Wear. Odd shaped valves have been tried (semi-circle), but they fail pretty quickly. It’s hard to ensure that the valve seat and guide wear and/or stay lubricated correctly when the valve cannot spin.

Read “Internal Combustion Engine Fundamentals” by Heywood. It gives the full skinny. It’s sorta like....the starter’s guide to understanding ICE engines.

Mainly because a valve can rotate, plus a number of other impracticalities of machining a rectangle that needs to fully seal another rectangle.

Pippet valves seal better when all sides exert equal force. This is also the same reason why we do not have oblong pistons (I believe Honda tried this in a motorcycle racing circuit to circumvent the number of cylinder rules). The piston rings don’t exert equal force to seal the cylinder.

Because it’s a circle, you can fit more area using two smaller circles in the main circle than one larger circle.

Bigger valves actual means a smaller percentage of your surface area has an opening. Four can accommodate something like 33% more opening while maintaining wall thickness.*

Has anyone actually asked a “grid girl” or a group of “grid girls” how they feel? Objectification is easy to identify by a third party.

Unless the democrats find someone even more incompetent and unlikable than Clinton for ‘20, I think we will be alright. This last election was a situation of one party losing, not one party winning.

Either that, or we’ll ditch it in a junkyard somewhere and continue on in the Willys.

Show me one of these pictures, please? And keep in mind, we’re not talking about the location of reverse here. You may want to look at that picture again.

Rental car companies give discounts to members of all sorts of large groups - AARP, labor unions, Realtors, airline rewards members, etc. If that’s what sways just some of the organization’s millions of members to rent from them instead of a competitor, it’s worth whatever token discount if costs them.

Shep,

Shep,

Do you know what makes someone qualify for this promotion? I bought it, but on my checkout page it didn’t say anything about the BOGO card, and I’ve only received the first.

Do you know what makes someone qualify for this promotion? I bought it, but on my checkout page it didn’t say…

How do you apply the BOGO?

How do you apply the BOGO?

Ordered also, haven’t received info on the free code.

Ordered also, haven’t received info on the free code.

I tried this 30 minutes ago and still have not received my 2nd code.

I tried this 30 minutes ago and still have not received my 2nd code.

As soon as I read your comment, I knew it was written by a retard.

Playing Tank Commander™ in your car is a Michigan tradition. The faster you drive, the more the snow flies off! Giving you a sweet smoke screen.

I’m sure they can’t because of market / standards, but I always think a retro-styled, stripped out jeep would be excellent. Small side by sides run about $15k, so using that as a guide it would be cool to see what you could get in a full size jeep for that. Very CJ-esque with some modern safety (air bags, anti-locks,…

So as a former TJ owner, the thing that always kept me from taking the top off was not any difficulty in removing it, which was pretty quick, faster than this, even, as I recall (it’s been a while since I had a Jeep). The problem was how hard it was to put back ON. Not something you want to have to do at moment’s…