ok well i no what they are all about but i forgot this....Is the turbo low end and super top end or am i wrong....turbo is for off the line and super is for top speed right??....lmk thanks
super charger is instant power and a turbo needs to be spooled.
t to the maxx2 Wrote:depends on application
There is no depends if you have a laggy supercharger or a spooled turbo at idle you have a problem.
OK but what does each one help with.....does the turbo help with low end and the supercharger helps with top end?? thats all i wanna no
Revoguy22 Wrote:OK but what does each one help with.....does the turbo help with low end and the supercharger helps with top end?? thats all i wanna no
Supercharger runs off a pulley from your crankshaft. It provides low end to mid range power. however with the power gains you are still taking power from the engine.
A turbo charger runs off exhaust gases. The exhaust gases "spool" or spin the turbo up to a point where it develops a vacuum and compresses air from the intake side on the turbo, and forces it into your engine. So, if you have a big beefy turbo, it will takje a second to spool, thus "turbo lag"
If you look at it this way, Turbo is usually a top end thing, because once your engine speed drops you will have to spool the turbo again. where if you had a supercharger, when you stomped on the gas after a stop, you would pretty much take right off.
There are some things that I am missing but this is pretty much a general answer.
Ok thanks you J Dub..thats what i wanted to basically no.
Neither, any fuel injested car can be programmed with a specific fuel curve to get any kind of power delivery your looking for. But for superchagers, they are a bit harder to fine tune. Turbos are great for fine tuning and delivering a specific tune. Thats why you see they in so many 4 bangers, lite car instant power a bad thing. Its been done (ie. chevy colbalt) been there tire roasters more then anything.
Whitey04 Wrote:Neither, any fuel injested car can be programmed with a specific fuel curve to get any kind of power delivery your looking for. But for superchagers, they are a bit harder to fine tune. Turbos are great for fine tuning and delivering a specific tune. Thats why you see they in so many 4 bangers, lite car instant power a bad thing. Its been done (ie. chevy colbalt) been there tire roasters more then anything.
Thank you for adding to that. Yes you can pretty much tune any engine with a computer to add power to a specific area. High end , Low end. But I would probably just do that with an aftermarket Camshaft or something. Not real big into forced induction, unless it's a small engine.
I didn't realize he was looking that general. I was also typing that before I seen your post sorry. Then my dog throw up and I finished the post it took me like 10 minutes to get that out. haha Damn dog...:puke:
Whitey04 Wrote:I didn't realize he was looking that general. I was also typing that before I seen your post sorry. Then my dog throw up and I finished the post it took me like 10 minutes to get that out. haha Damn dog...:puke:
LOL Sorry to hear about your dog. Yeah you can probably put the power where you want it now days with that stuff, technology and engines have come a long way in 10 years
J-Dub Wrote:Yeah you can probably put the power where you want it now days with that stuff, technology and engines have come a long way in 10 years
Amen brother!
Superchargers are great in drag racing. All of the top fuel dragsters run superchargers because its instant power. And 1/10th at the beginning of the 1/4 mile is worth 3/10ths at the end (roughly).
However with todays variable vain turbo's, antilag systems and fueling curves you can pretty much get instant boost with a turbo. There will always be some delay though.
Cetrifugal chargers are simply a turbine intake impeller casing mounted to a wheel chair transmission (really, thats what the first centrifugal supercharger was, though now its all custom built exclusively for automotive purposes). And a centrifugal supercharger does take time to make boost, unlike a whipple or roots type supercharger.
A big single turbo makes more power but takes longer to spool. Two smaller twin turbo's can spool faster and make the same power, but are heavier (extra turbo and piping).
__________________
Very simplified boost equation to figure out how much extra power an engine can make under "x" psi of boost.
(14.7 + xPSI) / 14.7 = E
E * (stock HP rating) = HP under xPSI of boost.
Example: 1998 LS1 from a corvette. 350hp n/a.
(14.7 + 7psi boost) / 14.7 = 1.476.
1.476 * 350hp = estimated 516hp at the crank under 7psi of boost.
This is an estimate. There are many variables not taken into account. Its just meant to give someone an idea of how boost affects an engines air flow.
1/10 in the "60 ft" is worth 2 tenths in the 1/4....every 100 lbs of dead weight is worth 1/10 in the quarter, and every 1 lb of rotating weight (wheels/tires/rotors,internals etc etc etc) is worth 7 lbs of dead weight in the quarter....
^^ that will go right over most of their heads...
^^ that will go right over most of their heads...
blktransam Wrote:1/10 in the "60 ft" is worth 2 tenths in the 1/4....every 100 lbs of dead weight is worth 1/10 in the quarter, and every 1 lb of rotating weight (wheels/tires/rotors,internals etc etc etc) is worth 7 lbs of dead weight in the quarter....
I've always heard .3, but either way launch is important.
Less rotating mass is almost always a good thing. I'd rather have a lighter driveline because I prefer road racing and don't need to hit it hard at launch. I'd rather have the engine gain RPM quicker.
i turboed my civic back in the day. 7 psi was a def fun increase.
i could start at a light real slow in 1st, roll into the gas and paint 2 stripes in the road once boost hit.
at the track it dropped it almost 2 full seconds. i think it had more in it, but the 1st trip down i slipped the clutch to much and got it hot. kinda killed it for the rest of the night for getting the best launch possible.
for the street, it was fun as hell. if i was following someone doing 55 and wanted to pass, id drop the hammer and would be at 80 by time my rear passed their front.
GENERALLY...
a turbo can be designed to do any thing. all low (semi trucks) broad rpm (stock like say a subaru) or high for racing... turbos like a load on the motor... and are better usually do to the ability to cool the charge air. turbos dont rob power to make power and MPG should be better than with a S/C.
supers are great for general driving. like a GTP , those really get up and go from the stop light.
thats the thing about super chargers they "take" power to make power but are alot more user friendly. me I am a "cheater" and like nitrous which is slowy fading due to all the computer shit now...cant beat the power per dollar with nitrous....we run a 7 sec street car which is a 88 mustang with a 605 cubic inch chevy with pontiac big cheif heads and 2 plates with a fogger. also weighs 3400 not to bad for a "street car"....
cant beat a good ol terminator though they are pricey but run like a rapped ape
blktransam Wrote:thats the thing about super chargers they "take" power to make power but are alot more user friendly. me I am a "cheater" and like nitrous which is slowy fading due to all the computer shit now...cant beat the power per dollar with nitrous....we run a 7 sec street car which is a 88 mustang with a 605 cubic inch chevy with pontiac big cheif heads and 2 plates with a fogger. also weighs 3400 not to bad for a "street car"....
cant beat a good ol terminator though they are pricey but run like a rapped ape
LOL, only babies use bottles! J/F/W/Y man!
haha whhaa whha me need bottle lol...my old stang plates were botlfed
blktransam Wrote:cant beat a good ol terminator though they are pricey but run like a rapped ape
Thats what I'm running, thinking about spraying it. Nothing serious, just a race saver.
Lets not forget the need for oil coolers, better radiators, and intercoolers for forced induction vehicles. Those things make alot of heat.
...u dont "need" a intercooler..nor better radiator....or oil cooler...if u run a auto u need a trans cooler..but that goes for any performance car