Dreamdtt2000

I have some real dumb questions.

1) When u buy a turbo kit, do u need an intercooler in order to make it work?

2)Do superchargers have intercoolers? if not, can u get one for it?

3) What is the differences from a supercharger and a turbo?

Dreamdtt2000

Thanks alot

liloj

greddy doesnt sell intercoolers with there kits and they work.....BUT...it would be best to have one..superchargers can use them if you want....

supercharger = driven by belts
turbo = driven by exhuast

:ibmmovetocartalk:

Dreamdtt2000

We don't have car talk on here no more... do we? I don't see it... thanks

Dreamdtt2000

Which is better? Turbo or supercharger.

Zapata

wrong forum......


https://acurazine.com/forums/

Ron A

Yes, we still have Car Talk, so I moved this thread there.

Dreamdtt2000

How is it on the wrong forum? I didn't see car talk so i post in the ramblings sections. Anyway, back on topic.... Which is better? What are the pros and cons of each?

Dreamdtt2000

o k kool.

GTRspeeder

you dont really need a intercooler for a turbo but it would help gain power by cooling the air b4 it enters the engine. as for supercharger, its called a aftercooler and its the same explaination as a turbo intercooler.
like liloj said, turbo is ran by exhast and supercharger is ran by pullies, therefore, there would be no lag. turbo is good for high rpm and supercharger is good for low rpm

allmotor_2000

There are several myths mentioned here already, so hope this explanation helps clear things up for you:

A supercharger and turbocharger essentially do the same thing - they both compress air and 'force-feed' the engine. Because air is compressed, it is > than ambient pressure, hence the word 'boost'. A supercharger's compressor is turned by a belt that runs off the crank or other accessory. Because it is taking energy to make energy, there is a 'parasitic' loss involved in running a supercharger. Most Superchargers produce power linearly, so boost is a functional of RPM. Because of this you get a linear increase in power. Several S/C folks will tell you that having a S/C is like having a bigger motor. The parasitic loss can vary from application to application; in a top-fuel dragster about 1000hp of the 7000hp produced is used just to turn the supercharger!

A turbocharger uses the 'wasted' exhaust energy to turn a turbine which turns the compressor. There is not parasitic loss as the exhaust energy was wasted anyways. A turbocharger's response is based on its turbine design/size and housing design/size. A turbo can produce power at low rpms AND high rpms as long as it is designed properly. The response of a turbo is quite different than a S/C - in a low-boost application (such as ours), you can have max boost (6-10psi) from 3K RPMS all the way to redline. Consequently you can have oodles of torque at low RPMs.

Those of you familiar with the ideal gas law... you will know that temperature increases as pressure increases, so whether you have a S/C or a Turbo, compressing air will increase its temperature. Hot air is bad for the motor... it causes pre-ignition (similar to detonation). Also, hot air is less dense. A Turbo will increase air-temps more than a S/C as well hence intercoolers are more popular with turbo's (factors of proximity to the exhaust, routing long piping etc. have a effect as well). An intercooler basically cools the intake charger. It only works under pressure (so no point adding an Intercooler to a NA car). There are air-to-air IC's and liquid-to-air IC's. Liquid-to-air IC's are have a better immediate cooling capacity but require extra plumbing of water/pump etc. It's a good bet for drag-racing... a air-to-air IC is just as good for a road-car (racing or not).

Now you have boost and cold air... but need fuel to get this 'combusting' in the engine. There are several options for fuel including larger injectors, increasing fuel pressure and adding extra injectors.

A conversation on FI can go on forever, so unless you have a specific question, that's it for now!

18anatak

allmotor knows his shit.

Salut

I concur...

I saw allmotor and his car at the Simi Valley and East Ventura Meet....
(I don't have links to that thread which had pics... -- the thread was deleted with the new design)

Anyway... as Katana said... this man knows his turbo shiate....

Ciao

thealliance15

allmotor = FI master

thanks for clearing up somethings i didnt understand.

phipark

Boost for Noobs, thanks allmotor

allmotor_2000

Goad this kind of stuff helps out...

Shoofin

I was considering a blower for my '66 Rustang but decided to keep it naturally apirated, perhaps fuel inject it eventually..
Ed

Dreamdtt2000

Damn, after reading allmotor_2000 post, i learned alot. Thanks for all that replied.

CLovis

isnt it ironic..

scalbert

Depends on the type of SC, centrifugal or positive displacement.

Centrifugal superchargers have a fairly linear boost increase and is dependant on RPM. For example, is you have 4 PSI at 3000 RPM you can expect about 8 PSI at 6000 RPM. A centrifugal SC is essentially the compressor side of a turbo just being turned by a belt as opposed to the turbo's turbine wheel.

A positive displacement supercharger (often called a roots style blower, etc.) has nearly the same boost at all RPM. There may be some variances due to efficiencies but for the most part it can produce near maximum boost at any RPM. This is where the idea that it feels like a bigger engine was installed; it basically shifts the NA torque curve up. This style SC normally uses two rotors with interlocking lobes to move the air. This is the type of SC used on nearly all OEM SC applications and is what is used by Comptech for their J-Series SC kit.

Zapata

Why go with a centerfugial S/C over a Turbo? Never understood that.........

scalbert

Cost and ease of installation...

Plus, if you already have good low end torque NA but choke up top, the centrifugal SC works well. Look at the most common applications, the Mustang and F-Bodies.