mpg mikes powrevalvez

[TimTona]

i have a spare set of heads im planning on rebuilding and machining and im contemplating buying a set of mpg mikes intake powrevalvez has anyone else bought these? do they work? and are they reliable?

[Ondonti]

have no idea what you are talking about

[joker5k1]

I don't know about the 3.0, but I had Mike do a head for me and he added those. Unfortunately the swap hasn't happened(school + relocating in a few weeks for a new job) But when I get to it I'll have to let you know. I've heard good things about them. Including the theory and first hand proof from Mike himself.

-Joe

[Boogieman142]

so what do these power valves do?

[looneytuner]

I think you are thinking of Powerlynz. They are gooves in the head intake area. Read his site about them.

[joker5k1]

I stand corrected, I do not have the Powre Valvz, rather I have the Powerlynz on my intake valves. Again I have no idea how well they work as I don't have the resources to perform the hear swap just yet.

-Joe

[TimTona]

no he said he is also making powrevalvez a 2 piece intake valve that snaps shut when needed creating no valve overlap ie exhaust gasses reentering the intake manifold

[Ondonti]

someone made a post about those on the 3si forums.
I havent seen any evidence yet of how great they are.

[TimTona]

i wish somebody has tried them the theory behind them makes sense but i wanna know FOR SURE before i spend $300 plus having to potentiallyt tearing the heads back off once is enough

[c2xejk]

Just to make sure everybody is on the same page, here is a link to the "powre valvz"

Powre Haus » Powre Valvz

The traditional way to deal with reversion is properly port the intake port cross-sectional area (CSA) so that velocity is 250-300fps. The problem is that you the intake port does not dynamically change it's CSA. So you have to pick a target RPM and hp level.

Reading the claims I would note that he does not talk about "peak hp" gains, he is talking about off peak gains... I didn't see anything where he talked about what it does to peak hp.

Can anybody find any back-to-back dyne testing of the these devices?

[TimTona]

hmm so ur saying this is a better torque improver than horsepower?

[c2xejk]

I have no idea if it even works... As I said, I have yet to find any real proof.

I would note that if I understand this thing, I would expect extra noise from the engine as the "flapper" moves back and forth. I believe that it is also likely that the engine will become an interference engine.

Also, the valve shape has been radically altered. I do not know how that will effect the intake port flow.

[Ondonti]

Those valves also look to be much heavier. Yay for lifter collapse!
I have never seen proof of these working and it seems that there are a lot of failures that could happen.

Not a risk I would take and not a risk that even seems to make sense for a torque happy motor.
The ONLY reason i could see using these is if they would help a big cam'd motor pass emissions...

[c2xejk]

I just finished reading about a Pro-stock drag team that built reed valves into the intake to attempt to eliminate/reduce reversion. Sounds very similar to a Powrevalvez does... Didn't work. Basically dampening the reversion damped the much bigger pulse in the other direction that "supercharges" the port filling...

That said, you might get a gain on a completely stock engine, but that is likely because the port is screwed up and is in need of some good port work... ie. it would be like putting a band-aid on a gushing wound...

[TimTona]

i guess there is no "easy horsepower" rite?