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YOUR RESEARCHEngine Mount Upgrade - Benefit(s)?
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Replace solid rubber bushing
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Raises the engine since the bladder of the original mounts is changed for a solid rubber bushing.
Leading evidence: 'Replace solid rubber bushing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace solid rubber bushing' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Looks like you track your car. Definitely a worthwhile mod. The slop/flex you feel when cornering and braking at the track will disappear with RS mounts or any semi-solid mount. The pros include, more accurate shifting feel, minimal engine movement under throttle allowing all the power to be transmitted to the chassis, compliments the suspension upgrades you've done, and the car will feel solid and screwed together. Easy DIY mod with noticeable characteristics that will transform the feel of he car.
The cons.... Raises the engine since the bladder of the original mounts is changed for a solid rubber bushing. No big deal if you're car is lowered. Also, sharp expansion joints will be very noticeable compared to the dampening you get with oe mounts.
For a track guy, the semi-solid mounts are a no brainer. For the casual street driver i wouldn't recommend them.
I think you meant to say: "Thanks for being an a$$hole..." My remark wasn't the most helpful, I know.
Cliffs Notes from couple other threads on this:
Improved Shifting
More solid cornering
Better launching
Better feel in threshold braking
It kinda feels like you got new suspension back there would be the way I would describe it.
This is based on the aftermarket Corteco branded mounts which appear to be slightly stiffer than OEM. I wouldn't bother just swapping to new OEM mounts unless yours are shot(leaking or sagging).
Poly mounts would introduce slightly more NVH but as mentioned above, would offer an even better feel, albeit for more track focused performance.
You're Welcome.
Im on the market for motor mounts as we speak, i read that the oem turbo mounts are a little stiffer, is that true?
also Im looking to stiffen things a bit, i dont track the car but love performance, etc.
do semi solid mounts add too much NHV or not?
thanks
Noise - very little if any
Harshness - some
Vibration - very little
Never tried turbos. From the looks of them I don't think you could feel a noticeable difference. RS on the other hand gives definite stiffer ride.
thanks guys, that answers my question,
now which of the semisolid mounts do you recomend and where can i get them at the best price and customer service!
Im planing of ordering them today,
thanks
yep...dealer just removed the old mounts with 109,500 miles on them and i replaced them with the turbo mount...not much at all...didn't even raise the driver's side exhaust tip back up....guess i'll have them adjust it up for me...the old mounts were 1/2 longer than the new one though...i got that and the trans. serviced (new fliud) at the same time...it does shift better!
How much, really, can the engine be lifted/sitting higher with semi solid mounts? With new regular turbo mounts there is barely 1/2" between the engine and the insulation in the compartment? Why would they be made shorter? I would think the semis just sit at the same location. Even with the homemade semis you would have to go to some effort to relocate the mounting pin to get it back to the right height. Like you said, far better to keep the engine in the car, not under it, and lower the whole car. MMs are a wear and age item, on any car. We just dont bother to replace them, because its a part of the old car feel. On any car, if you replace all the 10-13 year old rubber parts in the suspension and MMs the whole car feels and handles far more like new. Why did the OP ask whats the point? Its normal maintenance. The real question should be why does he track a car with lowering springs and original valving instead of installing coilovers? It can only be cost, as the handling difference is amazing. Same answer on MMs, only reason not to do it, is cost.
Positive comments scattered through the threads about the FunctionFirst semisolids. Just placed an order.
I'll pass along any difference I may/may not experience. My car is purely street, and I'm just not that perceptive, so the
"I notice a little harshness in the 3600-4400 RPM band, and slight
skittishness when rounding the banked oval at 130"
reviews won't be coming from me.
Valkuri,
Interested to hear how the install goes for you.
I need to do this as well--anyone in the San Antonio area that has done this before and would be willing to assist? Willing to pay in adult beverages of your choice.
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Current:
-2002 Arctic Silver/Black Leather, Manual 996TT (33,XXX miles)
-2002 4Runner (DD w/ 200,000+ miles, "the tank")
In the History Books:
-2000 Boxster
-1999 M3 (w/ Active Autowerke Stg 1 Supercharger kit, other mods)
-2004 S2000
-1997 Integra
There is no benefit it's all a lie. Marketing gimmick to get you to buy something and take you air box out. When it's done you convince yourself the car is shifting and handling better but it's not true.
In the process of debating the RSS mounts vs. function first and placing an order just in case I am wrong!
haha your wrong amigo... night and day difference between fluid filled and semi solid mounts. The RSS kit is nice... but I have the Porsche RS mounts for 5 years. If you don't track the car don't install them. Stiffens the rear end up considerably....
I'm ready to change mine out a second time (140K) and looking at OEM as I do occasional road trips and drive daily, no track. RSS sounds fun if it's they're not too aggressive. Looking to tune the car to get more fun out the 3 to 4 K range.
