VTEC Question

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Old Jun 8, 2005 | 12:41 AM
  #41  
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Originally Posted by EnJ
You know what would be awesome? If the blue LED's in the car turned red when VTEC engaged. Imagine how bad ass that would look at night!
Oh Damn! Nice thinking, that would be dope.
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Old Jun 8, 2005 | 12:52 AM
  #42  
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Originally Posted by crazymjb
The TLs vtec is nice, and I now understand it wouldnt work on throttle response. In addition, this is SOHC, but it still has 2 cams, one on the left one on the right. What was to gain by using sohc over dohc?
What was to gain? A big saving of $$$$$$$$$$$$$$$$.Having two overhead cams per head generally allows more power, or at least a broader (in terms of rpm) powerband for maximun BHP and torque.
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Old Jun 8, 2005 | 01:15 AM
  #43  
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Originally Posted by youngTL

VTEC is by far not useless. Power wise, you are gaining a lot. It is just spread across the board instead of a sudden jump. I think the most they could get out of the J-series 3.2L engine without VTEC was 210hp (in the Legend).

If there are two engines, identical except for VTEC, the VTEC version will get slightly better mileage because less fuel is wasted inside the cylinder on the intake stroke. Take the 2004 3.5RL and the 2005RL for example. Both engines are the J35, but the 2005 has VTEC. In terms of sheer POWER, the second engine has 75hp more (i think 65% of that is due to the separate cam in VTEC), and the 2004 is rated at 18/24, whereas the 2005 is rated at 18/26 mpg.

I agree, DOHC VTEC is far superior. I don't know what their reasoning is for not using it on the V6's is.
"compared to the DOHC VTEC".

Don't get me wrong. I'm not saying SOHC VTEC is completely useless. I know what it does, trust me. I'm just pissed that our engines don't have DOHC, and DOHC VTEC for that matter.
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Old Jun 8, 2005 | 08:36 AM
  #44  
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Originally Posted by Pure Adrenaline
"compared to the DOHC VTEC".

Don't get me wrong. I'm not saying SOHC VTEC is completely useless. I know what it does, trust me. I'm just pissed that our engines don't have DOHC, and DOHC VTEC for that matter.
the reason we don't have DOHC version is because the NSX does, i doubt they would use the same engine in both cars
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Old Jun 8, 2005 | 09:45 AM
  #45  
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Originally Posted by rbf351
the reason we don't have DOHC version is because the NSX does, i doubt they would use the same engine in both cars
Dammit, they should just drop the NSX already or give it some rediculously insane engine (go against the Honda way and twin turbo it or something).
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Old Jun 8, 2005 | 09:46 AM
  #46  
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Originally Posted by Pure Adrenaline
"compared to the DOHC VTEC".

Don't get me wrong. I'm not saying SOHC VTEC is completely useless. I know what it does, trust me. I'm just pissed that our engines don't have DOHC, and DOHC VTEC for that matter.
Okay, I finally understand what you were trying to say. Hell my car doesn't have VTEC at all. I sure wish it did. I think Honda is holding back. When the horsepower wars heat up too much, they might just start pulling out all the stops (DOHC, DOHC VTEC, maybe DOHC VTEC + IMA on the RL...)
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Old Jun 8, 2005 | 11:03 AM
  #47  
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Originally Posted by TL CHROMETIDE
what RPM does VTEC kick in anyway? its hard for me to tell because this is the only manual car i ever driven
I believe its 4700 RPM, anyone correct me if i'm wrong.
Here is a web site that explains how VTEC works. Been posted here before.
http://auto.howstuffworks.com/question229.htm.
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Old Jun 8, 2005 | 11:18 AM
  #48  
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Originally Posted by rbf351
the reason we don't have DOHC version is because the NSX does, i doubt they would use the same engine in both cars
DOHC J32 would not be the same as the C32.

Someone in the thread said it right -- it costs less. And when it comes to the largest volume engine in the Honda line-up, they would rather sacrifice a little bit of power to save money.

Let's see... MDX, Odyssey, Pilot, Accord, TL, CL, need I go on? These are all structurally the same engines, and by going SOHC instead of DOHC, they can cut down on costs and sell these cars at more competitive prices. Hell, 90% of the people who buy these cars don't even know what SOHC stands for, anyway.

Anybody feel like doing a C32 and RWD conversion?
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Old Jun 8, 2005 | 12:28 PM
  #49  
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Originally Posted by Pure Adrenaline
DOHC J32 would not be the same as the C32.

Someone in the thread said it right -- it costs less. And when it comes to the largest volume engine in the Honda line-up, they would rather sacrifice a little bit of power to save money.

