Forced Induction Turbos/Superchargers

Supercharger "Lag" vs. Turbo Lag

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Old Mar 7, 2012 | 06:19 PM
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From: HBG/Hanover
Supercharger "Lag" vs. Turbo Lag

Since some people seem to believe that a s/c has no lag and hits full boost immediately @ wot let's see some vids of these m62's and tvs's hitting full boost immediately.
This pretty much stems off of the s/c guys using turbo lag and powerband for an excuse as to why a s/c is better. This is not a which is better, just comparing the lag of the s/c's to the lag of a properly sized turbo (properly sized being purely opinion of course (to me an s252et or smaller similar turbo from another manufacturer)). Of course this is going to change with wheel and housing options but you get the gist.

I personally maintain that a s/c does not hit full boost right away in our application as neither does a turbocharger. A s/c will always hit a point then proceed to full boost as rpms go, turbo will always do the same also of course, which leads me to maintain that this magical "powerband" and "no lag" are the remnants of the s/c nutswingers last defense and they seem to grip onto these excuses like it's a life or death situation which I feel is a very moot point given a s/c compared to a "properly" sized turbo. Of course this could be faked by starting at a higher rpm or brake boosting in the turbos case, this isn't about that.

Keep in mind this is all in toe with a stock longblock, as a ported head and such can bring on a different effect also.

Again, this is not to be a flame war against each other just to observe and discuss and dispel some of the myths that seem to run rampant.






TVS hits boost and lags to the last 5 or so psi that the pulley will maintain

Tvs Cobalt boost - YouTube


Oh and again? Startlingly odd.

TVS Window Down - YouTube

Not sure what rpm these were started at as none show a speedo shot, but according to some, s/c hits full boost ANYTIME. So clearly not the case.



Now this is an s252et starting in 3rd gear @ 40, about 2.5k, speedo shot is 1st but you can clearly hear when full boost is achieved @ about 3.3-3.5k. Note this is without really any tuning to get the turbo to spool faster also.

S252et 15psi 3rd gear 40 roll - YouTube



Anyone with a tvs care to do a similar video as the turbocharged one to get a somewhat equal comparison???


Discuss.

Last edited by 05Slowline; Mar 7, 2012 at 06:24 PM.
Old Mar 7, 2012 | 06:24 PM
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My s256 was pretty laggy. I didn't get full boost until almost 4k. To compare when it had to stock turbo (t25) it would go to 12 lbs pretty much instantly.
Old Mar 7, 2012 | 06:26 PM
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true story, plus it's not like having more boost is better IDGAF if they push 30 psi at 1k rpms if I still flow more air lol
Old Mar 7, 2012 | 06:26 PM
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That was on a dsm with an extended or non extended tip?
I would rule the 256 into a larger "improperly sized" turbo for a 2.0l as far as quick spool goes, especially if it's not the ET.
Old Mar 7, 2012 | 06:28 PM
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I hate the feel of turbo powerbands, an sc engine feels like an NA, thats the appeal
Old Mar 7, 2012 | 06:30 PM
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Thanks for the ever so invaluable insight.
What exactly turbo cars have you driven?
Cause I have driven both on the same car and can say there is no comparison with a proper turbocharger.
Old Mar 7, 2012 | 06:33 PM
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It's my personal opinion, im not trying to change yours. I'm only sharing.

I've driven an ss/tc, 08 sti, 07 WRX, 10 speed3 and the new gtr. Being a valet has its perks
Old Mar 7, 2012 | 06:35 PM
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Originally Posted by BLue NoTe
It's my personal opinion, im not trying to change yours. I'm only sharing.

