TOP NA ENGINE
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yes yes.... u c something...Originally posted by f8.@Jan 9 2006, 10:11 PM
wait...
ewicong made a good point which, perhaps is plain for all, but then again, perhaps got lost in all that heat that gave no light.
he said that the max torque of the engine is related to the displacement where the hp isn't.
strictly, thats only applicable for NA engines. but yes thats a very good point.
lets take a 1.6L NA engine since its quite common and most have experienced it. the famed honda b16 dohc vtec engine pushes probably around 160hp(ball park figure) whereas a wira 1.6 probably does 110hp, if that. yet if you compare their torque figures, i'd say they are within 10% of each other. just look up the spec of any 1.6L NA be it a corolla/sentra/wira/civic etc.. even a 316.
the other factor that controls the torque when displacement is held constant is the compression ratio. of course other things like cylinder head design and config, intake and exhaust components play a role too, albeit to a more diluted extend.
yet ewicong pointed out that the hp can b e vastly different and this alludes to the question-at what rpm did these same displacement engines make their max torque?
you'd find that the higher hp ones make their peak torque later up the revs and thats the key. hp is simply the product of torque and rpm.
maybe this is not subtle but plain elementary. maybe. in which case, just a gentle review chaps.
i just knw also... torque control by displacement....
i think nowaday tat is limitation for na....
thankyou f8.....
yalo, their petro is damn cheap also......Originally posted by Redd@Jan 10 2006, 08:16 PM
LOL! dont get me wrong, i love my Alfa V6. i also loved the old VW VR6 that i had.
i basically love anything that makes a beautiful noise and has big displacement. all those small economical lumps with hairdryers attached are for suckers!
no replacement for displacement, baybee!! and in that arena, nothing beats american muscle.
too bad roadtax structure here is not big cc friendly or id be driving a mustang.
redd
"tat is america....."
totally agreed....Originally posted by E46Fanatic@Jan 11 2006, 09:10 AM
Another thing to look out for is drivability... But yeah, HP per ltr is harder to achieve when the displacement gets larger. Hence high tech wins over low tech here... There is only so much hair your can have on your chest with wonderful sounds, and big torque with a old skool pushrod engine (N/A)... All the ego and hairs on the chest gets put into perspective when a high revving V10 or V12 blows your doors off
Seriously tho.. I think Ferrari makes the best NA engine in the supercar class. They sound so hair raisingly good as well when they are tach'ed up to their redlines... Beats the rumble of push rod V8's IMHO.. but thats just my preference..
i like bmw engine also....
supergripen
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Aston Martin Vanquish S 5.9L ~ 520HP = 88hp/L
Audi RS6 4.2L ~ 420hp = 100hp/L
Lexus LS460 4.6L ~ 380hp = 83hp/L
Audi S6 5.2L ~ 420hp = 81hp/L
Infiniti Q45 4.5L ~ 340hp = 76hp/L
Chrysler 300C SRT-8 6.1L ~ 425hp = 70hp/L
Ford Mustang 4.6L ~ 300hp = 65hp/L
Dodge Viper 8.3L ~ 500hp = 60hp/L
Jaguar XK 4.2L ~ 300hp = 71hp/L
>= 4.0L
Audi RS6 4.2L ~ 420hp = 100hp/L
Lexus LS460 4.6L ~ 380hp = 83hp/L
Audi S6 5.2L ~ 420hp = 81hp/L
Infiniti Q45 4.5L ~ 340hp = 76hp/L
Chrysler 300C SRT-8 6.1L ~ 425hp = 70hp/L
Ford Mustang 4.6L ~ 300hp = 65hp/L
Dodge Viper 8.3L ~ 500hp = 60hp/L
Jaguar XK 4.2L ~ 300hp = 71hp/L
>= 4.0L
supergripen
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valvetronic and vanos technology are great as well..now we have magnesium alloy engines.next to come i heard BMW is doing advanced research on camless engines so i expect great things to come from BMW.
i know this is out of topic but i'm still waiting for the twin turbo 335i to make its appearance..k:
i know this is out of topic but i'm still waiting for the twin turbo 335i to make its appearance..
k:
E46Fanatic
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Erm.. The Z06 is a 7.0 ltr pushrod generating 505hp.. meaning a measly ~72hp/ltr from its pushrod technology (even the run of the mill Jazz Vtec has better ratios heh). Good 0-60mph times cos it reaches 60 in 1st gear, 1/4 mile is respectable...at 11.5 secs. The Enzo with less displacement @ 6 ltrs @ 651hp does the 1/4 in 10.8 secs (Motor Trend 2003).
So in terms of better N/A engine, the Enzo takes it in my books
is it???Originally posted by supergripen@Jan 11 2006, 09:14 PM
valvetronic and vanos technology are great as well..now we have magnesium alloy engines.next to come i heard BMW is doing advanced research on camless engines so i expect great things to come from BMW.
i know this is out of topic but i'm still waiting for the twin turbo 335i to make its appearance..
wah.... gd to hear tat.....
