vmp gen 2

802gt500

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I have a vmp gen 2 that a valve guide went through. It still makes boost, it still spins and makes no weird noises when spinning it by hand or on the engine. It has scratches, a couple small groves in the rotors. I assume the case has scratches as well.

What is this thing worth if anything? Im going gen3r so no need for this unit.

Thanks for any input
 

RedVenom48

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What do you mean "A valve guide went through it?"

Did the engine have a catastrophic failure? Valve guides are what the intake and exhaust valves are running in. Are you thinking of a different valve?
 

RedVenom48

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It's virtually impossible for a valve guide to get inside the supercharger unless someone fed it thrugh the throttle body.
Correct. Thats why I was thinking initially the only way it could have happened as described if a rod snapped, windowed the block and head and sent shrapnel through the intake tube. It would have been way more than just a valve guide going through lol.
 

Catmonkey

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Correct. Thats why I was thinking initially the only way it could have happened as described if a rod snapped, windowed the block and head and sent shrapnel through the intake tube. It would have been way more than just a valve guide going through lol.
Even then, it might have made it to the lower intake, but to get into the supercharger would have entailed real carnage to the case. It's just not feasible.
 

802gt500

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The guide broke off valve ping ponged it to the bypass valve, through the super charger. It can and has happened.
I found valve guide parts in the base of the intake, and In the rotor and some chunks on top of the inter cooler. It also damaged a piston and smacked the combustion chamber a few times.

So back to the original question, anybody have any idea about the value of a damaged gen 2?
 

802gt500

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It is an intake valve guide. Actually 3 of them broke. Cylinder # 2 3 4. All in a row. The car was still running fine no smoke and made boost as it used to.

Anybody else seen these break off and what is the cause?
 

Catmonkey

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Still can't see it happening. Metallic objects are not going to jump up 5" and go through 3 narrow passages in the upper portion of the manifold to the recess for the by-pass and then leap up through the by pass into the plenum. It seems impossible to do what you said it did, so I'll leave it at that.

If something metallic went through the rotors, I would not be willing to take a chance on it, regardless of the price. I think you need to sell it as such, i.e. full knowledge of what you think happened. Now if we're talking something very small, perhaps there's not much damage, but I would make some effort to evaluate that. This piece couldn't have gone further than the intercooler if it went through the rotors, so if you still have it, post it up.

The value of a good used unit might be $1,500, give or take, so I would not expect to even see that. You could remove the rotors from the case and inspect the housing for gouges and get a better look at the rotors and use those pics in a sale. Or send it in for inspection and possible repair, but that just sounds like more trouble than it's worth. But a tear down would reveal just what you have.
 

69b302

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If your engine ever had the cams swapped, an improper compression tool/or mechanic, can tweak valves and lead to the broken guides.
 

Papaw

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OK, I'll take a shot at this. So the bottom part of the valve guide protrudes into the intake port. A piece of it breaks off. It then has to "reverse flow" back into the intake manifold. Because of the shape of the intake port the piece would be directed to the area below the intercooler. From there it would have to defy gravity by being bounced up through the bypass opening and then into the 'charger.

Clear as mud?
 

Catmonkey

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OK, I'll take a shot at this. So the bottom part of the valve guide protrudes into the intake port. A piece of it breaks off. It then has to "reverse flow" back into the intake manifold. Because of the shape of the intake port the piece would be directed to the area below the intercooler. From there it would have to defy gravity by being bounced up through the bypass opening and then into the 'charger.

Clear as mud?
Essentially yes. Here's a disassembled intake that's upside down. The other picture is the top of the manifold. The circled area is the the only possible passage into the supercharger from the cylinder.

intake usd.jpg

Intake top.jpg

Anything is possible, but that's a pretty fantastic feat. If the piece was small enough and the turbulence fast enough, I guess it's possible. That's why I'd like to see a pic of the piece that OP is talking about. Knowing what little of the guide protrudes below the port, it might be pretty small fragment after all and not what I envisioned from the outset.
 

Handlebar Moustache

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I'd say put it up on Ebay (with an honest description) for 100 bucks with no reserve and let the market decide. IMO it is worth core value (assuming you can have it rebuilt). i don't see any other real market for it other than as a cool-looking wall ornament in a man cave.
 

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