V8 vs V6 SC

[turbo4s]

I dont know if you guys are feeling the same way I am but to tell you the truth, I understand that the new V6 is lighter, more MPG, Produces more Torque, and is going to be tuner friendly making better gains vs the V8. But to tell you the truth Stock for Stock I think the V8 is still faster. My car pulls so hard when I mash that pedal. There is just something about the V8 that is special. The way I look at is the bi turbo and the V8 are both special cars. I think they should have went back to bi turbo or juice the V8. I guess im just mad and felt like talking about this.

[charliemike]

How are you comparing your car to one that isn't even available to drive yet? And more importantly, why?

[40valve]

And more importantly, why?

You have to justify your purchase somehow, right?

[JMG]

You have to justify your purchase somehow, right?

I think we all do a little of that. The grass is always greener on the other side anyways. You can't always have the best. I love the V8, but a SC V6 would be nice. Either way my next car is going to be an RS4 or M3, but in the meantime I love my S4.

[Justincredible]

The mod friendly statement keeps popping up. So let me put my thoughts on that.

1 the ECU is Me17...each ECU has to be cracked as they all have there own encryption from Audi to stop us from trinketing...Im sure APR will be able to get around this but it is still going to be a deterrent

2 it is FSI you may need to worry about the fuel system and if it will even let you push more Hp. Look at the 2003+1.8T's you needed to add bigger injectors to get real Hp from even the stock Turbo.

3 most people are not going to mess with the car for a few years due to the price tag. The limit is not really going to get pushed till the demand from the consumer goes up. I think that will be several years away

4 look at this pic. The shaft for the supercharger APEARS to go towards the back of the car. This MIGHT suggest that if you were to change the pulley it wont be a easy task



5 Almost every one knows that the B5 is super mod friendly. But it is not like it became the power house that it is today over night. It took almost 6 years before the cars started making REAL power. With the RS6 turbos and the GT kits coming only in the past few years. Our cars are really only 3 to 4 years old. We with the supercharger in the near future are in the infancy of our performance potential

[SuperAvant]

4 look at this pic. The shaft for the supercharger APEARS to go towards the back of the car. This MIGHT suggest that if you were to change the pulley it wont be a easy task

Nah the S/C nose and pulley is in the front underneath that little curve on the engine cover. There arent any pulleys in the back for the Pulley to run off of. That tube in the back is the intake.

[cotmfk]

If it does everything better than our car's V8 stock for stock, then it is better stock for stock. A lot of people will say the sound and the instant grunt is what will keep them with the V8. If you are happy with your car, then good for you, but don't be so foolish to say the new engine can't be better than the current V8(not everyone does this). The car isn't out yet, so there is no telling if it is better or worse in the real world.

I believe supercharging gives more low end grunt and turbos give more high end grunt, so... if this is true, then the supercharged V6 stock could get all that instant torque everyone wants from V8's. I believe there is no "lag" with superchargers.

[Justincredible]

Nah the S/C nose and pulley is in the front underneath that little curve on the engine cover. There arent any pulleys in the back for the Pulley to run off of. That tube in the back is the intake.

Ya I found the diagram for the supercharger it is in the front. I don't like that intake tho that kinda looks hokie? Ah well it still is FSI let em try to change there fuel injectors.

[DubSport]

I believe supercharging gives more low end grunt and turbos give more high end grunt, so... if this is true, then the supercharged V6 stock could get all that instant torque everyone wants from V8's. I believe there is no "lag" with superchargers.

Close...
Centrifugal Superchargers don't make full boost until redline. This means that your max horsepower rating is not realized until your engine is screaming.

Twin Screw Superchargers (like the one on this new S4) make near full boost at approx 1-1.2K RPM, which means you get most of your torque pretty much right away. Torque curve looks like a tabletop - this will be good, trust me.

Turbos can be made to make near full boost at lowish RPMs, depending on turbo sizes etc.

Turbo > Twin Screw > Centrifugal

[b6onboost]

Stock for Stock, the B8 S4 will be faster. It will have more torque available over a wider, flatter torque curve. It will have more torque at 1-2k rpm than the current V8 does. It will get better mpg and throw you back in your seat just as hard if not harder. Only thing you will give up is the V8 sound.

I don't understand why a Bi-Turbo V6 and a V8 are 'special' yet a S/C V6 cannot be.

[CHECKERED]

V8 will pull harder at 80+

thats how I rape turbo I4 on the freeway...."you have a 432hp STi"..."what?"...

[shifty711]

V8 will pull harder at 80+

thats how I rape turbo I4 on the freeway...."you have a 432hp STi"..."what?"...

Dude, there is no way in hell you are pulling a 400+hp Sti on the freeway.

He was probably just messing with you, or he doesnt have 400+hp.

Also the S4 is slow on the freeway when compared to other cars with similar 1/4 mile times.

So, yeah 400+hp. Theres no chance man

[CHECKERED]

Dude, there is no way in hell you are pulling a 400+hp Sti on the freeway.

He was probably just messing with you, or he doesnt have 400+hp.

Also the S4 is slow on the freeway when compared to other cars with similar 1/4 mile times.

So, yeah 400+hp. Theres no chance man

maybe it was stock...

[Auditude2.0T]

maybe it was stock...

u went from "432 HP" a very exact number to maybe it was stock. Thats a big difference. I would bet that with just a chip and catback an STI would take an S4 top end.

