Cedarberry

Noob to boosted cars, and just wondering why they sound like there comming apart at idle. Does the racket improve as it spins up?

Some sound absolutly horrible to me, are they all like that?

MRc5z

Quickshift_C5

A roots/twinscrew blower isn't. That awful whining is like nails on a calkboard.

robert miller

Some are made with the cut gears r blades which give them that sound. But also the car could also have a loud BOV on it & not the quite one that you can also get for the car. Robert

sjhanc

Any device that has to move large quantities of air at near supersonic speeds is going to make a lot of noise, and the machinery necessary to drive it adds its own noise. Aeronautical engineers have worked on the noise issue for decades with limited success. The fact that successful noise suppression drastically reduces the effectiveness of the 'air mover' disqualifies anything that DOES work. We want HORSEPOWER, and lots of THIS is not quiet!

The car companies sell lots of quiet automobiles, but none of those are the quickest or fastest, and certainly not Corvettes.

bill mcdonald

T-trim on mine, at idle you have no idea it's there.
I wanted that jets sound whine but, I get nothing till I shift, and maybe you hear the blow off.

Maybe a Y-trim can help with that.

ss4luck

If you hear an Fseries with a race valve in person it sounds like the car is dragging the under tray with it hahaha

Kingtal0n

If you want stealth boost use a turbocharger.


They are very quiet. You can do all kinds of tricks to make them even quieter. If you size it properly it will also improve fuel economy and there really isn't any lag to speak of on a V8 engine with the right size turbo.

Cedarberry

Thanks for all the input, had a turbo sled and just could not deal with the BOV popping all the time, drove me nuts.

Just been looking at a few different c5s, sold my last one and kicking myself.

High horse N/A cars are outta my budget, but have seen a few SC cars I could swing. This time out I'm just buying already built, I had a lot of fun moddin my last one, but spent a ton. Save quite a bit purchasing already built.

Kingtal0n

Er. You realize that it isn't necessary to listen to the bypass. You could have easily recirculated it with a noise suppression tube like factory turbo cars usually have.

turbocharger add fuel economy. I would never drive a car without one, not a combustion gasoline engine or diesel.

NSFW

Citation needed.

I can see how a car could get better mileage with 2.5L and a turbo rather than 3.5L NA, and have the same peak horsepower. But I can't see how adding a turbo to an engine will increase fuel economy. They just freewheel when you're driving at a steady speed, and while you're accelerating your mileage is terrible either way.

abusdriver

I have a ProCharger D1SC with helical gears and you can barely hear it at idle. When you get on it, you can hear the supercharger whine but it doesn't overpower the exhaust note and I think it all sounds MAH-VEH-LOUS, SIMPLY MAH-VEH-LOUS!

junk c5

They are especially attempting to sound broken so the owner replaces it with a turbo kit.

Kingtal0n

Kinetic energy from exhaust molecules are transferred to intake molecules.

Think turbine on a turbine. Like they do for power plants, each stage of turbine recovers some percentage of efficiency by using leftover heat somehow.

The turbos needs to be sized properly. A 120lb/min turbo on a 2.0L engine isn't going to be able to return much at low speeds.

NSFW

That's how they make power, sure, but you want mileage and you're making boost, you're doing it wrong.

StrangelovesM6Vert

Having an M6 I hated the tshing BOV on every shift so I recirculated it into the air filter.
The A&A Vortech you can hear at idle outside but I can't even hear it inside the vehicle.
Now all I get is the occasional slight chirping from the air hitting the impeller.



Made a longer path with a baffle box

Kingtal0n

The difference is significant when disconnecting the charge pipe to the engine a loss of 2-3mpg is typical on cars with an intercooler due to the sheer volume of plumbing required on behalf of the engine to pull through on the intake stroke.

With the turbo connected however the effort is redoubled. Not only does the piston no longer need work as much to pull down but also during the exhaust stroke higher exhaust gas pressure provides some cushion for the slowing the piston.

StrangelovesM6Vert

Ah the backpressure myth.
Is going up a hill easier than going down?
The engine doesn't pull air.
The atmospheric pressure of earth pushes it in.
You have the force backwards.
On my Prochargered intercooled long tube HEMI Cherokee I'm
actually getting 1/2 mpg better, WOT blasts notwithstanding
The less backpressure the better the engine can breathe,
and the more power it will make.

robert miller

Man if you get them set up correct no sound 7 a ton of power plus will outrun a blower car all day long if set up on sizes are eq. Robert

StrangelovesM6Vert

Blowers are more easy to do on our cars.