Let's see... MDX, Odyssey, Pilot, Accord, TL, CL, need I go on? These are all structurally the same engines, and by going SOHC instead of DOHC, they can cut down on costs and sell these cars at more competitive prices. Hell, 90% of the people who buy these cars don't even know what SOHC stands for, anyway.

Anybody feel like doing a C32 and RWD conversion?

yes they are 2 different engines, with completly different heads, what my point was that honda isn't going to give us their top of the line 3.2 Liter engine when their "sports" car has it
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Old Jun 8, 2005 | 12:44 PM
  #50  
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I second (or third, or fourth, etc) the opinion that a 2000ish prelude with an intake & exhaust is VERY sweet when vtec hits, you can really feel it, not just hear it... makes me wonder though in that situation, if it should switch on earlier... as for vtec controllers, I know there are a/f-vtec controllers out there for other applications, possibly for the TL too (or maybe soon), but unless you have other modifications, there probably is no need to change the vtec set point..

As for a light... back in my "rice" days, not to brag , but….. I was probably one of the first people to put a VTEC light in my car (this was about the same time when I was also one of the original car PCers). You could not go to the rice shops (which were much less common back then) and buy LEDs, you could only get them from radio shack, or electronics catalogs (digikey, mouser, newark, etc). I also changed my gauges to white face (the hard way, i scanned the faces, changed the colors around in PS, printed them on sticker paper, and put them over my old faces), then i "front lit" the gauges, i put 4 blue leds and 4 red leds (one red, next to a blue) spread out over the steering column, sort of recessed into it, kinda like our blue ambient leds, i had a two potentiometers hidden under the steering column that i could reach down there and adjust the brightness individually of the red and the blue, it looked VERY awesome...

In my friend's prelude (the one i was referring to above) I wired up 4 blue leds, each hidden back behind 4 of his air vents, all of which came on when vtec engaged... it was neat

something else I did on my GSR in addition to the blue LED that came on when VTEC came on, was I put a red led right next to it when the dual stage intake manifold switched over... so at like 4500, the blue one came on, aimed at my face casting a slight blue glow on me, then the red one kicked on at like 6700 or so, i dont remember the exact RPM when the manifold butterfly actuated.... The TL also has a dual stage intake manifold (I think a more correct term in most applications would be dual stage plenum), so you could add a light for that too. On my GSR (I’ll stop rambling soon) you could not only hear VTEC, but also hear when the dual stage manifold butterfly switched over, so if you were WOT, you’d hear a sound change at 4500ish and then again at 6700ish)

and as for variable valve timing being high tech, my 13 year old maxima has it (and direct ignition like our TLs, but i must admit the valve timing on my maxima is just a valve timing adjustment, not lift).

One more note about LEDs, I have been into LED lighting for years, I first paid about $15 each for some white LEDs shortly after they first came out in the early-or mid 90s, which was shortly after when blue ones were made. The white ones, at least originally, and probably still do, work similar to a fluorescent light, it uses UV to “excite” a phosphor coating.
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Old Jun 8, 2005 | 05:36 PM
  #51  
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Originally Posted by ensley696
I believe its 4700 RPM, anyone correct me if i'm wrong.
Here is a web site that explains how VTEC works. Been posted here before.
http://auto.howstuffworks.com/question229.htm.
wow, is it really that high? if thats true then i barely hit vtec. i always shift at 3k or under, my mom says even 3k is too high.......damnit i cant wait till i get my license, this permit is killing me!
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Old Jun 8, 2005 | 05:47 PM
  #52  
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Originally Posted by youngTL
Dammit, they should just drop the NSX already or give it some rediculously insane engine (go against the Honda way and twin turbo it or something).
I agree 80k is too much to be dropping for that miniscule HP...
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Old Jun 8, 2005 | 05:49 PM
  #53  
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Originally Posted by TL CHROMETIDE
wow, is it really that high? if thats true then i barely hit vtec. i always shift at 3k or under, my mom says even 3k is too high.......damnit i cant wait till i get my license, this permit is killing me!
Yeah that sounds about right. I was going to guess 4k, but the way I drive that RPM needle is rocketing and I can't watch it instead of the ROAD!!!
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Old Jun 8, 2005 | 07:10 PM
  #54  
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Originally Posted by youngTL

VTEC is by far not useless. Power wise, you are gaining a lot. It is just spread across the board instead of a sudden jump. I think the most they could get out of the J-series 3.2L engine without VTEC was 210hp (in the Legend).

If there are two engines, identical except for VTEC, the VTEC version will get slightly better mileage because less fuel is wasted inside the cylinder on the intake stroke. Take the 2004 3.5RL and the 2005RL for example. Both engines are the J35, but the 2005 has VTEC. In terms of sheer POWER, the second engine has 75hp more (i think 65% of that is due to the separate cam in VTEC), and the 2004 is rated at 18/24, whereas the 2005 is rated at 18/26 mpg.