[Auditude2.0T]

I dont know if you guys are feeling the same way I am but to tell you the truth, I understand that the new V6 is lighter, more MPG, Produces more Torque, and is going to be tuner friendly making better gains vs the V8. But to tell you the truth Stock for Stock I think the V8 is still faster. My car pulls so hard when I mash that pedal. There is just something about the V8 that is special. The way I look at is the bi turbo and the V8 are both special cars. I think they should have went back to bi turbo or juice the V8. I guess im just mad and felt like talking about this.

Thats a pretty strong statement for a car you haven't driven, nor has anyone else. My A4 pulls hard when i mash the pedal, doesn't mean im going to beat an RS4 or anything else.

Since we have no driving experiences to back us up thats just go with the statistics. The B8 S4 has more Torque through the rev band, more hp available through the rev band, has two better transmission options (dsg now available), is significantly lighter, has almost 50/50 Weight distribution, has 60/40 Quattro etc... On paper the new S4 should "walk" a B6 or B7. Look at the past stock for stock. The B5 S4 was alot quicker than the C4 S4, the B6/B7 is a good amount quicker than the B5 S4, so what gives you the idea Audi is going to build a slower car than before. Obviously there not going backwards. If Audi thought that supercharging the S4 was better i think im going to trust their engineers. I have a suspision that Audi knows what there doing with this car.

[CHECKERED]

u went from "432 HP" a very exact number to maybe it was stock. Thats a big difference. I would bet that with just a chip and catback an STI would take an S4 to 150.

well the guys yelled out his window that it was 432hp, his sti did not look stock, so I’m not going to be like "show me a dyno chart" we raced from 80+ and I slowly kept pulling until 130 when he shut down, he was a car length behind

[Auditude2.0T]

well the guys yelled out his window that it was 432hp, his sti did not look stock, so I’m not going to be like "show me a dyno chart" we raced from 80+ and I slowly kept pulling until 130 when he shut down, he was a car length behind

If that HP rating is true nice kill. On the street its all driver and you must have out driven him. Nice:)

[a4dc89]

Thats a pretty strong statement for a car you haven't driven, nor has anyone else. My A4 pulls hard when i mash the pedal, doesn't mean im going to beat an RS4 or anything else.

Since we have no driving experiences to back us up thats just go with the statistics. The B8 S4 has more Torque through the rev band, more hp available through the rev band, has two better transmission options (dsg now available), is significantly lighter, has almost 50/50 Weight distribution, has 60/40 Quattro etc... On paper the new S4 should "walk" a B6 or B7. Look at the past stock for stock. The B5 S4 was alot quicker than the C4 S4, the B6/B7 is a good amount quicker than the B5 S4, so what gives you the idea Audi is going to build a slower car than before. Obviously there not going backwards. If Audi thought that supercharging the S4 was better i think im going to trust their engineers. I have a suspision that Audi knows what there doing with this car.

+1

[mystro]

Coming from a new 2001 B5 S4 and modding it. I was happy to get rid of all the turbo issues I had. The V8 S4 just runs better. Cold days hot days it doesnt seem to matter to the v8. I cant go back to a turbo v6. My next car will be a V8 or V10.

[Maverick]

I love the V8 motor, it has been around forever.
smooth and powerful.

[actlsub9]

Stock for Stock I think the V8 is still faster. My car pulls so hard when I mash that pedal.

That's some good reasoning

[Captain Insano]

V8 will pull harder at 80+

thats how I rape turbo I4 on the freeway...."you have a 432hp STi"..."what?"...

Uhhh.. I've owned two STis... There is no way you came close to a 400 hp (WHP or crank hp, I don't care) STi even from a roll. My 2004 was making 400 to the wheels and my B6 S4 would get walked so hard by it the contest would be laughable. In fact, even a stock STi I bet you would barely take (the 2004 - 2007 STi = 3200 - 3300 lb car vs your 4000 lb hog) from a roll if at all. I love the V8, but the turbo 4 of the STi is pretty potent.

If you walked him at 80 I would hazard a guess he wasn't trying or drives like a moron. Or maybe you were just joking. I assure you, unless his car was broke his was faster.

PS - My 2007 STi with exhaust and tune ($1000 in mods) made 320whp & 380wtq on 93 pump. This in a 3300 lb car. Think about that in relation to your B6 S4 for a second....

PSS - Maybe you were thinking of the Evo. The STi is a turbo 4 boxer engine. Not a turbo I4. The Evo is a turbo I4.... Just FYI.

[S4DTM]

How many times are we gonna have this same conversation...all I see on the forums now a day are "new S4 versus V8"...honestly, Audi had to make the new S4 a little faster and more fuel efficient or they wouldn't sell any. It's a nice engine, there's no doubting that...completely different from the V8 though. Personally, I prefer the sound of a V8 (especially when supercharged) because it sets the car apart from most others and nearly everyone who has commented on my car tells me they love that it's a V8. But a supercharged V6 has a lot of potential, so it's for all those people looking to get better performance boosts and save a little mula on gas. The V8 is slower, that's a fact...but only by a few 10ths of a second...pick a car for the way it makes you feel when you start it up and drive it hard on roads that were made for S4s, not for straightaway 0-60 times. But that's just my opinion on the matter...

[SuperAvant]

All this talk about modability with the V6 SC - Meh. Roots blowers dont have much modability. Not nearly as much as a Centrifigual or a turbo. They generate too much stinking heat to really turn on any boost. Not to mention, controlling boost is a pain in the ass because you have to constantly switch out pulleys. While they do create a very nice torque curve, they are hindered by the ability to really be modded much beyond their current power numbers.

Now dont get me wrong, Roots blowers also make some of the most power of any blower, but its all relative to the motor they get put on.