoping to supplement the https://ls1tech.com/forums/generatio...r-written.html with pics.
But until then, you can see how noobish I am with the obstacles I'm running through, but, if anything, pics of where I'm at here:
https://ls1tech.com/forums/generatio...-bad-help.html
This is what I ordered:
http://www.summitracing.com/parts/PTP-7-512BL/
Although I got the red ones which were $11 more expensive.
But until then, you can see how noobish I am with the obstacles I'm running through, but, if anything, pics of where I'm at here:
https://ls1tech.com/forums/generatio...-bad-help.html
This is what I ordered:
http://www.summitracing.com/parts/PTP-7-512BL/
Although I got the red ones which were $11 more expensive.
