Supercharger vs Turbo
#1
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Supercharger vs Turbo
MaximumHP put this together. His latest dyno run vs mine. Both cars at about 5psi. I do have a 3" down pipe, 3" test pipe, and 2.5" cat back compared to his y-pipe only. But besides that they are very similar as in stock manifold, same boost, etc...
#7
I couldn't fix your brakes, so I made your horn louder
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SC runs off the belt, turbo, off waste.
I'm willing to bet that the majority of the power is due to the turbo flowing more air.
In other words, 12 psi on a t28 isn't flowing anything near what 12 psi on a t04 will.
I'm willing to bet that the majority of the power is due to the turbo flowing more air.
In other words, 12 psi on a t28 isn't flowing anything near what 12 psi on a t04 will.
#8
Originally Posted by seximagtr
SC runs off the belt, turbo, off waste.
I'm willing to bet that the majority of the power is due to the turbo flowing more air.
In other words, 12 psi on a t28 isn't flowing anything near what 12 psi on a t04 will.
I'm willing to bet that the majority of the power is due to the turbo flowing more air.
In other words, 12 psi on a t28 isn't flowing anything near what 12 psi on a t04 will.
#9
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Originally Posted by Stephen Max
Jeez, rub it in why don't ya?
Anyway, congrats on the successful install. You're making almost as much torque at 5 psi peak boost as I am at 12 psi peak boost.
Anyway, congrats on the successful install. You're making almost as much torque at 5 psi peak boost as I am at 12 psi peak boost.
heheheheh
Hey, I did not put that together just passing it along
#10
yeah i guess it takes a bit of horsepower to run a supercharger. do you think once that turbo spools up that it is actually assisting the exhaust flow? probaly not but i guess it just doesnt restrict exhaust as much as you would think. sucker flows good man!
#11
BUT what IF....you had a supercharger w/ bypassed AC? Would that give a good bit of power back into the blower? (adding a pulley ~minus 20hp)...but taking another one away thats a lot bigger...wouldnt that show improvement?
#12
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Originally Posted by bijangxe
BUT what IF....you had a supercharger w/ bypassed AC? Would that give a good bit of power back into the blower? (adding a pulley ~minus 20hp)...but taking another one away thats a lot bigger...wouldnt that show improvement?
#14
Originally Posted by bijangxe
3 inch test pipe on a turbo car, that junk kills your low end torque!!! I reinstalled my 3 inch cat.
#17
Out of all the "bigger is better" mentality that normaly is wrong about car parts the down pipe is the exception. The bigger there the better and it will help power all through the power curve. Several feet after the turbo you can start to narrow the pipe to fit under the car if needed but exhaust restriction should always be kept to a minimum..
~Scott
~Scott
#21
Originally Posted by bijangxe
BUT what IF....you had a supercharger w/ bypassed AC? Would that give a good bit of power back into the blower? (adding a pulley ~minus 20hp)...but taking another one away thats a lot bigger...wouldnt that show improvement?
You are carrying ~50lbs of A/C stuff around ,though. Broaner ripped his out. I could compensate for that weight by throwing out my spare tire and jack, cleaning 20lbs of McDonalds garbage from back seat, and going on a diet to lose 10lbs. But I won't.
#22
I never really understoof the whole removing AC thing, unless you we doing some really hardcore racing with a lot of money on the line, it isnt going to even make a noticable difference if thats the only weight reduction you do.
As mhadford said, if you dont have it on, its free-wheeling on a next to nothing resistant pulley.
Youll be happy you have it when summer hits, in GA
As mhadford said, if you dont have it on, its free-wheeling on a next to nothing resistant pulley.
Youll be happy you have it when summer hits, in GA
#23
Not having AC sucks... my last car didn't have AC because I never got it recharged after hitting a deer, and my turbo car doesn't have it either. Going to suck in the summer. I'm worried that the AC in my beater isn't working either.
#24
Having no AC rocks! It may be free wheeling but it still has intertia. Having no power steering also rocks! I'm hoping these two will help me get to 300 wheel on the 3.3. One super short belt... soon to be a bit longer.
I did it for many more reasons besides the power. Cleanliness of engine bay, weight saving, throttle response, gas mileage, money(I sold it.)
I did it for many more reasons besides the power. Cleanliness of engine bay, weight saving, throttle response, gas mileage, money(I sold it.)
#26
inertia isnt causing the crankshaft to waste any more power on it than it would if it werent there. The real killer of an A/C is having it turned on while trying to race, and it cycles on and off so much to prevent evaporator freeze-up you dont know when its actually taking away crankshaft power. The crankshaft is already spinning, and a belt with no resistance isnt going to rob HP.
#27
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Nice comparison Mike. you should sell your 2.5" cat back and get a 3" - bigger is always better with boost - you don't have to worry about that scavaging effect crap.
The difference is the inherant effeciencies of the turbo and SC. The best SC's are about 50% effecient. Mike T04 at 5psi is about 73% (can't remeber mikes exact compressor trim).
BTW Mike, when you start running more boost things will just get better. That big ol compressor isn't designed to run low boost like you are. Between 9 and 22 psi you will be hitting 78% effeciency =)
The difference is the inherant effeciencies of the turbo and SC. The best SC's are about 50% effecient. Mike T04 at 5psi is about 73% (can't remeber mikes exact compressor trim).
BTW Mike, when you start running more boost things will just get better. That big ol compressor isn't designed to run low boost like you are. Between 9 and 22 psi you will be hitting 78% effeciency =)
#28
Originally Posted by Broaner
Having no AC rocks! It may be free wheeling but it still has intertia. Having no power steering also rocks! I'm hoping these two will help me get to 300 wheel on the 3.3. One super short belt... soon to be a bit longer.
I did it for many more reasons besides the power. Cleanliness of engine bay, weight saving, throttle response, gas mileage, money(I sold it.)
I did it for many more reasons besides the power. Cleanliness of engine bay, weight saving, throttle response, gas mileage, money(I sold it.)
couldn't say it any better than that, the throttle response was the first thing I noticed, just amazing! when I took off PS and AC.
#31
Originally Posted by bijangxe
w/ what other boost mods?
Originally Posted by Oblongshapes
The crankshaft is already spinning, and a belt with no resistance isnt going to rob HP.
Originally Posted by I30tMikeD
The car will simply suck to drive w/o PS.....
#32
He's not talking about driving at speed hes talking about parking, trying to pull out of driveways, etc. Everyone knows that driving at speed without PS isn't an issue. Mike's driven my car so he knows exactly what hes saying. Anything over 10mph isn't bad, but when you have to crank the wheel from one side to the other to pull into or out of a parking space its miserable, even with relatively skinny 215s on it. With the 195 snows it wasn't that bad, but I can't imagine what my 245-45 stickies are going to feel like.
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