Prophet7000

Weird they've got cut outs on the bottom to fit the aluminum mount. I didn't notice this on their pictures online. Are you worried that basically replacing the center of the poly with an aluminum section is going to lead to more vibration?

IRPerformance

iTrader: (41)

Yep. I get much better results by milling them.

tom94RX-7

iTrader: (5)

I never actually thought about it like that, but that's a good point, less poly could mean more vibration. oh well, we'll see. Either way I was trying to save money and these were the most affordable option (besides making my own) and will work much better than my broken stock mounts so it will still be better than before.

Banham

The durameter 90 poly is much softer to the touch but still hard enough to keep the engine from moving much.
I have the Himni ones now mounted but I have to finish mounting the diff, axles and exhaust before test driving them. I might reuse the discs of poly 90 that I had on the underside to get some "rebound" damping.

Banham

The strange thing is that the period before the trans bearings going bad I was triving like a grandmother because I had just finished my single turbo build and not gotten it tuned yet. Probably I was never over 100km/h (60 miles/h). The trans fluid was new.

Probably I had the driveline misaligned somehow. But to be on the safe side I bought a set of new mounts.

CrispyRX7

iTrader: (139)

Good stuff...thanks for the writeup!
crispy

tom94RX-7

iTrader: (5)

I got my car running again, with the himni racing poly motor mounts, I am happy with them, not dissatisfied in anyway. There is very minimal vibration at idle, barely noticeable and not bad at all, my girlfriend didnt notice anything different haha, but she is cool and doesnt mind any of the loud noises or anything like that. There is some extra vibration around 1800 rpms but only noticeable when reving in neutral and I think its cool and not bad, nothing feels bad when driving, its nice having the new mounts compared to the broken stock mounts. I said I would report back about these, as talked about on the first page.

Prophet7000

Thanks for the report Tom!

Banham

That sounds good. I look forward to trying them too, but have been traveling too much at work to get the car on the road. I have hopes for this weekend though

ttmott

iTrader: (1)

Driver's side broken in mine. Decided to try the poly's.
A couple of things I did different:

1. Used 60A durometer polyurethane; I think the softer rubber will absorb vibration better.
2. Machined the aluminum motor mount flat and welded a bolting tab on it.
3. I cut the poly with an aluminum chop saw - worked great and cut square.
4. Will be able to reuse the heat shield above the right one.

Prophet7000

The only thing I would consider changing with that setup would be to put a 3" washers between the top wafers and the mounts. The mounts (esp the aluminum one) aren't completely flat where the mount hits the poly so the pressure won't be even and could decrease the service life of the top wafers.

Yeah I considered putting poly wafers on top of the motor mounts too, but decided to just go with ones under the subframe since they accomplish the same thing. Putting them on top does avoid the problem of decreased clearance under the car though. Which is a very good thing. I was lazy and didn't cut my bolts down right after installation and one of them bottomed out on the tracks over the pit at Jiffy Lube when I brought it in for inspection. Bent the crap out of the bolt and had to replace it.

ttmott

iTrader: (1)

[QUOTE=Prophet7000;9660092]The only thing I would consider changing with that setup would be to put a 3" washers between the top wafers and the mounts. The mounts (esp the aluminum one) aren't completely flat where the mount hits the poly so the pressure won't be even and could decrease the service life of the top wafers.
QUOTE]

You're right I thought of that also and made up some 12 ga stainless sheetmetal ones this morning (one above and one below the mounts). Engine going in today...

Prophet7000

Great minds think alike I suppose. Good job.

GoodfellaFD3S

iTrader: (213)

And you were bringing your FD to jiffy lube because........

Prophet7000

In North Carolina you can get your car inspected at all sorts of random places. I bring mine to Jiffy Lube because they always check the box that says "Catalytic Converter" even though my car has a straight through 3" exhaust. It's one of the times that Jiffy Lube is a great place to go because of the fact that they suck at their jobs!

GoodfellaFD3S

iTrader: (213)

I was just busting *****..... just make sure they don't accidentally leave your oil drain plug loose when they're under there

Prophet7000

Yeah they get my $13 a year for inspection, but I don't let them do anything else. Plus they move quick because I think they get weirded out by me standing there pressed against the glass unblinkingly staring at them.

Andrew

iTrader: (1)

I'm thinking about using these universal mounts from Energy Suspension to build new mounts. Part #2.1102. Should just have to build a spacer with a stud out the center and bolt it up. I've never really liked the idea of a bolt all the way through the mount to the chassis. I like the interlocking design of these better.

The best part is they're only $23.40 for what looks like a pair from Amazon of all places.



http://www.energysuspension.com/univ...on-mounts.html
http://www.amazon.com/Energy-Suspens.../dp/B000CN56UO

Prophet7000

Let us know how they work out Andrew!

XLR8

iTrader: (52)

I really like my IR Performance mounts. Excellent quality & performance. I also enjoy supporting the rotary community, & its vendors. Money well spent

XLR8

iTrader: (52)

True story... Killed my uncles Jeep engine. Rubber ring stuck from last filter. Of course they didn't clean and inspect. They screwed a new one on and called it good. 5 mile down the road. Oil light comes on, followed by a rod going through the block.

I won't even let the alignment guys pull my car in. I will always do my own work. If there is a specialty job that needs done. I will watch them carefully. If I can't be present while it's being performed, I politely explain that I will take my business elsewhere.....

IRPerformance

iTrader: (41)

Thanks. Glad you are enjoying them.

Prophet7000

I like supporting rotary vendors too, just not when it's double the price and involves so little prep work. I mean if you've got the money to spend by all means spend it, but I'm on a budget (stupid grad school). That hundred bucks went to purchasing steering rack parts to freshen up my newly converted manual rack. mmmm.....road feel.

Supernaut

iTrader: (83)

Its great that a person like you can do this on their own. The problem is that alot of people don't have the resources you do and research costs money. Your story is full of win and success but I'm sure others who have tried have failed. Its cool that you can do this on your own though. I'd love to be able to work on my car some day.