5 valve engines...

[Wicked_Sludge]

was messing around on google and happened across this:

i guess it doesnt surprise me that someone did it, i just never knew such a thing was in production until just now. after doing some reading up, it looks like a bunch of the jap. companies, volkwagen, and a few others have all produced 5 valve engines at some point. i guess there are even a few 6 and 8 valve engines floating around...like hondas 8 valve engine they use in one of their bikes:

(best pic i could find)

a yamaha 5 valver:

anyway, just thought it was interesting.

 

[Hahnsb2]

Yeah I think either or both Ferrari and Lamborghini have made 5 valve engines.

 

[Kdawg532]

dude sludge thats freekin awesome

 

[milje]

Don't some Yamaha motorcycles use 5 valves?

 

[Wicked_Sludge]

i dont think they all do...but it seems that some of their bikes and even a few quads do...

 

[Maverick]

Toyota made a 20 valve 4AGE back in 1990 for the Corolla GTS.

 

[Southern3.0]

Yea Ive know some of the Yamaha Quads and Bikes have had the 5 Valve setup for a few years now, My buddy Just bought a WR 250 Super Moto Bike and now I'm wondering if it has it or not.

That Honda 8 valve is kinda cool though, Ive though about something like that before, I was looking at a 4.6 block and just imagined 1 big long oval piston for each bank.

I still like Ford's 3 Valve better, simpler and cheaper to produce and can make a whole lot of power.

 

[Mechanickid]

yeah my brother swapped a 91 20 valve 4AGE into his 86 corrolla. that car comes alive after 9 grand.

 

[Wicked_Sludge]

I was looking at a 4.6 block and just imagined 1 big long oval piston for each bank.

I still like Ford's 3 Valve better, simpler and cheaper to produce and can make a whole lot of power.

can you imagine how unbalanced that would be with that large of a piston moving up and down...and only 2 of them? there would be almost no bottom end power, and it would shake itself apart if you tried to rev it.

i wouldnt say the 3 valve makes a "whole lot" of power....but it IS a nice balance between 4 valve revs and 2 valve torque.

 

[94STXRanger]

I was watching the powerblock today and they were building up a 4.6 they had sleeved and bored to a 5.0. Stock block, stock crank, and stock CNC ported heads. I missed the dyno test though.

 

[triumphrider-1]

Don't some Yamaha motorcycles use 5 valves?

Titanium ones at that.

I know for sure the WR/YZF 250 and 450 (the quad 450 as well) have the 5 valve heads.

 

[fordwheelinman]

the 2 valve mod motors are soo much easier to remove spark plugs from though! (just never mind they have a habit of blowing one out of the threads from time to time)

 

[Wicked_Sludge]

a 4.6 they had sleeved and bored to a 5.0.

wow, thats like over a .1" overbore

 

[Kdawg532]

just out of curiosity how many valves (not to jack or nuthin) does a honda TRX300EX have??

 

[Wicked_Sludge]

looks like 4 valve.

exhaust:
http://www.midwestactioncycle.com/eshopprod_cat_2144-15987-16375-19254-18395_product_230728.Honda_TRX300EX_1993-2008_Exhau.htm

intake:
http://www.midwestactioncycle.com/eshopprod_cat_2144-15987-16375-19254-18395_product_230725.Honda_TRX300EX_1993-2008_Intak.htm