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View Poll Results: "There's no replacement for displacement."
Agree
26
56.52%
Disagree
9
19.57%
Neutral (or it depends)
10
21.74%
No opinion/no comment
1
2.17%
Voters: 46. You may not vote on this poll

"There's no replacement for displacement." Agree? Disagree?

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Old 01-14-13 | 01:08 PM
  #61  
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Originally Posted by Outrage
All of the plumbing for a turbocharger, plus an intercooler, often times weighs more than a larger engine block would.
You beat me to it

Especially compare to a pushrod motor. Many turbo 4 set up weight the same as a Chevy small block V8. Just look at all the latest drift car, they are all running LS swap instead of the old turbo 4 that they all had. And why? Displacement!

Last edited by BNR34; 01-14-13 at 01:13 PM.
Old 01-14-13 | 01:11 PM
  #62  
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Still static mass compared to moving momentum of the extra cylinders. I must admit that a bigger engine with more cylinders gives that smoother drivability well suited for a luxury car though.
Old 01-14-13 | 01:16 PM
  #63  
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Originally Posted by ISFPOWER
no, it doesn't feel worse. maybe i was just hoping it was a drastic difference. but the e46 had instant throttle response and felt torque'r down low but the e9x is the stronger motor between the two.
0.8L high revving NA just won't make much of a drastic differences
Old 01-14-13 | 01:20 PM
  #64  
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Originally Posted by BNR34
FQ EVOs laggg like a mother...........and those are only 400 hp.

You missed my point................is ok.
You've driven an FQ? And lag compared to? Have you driven a properly tuned Evo thats 400WHP?

Maybe I missed your point, because your opinion was pointless (re: Evo) in the first place? Unless, you care to back up your statement?
Old 01-14-13 | 01:23 PM
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Originally Posted by ST430
You've driven an FQ? And lag compared to? Have you driven a properly tuned Evo thats 400WHP?

Maybe I missed your point, because your opinion was pointless (re: Evo) in the first place? Unless, you care to back up your statement?
You win, I don't care anymore. I shouldn't have post in the 1st place. My opinion was pointless, if you think about it, everything in life is pointless.
Old 01-14-13 | 01:28 PM
  #66  
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Originally Posted by SteVTEC
That's hardly a flat torque curve.

I'll see your 2-liter and raise you another liter.

BMW 3.0L N55 (twin-scroll single turbo), JB4 Stage 2.
http://www.burgertuning.com/N55_Stage2_Jb4.html

That's on a Dynocrap...RoadRace (where the other dyno figure comes from) utilizes a Mustang dyno, which is typically much lower and more indicative of WHP (as opposed to Dynocrap, which is more like bhp).

Here's an N55 with the following mods on a Mustang Dyno:

jb4 stg2 with iso running Map 5
ar 4 " nocts
bms intake
cpe chargepipe




Compare it to my custom (self) tuned Evo IX w/ intake/exhaust/DP:



My old little 4 banger has more hp and more torque (at almost the same low rpm as well)...
Old 01-14-13 | 01:32 PM
  #67  
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I can't even read that.
Old 01-14-13 | 01:32 PM
  #68  
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Originally Posted by BNR34
You win, I don't care anymore. I shouldn't have post in the 1st place. My opinion was pointless, if you think about it, everything in life is pointless.
What's your point again?!
Old 01-14-13 | 01:34 PM
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Originally Posted by SteVTEC
I can't even read that.
Read what?

Here's the original N55 Mustand Dyno post: http://www.n54tech.com/forums/showthread.php?t=18020
Old 01-14-13 | 01:37 PM
  #70  
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Originally Posted by ST430
What's your point again?!
Idk, it was pointless, there was no point

What is the purpose of life? Nobody knows!
Old 01-14-13 | 01:39 PM
  #71  
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Originally Posted by BNR34
Idk, it was pointless, there was no point

What is the purpose of life? Nobody knows!
Guess that's all we need to know about the validity of your "point"....
Old 01-14-13 | 01:48 PM
  #72  
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Originally Posted by ST430
Read what?

Here's the original N55 Mustand Dyno post: http://www.n54tech.com/forums/showthread.php?t=18020
Okay so lets put both on a Dynapack then, tune to about equal power, hold them at specific RPMs, and then time how long it takes each engine to go from completely unspooled to max torque. Slow roll in 4th gear at about 2000rpm, it'll take my 3.0L a few seconds to get up to full boost. What about a 2.0L? What about a 1.0L all at equal power levels? Then compare with a 6.0L NA with no "lag" or turbo to spool at all.

I've been giggling at these torque specs for some turbo engines including BMWs advertising maximum torque at only 1250rpm, a completely unrealistic loading situation that's never going to happen in any sort of situation with the cars unless they're being driven stupidly with manual transmissions, and HOW LONG would it take them to reach full torque at only 1250rpm, a minute??
Old 01-14-13 | 02:20 PM
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Originally Posted by SteVTEC
Okay so lets put both on a Dynapack then, tune to about equal power, hold them at specific RPMs, and then time how long it takes each engine to go from completely unspooled to max torque. Slow roll in 4th gear at about 2000rpm, it'll take my 3.0L a few seconds to get up to full boost. What about a 2.0L? What about a 1.0L all at equal power levels? Then compare with a 6.0L NA with no "lag" or turbo to spool at all.
Why a dynopack? You already have the dynosheets of both the N55 and 4G63 above? We're now nitpicking about spool and lag and not necessarily "replacement for displacement". Fact is, a 4 banger can can be tuned quite effectively to put out six cylinder HP and that's my point. Now, if the same scenario happened above on the highway, I'd downshift to get in optimal range (who wouldn't unless you don't know how to drive). Besides, if you want to see how effective "tuning" is, then you can always look at quarter mile times. I understand you guys like to diss the smaller displacement vehicles because of subjective "feel", but look at things objectively and you'll understand. Heck, the fact you praise the N55 so much instead of the S65 is a testament to that....
Old 01-14-13 | 02:21 PM
  #74  
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Originally Posted by SteVTEC
I've been giggling at these torque specs for some turbo engines including BMWs advertising maximum torque at only 1250rpm, a completely unrealistic loading situation that's never going to happen in any sort of situation with the cars unless they're being driven stupidly with manual transmissions, and HOW LONG would it take them to reach full torque at only 1250rpm, a minute??
Not just manuals, but also some automatics, both conventional torque-converter and of the automanual SMG/DSG twin-clutch type, also allow a surprising amount of engine-lugging at low RPMs without an automatic downshift.
Old 01-15-13 | 12:37 PM
  #75  
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Originally Posted by BNR34
You beat me to it

Especially compare to a pushrod motor. Many turbo 4 set up weight the same as a Chevy small block V8. Just look at all the latest drift car, they are all running LS swap instead of the old turbo 4 that they all had. And why? Displacement!
& low rpm torque & durability & reliability & cost


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