Mega Motor Mount Mashup

[Funkjaw]

Swapped the transmission mounts, idle is tolerable. Not seeing a need to remove the engine mounts to cut or remove the top piece. If I decide to go Femto and all, I'll most likely swap back to the Powerflex transmission mounts and raise the idle a little bit.

I do like it better with both the engine and transmission mounts swapped, it's the NVH at idle that makes it a no go for me.

The Windo-Weld idea is interesting, seems people have been using it for engine and transmission mounts for years. Not sure how well it would work as ours aren't encased, you'd have to figure out a way to encase them while curing. From what I've read it takes 3+ days for the Windo-Weld to cure.

Thanks for the update!

Yeah I was thinking of encasing the mounts in a sort of mold and letting it cure for a week. If I do this crazy idea I'll post about it.

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[NicKnack]

I'm wondering if maybe the lower Powerflex mounts with something like a diff brace, and skipping the trans-mounts would raise idle NVH to an untolerable level.

Those two have been my primary complaints, OEM engine Mounts and diff mounts/bushings just seem a bit soft/have too much play.

 

[Strat-Supra]

I installed the VTT diff brace prior to the engine and transmission mounts, and didn't notice any additional NVH. I did solid diff bushings on another car and additional NVH was very noticeable, but I was younger and didn't care as much.

Currently I have both engine mount inserts and the VTT diff brace, the NVH isn't that bad. There's a little at times when idling especially after taking it out of gear and coming to a stop, but it seems to be only when the rpm drops slightly below normal idle rpm.

 

[FLtrackdays]

I have not - I like to start closest to the engine and work backwards

Also, ???

If you order from Verkline when they’re out of stock, they’ll put you in the front of the line with their next batch. I did that with their front end parts. One came in as a straggler. But it did come in.

As far as those rear adjustable traction links, that’s the only rear end piece I do have (yet). igi3Pete is right, they are fantastic!

 

[Funkjaw]

If you order from Verkline when they’re out of stock, they’ll put you in the front of the line with their next batch. I did that with their front end parts. One came in as a straggler. But it did come in.

As far as those rear adjustable traction links, that’s the only rear end piece I do have (yet). igi3Pete is right, they are fantastic!

Ahh I wasn't aware of this. Guess I'll be getting in line, thank you Mark!

 

[Funkjaw]

Made a small update to my original post about the power flex inserts. Essentially in cold-freezing weather wheel hop is definitely still there, just not as much as it was without the inserts.

 

[lucky phil]

I fail to see how engine mounts have any influence on wheel hop.

Phil

 

[Funkjaw]

I fail to see how engine mounts have any influence on wheel hop.

Phil

Less engine movement means less bushing deflection along the chassis but more importantly along the drivetrain which is a primary source of wheel hop in a RWD platform. It also means less pinion angle slop making a smoother power delivery to the rear differential.

Now to your point it doesn't matter nearly as much as it would in a FWD platform that's for sure.

 

[lucky phil]

Less engine movement means less bushing deflection along the chassis but more importantly along the drivetrain which is a primary source of wheel hop in a RWD platform. It also means less pinion angle slop making a smoother power delivery to the rear differential.

Now to your point it doesn't matter nearly as much as it would in a FWD platform that's for sure.

Can't agree with this in an IRS setup. The diff and engine can move about all they like within reason. Wheel hop is about uncontrolled wheel movement and related to the suspensions ability to offer the required control via suspension geometry, control arm and control arm bush flex, damper performance, tyre construction and sprung weight. Uni joints and drive shaft couplings are there to isolate the drivetrain dynamics from the wheel and suspension dynamics.

Phil

 

[Happy Polar Bear]

I installed the VTT diff brace prior to the engine and transmission mounts, and didn't notice any additional NVH. I did solid diff bushings on another car and additional NVH was very noticeable, but I was younger and didn't care as much.

Currently I have both engine mount inserts and the VTT diff brace, the NVH isn't that bad. There's a little at times when idling especially after taking it out of gear and coming to a stop, but it seems to be only when the rpm drops slightly below normal idle rpm.

Hi Strat-Supra, I'm now running with the powerflex transmission mounts only and looking to further upgrade with the engine mounts and diff brace. The transmission mounts already make a lot of NVH, making me think if adding those two will make it even worse...

How's your experience so far with the engine mounts and diff brace? Does them improve the throttle response already? One reason why I don't want to uninstall the transmission mounts is to keep the improved throttle response. So just would like some of your inputs. Thanks.

 

[lucky phil]

Hi Strat-Supra, I'm now running with the powerflex transmission mounts only and looking to further upgrade with the engine mounts and diff brace. The transmission mounts already make a lot of NVH, making me think if adding those two will make it even worse...

How's your experience so far with the engine mounts and diff brace? Does them improve the throttle response already? One reason why I don't want to uninstall the transmission mounts is to keep the improved throttle response. So just would like some of your inputs. Thanks.

Engine mounts improve throttle response?? So throttle response is generally considered a reflection of the engines ability to increase rpm or output over time with relation to demand/throttle input. Can't see how engine mounts influence this.
Phil

 

[Happy Polar Bear]

Engine mounts improve throttle response?? So throttle response is generally considered a reflection of the engines ability to increase rpm or output over time with relation to demand/throttle input. Can't see how engine mounts influence this.
Phil

Throttle response is not just about engine tuning—it's about how quickly and predictably engine power reaches the ground.

• Stiff mounts reduce compliance in the drivetrain.
• Less flex = less delay or "mushiness" when you press the throttle.
• Result: Sharper, more immediate acceleration, especially during rapid throttle changes or hard driving.

 

[swrdply400mrelay]

Hi Strat-Supra, I'm now running with the powerflex transmission mounts only and looking to further upgrade with the engine mounts and diff brace. The transmission mounts already make a lot of NVH, making me think if adding those two will make it even worse...

How's your experience so far with the engine mounts and diff brace? Does them improve the throttle response already? One reason why I don't want to uninstall the transmission mounts is to keep the improved throttle response. So just would like some of your inputs. Thanks.

Do you feel that shifting is more precise/less slop with the transmission mounts? Or no difference?

 

[razorlab]

Engine mounts improve throttle response?? So throttle response is generally considered a reflection of the engines ability to increase rpm or output over time with relation to demand/throttle input. Can't see how engine mounts influence this.
Phil

I more appropriate term would be power response I think. He is talking about reducing the slop in the powertrain so the request of power to actual power isn't muted with jelly mounts.

 

[Happy Polar Bear]

Do you feel that shifting is more precise/less slop with the transmission mounts? Or no difference?

I don't think transmission mounts only will offer that improvement. So I also swapped the shifter bushing to Rogue Engineering G8X M2 / M3 / M4 shifter carrier bushing kit, which eliminates the rubbery feeling and offers a more precise shift experience.

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