I agree, DOHC VTEC is far superior. I don't know what their reasoning is for not using it on the V6's is.
The 2004 RL engine was not a J series engine. It debuted in '96 on the RL and was was an enlarged legend engine with the 'wide angle' V. This was designed to be mounted longitudially not transversly. FWIW, the Legend V-6 is the same basic block that is still in use in the NSX (only this has Twin cams).
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Old Jun 8, 2005 | 07:13 PM
  #55  
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Originally Posted by ndx2
yeah... even GM's got variable valve timing... that's proof enough that it's old news.
I hope you're not refering to the Saturn Vue... cause this is a Honda engine. If not, and GM has a in-house designed variable valve timing engine, I will bet that it doesn't vary valve LIFT and DURATION! VTEC works so well because it varies timing, lift and duration.
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Old Jun 8, 2005 | 09:23 PM
  #56  
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I would like to see the NSX power train in the TL, like how they made and IS430 on rides. How much more would it cost if our TL had the DOHC Vtec?
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Old Jun 8, 2005 | 09:42 PM
  #57  
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Originally Posted by Colin
I hope you're not refering to the Saturn Vue... cause this is a Honda engine. If not, and GM has a in-house designed variable valve timing engine, I will bet that it doesn't vary valve LIFT and DURATION! VTEC works so well because it varies timing, lift and duration.
no, i was actually thinking about the cadillac engines. 3.2 litre & the 4.6 northstar. they both have vvt. there may be other engines i'm overlooking, too.
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Old Jun 8, 2005 | 09:53 PM
  #58  
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The VTEC engagement is so quiet on my TL. I swear I can't feel the vtec engage but I know it's working because the speedo just starts climbing like mad. On my friends Celica GT-S the car will jerk when the VVT-i engages.
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Old Jun 8, 2005 | 10:03 PM
  #59  
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Originally Posted by Russdaddy
The VTEC engagement is so quiet on my TL. I swear I can't feel the vtec engage but I know it's working because the speedo just starts climbing like mad. On my friends Celica GT-S the car will jerk when the VVT-i engages.
Time to get a CAI! you'd have to be deaf to not hear the sweet sound of VTEC with one. did i mention it sounds sweet? oh so sweet.
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Old Jun 9, 2005 | 10:48 AM
  #60  
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Originally Posted by Russdaddy
The VTEC engagement is so quiet on my TL. I swear I can't feel the vtec engage but I know it's working because the speedo just starts climbing like mad. On my friends Celica GT-S the car will jerk when the VVT-i engages.
As opposed to the speedometer just stopping if VTEC weren't there?

Come on, people. VTEC helps, but it's not a turbocharger. Get real.
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Old Jun 9, 2005 | 10:59 AM
  #61  
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Originally Posted by Colin
The 2004 RL engine was not a J series engine. It debuted in '96 on the RL and was was an enlarged legend engine with the 'wide angle' V. This was designed to be mounted longitudially not transversly. FWIW, the Legend V-6 is the same basic block that is still in use in the NSX (only this has Twin cams).
Yep, it was the C-series. There are several variations of the C-series, most notably the C32 in the NSX w/ DOHC heads. Longitudinally mounted, yes, but I think the NSX is the exception.
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Old Jun 9, 2005 | 01:11 PM
  #62  
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Originally Posted by Pure Adrenaline
Yep, it was the C-series. There are several variations of the C-series, most notably the C32 in the NSX w/ DOHC heads. Longitudinally mounted, yes, but I think the NSX is the exception.
Oh yes, longitudially mounted in the 91-95 Legends, 95-98 3.2 TLs and 96-2004 RLs.. The NSX is transverse.
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Old Jun 9, 2005 | 01:38 PM
  #63  
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Originally Posted by Pure Adrenaline
As opposed to the speedometer just stopping if VTEC weren't there?

Come on, people. VTEC helps, but it's not a turbocharger. Get real.
Honda folks need love too.

Originally Posted by Pure Adrenaline
DOHC J32 would not be the same as the C32.

Someone in the thread said it right -- it costs less. And when it comes to the largest volume engine in the Honda line-up, they would rather sacrifice a little bit of power to save money.

