VVTi
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thrash wrote:
Part of what you're missing is that most variable valve timing systems don't have a "cross over point". The reason that **** is very pronounced is because it is a dual-cam-profile system - you're either on the hot cam or the cold cam. I don't know if more modern **** systems do cam phasing in addition to the profile-change over (i don't think early **** did that but i'm frankly not an expert or a honda historian
)With a VANOS system, and probably most cam phasing systems, you won't feel any sort of "step function" at all - the motor will just be making more torque than a non-adjustable engine with that cam grind would be at the same RPM and load.
What would you call it if there was no change over ...
Click here to see Video -
HAHHA wannabe.....seems like it fits... i tell you what, not only would i not race nicks car on the street, i am not sure i wanna ride in it on the highway ever again. You seriously have no fuckin clue. I have read this whole tread, and all i see is you not gettin the point here. And as far as that last video, that depicts a honda going from "Super Economy Mode" to "Regular Economy". I have seen NA LS Motors ass rape **** Motors. Why, cuz fuckin **** has nothing to do with the performance of the car. All you are doing with **** is waiting longer for what little extra power you may recieve. Nicks car never hits crossover cuz it is always on the big lobes.
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so nicks cars is fast cuz its always in **********!?!?
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bader3245 wrote:
HAHHA wannabe.....seems like it fits... i tell you what, not only would i not race nicks car on the street, i am not sure i wanna ride in it on the highway ever again. You seriously have no fuckin clue. I have read this whole tread, and all i see is you not gettin the point here. And as far as that last video, that depicts a honda going from "Super Economy Mode" to "Regular Economy". I have seen NA LS Motors ass rape **** Motors. Why, cuz fuckin **** has nothing to do with the performance of the car. All you are doing with **** is waiting longer for what little extra power you may recieve. Nicks car never hits crossover cuz it is always on the big lobes.
Ok, so your telling me that an LS motor has more potential than say an ITR motor? ask any NA honda guy and see what they say... -
Why would anyone ever boost/buiild ITRs or GSRS or B16s if LS's were sooooo much better? they are half the price of a b16 and 1/8 the price of an ITR motor? I suppose a b16 civic Could ass rape a car with a 2JZ, but that doesnt mean a b16 is a better motor than it...
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I'd put an LS motor in a hatchback before a b16 any day of the week.
I suppose you think the fast all motor guys still use **** too haha.
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integra_gsr98 wrote:
I'd put an LS motor in a hatchback before a b16 any day of the week.I suppose you think the fast all motor guys still use **** too haha.
but would you rather put a LS motor than a GSR/ITR swap? I agree b16s are pretty much worthless. but all **** motors are not... -
wannabe wrote:
Why would anyone ever boost/buiild ITRs or GSRS or B16s if LS's were sooooo much better? they are half the price of a b16 and 1/8 the price of an ITR motor? I suppose a b16 civic Could ass rape a car with a 2JZ, but that doesnt mean a b16 is a better motor than it...Wow....I knew School started today, but you sir need a special lesson... you make NO SENSE.... Variable whatever you wanna call it is for driveability, and driveability only. For example, the new Vipers have Variable Valve timing ONLY so they can slip past the EPA's gas milege rules. I will be here all night incase you think of a good point, but all you do is talk about things that have no meaning. Research and Experience OWN JOO!!
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PSiedTSi wrote:
Joel, that has to do with more than JUST v-t-e-c. The ENTIRE motor design is important.
I never said anything about V-T-E-C in this thread... other than the fact that it is superior in performance to most if not all of the other car companies Variable Valve Timing attempts -
bader3245 wrote:
Wow....I knew School started today, but you sir need a special lesson... you make NO SENSE.... Variable whatever you wanna call it is for driveability, and driveability only. For example, the new Vipers have Variable Valve timing ONLY so they can slip past the EPA's gas milege rules. I will be here all night incase you think of a good point, but all you do is talk about things that have no meaning. Research and Experience OWN JOO!!
I dont know who your arguing with that V-T-E-C is the only thing that makes honda motors good, but you are wasting your time. Read above post for the only thing I attempted to post in this thread... -
wannabe wrote:
other than the fact that it is superior in performance to most if not all of the other car companies Variable Valve Timing attemptsare you serious? how is infinately adjustable not better?
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MisterCMK wrote:
Real men just run agressive cams all the time.remember you said that...
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thrash wrote:
I beleive on the V8 in the E65 745Li (the current 7 series body style).. so around 2002 or so?I don't know which other BMW engines feature Valvetronic.
None of the M engines do - BMW has stated that thus far, Valvetronic isn't responsive enough for their M car engines - which all rev to 8000+ rpm now
(8000rpm for the M3 / Z4M, and 8300 for the M5/M6)sounds to me like its real high performance...
Back to the point
- GSR's car is crazy fast and has too many traction problems to run real fast or race on the street, i think the ricers are jealous
- cept honda, makers use VVT for driveability
- your all ricers
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According to BMW, Valvetronic engines have a 15% power (or 15% mileage, depending on which way you swing) advantage over the equivalent motor without valvetronic.
A 15% power boost and complete elimination of the throttle assembly is nothing to sneeze at.
M engines (except the S50 from the USA E36 M3) run ITB's anyhow. IIRC, it takes 200ms for the valvetronic eccentric to adjust through the full range of motion. For most people, that sort of latency is acceptable (hell, most people drive automatics), but for the motorsport engines, BMW apparently decided it was not.
If you're knocking the technology because in its very first iteration, BMW opted not to put it on some of the highest rated, highest performing stock engines in the world, that's cool, but I wonder what automotive engineers would say about your engine designs ?
If you're just being "clever", that's cool too
Since you're being argumentative - how is that honda doesn't use VVT for drivability? Why not just run the hot cam profile all the time?
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