I've driven an ss/tc, 08 sti, 07 WRX, 10 speed3 and the new gtr. Being a valet has its perks
So you've driven stock turbo cars then.
And you think that they were not as responsive as a s/c setup would be?
I have driven my buddies ss/tc when it was stock everything and it was just as responsive if not more than my 3.0/42's blower setup.
Old Mar 7, 2012 | 06:47 PM
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The best powerband of those is the WRX, my roommates car. Canned cobb tune on it
Old Mar 7, 2012 | 07:06 PM
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i agree with slowline, with a proper setup and a proper turbocharger mainly the lag is minimal and if anything is much better power band than a supercharger a hundred times.
Old Mar 7, 2012 | 07:07 PM
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Originally Posted by BLue NoTe
an sc engine feels like an NA, thats the appeal
i agree with this although it still takes time for a supercharger to get full boost.
Old Mar 7, 2012 | 07:14 PM
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Oh my god this **** again, some people just like the sound of the supercharger vs the turbo, just let this **** die already slowline
Old Mar 7, 2012 | 07:15 PM
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ooo subd
Old Mar 7, 2012 | 07:16 PM
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Originally Posted by 05Slowline
That was on a dsm with an extended or non extended tip?
I would rule the 256 into a larger "improperly sized" turbo for a 2.0l as far as quick spool goes, especially if it's not the ET.
It was an extended tip. I also had the fp exhaust manifold which made it a little slower. A ported stock manifold would have probably spooled faster but I got the other manifold really cheap. I wish I would have got the s259 with the billet wheel now. My buddy has a 366et with the billet wheel and it spools pretty fast for its size. I personally like turbos better than superchargers but I'm too cheap to switch. Plus Im not really interested in "going fast" anymore. Spent wayyyyy to much money on cars in the past. I'm happy with the car now I rather spend my money on the girlfriend or save it.
Old Mar 7, 2012 | 07:40 PM
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Originally Posted by Vander Nars
Oh my god this **** again, some people just like the sound of the supercharger vs the turbo, just let this **** die already slowline
Sorry kid, this isn't about which sounds better or who prefers what sound, or which is better s/c or t/c. If that's all you have to bring to the table or you simply cannot read/comprehend the concept being discussed, you can step on the **** out the door you came in.


Originally Posted by Superbalt06
It was an extended tip. I also had the fp exhaust manifold which made it a little slower. A ported stock manifold would have probably spooled faster but I got the other manifold really cheap. I wish I would have got the s259 with the billet wheel now. My buddy has a 366et with the billet wheel and it spools pretty fast for its size. I personally like turbos better than superchargers but I'm too cheap to switch. Plus Im not really interested in "going fast" anymore. Spent wayyyyy to much money on cars in the past. I'm happy with the car now I rather spend my money on the girlfriend or save it.
Haha yea I hear that prob why I won't get a built motor I want a house .
Old Mar 7, 2012 | 07:54 PM
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Turbos are cooler than superchargers. Which is generally accepted as true.

Though the supercharged SS is really neat, because a 2.0L 4Cyl stock with a SC is not common at all.

But "coolness" aside I think when it comes down to it, turbos get better mileage and can be used on many different platforms and engines galore is likely why they are more commonly used. As far as I know its allot more work to supercharge a 1.6L economy car than it is to turbo it. For example..
Old Mar 7, 2012 | 07:57 PM
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^ Again stupid irrelevance.
This isn't about which is better, cooler, your dick fits better into, etc. Read.
Old Mar 7, 2012 | 07:57 PM
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Originally Posted by 05Slowline
Sorry kid, this isn't about which sounds better or who prefers what sound, or which is better s/c or t/c. If that's all you have to bring to the table or you simply cannot read/comprehend the concept being discussed, you can step on the **** out the door you came in.
.
U call me a kid but yet you act like a child with your comment to me, simply put this topic has been done to death, anyone can do a search and see the difference between a turbo and a supercharger, you get on here trying to get a flame war started by insulting the "S/C Nutswings" then try to claim that this is not an attempt to start a flame war.
Old Mar 7, 2012 | 07:59 PM
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Originally Posted by Vander Nars
U call me a kid but yet you act like a child with your comment to me, simply put this topic has been done to death, anyone can do a search and see the difference between a turbo and a supercharger, you get on here trying to get a flame war started by insulting the "S/C Nutswings" then try to claim that this is not an attempt to start a flame war.
Kid, you're the only one in here being negative nancy. If you can't read and comprehend what the concept (myth) we are discussing is or are just going to continue to critique why YOU THINK the thread was started, then don't let the door hit you on the ass.
I can say turbo nutswingers also, but noone that's turbo is claiming they hit full boost whenever they go wot....
Old Mar 7, 2012 | 08:01 PM
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Turbos are way more cool

/end thread
Old Mar 7, 2012 | 08:08 PM
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i win @ 26psi


EFR 6758 instant boost! - YouTube
Old Mar 7, 2012 | 08:10 PM
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Lol was that bb?
Old Mar 7, 2012 | 08:13 PM
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Originally Posted by 05Slowline
Lol was that bb?
Brake boost? no look at the gauge it was in vac haha
Old Mar 7, 2012 | 08:15 PM
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N/A > all














Old Mar 7, 2012 | 08:15 PM
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My M62 on a 2.7 doesn't achieve full boost as soon as I mash the throttle, At 4k and WOT, Im sitting at about 16psi, As I get closer to 7K i get closer to 18-19 psi....On my TVS, eeeh its not till next week lol...



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