I have been looking through some threads trying to understand what boost is and what it does, but I haven't found anything. Can someone please explain, thanks
The way a turbo works is by forcing air into the engine at a much faster rate than an engine could draw in on it's own, essentially shoving it down the intake. More air + more fuel = more power.
The amount of pressure the turbo puts on the intake is called boost and it's measured in PSI (pounds per square inch).
That's the short and sweet version, if you'd like I can get more technical though.
Two forms you can go with, turbocharger or supercharger.
Turbo uses the out rushing exhaust to spin a compressor wheel which feeds or boost's the air entering the intake.
A supercharger uses a compressor that's driven by a belt off the crank which boosts the air entering the intake.
As frostbit stated, more air, more fuel in the cylinders = more power. Significantly more power. Each has it's advantages and dis-advantages. I have DDM's supercharger kit and love it. Poke around some more, pro's and con's of each have been debated here many times .
Mods: DDM Stage II supercharger, long tube header and cat, Probeam, and Race Backbone. Solo Performance SQR-2 catback. Norm's first center exit Solstice rear fascia. JPM center console. DashHawk.
The way a turbo works is by forcing air into the engine at a much faster rate than an engine could draw in on it's own, essentially shoving it down the intake. More air + more fuel = more power.
The amount of pressure the turbo puts on the intake is called boost and it's measured in PSI (pounds per square inch).
That's the short and sweet version, if you'd like I can get more technical though.
the size of a cylendar and piston allows a certain volume of air, that volume is limited to atmospheric pressure (+- depending on speed)
the turbo charger compresses air and therefor increases the amount of volume of that air in the cylendars, for all practical purposes, this does the same thing as adding cubic inches for the burn cycle
this does a number of things, it also allows you to run without the "compressor" when power is not needed, therefore giving you a "big" engine when you need it and a "small" engine when you don't, improving gas mileage
So basically it's just making a more complete combustion
I'll say no.
More air, more fuel, just a bigger bang. Yes it does mimic a bigger motor because of the higher volume of air/fuel. The question you have to ask yourself, is where do you want the power band/boost to start .
Mods: DDM Stage II supercharger, long tube header and cat, Probeam, and Race Backbone. Solo Performance SQR-2 catback. Norm's first center exit Solstice rear fascia. JPM center console. DashHawk.
More air, more fuel, just a bigger bang. Yes it does mimic a bigger motor because of the higher volume of air/fuel. The question you have to ask yourself, is where do you want the power band/boost to start .
Usually more boost = later in the power band, meaning you have to rev up to 4-5k rpm before the power comes in. It's always a trade off.
Usually more boost = later in the power band, meaning you have to rev up to 4-5k rpm before the power comes in. It's always a trade off.
Not with positive displacement supercharger. ( help me SolGTP, I'm in over my head ) The trade off is, are you ok with losing a little parisitic loss at high rpms because you're running a belt, or do you want the boost to be off idle. For me it was no contest
Mods: DDM Stage II supercharger, long tube header and cat, Probeam, and Race Backbone. Solo Performance SQR-2 catback. Norm's first center exit Solstice rear fascia. JPM center console. DashHawk.
Not with positive displacement supercharger. ( help me SolGTP, I'm in over my head ) The trade off is, are you ok with losing a little parisitic loss at high rpms because you're running a belt, or do you want the boost to be off idle. For me it was no contest
I was speaking about the turbo's in the Redline's and GXP's. Didn't want to immediately go over people's heads.
Yes, positive displacement superchargers do have a large amount of power early in the power band and continue to be very controllable throughout. Downside being you take a minuscule hit on gas mileage and you have less opportunity for BIG power.
Turbo's on the other hand do not have the off the line torque, power arrives later in the power band (bigger turbo's take more exhaust to spin, so you have to be rev'd higher), but you will have the opportunity for more boost and more power, as well as less parasitic losses to the motor.
Two different methods of reaching the same goal. To put a big fat smile on your face.
I was speaking about the turbo's in the Redline's and GXP's. Didn't want to immediately go over people's heads.
Yes, positive displacement superchargers do have a large amount of power early in the power band and continue to be very controllable throughout. Downside being you take a minuscule hit on gas mileage and you have less opportunity for BIG power.Not sure I understand or agree with this statement
Turbo's on the other hand do not have the off the line torque, power arrives later in the power band (bigger turbo's take more exhaust to spin, so you have to be rev'd higher), but you will have the opportunity for more boost and more power, as well as less parasitic losses to the motor.
Two different methods of reaching the same goal. To put a big fat smile on your face.
I'll still say the debate comes down to where you want the gains, low to mid, or mid to high
Mods: DDM Stage II supercharger, long tube header and cat, Probeam, and Race Backbone. Solo Performance SQR-2 catback. Norm's first center exit Solstice rear fascia. JPM center console. DashHawk.
I'll still say the debate comes down to where you want the gains, low to mid, or mid to high
All the vette guys go from positive displacement (maggie's and kb's) to either centrifugal (vortech) or turbo's (TTiX kits) when they want to get way up there in power.
Trust me, eventually the PD's run out of breath and the other two are there when you want to keep going, you may lose a little down low but you will far surpass it up high. Although there are a few newer PD designs that show some serious promise.
All the vette guys go from positive displacement (maggie's and kb's) to either centrifugal (vortech) or turbo's (TTiX kits) when they want to get way up there in power.
Trust me, eventually the PD's run out of breath and the other two are there when you want to keep going, you may lose a little down low but you will far surpass it up high.
Corvettes already have enough grunt...big 8 cyl pushrod engines are looking for help when
the revs get high.
A 4 cyl engine gains a big advantage down low if boosted by a supercharger.
Jackknife
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