Glad to hear someone acknowledging the OEM pitch mount is designed to rock or should we say pitch hence pitch mount. My only gripes is if you change to aftermarket (nvh aside) how much more stress are you placing on the other two engine mounts? In Australia/UK what they do with the Yaris is replace/strengthen the other two mounts when changing out the pitch mount. Three cylinders have very peculiar resonances and is the reason why Toyota designed the pitch mount as such. I wouldn’t call the mounts cheap, remember gr Corolla along with the gr Yaris were pet projects of Toyota’s chairman Aido Toyoda. They threw every conceivable obstacle and stress tests at this car. Without addressing the other 2 engine mounts my feeling is that the aftermarket pitch mounts are an unnecessary evil and the long term consequences may not be ideal
I totally understand your concern. But pitch mounts are pretty standard mods for a ton of cars over the decades, including my 2000 MR2. The top two mounts usually deal purely with vibration and damping, not with engine rock, so you might be putting more stress on them, or you might be prolonging their life since they're not dealing with twisting force anymore. Hard for me to say, I'm no engineer. On the topic of cheap, I don't think me saying the mount is "cheap" is necessarily accurate now that I think about it, but it's definitely way too soft and "daily friendly" for a performance car. It impacts the driveability of the car when pushed hard way too much, even on the street.
@@Haloruler64 this is something that’s been debated on for instance STI forums and the going consensus it’s best to replace all mounts. The Brits and Australians have had this platform in the form of the Yaris longer and they replace all 3. I think it’s especially critical with 3 cylinder engines since they are inherently highly imbalanced. Evenly numbered engines can be more forgiving. Only time will tell, on my part not worth the risk of hairline cracks. As for drivability it all boils down to adaptability and developing your skill to the car itself. I know of a guy rallying the GR Corolla competitively and consistently winning. The rules in the class he is competing in stipulates the car has to be 100% stock not a single thing can be changed
@@kengit2 You can do amazing things on a stock car. The stock mount doesn't ruin driving, but it just feels a lot better with an upgraded mount. To me it's a must have for driving feel, even for a daily. I love the Delta X I'm currently running.
With the after market motor mounts do you get more NVH at idle coasting then parked? Like if im rolling at 1-2 MPH occasionally NVH worsens. It's super weird. It's not to the point of being bad or uncomfortable, but it's worse than when the car is at 0 mph. I have the production SXTH motor mount.
Yeah, NVH is usually worst at a certain RPM range. For your car it's likely just at a slightly higher RPM< as the car seems to raise RPM when rolling. Pretty normal. If it's too much for you, you can always try the Delta X mount with a 60A bushing. I'm running the Delta X 70A and it's smoother than the SXTH mount, but every chassis is different.
You probably want a fluid filled engine mount, these engines vibrate alot its a 3 cyl with balance shaft and the balance shaft dosnt remove all the vibrations, for performance you want a 4 cyl with no balance shaft
Fluid filled mounts are used for the sides, the sides are the ones that reduce vibrations the most. Pitch mount is rarely fluid filled (I think Porsche's adaptive mounts are) and stop engine rotation. 4 cylinders are cool and all, but this 3 cylinder is so unique!
Had that 68-70 SXTH, lots of vibrations and made the car sound boomy inside. Especially with the A/C running. Shifting was a lot better than stock I agree, but made NVH unbearable. Switched to Polyflex Black…shifting not as sweet as SXTH, but NVH was negligible.
@@hasonlavajunk9774 that's very weird. I have near 0 NVH. I think because each GR Corolla chassis is hand assembled and hand glued, each one reacts a little different to mounts. Also torquing the bolts on the transmission bracket in a certain order allegedly makes a big difference. Glad you're happy though! Sorry to hear the SXTH mount didn't work out
My NVH with my SXTH is... unpredictable. I would say its never unbearable, but it seems like in certain conditions the vibrations worsen. The worst is when coasting in neutral, mostly at low speeds. Parked at idle it's fine. It's almost like my car is trying to idle lower when it's coasting for some reason lol.
