Lowering engine benefits
Thread Starter
Le Mans Master
Joined: Aug 2013
Posts: 5,969
Likes: 1,410
Lowering engine benefits
Hey
Curious this applies to the c5 and 6 I'm sure. There is extra room to lower the motor before it hits the front sub frame. Some suppliers offer a bit lower but does it make a noticeable change with the time and money?
Yes lowering the engine 1/2" will decrease the cg torque on the roll center height.
Anyone see a difference other than increased durometer from the harder bushing? Less front roll?
Thanks
Curious this applies to the c5 and 6 I'm sure. There is extra room to lower the motor before it hits the front sub frame. Some suppliers offer a bit lower but does it make a noticeable change with the time and money?
Yes lowering the engine 1/2" will decrease the cg torque on the roll center height.
Anyone see a difference other than increased durometer from the harder bushing? Less front roll?
Thanks
Racer
Joined: May 2011
Posts: 258
Likes: 0
From: Acworth Georgia
My builder just installed a set of lower poly motor mounts on mine. They said it is recommended when installing the FAST intake and it will also allow you to get to the MAP sensor if/when it fails.
Burning Brakes
Joined: Dec 2003
Posts: 1,243
Likes: 5
From: Loveland CO
Hinson makes stock length and shorter Polly mounts.. i wouldnt waste time making them yourself.. they are cheap and VERY well built. Most guys do it for more room to fit a larger intake manifold (FAST 102) or to get more feel from the car. im sure there are other reasons but thoes are the 2 i have read the most about.
Last edited by RedZMonte; Oct 9, 2013 at 04:44 PM.
Safety Car
Joined: Aug 2011
Posts: 4,447
Likes: 409
From: Portland OR
I have the Hinson mounts. For what they are, the cost is outrageous in my book. If energy Suspension made them, the cost would be 1/3.
I had to use them to fit the FAST 102 intake.
They are 3/8" lower. My headers have never hit anything.
I have no clue if they helped the handling.
Ron
I had to use them to fit the FAST 102 intake.
They are 3/8" lower. My headers have never hit anything.
I have no clue if they helped the handling.
Ron
Thread Starter
Le Mans Master
Joined: Aug 2013
Posts: 5,969
Likes: 1,410
Looking from a technical side, the closer the cg is to the roll center the smaller the roll couple is and thus less roll on a turn.
Theoretically with the cg and roll center perfectly at the same height there would be zero roll.
Theoretically with the cg and roll center perfectly at the same height there would be zero roll.
Instructor
Joined: Feb 2012
Posts: 125
Likes: 0
From: Bristol CT
Lower the engine and inch or so will theoretically improve transitional steering response due to a lower center of gravity of the main source of weight on the front suspension components. Will you feel it? Yes, if you push your car hard through corners consistently you will notice a slight improvement in front end stability and responsiveness. Will it be dramatic? No.
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Safety Car
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
I have the lower engine mounts and I can't say I can tell any difference from it being any lower but I can tell it has more torque to the tires and the car doesn't shake from the cam like it did.
Thread Starter
Le Mans Master
Joined: Aug 2013
Posts: 5,969
Likes: 1,410
A part that interests me is the reduction in drive train shake. With the Irs in the back, I hear the wheel hop enjoys breaking parts. Is this a situation where stiffening the engine and or trans mount will help? Or is it more to do with the soft rubber bushings in the arms themselves? I'm looking at making some delrin bushings for the arms in my lathe.
The mounts I'd like to run a bit stiffer. I don't buy the torque wasted by soft bushings that seems to be spread around as the engine will still use the exact same energy under twist regardless of how it's mounted.
The mounts I'd like to run a bit stiffer. I don't buy the torque wasted by soft bushings that seems to be spread around as the engine will still use the exact same energy under twist regardless of how it's mounted.