What is a 3 valve engine?

[Synned]

I don't understand how there can be a such thing as 3 valves per cylinder. I understand 2 (1 for exhaust 1 for intake) and 4 (2 per), but how does 3 work? Sorry if this is a stupid question.

 

[DFG 5OH]

2 intake 1 exhaust

 

[Synned]

Gotcha..thanks

 

[DFG 5OH]

:d

 

[WhiteDevil]

Yeah they just put an extra lob on the cam to control the extra intake valve and voila more power.

 

[pleasehelp]

How is 3 better than 4??

 

[super302]

How is 3 better than 4??

its not

 

[pleasehelp]

Then why doesn't Ford use the on the GTs?

 

[WhiteDevil]

Then why doesn't Ford use the on the GTs?

Silly rabit 4 valves are for cobras

 

[SeventyMach1]

Well, if he's talking about the "Ford GT" .... then they DO use a 4 Valve. The new "Mustang GT" has a 3 Valve, like the edge Mach 1's. And as John said, Cobra's have 4 Valve motors as well.

 

[pleasehelp]

I meant the mustang gt. Why don't they just use 4 valves (dohc) instead of 3 valves? Same with the Explorer.

 

[1105]

4 valves = more moving parts which = more things that can go wrong which = a lot of $$$ to spend to fix. Plus its probably not needed. I thought most of the 3v engines were 1 intake 2 exhaust

 

[94GTMOOSE]

i thought it was an issue with keeping back pressue up. thought i read an article that said that. might be mistaking. i will look at the mag later while i am pooping

 

[Synned]

So when we rebuild our engines, (HCI), is it impossible to fit 3 lobes per cyclinder with a pushrod engine. I'm assuming so, or else wouldn't there be 3 valve heads for 5.0's. Or is there other problems.

 

[1105]

You'll need an extra lifter, rocker, and pushrod for each cylinder, along with a new block that could accept all of thoes parts.

 

[hauoli63]

i thought it was an issue with keeping back pressue up. thought i read an article that said that. might be mistaking. i will look at the mag later while i am pooping

Someone should start a poll about who does or doesn't keep magazines (not Playboy!) in their bathrooms!

 

[bjl95mustang]

Someone should start a poll about who does or doesn't keep magazines (not Playboy!) in their bathrooms!

Who dosent???

 

[CManT1914]

So when we rebuild our engines, (HCI), is it impossible to fit 3 lobes per cyclinder with a pushrod engine. I'm assuming so, or else wouldn't there be 3 valve heads for 5.0's. Or is there other problems.

You'd need a whole new motor. The block would need 8 extra pushrod holes in it.

 

[WhiteDevil]

So when we rebuild our engines, (HCI), is it impossible to fit 3 lobes per cyclinder with a pushrod engine. I'm assuming so, or else wouldn't there be 3 valve heads for 5.0's. Or is there other problems.

No we drive cars that have a PUSHROD OHV set up. Those 3v motors are modular motors OHC(over head Cam) very different from ours.