silkiechic

Hi, this might not be approperate for this board but I thought I might as well go ahead and ask. Which valve is larger, the intake or exhause valve? and is it different in lets say a carborated engine? And then why is this so? Thanks.

bean_8044

The exhaust valves are larger on the JZs, but im not sure about any other engines.

SCV8

Out of hundreds of different engines, I've yet to see exhaust valve area that was larger than the intake valve area in a given engine.

JBrady

The intake valve(s) is/are always larger than the exhaust. This is due to the fact that the exhaust pressure is so much higher than the intake. The smaller exhaust is all that is needed for a given amount of intake.

Of course all Lexus engines use 2 intake and 2 exhaust valves per cylinder. The ratio is for total area.

bean_8044

Damn, i must have been looking at it backwards...

silkiechic

Thanks, I've got alot to learn about cars... so much to learn, so little time!

Diana

mikeloc24

Diana I thought you were hitting the books?? Looks like auto-mechanic books huh? lol.

silkiechic

hehe. Yeah, I am hitting the books. That was one of the questions on the final report in our enginering class. We disected an engine and put it back together. For our final report we have to explain how things work and why. That was one of the questions... ah... the insanity of the week before finals week.

mikeloc24

Sounds like a cool class. I still haven't lowered my car yet which is why I haven't sent you pics. We'll probably take pics at the meet this weekend and you can check those out. There should be a ton of cool cars there, I'm looking forward to it. Good luck with your exams

-Mike

silkiechic

Thanks, i'm gunna need all the luck in the world for calc 2 and chem. We have a saturday final for math! I won't see my car for an extra week!