Hey guys, I am wondering who has delrin engine, tranny, and/or diff mounts. I'm wondering how stiff these are and if its liveable to have a street car with these? I'm thinking about getting them for my weekend car.

 

I hear they're livable, but then some people think an unsprung 4 puck clutch is livable as a dd. However, the delrin bushings should perform a little better than stock while keeping the ride smoother than if you use solid aluminum or steel mounts. I don't know from personal experience, but it's what I'm going to do. At least hopefully delrin won't tear as easily as the stock pieces.

 

I hope you don't every have friends riding in that car, for their sakes.

I would only use Delrin or UHMW bushings on my track car, the car I have to drive the least.

 

You need better friends. Besides, everyone knows that women like it rough. That's why we have stiff coilovers and race puck clutches. Mmmmhmmmm.

 

I personally hate anything over 3/2 for my street driven cars, there should be no reason why people run unsprung clutches in daily driven cars. I have friends who do and drive through Midtown Manhattan traffic. I just laught and shake my head when they bitch.

Up to you, whatever your preference is, but if you want delrin, be prepared to know that even a loud radio may not overpower the vibrations.

 

Its not that bad. I have solid diff mounts and poly suspension and subframe mounts. The only thing loud about it is when you are going down a hill because the rear end screams (pinion needs reset) like a dogbox. Other than that, its worth it not to break things because the solid diff mounts and suspension mounts help tremendously with wheel hop.
Just my two cents.


dpf22

 

oops, double post

 

If you want stiff yet soft for MOST people, Get some new Poly-urethane bushings. Urethane is a material that's harder than rubber, stronger, and generally better all around. Anything rubber can generally be replaced by urethane (except tyres). Just look at Bowling *****...

 

Thanks for hte input guys. I guess it comes down to the driver and their passengers. Some people prefer a better ride, while others couild care less , and rather have their driveline not vibrate as much.

Where are you guys buying your delrin bushings? MMR direct is gone now and everywhere else I see costs an arma nd a leg. If you guys wait, my buddy is going to start carrying these bushigns and claims to sell them significantly cheaper than the other people. Anyone interested?

 

a trick us 240sx guys do is fill the stock mounts with polyeurathane fill from your local hardware store.. works great to stiffen up the motor mounts.

I did that way to my tranny mount, and had solid aluminum motor mounts.. Driving was great.. made noise when idle.. but the feel from driving it was awesome with minimal drivetrain lose. Didnt carea bout noise in that car since my nismo 2 way lsd made alot of noise too. If i could do it again tho i probably wouldnt have gone with teh solid motor mounts, go with something a little more forgiving on sound. And ive gone on dates etc in that car, people dont mind if your car is all modified/bodykit/rims, they tend to understand that comes with the territory.

Another trick is hockey pucks. Hotrodders have been doin that for ages.

 

I guess mine probably aren't delrin, I ordered Racing Beat's competition set, as they had the lowest price out of multiple places and I'll be happy as long as they're stronger and stiffer than stock.

 

Racing beat has bushings?

AFAIK I've only seen them sell stiffer rubber engine and diff mounts.

 

They have motor mounts. I don't know if they have suspension bushings. Sorry for the confusion.

 

Just a quick question when installing Delrin bushings do you freeze them prior to installation? (Rear Subframe bushings are being replaced with them)

 

A good option is the Mazda Comp mounts. They're stiffer than stock, but there's not really any NVH penalty.

I would not even consider solid mounts in a street driven car. Delrin has little to no give in it, it won't be much better than aluminum.

 

I've driven my car with solid delrin engine and tranny mounts for a good while.

I went back to stock transmounts due to the vibration transmission. It wasn't *too* bad at first, but I began to notice increasingly loud noise and harshness as time went on.

After stock tranny mounts the car drives like a BMW in comparison to before. I still run solid engine mounts and the car doesn't vibrate at idle or anything like that - its just the tranny mounts that take it too far.

As mentioned a great option is the Mazda comp mounts, but I feel solid delrin engine mounts don't play that much of a role so long as the tranny has a little wiggle room througuh either stock, or stiff stock (mazdacomp) mounts.

 

I have MazdaComp engine mounts. I'm going to be installing Delrin Rear Subframe bushings. It's not supposed to move... at least that's my impression, so the vibrations may be transmitted through the subframe, but having the stock mounts on both the tranny and diff will probably absorb more of the vibrations. So, do you freeze them to shrink the bushings to fight, or do I just press them in with gobs and gobs of lube?

 

I dont think the delrin will shrink when cold like metal. You can also heat the subframe or whatever your pressing it into.

 

MMR is still around.

I just bought some suspension bushings form them 2 weeks ago.


I'm putting them in my drift car so noise isn't really an issue. Although, I'd take noise over broken diff mounts any day.

A local guy here just installed mmr engine and tranny mounts and I think they felt great.
sexy looking stuff.






I used a rubber mallet and some lithium grease to get them in.

 

Hmmm, seems like a nice way to do things then. lol.

 

I installed the Mazda Competition mounts with my rebuild. Everything is very crisp, but not harsh. Although, when I pulled the motor I found I had a completely torn motor mount for who knows how long, so of course there was improvement *shrugs* I'm happy with the Mazda mounts. They can be a pain to install properly though, but as it was my first build I probably didn't do it the easiest way possible.

 

So the rear diff and subframe bushings did not come with a metal sleeve or anything?

How well do the front lca bushings fit? That one bushing is a circle with a small flat area in it.

 

oooh, that's another good point.

ANY engine I've pulled has had blown engine mounts. Including Comp mounts.

I'd find it hard to pull a motor and discover a torn solid mount..

 

No, They are pure delrin. No need for a sleeve on that one. It doesn't flex like the others would.

The front control arms went in nice and snug. It took some healthy hits from the rubber mallet and a solid piece of wood to get them all the way in. Or tightening them into it via a long bolt and some washers/nuts.

 

A much better design would be to have a metal sleeve so that the mounting studs aren't in direct contact with the delrin.