Let's see... MDX, Odyssey, Pilot, Accord, TL, CL, need I go on? These are all structurally the same engines, and by going SOHC instead of DOHC, they can cut down on costs and sell these cars at more competitive prices. Hell, 90% of the people who buy these cars don't even know what SOHC stands for, anyway.
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Old Jun 9, 2005 | 01:49 PM
  #64  
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Originally Posted by Colin
The 2004 RL engine was not a J series engine. It debuted in '96 on the RL and was was an enlarged legend engine with the 'wide angle' V. This was designed to be mounted longitudially not transversly. FWIW, the Legend V-6 is the same basic block that is still in use in the NSX (only this has Twin cams).
I stand corrected.
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Old Jun 9, 2005 | 01:52 PM
  #65  
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Originally Posted by Colin
Oh yes, longitudially mounted in the 91-95 Legends, 95-98 3.2 TLs and 96-2004 RLs.. The NSX is transverse.
This is somewhat , but what series is the 2.5L that is longitudinally mounted in my 2.5TL?
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Old Jun 10, 2005 | 01:12 AM
  #66  
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Originally Posted by ndx2
Time to get a CAI! you'd have to be deaf to not hear the sweet sound of VTEC with one. did i mention it sounds sweet? oh so sweet.

To be honest I'm busy jamming to my tunes all of the time. I'll turn the radio down next time!!
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Old Jun 10, 2005 | 01:13 AM
  #67  
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Originally Posted by Pure Adrenaline
As opposed to the speedometer just stopping if VTEC weren't there?

Come on, people. VTEC helps, but it's not a turbocharger. Get real.

That statement made no kinda sense........
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Old Jun 10, 2005 | 11:34 AM
  #68  
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Originally Posted by Russdaddy
That statement made no kinda sense........
How about that?
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Old Jun 12, 2005 | 11:41 AM
  #69  
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Originally Posted by Pure Adrenaline
How about that?
How about that? You gotta be kiddin'!!!

The reason I made that statement to you was because your response was retarded.

I was really trying to make a good comment about how smooth the vtec kicks in on my TL compared to my friend's Celica and my B16 civic. I assumed that since you have a TL you would have known that, but I guessed wrong (my bad). Sorry if I didn't state that in my first post before but I figured you would have caught that.
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Old Jun 12, 2005 | 12:12 PM
  #70  
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Originally Posted by Russdaddy
How about that? You gotta be kiddin'!!!

The reason I made that statement to you was because your response was retarded.

I was really trying to make a good comment about how smooth the vtec kicks in on my TL compared to my friend's Celica and my B16 civic. I assumed that since you have a TL you would have known that, but I guessed wrong (my bad). Sorry if I didn't state that in my first post before but I figured you would have caught that.
PA doesn't like people (i.e. ricers) who think VTEC/VVT-i/etc are the shit... like um... "man, if my vtec kicked in, i would've owned you in that race"

but the rest of us understood your original post the way you wanted us to. no biggie.
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Old Jun 12, 2005 | 02:15 PM
  #71  
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Originally Posted by ndx2
PA doesn't like people (i.e. ricers) who think VTEC/VVT-i/etc are the shit... like um... "man, if my vtec kicked in, i would've owned you in that race"

but the rest of us understood your original post the way you wanted us to. no biggie.
I don't think many of us think that way. Variable valve timing and lift control are very useful things to have on an engine, at least compared to engines without them. It's pretty much a power and economy gain for free. That is why they're excellent. But I understand what you mean about ricers thinking that it's the coolest thing ever. I see it as one more thing my appliance has to make my life easier. Oh wait, but my car doesn't even have it!
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Old Jun 12, 2005 | 02:35 PM
  #72  
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oh i definitely agree with you. VTEC certainly gives the j32 more power that's noticeable. i was just trying to explain PA's take, as there seems to be some misunderstanding between the two (PA and Russ).
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Old Jun 12, 2005 | 04:04 PM
  #73  
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Originally Posted by youngTL
This is somewhat , but what series is the 2.5L that is longitudinally mounted in my 2.5TL?

I'm not to sure what engine series the SOHC 2.5 was, but it started life in the US in the Vigor and continued into the first generation TL (2.5). There is a DOHC VTEC 2.0 liter version of this engine somewhere that was being tested for possible usage in the SSM. This was eventually dropped in favor of the F20C when the car went into production as the S2000.
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Old Jun 12, 2005 | 07:45 PM
  #74  
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Originally Posted by Russdaddy
How about that? You gotta be kiddin'!!!

The reason I made that statement to you was because your response was retarded.

I was really trying to make a good comment about how smooth the vtec kicks in on my TL compared to my friend's Celica and my B16 civic. I assumed that since you have a TL you would have known that, but I guessed wrong (my bad). Sorry if I didn't state that in my first post before but I figured you would have caught that.

When you said "my speedometer climbs like mad when VTEC kicks in", I thought you were another one of those guys who takes VTEC to the extreme. For instance, I've had people say stuff like "once I hit VTEC, I'll run away from you." Hence my retort regarding how VTEC isn't like a turbocharger or anything. But I understand your intention of the post now. It's all good.

And you didn't assume wrong. I do have a TL, but it's not a 3rd gen.
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