4cyl 20 valve 1.6....possible?

freakster_991

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issit possible to have 20 valves on a 4 cyl?cuz im thinkin of replacing my 1.3L corolla engine(1987-1988) to 20valve 1.6L...dunno how many cyl...im not tat rich and this is a family car tats been passed down by my two bros who had it for 12 yrs....hence the old car.... but i see lots of tuned versions..and i hear it can go damn fast...plus it includes this thing call 4Throttle?wats tat?any info?
 

Jostyrostelli

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Yes, seat Toledo has a 1.8 20v 4 cylinder., don't know if a 1.6 could have 20v, don't know if that would be efficient.
 

andyhui01

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so 20v on a 4-cylinder means it has 5valves per cylinder?... never seen that... only seen 3 & 4valves ... I always thought 20v had to be 5 cylinder
 

freerider

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andyhui01 said:
so 20v on a 4-cylinder means it has 5valves per cylinder?... never seen that... only seen 3 & 4valves ... I always thought 20v had to be 5 cylinder

Actually, Audi has a couple of engines with 5 valves per cylinder. Starting with the 1.8 5V. They don't put the total amount of valves on there, they put the amount per cylinder.
Iu have to agree with Josty. 20v for 4 cylinders is kind of useless(to expensive), but there are manufacturers who do it. Not many, but they're there. But you could also get a 5cylinder, keep that in mind.

And here is some info about 4Throttle (try some googling): http://www.tomei-p.co.jp/_2003web-catalogue/e120_intake_4thro.html

Greetz Johan
 

andyhui01

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But you could also get a 5cylinder, keep that in mind.

those are pretty efficient.... love that 20v 5-cyl on the Volvo 850 T-5 :D

btw... is it possible to get a V5?... I kinda remember my cousin in America's Suzuki Vitara Sidekick to be a V5... or is it I5?
 

Jostyrostelli

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No V5 doesn't exist, as you might know he engine has to be in balance, 3 on the one side 3 on the other (V6).

If you have 2 cylinders on the one side and 3 on the right, the engine would shake itself apart.

Five cylinder in-line is possible, the cylinders are positioned in a line.

5-in-line
O-O-O-O-O

V6:
O| O
O| O
O| O

V5:
O| O
O| O
O|
 

freakster_991

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haha shake itself...andy u shuld know by now...oh and free rider..i i still dunt undersatnd wat it helps u do?
it increase power?or helps the car accelerate faster...it all looks like some weird jargon to me
 

pdanev

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5valves per cylinder is not proven to be better then 4 valves per cylinder, cos basically 5 valves cover the same area as 4 on the cylinder head (unless in the case of ferrari f355 where they used a differt shape, see pic below). thats why actually most of the manufacturers dont use it, makes the construction much more complex, adds lots of cost, and has hardly any (if any at all) advantage.

 

oliB

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Jostyrostelli said:
No V5 doesn't exist, as you might know he engine has to be in balance, 3 on the one side 3 on the other (V6).

Sorry, but you're wrong! :p

For example, you were able get a V5 in the Golf and Jetta/Bora.

cya
Oliver
 

freerider

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oliB said:
Jostyrostelli said:
No V5 doesn't exist, as you might know he engine has to be in balance, 3 on the one side 3 on the other (V6).

Sorry, but you're wrong! :p

For example, you were able get a V5 in the Golf and Jetta/Bora.

cya
Oliver

I can see you're confused, but these aren't actually V-shaped 5 cyl. engines.
http://www.car-forums.com/s7/t4366.html
You can also see this in the picture btw.

And freakster; I can explain it all to you, but I don't know how goog your knowledge is, so I'll give you some links (so you can learn at your own speed):
http://www.e31.net/engines_e.html
http://auto.howstuffworks.com/question366.htm (a lot info on howstuffworks.com, try searching for engines)
http://www.answers.com/topic/straight-engine

Hope it helped a bit.

Greetz Johan
 

oliB

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Like this:

O O O
_O O

Sorry, I found no pictures showing the inside of the engine...
But it's basically a VW VR6 (which is different from a standard V6 of course) with one cylinder missing.

cya
Oliver
 

pdanev

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correct me if im wrong, but as far as i know the truth is in the middle of what you guys are saying, since VR means V shaped "Reihe". so its kinda a mixture of inline and a v shape.
 

Jostyrostelli

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OliB: I think you are wrong, I can't imagine a V5...that just wouldn't make sense.
The engine would have to have a big counterweight for that one cylinder.
The setup you posted doesn't seem plausbile either, the 3 cylinders on top produce more power than the 2 below.

As far as I know V5 stands for 5th Generation. Not actual a 5cylinder in V-shape.

Altough I'm just thinking of this, if the V-shape-angle is very narrow, it could work, then it would just be like an inline 5...

Yep you were right Oli!
http://www.iht.com/IHT/GG/99/gg070999.html
http://www.car.net.au/carnet/reviews/article.asp?ArticleID=1082

You could concider this as a V5, depends what you define as a V-shaped engine.

Then it would be the same design as a VR6, that has a very narrow angle too (15 degrees) and is still called a V6.

So does that V5 have a Double Overhead Camshaft? Like a proper V6? Or does it have one?
 
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