what are the advantages and disadvantages of these? besides weight.

 

I suggest going with poly motor mounts unless your building a all out race car.

 

Im not happy with my poly motor mounts (will be getting rid of them)......they still let the engine torque up and smack close fit exhaust systems (my x-pipe) on the floor


I'm going to motor plates soon

 

You can fabricate a motor torque strap to keep it from moving around..nothing to it.

 

Solid mounts aren't a good idea on the street. You stand a good chance of cracking the block around where they bolt in due to the torque and bumpy roads. i don't advise it unless its a track only car. Poly mounts should work just fine. IMO

 

Madman told me this about using solid mounts that bolt in the factory motor mount location. He says they found that the stress (on high HP motors) on the side of the block in that small area was distorting the case and could cause block cracking.

His feeling (and mine) is that if you are going to go with a solid mouting of a motor, it needs to be a plate mount (front and mid) which will spread the load over the entire front and rear of the block thus preventing damage.

 

Exactly why i went with plates. 2 bent mounts and 2 cracked cylinder liners, no more of that

 

hey...any update on the next set?

 

Would the solid motor mounts(Spohn) be ok on an iron block?

 

now you guys have me worried! I have madman solid mount, should I switch over to poly and TQ strap it? I don't wanna crack my block!

 

well Madman told me they DO NOT make those anymore because they where having problems with blocks cracking

 

Street car = poly mounts, and a strap if you think you need it.

IMO: If an exhaust is still hitting after poly motor mounts.. the exhaust is the problem, not the mounts.

 

HOw bad is the vibration in the car with poly mounts?

 

One of the other things to consider is that for clutch swaps solid mounts make it a bit harder to get to those top bolts as the motor doesn't lean back like it does with stock mounts.

 

Nice to see this post. Ya would think Madman would have said something to his customers who are using his product. I would love nothing more than to crack a 10k dollar solid roller motor over some POS part known to cause problems like this......

 

the exhaust is the problem......but with a car that must go over speed bumps (huge MOTHER F*er that look like small mountains) and is lowered ~1.5", the exhaust MUST be as close to the body as possible (actually want it closer than it is)


seems basically stock......though if you put the hood up, you can watch the tip (the front up in the air) move a slight bit...

I'm looking forward to the shake, rattle, and roll of the plate mounts

 

People who have MAdman solids would do well to CALL him and ask his feelings on their aplication. He said at low to mid power levels its not really a problem (still not a wonderful idea) but cars that are makeing "big HP numbers" could be in trouble

 

This discussion about solid motor mounts and LS1 motors AND my comments are being taken out of context. I have ONE engine builder that is having problems with ring seal. He is blaming my mounts. I havent proven or disproven his claims. I have numerous mounts out in cars that actually race and I havent had any problems. I am not selling any mounts right now till I can see what the problem this engine builder is having.

Hopefully this will explain my position.

 

Thanx for chiming in... I am not a "bigdog", but I think I make enough power to crack a block if indeed there is a problem. Shoot me a PM if you find out any info that could be beneficial to me...

Ron

 

.....well that changes some things. From the way you told me on the phone, it seemed like you were against solid mounts.