Question: naturally aspirated v6 vs Turbo v4
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Just a few questions:
Why does it generally seem that people prefer a naturally aspirated v6 over a Turbo v4?
If they produce the same horsepower and torque with similar fuel efficiency, is there any difference between the engines?
Has there been a lot of problems with turbos in the past?
(I am looking at the 08 TSX rumours v4 turbo compared to the IS250)
Thanks.
Why does it generally seem that people prefer a naturally aspirated v6 over a Turbo v4?
If they produce the same horsepower and torque with similar fuel efficiency, is there any difference between the engines?
Has there been a lot of problems with turbos in the past?
(I am looking at the 08 TSX rumours v4 turbo compared to the IS250)
Thanks.
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The TSX would be a V4, not an inline 4?
A couple reasons that many prefer a larger displacement normally aspirated motor over a smaller motor with a turbo are:
1. Instant throttle response -- no turbo lag
2. Longevity -- less stress on internal components.
Turbo motors are far more tunable though; you can often make big power for small money.
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A couple reasons that many prefer a larger displacement normally aspirated motor over a smaller motor with a turbo are:
1. Instant throttle response -- no turbo lag
2. Longevity -- less stress on internal components.
Turbo motors are far more tunable though; you can often make big power for small money.
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turbo 4 sucks from 0 to 30 MPh unless you rev it up on every stop, but its a blast after that.
V6 has much smoother power delivery.
I think its totally different driving styles, I personally enjoy both (my second car is a modified 2003 WRX)
V6 has much smoother power delivery.
I think its totally different driving styles, I personally enjoy both (my second car is a modified 2003 WRX)
Last edited by CyberVlad; 07-18-06 at 08:00 PM.
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I would wait if in fact they are coming out w/ a turbo tsx... If you are into performance, then the turbo will definitely be more mod friendly.
Also, on the comment about turbo lag, it will most likely have a very small turbo (much like VW's 2.0T) which has a broad torque range and maximum torque at very low rpm's.
Also, on the comment about turbo lag, it will most likely have a very small turbo (much like VW's 2.0T) which has a broad torque range and maximum torque at very low rpm's.
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I saw an interesting comparison test with a bunch of fun cars. They tested a parameter that I don't usually tested, it was something like 20-50mph. Even the fast cars like WRX and EVO were quite slow compared to other cars with a V6. For an Evo or WRX to get those impressive numbers in 0-60 and 1/4 mile I think you really need to abuse them.
~Jay
~Jay
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Originally Posted by Jay M
I saw an interesting comparison test with a bunch of fun cars. They tested a parameter that I don't usually tested, it was something like 20-50mph. Even the fast cars like WRX and EVO were quite slow compared to other cars with a V6. For an Evo or WRX to get those impressive numbers in 0-60 and 1/4 mile I think you really need to abuse them.
~Jay
~Jay
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NA engines - flatter torque curve, no sudden spikes to accidentally break traction. Better BSFC (brake specific fuel consumption) so they are inherently more fuel efficient. Can be designed to run well on lesser fuels. Very expensive to make large increases in power without forced induction.
Turbo engines - large output from small displacement. Poorer thermal efficiency, poorer BSFC, require better fuels or water/methanol injection to compensate for strong tendency to detonate. Potentially very large torque spikes over small range of rpm when turbo hits boost, can cause loss of control on corner exit if the driver is not prepared or is without electronic traction control devices. Relatively inexpensive to make large power increases until turbo performance limits are met.
That's about the whole story. As a '93 TT Supra owner, I have a little experience with boosted engines.
Turbo engines - large output from small displacement. Poorer thermal efficiency, poorer BSFC, require better fuels or water/methanol injection to compensate for strong tendency to detonate. Potentially very large torque spikes over small range of rpm when turbo hits boost, can cause loss of control on corner exit if the driver is not prepared or is without electronic traction control devices. Relatively inexpensive to make large power increases until turbo performance limits are met.
That's about the whole story. As a '93 TT Supra owner, I have a little experience with boosted engines.
Last edited by lobuxracer; 07-18-06 at 10:53 PM.
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Originally Posted by Jay M
I saw an interesting comparison test with a bunch of fun cars. They tested a parameter that I don't usually tested, it was something like 20-50mph. Even the fast cars like WRX and EVO were quite slow compared to other cars with a V6. For an Evo or WRX to get those impressive numbers in 0-60 and 1/4 mile I think you really need to abuse them.
~Jay
~Jay
The tsx will probably use the same motor found in the upcoming rdx, ~ 240hp depending on who honda wants to compete against. I think i've read that peak torque is reached @ ~4500 rpm... Which suggests that they might be using a slightly larger turbo than the vw's (peak tq @ under 2k rpm). A vw w/ a k04 turbo peaks @ ~4k rpm... Possibly some slight lag in the tsx in exchange for bigger tuning potential
As far as pros/cons, I've never heard of BSFC, but other than that, I would have to agree w/ lowbuxracer.
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Turbo cars can get off the line just as quick as a na V6... I won't go into detail, but at the most basic level, it depends on the size of the turbo and other things that may help it along, i.e., ball bearing center, etc
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turborush is correct. turbolag has a horrible reputation of being worse than it really is. a proper turbo installation can be more effective, just as reliable, and without any noticable lag when compared to a supercharger
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Originally Posted by SY300
Just a few questions:
Why does it generally seem that people prefer a naturally aspirated v6 over a Turbo v4?
If they produce the same horsepower and torque with similar fuel efficiency, is there any difference between the engines?
Has there been a lot of problems with turbos in the past?
(I am looking at the 08 TSX rumours v4 turbo compared to the IS250)
Thanks.
Why does it generally seem that people prefer a naturally aspirated v6 over a Turbo v4?
If they produce the same horsepower and torque with similar fuel efficiency, is there any difference between the engines?
Has there been a lot of problems with turbos in the past?
(I am looking at the 08 TSX rumours v4 turbo compared to the IS250)
Thanks.
Lastly, some companies have a philosophy, where they want to focus on N/A performance with certain vehicles. Superchargers/turbos are viewed as a 'crutch'...and apparently, some consumers also feel this way.
Turbo lag isn't really an issue IMO, as most makes would use smaller/effecient twins, and probably see boost as low as the 1k RPM range nowadays. Transition time has been vastly improved since the early 90s, and they can be very streetable, especially with the incorporation of new technology such as variable geometry turbos. I'd expect to see more turbo cars reaching production, while advertising the benefits of both low and high end power once this technology trickles downward.
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Turbo lag is a funny thing, I remember reading about the Syclone a long time ago, it did 0-60 in well under 5 seconds and the 1/4 mile in the low 14s, but the reviewer complained about "turbo lag"
I guess that if you don't plan carfully the power isn't always available on a turbo car. But I did take a short test drive in a Syclone and it was awesome. I really wish I had bought it!
~Jay
I guess that if you don't plan carfully the power isn't always available on a turbo car. But I did take a short test drive in a Syclone and it was awesome. I really wish I had bought it!
~Jay