question on polly motor mounts

[UNCLE CRACKER]

I am getting ready to drop in a new motor in my truck. the motor is a 383 around 425hp and 425tq. my question is do you think it is better to run the polly mounts VS. the rubber? I have heard of people breaking tranny housings and I was wondering if the polly bushing help this problem? also do they make a big difference in the vibration you feel through the motor?
thanks

 

[Stephen]

You definitely feel more vibration, that's just the nature of the beast, it's hard to have a stiffer mount without it being, well, stiffer.

As for breakage, I'm a big fan of having the motor mounts at least as stiff as if not stiffer than the transfer case mounts so putting the HD poly mounts in would be a solid upgrade, at least in my opinion. This way the motor's not trying to torque against the t-case mounts. I'm also the guy that sells the stuff, but the reasons are sound so you know I'm not blowing smoke up your kiester.

Hope this helps /forums/images/graemlins/thumb.gif

 

[UNCLE CRACKER]

so in your opinion you think this helps against tranny case breakage

 

[Stephen]

Yup. The idea is the motor can't move as much so it can't twist against the t-case mounts and break the trans housing.

 

[UNCLE CRACKER]

I guess you will be getting a call from me so i can order those mounts.

 

[Alaska Offroad]

Upgrading to ORD Poly bushings on my engine mounts is one of the best mods I have ever done, and I have done LOTS of "extreme" mods. IMHO the increase in vibes is barely noticable, and the benefits of engine controll is more than worth it.

 

[Blazinaire]

Not to hijack a thread, but....
Stephen, I sent you a PM a while ago regarding raised motor mounts. No answer so I figured I'd ask you here: Do you make your poly motor mounts in a raised version? I need 1/2-1'' to get the motor to clear my crossmember and to keep the mechanical fan off the front crossmember since I raised the t-case a bit. Also, what would pricing be on such an item?

 

[Stephen]

We don't have a raised version but I was able to build some spacers for my crewcab that worked pretty good. They raised the motor about 1/2". They're cut out of 3/4" plate. My turbo exhaust manifold was hitting the frame so I picked it up a little.
I don't know if we're going to build anything to raise the motors, the spacer plate is the leading candidate right now.

 

[nvrenuf]

Just to be sure, does your motor mount kit come with both the frame and block brackets (I see the block bracket in your picture).

Thanks!

 

[Stephen]

Yup, the comp style mounts come with both sides. Our HD daystar mounts are just the frame side and are a little cheaper.