Bliss

Circumference larger you will travel farther in each revolution. Lot of other factors to consider when chosing wheel size. weight, .. But the overall wheel height/dia of is part of your final gear ratio.
There has been test on same car changing out rear tires with different dia 16, 17, 18, Zero to 60 The smaller dia accelerates faster by a small amount .1 sec or so. Larger wheels ride better and go further each rev thus faster overall speed. Kinetic energy and enertia play a big factor in all this also. To me go with what you like and removing weight seems to be more of a plus than dia. I like the stock setup.

The air lid stays on my s I trust the advice here and it looks better. I did gut the inners though.

SpitfireS

Lets get truck tires then...
I think that's what I said.
Hmmm... also sounds a lot like what I said.
If the engine is strong enough, especially in 6th.
18" wheels put more "heavy" material at a larger radius from the centre, IOW create more inertia, make it harder to speed up the wheel.
Going from the OEM 16" 5-spoke to JDM 16" 6-spoke forged wheels I also notice it a little bit.
Light wheels with most of the mass close to the centre is best.


In case of airbox lid:
You can always go RadMat.



Proven to work.
IAT sensor readings taken during DD show the IAT is lower in traffic and drops faster when the speed goes up again.
But it looks kinda....
Allthough you do not see it with the hood closed.

arsenal

There was a member of Honda-tech whom actually took temperature readings while moving which showed that above a certain speed, the difference in temperature between the lid on or off was less that 10*.

There is enough air moving around the box at that speed that the radiator does not pose a significant threat to IAT's.

Not disputing Billman, but there are too many variables. 12hp - 16hp is rather a large loss, considering that the K&N adds power...

The only time I noticed a vast difference was in stop and go traffic.

Best thing to do is try it yourself, or get on the dyno with some big fans and close the hood

jimi

Bottom line....put a lid on it

s2000Junky

It’s not just the IAT increase with the lid of the intake, it changes the flow character, its a tuned intake. When you pull the lid of you are disrupting this on a stock tuned car. I’ve played around with this in the past like every other S owner back in the day, and you can indisputably feel the difference, the car feels sluggish, there is no more kick in vtec, it just doesn’t pull like it does with the lid on. Feels like your on the primary cam all the way to redline.

Bliss

spitfireS was just making coment on your post I dont disagree with you. Just making coment on the trivial subject of wheel dia.

Utah S2K

Two more points.

1) The 18" posts here are pure BS. The AP1 came with a 16" wheel. If you go 17" it is known as +1, 18" is +2, etc. The tires that go on these wheels have correspondingly reduced sidewalls. The overall diameter of the wheel tire combo remains the same. A +2 18" set up has a smaller sidewalls, is stiffer, and therefore more responsive. This is the reason many use them for racing. For street use the +2 can be problematic, mostly related to cracked wheels from pot holes. I run 17's as a best of both worlds approach.

2) In the future try posting a request in Wanted to Buy for a part like an air filter cover. Many were removed within days and are available for cheap if not just shipping charge.

Utah

SpitfireS