catch2otwo

Thats the logic that eludes me. So let me get this straight, your going to stick a cam in your car but are afraid of motor mounts adding vibes? If your so scared of vibration and the lack of civility why stick a cam in the car at all?

Chadlee2KZ

iTrader: (9)

Mine got better the more I drove them. Or I got used to the added vibrations.. I am doing a H/C/I install any weekend I get the time so that will be a real test.

FuzzyLog1c

iTrader: (4)

A cam doesn't necessarily add a ton of vibration, by itself. If you jumped straight from a stock CTS-V into my car, you'd be able to feel the difference, but it the vibration is so slight that it won't rattle anything in the cup holders or cause a disturbance in a glass of water. There's an enormously wide gamut of mount hardness between the stock mounts (which you can bend in your hands) and solid motor mounts (which basically create a structure borne sound short between the motor and the frame). I, along with everyone else here (as best I can tell), are willing to accept additional vibration. But we all fear the kind of vibration that upsets our ability to comfortably idle and hold a conversation with our girlfriends or wives without the vibration putting in a couple of words edgewise.

What I need to hear on the UMI mounts is a review from someone I trust with a big cam and high acoustic and ride quality standards.

04Vguy

iTrader: (3)

just ordered my umi mounts for my new 408 going in. we shall see how they handle big boy power in our cars. ill let ya know about the vibes.

catch2otwo

Should be about as thorough of a test as one could ask for.

04Vguy

iTrader: (3)

im sure they will do fine on just motor wondering how they are gunna hold up to the nitrous though. we shall see. i have faith!! haha

mitchntx

iTrader: (14)

Not sure if I was just called a liar or an idiot.

FuzzyLog1c

iTrader: (4)

If he's running the stock cam, then it's not a good test.


I don't even know what you're talking about, or why you quoted me.

catch2otwo

Who builds a motor and sticks a baby cam back in it?

RADEoN

iTrader: (12)

Someone who hates the vibrations and headaches of a big cam. I have a forged 408 with a 248/254 cam with a 112LSA, and with these damn UMI mounts it feels like the car is gonna vibrate apart when it dips below 1,000 RPM. When I'm cruising at highway speeds, the vibrations are not noticeable. When I'm idling, my interior panels make some noise, but it's not really killing me, but I could absolutely see why it would frustrate someone.

98cobra had a massive cam in his 408, and he ended up taking it out for something a little smaller, and again, I definitely see why.

07CTS-V/PISNUOFF has a 418 LS3 with a 242/252 (I believe) cam... but it's on stock mounts, and honestly, his car feels almost stock at idle, aside from the exhaust note booming out of the back.

FuzzyLog1c

iTrader: (4)

Sometimes I wonder if I should stop here and save up for a 427 instead of saving up for a TVS2300. Then I think, I should stop here and start saving up for a V2. I wish I had an extra $10,000 laying around.

RADEoN

iTrader: (12)

you're this deep in it anyway, might as well follow your dreams.

DACTARI

iTrader: (1)

My tuner is recommending a 228/234 cam, .6ish lift on 111 LSA. I was at his shop today for some tweaking on my tune, and there was a customer there with an LS1 F-body that had that cam and damn, that thing was vibrating in the engine bay like a shaken baby. But he had soft mounts. With my UMI mounts, it would be shaking the whole car rather than jumping around in the bay,

However, as my tuner puts it, the weight of the whole car will dampen the vibrations, so that rather than a rumble, the entire car will rock.

Would like to hear more from guys with UMI mounts and lopey cams.

04Vguy

iTrader: (3)

thats that 111 lsa get that bitch cut on a 112 or 113 and itll calm down a little

04Vguy

iTrader: (3)

im gunna be runnin a 254/262 630/630 on a 114+4 in my 408. should be interesting.