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Author V8s and VTEC engines
SRi_Lad
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Registered: 10th Sep 02
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30th May 03 at 16:31   View User's Profile U2U Member Reply With Quote

I know how turbos, supercharges work!
But not sure about V8, V12s etc and what the advantages are!
also how to VTECs work, is it a fuel injection???

Please can I have a sensible answer(s)

Cheers
Nismo
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Registered: 12th Sep 02
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30th May 03 at 16:34   View User's Profile U2U Member Reply With Quote

all i know is when i test drove the S2000 the vtec kicked in at 6000rpm and it felt like a turbo , sticks ya back im the seat
SRi_Lad
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30th May 03 at 16:36   View User's Profile U2U Member Reply With Quote

Yeah, I heard that VTECs have a similar feel to a turbo
Marc
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30th May 03 at 16:39   View User's Profile U2U Member Reply With Quote

wot dont u understand abt v8s?
SRi_Lad
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30th May 03 at 16:39   View User's Profile U2U Member Reply With Quote

Come on guys and gals, one of you engines boffs must know how they work!!
SRi_Lad
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30th May 03 at 16:41   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by 16vmarc
wot dont u understand abt v8s?


What is a V8? Is it the way the engine is laid out etc, what is the difference between a normal engine and a V8?
Marc
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30th May 03 at 16:42   View User's Profile U2U Member Reply With Quote

8 cylinders in a v formation naturally aspirated.
Cosmo
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Registered: 29th Mar 01
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30th May 03 at 16:42   View User's Profile U2U Member Reply With Quote

is there any decent places on the net you can read up about engines, etc??
Marc
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30th May 03 at 16:42   View User's Profile U2U Member Reply With Quote

same principal for v6
Nismo
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30th May 03 at 16:43   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Cosmo
is there any decent places on the net you can read up about engines, etc??


yesh there is Click Here
Drew
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Registered: 24th Nov 01
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30th May 03 at 16:44   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by 16vmarc
8 cylinders in a v formation naturally aspirated.


to add - 2 banks of 4 cylinders
SRi_Lad
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30th May 03 at 16:47   View User's Profile U2U Member Reply With Quote

Cheers guys, what about VTEC?

Also I take it you can add forced induction onto V8s etc!

Also are Merc kompressors supercharged engines?
l33t corsa
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Registered: 14th Aug 01
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30th May 03 at 16:50   View User's Profile U2U Member Reply With Quote

http://auto.howstuffworks.com/question229.htm
Marc
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30th May 03 at 16:51   View User's Profile U2U Member Reply With Quote

yes u can add forced induction and mercs do indeed use superchargers. A v tec works by running 12vs then when it gets to a certain rev range the other 4 valves open up. I think thats right ne way!
Lo-Ranger-w
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Registered: 12th May 02
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30th May 03 at 17:09   View User's Profile U2U Member Reply With Quote

There are a few types of vtec but i assume your talkin about the perforance enhancing engine, the vtec doesn't change the amount of valves running it controls how far the valves open up, so when the engines running fairly low rpm the vtec is not engaged, there for economical driving, when you hit vtec engagement point the valves open up wide for higher performance.. kinda tryin to simplify it for you, as the engine rpm is increased the wider the valves are open the easier it is for the engine to breath in more air/fuel mixture, also to exhale.
IntaCepta
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Registered: 25th Mar 02
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30th May 03 at 17:11   View User's Profile U2U Member Reply With Quote

'V8'
V = cylinder formation eg \''\ /''/ (V, W, flat)
8 = number of cylinders (3,4,6,8,12)
you may see W8's etc

I think VTEC is something to do with an extra camshaft??

ie There's another camshaft that kicks in (takes over, rather) after a certain amount of revs (6krpm) which allows the cylinder valves to be open for a longer period of time.
This allows more fueling + air.

guess vtec provides the best of both worlds of economy @ lower revs and performance @ higher revs..

I _THINK_ this is what it is , but not sure.

HTH
Jatinder
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Registered: 17th May 03
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30th May 03 at 17:56   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by IntaCepta
'V8'
V = cylinder formation eg \''\ /''/ (V, W, flat)
8 = number of cylinders (3,4,6,8,12)
you may see W8's etc

I think VTEC is something to do with an extra camshaft??

ie There's another camshaft that kicks in (takes over, rather) after a certain amount of revs (6krpm) which allows the cylinder valves to be open for a longer period of time.
This allows more fueling + air.

guess vtec provides the best of both worlds of economy @ lower revs and performance @ higher revs..

I _THINK_ this is what it is , but not sure.

HTH


yeah thats rite about the vtec i think isaw it on the TV
Lo-Ranger-w
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Registered: 12th May 02
Location: Milton Keynes
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30th May 03 at 18:00   View User's Profile U2U Member Reply With Quote

I am right as I own one.. so.. on engagement it moves lobes on the camshaft to change engine setup. like I said earlier.
l33t corsa
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30th May 03 at 18:02   View User's Profile U2U Member Reply With Quote


lol @ extra camshaft

http://www.leecao.com/honda/vtec/index.html
Lo-Ranger-w
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30th May 03 at 18:03   View User's Profile U2U Member Reply With Quote

lol
l33t corsa
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30th May 03 at 18:06   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Lo-Ranger-w
I am right as I own one.. so.. on engagement it moves lobes on the camshaft to change engine setup. like I said earlier.


No. The lobes don't move, well apart from regular cam rotation obviously.

read http://www.leecao.com/honda/vtec/dohcvtec.html
Stoneyginger
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Registered: 25th Jan 01
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30th May 03 at 18:10   View Garage View User's Profile U2U Member Reply With Quote

Vtec involves the 2 cam shafts however one cam shaft works to allow teh saving of fuel once you floor it and the engine hits a certain revs the second cam comes online and gives that little surge of power and it feeels soooo good
Lo-Ranger-w
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Registered: 12th May 02
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30th May 03 at 18:11   View User's Profile U2U Member Reply With Quote

it engages the high cam lobe then. lol therefore moving lobes ' effectively binding the three pieces into one ' its hard to discribe when not refering to a page on it :
IntaCepta
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Registered: 25th Mar 02
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30th May 03 at 18:11   View User's Profile U2U Member Reply With Quote

LOL! sorry, i didn't mean extra camshaft,
i meant the extra lobes on the camshaft.
the camshaft moves so that the 'other' lobes open/close the valves.
Lo-Ranger-w
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Registered: 12th May 02
Location: Milton Keynes
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30th May 03 at 18:12   View User's Profile U2U Member Reply With Quote

There are not 2 camshafts. are you actually reading the post ? jeez

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