ProCharger Dyno Testing. What's It Going To Make?

[pokeytemplar]

Haven't found a particular RPM where the whine is especially loud, but I've only driven it for an hour or so.

The race bypass noise you're talking about is certainly noticeable. Matter of fact, if I'm correct, it really shouldn't "chichichi". It should just "cshhhh". That rhythmic sound I believe is compressor surge. I'm considering sending my charge pipe back to Justin to have another bypass valve added for more efficient discharge of the excess pressure. The F2 just moves so damned much air!

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The sound I get is air bouncing back after hitting the throttle body. I have the lowly D1 and at idle it is ridiculous how much air it moved. Even with the bypass I would read ~4psi (needle bouncing) on the intake side of the TB with the throttle closed (at idle). The only time I get the rythmic sound was when I had the engine up near redline and closed the throttle slowing back down. At that point the bypass can't keep up with the amount of air trying to flow through it. Moving the bypass past my intercooler and near the intake lessened the effect though since the air had a shorter bounce to make before escaping. Is that the best place to put it? I felt so since the air kept moving through most of the system keeping initeria up once the throttle opened again. The downside would be that hot air continues to move through the intercooler even while not on boost. With air to air there is so much excess cooling air moving through the intercooler I felt it wouldn't matter.

I gotta look back at you pics to see where you ended up putting your bypass/blowoff.

 

[Ram From Hell]

The sound I get is air bouncing back after hitting the throttle body. I have the lowly D1 and at idle it is ridiculous how much air it moved. Even with the bypass I would read ~4psi (needle bouncing) on the intake side of the TB with the throttle closed (at idle). The only time I get the rythmic sound was when I had the engine up near redline and closed the throttle slowing back down. At that point the bypass can't keep up with the amount of air trying to flow through it. Moving the bypass past my intercooler and near the intake lessened the effect though since the air had a shorter bounce to make before escaping. Is that the best place to put it? I felt so since the air kept moving through most of the system keeping initeria up once the throttle opened again. The downside would be that hot air continues to move through the intercooler even while not on boost. With air to air there is so much excess cooling air moving through the intercooler I felt it wouldn't matter.

I gotta look back at you pics to see where you ended up putting your bypass/blowoff.

I'm not so sure the air is just "bouncing" per-se, but rather a surging effect from produced by the compressor as it continues to provide boost after the throttle is closed. Either way you say it, we're describing the same issue.

The existing bypass valve is just ahead of the throttle body on the Procharger kit. I'm thinking that adding one near the compressor ahead of the intercooler might be sensible, otherwise I'd just add another somewhere on the same charge pipe. I have yet to ask Justin his opinion on the matter.

 

[JMB Justin]

I contacted Procharger on this after hearing the surging sound during cruising, they said a 50mm BOV like The Tial's I use is more than enough, and confirmed it with another Rep that was heavily experienced with this blower. I thought that maybe more was needed as well, but they didnt see an issue with it.
Justin

 

[Ram From Hell]

I contacted Procharger on this after hearing the surging sound during cruising, they said a 50mm BOV like The Tial's I use is more than enough, and confirmed it with another Rep that was heavily experienced with this blower. I thought that maybe more was needed as well, but they didnt see an issue with it.
Justin

Thanks for doing the footwork, Justin. Looks like I can leave it as-is.

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[SrtBrad]

Hows the truck doing?

 

[Yellow venom]

Any good vids of it Eric?

 

[faslane505]

Any good vids of it Eric?

what he said

 

[faslane505]

what ever happened with his truck?

 

[NSDQ]

His truck was up for sale a few weeks ago due to hardships, but he ended up not having to sell it. Other than that, his info is in his signature.