Supporting engine by the supercharger

[Unholy707]

I have the mopar tool to lift the supercharger off via an engine hoist. I’m wondering if the engine can be supported by the supercharger. Thoughts? Not lifting the engine and transmission out of the car, but supporting it for removing engine mounts

 

[BULL]

I have the mopar tool to lift the supercharger off via an engine hoist. I’m wondering if the engine can be supported by the supercharger. Thoughts? Not lifting the engine and transmission out of the car, but supporting it for removing engine mounts

I could determine the theoretical clamp load of the bolts, which would then in turn answer the question, but it sounds less than ideal even if the answer turns out positive.

My .25 says no.

 

[Linda's Hell Cat]

I wouldn't put that kind of stress on the SC. It's like not lifting the car using the dif. But some do it anyway.

 

[Unholy707]

The tool clamps onto the sides of the supercharger, so theoretically most of the load would be on the bolts to the head

 

[Unholy707]

My thought is engine plates for carbureted intake manifolds are used, putting the load on the intake manifold/heads

 

[1971demon]

I could determine the theoretical clamp load of the bolts, which would then in turn answer the question, but it sounds less than ideal even if the answer turns out positive.

My .25 says no.

Okay...professor...do the math..this I wanna see...(the whole equation)...the outcome notwithstanding.....I agree I would never try it...

 

[MJS73]

The tool clamps onto the sides of the supercharger, so theoretically most of the load would be on the bolts to the head

My rule of thumb is that any time you have to use the word “theoretically” it’s probably a no.

 

[16GoManGoHC2]

NO WAY!! I wouldn’t!!!

 

[1971demon]

My rule of thumb is that any time you have to use the word “theoretically” it’s probably a no.

My money says he does it anyway

 

[45-70govt]

Almost as bad of an idea as a floor jack on the oil pan. I see the temptation, but I would skip that thought.

 

[covidcommander]

Used to jack up a motor with wood under the balancer to change motor mounts

 

[SilverBillet]

Don’t forget to loosen the trans crossmember before you jack up the engine??

 

[1971demon]

Almost as bad of an idea as a floor jack on the oil pan. I see the temptation, but I would skip that thought.

Justin...the guy has pet alligators in his garage...save yer breath

 

[MJS73]

My money says he does it anyway

I’m down to watch.

 

[1971demon]

I’m down to watch.

I’m down to watch.

Voyeur.

 

[BULL]

Okay...professor...do the math..this I wanna see...(the whole equation)...the outcome notwithstanding.....I agree I would never try it...

This is ONLY an exercise in BAD academics. DO NOT USE THIS FOR DETERMINING THE VIABILITY OF ACTUALLY LIFTING THE ENGINE ASSY BY THE S/C.

I strongly do NOT recommend this. If Dodge does, that's their literal business, I do not know all of the factors involved, they do.

ASSUMPTIONS - AND BAD ONES AT THAT.

• That the bolt is stronger than the pull-out force of the threads (it most certainly is, but...)
• 10mm thread depth
• 8mm bolt
• threads in optimal condition, both thread percentage (75%) and overall condition.
• 270Mpa aluminum material strength (this is one of the bigger assumptions)
• thread shear efficiency factor of .577

270Mpa * .577 * 8mm * pi * 10mm = ~39,134N

39,000N / 9.8 = ~3980kg

3980kg * 2.205kg/lb = 8775lbs pullout (which is the better approach than clamp load I stated originally)

So, academically, the pullout force, per bolt is 8775lbs. BUT this is a grotesquely bad way of thinking about the system of lifting the engine assy by the the S/C.

Again, if Dodge has blessed this method, that's their deal.


.02, and a bad .02 at that!



(Did I qualify that post enough times? I did so not so much for this thread now, but in the future when somebody else stumbles onto this thread and takes it out of context.)

 

[Unholy707]

This is ONLY an exercise in BAD academics. DO NOT USE THIS FOR DETERMINING THE VIABILITY OF ACTUALLY LIFTING THE ENGINE ASSY BY THE S/C.

I strongly do NOT recommend this. If Dodge does, that's their literal business, I do not know all of the factors involved, they do.

ASSUMPTIONS - AND BAD ONES AT THAT.

• That the bolt is stronger than the pull-out force of the threads (it most certainly is, but...)
• 10mm thread depth
• 8mm bolt
• threads in optimal condition, both thread percentage (75%) and overall condition.
• 270Mpa aluminum material strength (this is one of the bigger assumptions)
• thread shear efficiency factor of .577

270Mpa * .577 * 8mm * pi * 10mm = ~39,134N

39,000N / 9.8 = ~3980kg

3980kg * 2.205kg/lb = 8775lbs pullout (which is the better approach than clamp load I stated originally)

So, academically, the pullout force, per bolt is 8775lbs. BUT this is a grotesquely bad way of thinking about the system of lifting the engine assy by the the S/C.

Again, if Dodge has blessed this method, that's their deal.


.02, and a bad .02 at that!



(Did I qualify that post enough times? I did so not so much for this thread now, but in the future when somebody else stumbles onto this thread and takes it out of context.)

So you’re saying there’s a chance?

 

[BULL]

Now I want to set up a piece of scrap aluminum with a 8mm bolt and test it on my shop press to see what the actual fail point is...

 

[Unholy707]

This is what I have. They say engine supercharger, but what they really mean is engine AND supercharger

 

[Unholy707]

Now I want to set up a piece of scrap aluminum with a 8mm bolt and test it on my shop press to see what the actual fail point is...

For science!