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Old 12-17-2003, 05:53 AM   #1
vwhobo
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What Do You Want To See...

What do you want to see, besides naked ladies? The Gearhead Garage is for you the Car-Forums community, so please post your ideas for upcoming topics. Thanks. :idea: :idea: :idea:
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Thanks for the pic, jedimario.

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Old 12-18-2003, 02:29 AM   #2
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a lot of people dont know anything about some of these... so il just list a bunch of stuff: (plus i may learn somestuff )

>vtec
>forced induction (both turbo and supercharger)
>clutch (cable and hydrolic)
>tranny
>rotoray (good fun)
>and more i cant think of right off the bat
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Old 02-29-2004, 05:51 PM   #3
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Quote:
Originally Posted by mazda6man
a lot of people dont know anything about some of these... so il just list a bunch of stuff: (plus i may learn somestuff )

>vtec
>forced induction (both turbo and supercharger)
>clutch (cable and hydrolic)
>tranny
>rotoray (good fun)
>and more i cant think of right off the bat

ill second the rotary, unless its already been addressed.
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Old 03-07-2004, 08:54 PM   #4
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The stuff vwhobo did on horsepower and the cooling system was great.. but i'm left wondering how long he took to type it if it took me that long to read it.. The rotary engine would b a great topic.. How about electronic torque biasing differentials, 4wd systems and ECM’s? It might not b so technical but could you cover the issues of preparing your car to do racing at weekends etc? i.e. safety and weight saving ideas? Not that my ideas are any good or anything, but maybe you could extend the topics to cover driving techniques as well….? Cheers.
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Old 03-07-2004, 10:26 PM   #5
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Quote:
Originally Posted by R34RB30DETTV
The stuff vwhobo did on horsepower and the cooling system was great.. but i'm left wondering how long he took to type it if it took me that long to read it.. The rotary engine would b a great topic.. How about electronic torque biasing differentials, 4wd systems and ECM’s? It might not b so technical but could you cover the issues of preparing your car to do racing at weekends etc? i.e. safety and weight saving ideas? Not that my ideas are any good or anything, but maybe you could extend the topics to cover driving techniques as well….? Cheers.

The hobo loves nothing more than to peck away on his keyboard. His next favorite thing would be, is to have a sawbriar, or rose bush drawn across his ass. I would say he did not and does not sit down and type all of his technical posts, at one setting,(MS Word is a wonderful thing) after getting all the crap from some of our more mature members(12-16yr olds) of this forum, why does he even stay in here? Hell,I guess he cares. This is in NO way directed to you,R34. I just get so tired of some of these little morons that don't appreciate a DAMN THING that you try to give them!!!! "It's all about "ME right NOW" I'm very calm now. SJ,BW, you don,t have to lock this

Retract the 12-16 yr olds, to only inclued the immature pricks.
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Last edited by lectroid : 03-07-2004 at 10:30 PM.
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Old 03-07-2004, 10:33 PM   #6
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Quote:
Originally Posted by lectroid
I'm very calm now. SJ,BW, you don,t have to lock this

I was so tempted to close this thread...and then you ended with the above.


Come on...
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Old 03-15-2004, 09:28 PM   #7
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Loved the read Hobo...

Quote:
Originally Posted by mazda6man
a lot of people dont know anything about some of these... so il just list a bunch of stuff: (plus i may learn somestuff )

>vtec
>forced induction (both turbo and supercharger)
>clutch (cable and hydrolic)
>tranny
>rotoray (good fun)
>and more i cant think of right off the bat

I couldn't agree more with the above list. Not to concerned with VTEC as I think it is nothing more the variable timing used to increase economy. I could be wrong and it wouldn't be the first time. If I'm right... I think its funny how certian generations think VTEC is some kinda high performance design.

Anyways, I would also love to learn about rear-ends. Before anyone else says it, I'm not talking about human rear-ends. Just want to put the nix on that one. But, what exactly is a 3.55 and how does it differ from a 3.31? Pros and cons etc.

Also gear ratios? Final drive ratio and such. Just some ideas.
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Old 03-15-2004, 09:46 PM   #8
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aagh Sarge your avatar is getting me confused...when you post i think its Lectroid

but yeah i agree - im curious about the whole drive ratio thing.
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Old 03-15-2004, 09:51 PM   #9
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Quote:
Originally Posted by SuperJew
aagh Sarge your avatar is getting me confused...when you post i think its Lectroid

but yeah i agree - im curious about the whole drive ratio thing.

I must confess, I stole it from Lectroid. LOL
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Old 03-18-2004, 10:30 PM   #10
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Quote:
Originally Posted by USAF-Sergeant
I must confess, I stole it from Lectroid. LOL

ALRIGHT you avatar thief I'm proud that you took it It's as much yours as it is mine. My youngest brother is in the Air Force and just received the SNCO of the year award. Be smart, be safe.
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Old 03-15-2004, 10:39 PM   #11
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Quote:
Originally Posted by USAF-Sergeant
I couldn't agree more with the above list. Not to concerned with VTEC as I think it is nothing more the variable timing used to increase economy. I could be wrong and it wouldn't be the first time. If I'm right... I think its funny how certian generations think VTEC is some kinda high performance design.
i hate to say it, but the VTEC system is a high performance system, although you are right about it being a fuel saving idea too..i will explain it in greater detail at some other time. is it ok Vwhobo/bav/SJ (moderators generally?) if i post something on the VTEC system? its about 2000 words long and i should confess that it is not my own work, but it is very informative and useful..
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Old 03-15-2004, 10:45 PM   #12
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Quote:
Originally Posted by R34RB30DETTV
i hate to say it, but the VTEC system is a high performance system, although you are right about it being a fuel saving idea too..i will explain it in greater detail at some other time. is it ok Vwhobo/bav/SJ (moderators generally?) if i post something on the VTEC system? its about 2000 words long and i should confess that it is not my own work, but it is very informative and useful..

Make sure you give credit to the author...but if you could, just post a link if you can...makes it easier IMO.
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Old 03-15-2004, 10:54 PM   #13
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sorry, i only got the writing, can't remember the website...! "The engineer Giovanni Torazza, at Fiat, conceived and developed a valve operating mechanism that does everything to ensure that the engine should combine the best features of the most rabid and most restricted of conventional types.

The essence of the Fiat Torazza engine comes from early developments announced in 1970 by General Motors who had been experimenting with intake valve throttling. Here, the pivoting rocker levers of an otherwise fairly conventional pushrod engine were given movable fulcra enabling the intake valve lift to be varied. The object was to correct the cyclic variations of cylinder pressure suffered by a conventional engine digesting very weak mixtures. By minimising the vavle lift so as to create the smallest possible opening for the load applied, and thus maintain the full pressure drop across the port, the velocity of the incoming charge is kept up to the speed of sound. The droplets of petrol passing through the port undergo almost explosive atomisation in these circumstances, resulting in fast and consisten combustion immediately after ignition, even when the engine is running lean at part load.

The object, as might have been guessed from the date of the announcement, was to reduce toxic emissions in the exhaust. Torazza took the idea further, arguing that the possibility of changing both intake and exhaust valve opening duration and lift as a function of speed and load must be even more attractive. The essential mechanical features were an oscillating cam driven by an eccentric and connecting rod, and finger follower in an arc swung from the cam's centre of oscilllation, timing and lift were altered simultaneously - lower lift and softer timing in one direction, higher lift and sportier timing in the other. The typical valve opening variation in lift amounting to 37 per cent. Control was effected hyraulically through a three dimensional cam moved axially in response to engine speed and radially to inlet manifold depression.

The snag encountered by General Motors with their intake valve throttling was that in light-load running, when valve lift was very small, despite the high airflow velocity across the seat there was not enough movement upstream in the induction tract to support the droplets of fuel sprayed by the carburettor jet or conventional injector nozzles. This objection could be overcome by the truly atomised mist produced by Petrol Injection Limited as a more acceptable successor to their earlier Tecalemit-Jackson equipment. However, engineer Torazza has not reported any such difficulties, on the contrary finding no increase in the engine's tendency to detonation despite evidence of a leaning out of the mixture. This he thought might be due to an improved mixing of fuel and air downstream from the carburettor, as well as to the higher gas velocities across the valve opening annulus.

The experimental results verified by Fiat for the Torazza engine are wholly encouraging. An increase of bmep of over 30 per cent is realised at low speeds, drooping to 5 per cent at high engine speed where the size of the inlet and exhaust passages is the controlling factor. We should bear in mind that the conventional engine with which it was compared was camshafted for optimum performance in a regime between 60 per cent and 90 per cent of maximum power speed. It is worth mentioning that the whole arrangement was simply superimposed on normally-produced four-cylinder Fiat car engines, in one case with inclined opposed valves in the standard hemispherical combustion chamber, and in the other with in-line valves in the standard wedge type combustion chamber.

Other points to note were that the specific fuel consumption was improved and that valve gear noise was no greater than in the standard production engines. No abnormal vibrational fatigue was observed in the valve springs or the kinematic system, nor any abnormal wear in any enigne component after 600 hours testing, much of which was at maximum power and at overspeed.

Inevitably such mechanism is more costly than the normal arrangement because of a greater number of components demand more production operations and more complex assembly. A study of the torque characteristics of the engine make it clear, however, that if the unit is designed ab initio for this variable timing system, the increased cost may be compensated by the better performance and the possibility of reducing the engine displacement or, more probably, the number of transmission ratios and thus the overall weight of the power train. There are more possibilities inherent in the system, notably that of obtaining better mixture homogeneity through valve throttling at part-load and an internal exhaust gas recirculation by means of negative valve overlap. Moreover, some of the characteristics offered by this variable valve-gear may be of value not only in competition engines but also in the diesel and multifuel field: chief of the attractions is the possibility of increasing the engine's breathing capacity and turbulence throughout its speed and load range, and the possible improvements when starting at cranking speed."

Honda has improved on Torazza's original idea in the 20 years between his engine, and VTEC. VTEC varies the lift and timing by having two sets of rocker arms. The first operates directly on the valve, riding on the lower lift cam lobes. The second set ride on the higher duration lobes. In order to engage the higher lift a set of pins lock the first and second sets of rockers together forcing them to operate on the higher lift lobes. Although the engagement is mechanical, the pins are operated by a hydraulic selunoid. This is activated by the engine's computer which measures oil pressure, engine tempature, throttle postion, and many other things. When the engine is cold, VTEC will not engage to avoid potentially damaging the engine parts.
...and there we have the VTEC system.. hope that was helpful and informative.. and i give credit to the author, who ever you may be..
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Old 12-18-2003, 02:31 AM   #14
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Thanks, I'll put those on the wish list.
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Old 12-18-2003, 02:34 AM   #15
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right on , this place wil probably be my second school, haha
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