bgoetz

No class requirement. I've just never had any cooling requirements that stock couldn't meet.

If you want larger, search the racing/competition forum for a "mr sideways radiator".
https://www.s2ki.com/s2000/topic/940...__hl__radiator

One thing to consider with larger is the intake you want to use. Larger radiator takes up space used by some intakes. Everything is a trade off.
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I ended up ordering a Koyorad radiator from Moddiction...and a new cap, and a new fan switch, and a new shift knob, and some of those blue convex mirrors.
[attachment=95652:20160608_181137_resized.jpg]
Then I had to order some more Honda coolant and some sort of no-spill funnel that Billman says makes bleeding the air out much easier. Worst part of the install was getting 2 plastic retainers off the airbox and getting to the clamp on the bottom radiator hose. You are bent over trying to get big pliers into a small area at a terrible angle. Once I got that spring clamp turned over so I could get to it everything else was easy. Don't have the coolant or funnel yet so it is sitting. The stock radiator has a piece of foam on the front of it that fits tight against the frame - this one does not. Do I need something blocking air between that front frame piece and the radiator?
[attachment=95653:20160608_193002_resized.jpg]
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Keep an eye on that bottom one, I had a hell of a time getting a complete seal because of the angle and the way the clamp sits. I kept getting a small drip. Finally got it by working the hose on a bit further and adjusting the position of that clamp.

Popeye

...on a mini vacation

Mocky

jealous.... Popeye is always on vacation

Popeye

They say the same thing at work

Mocky

They say the same thing at work
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t777jb

...running again...maybe. The radiator is in and filled, and hopefully fully bled. I did the bleeding process a bunch of times and each time I would get just a little air out and then I would take the cap off and it was still full. I'd do it again and maybe add an ounce or two of coolant. I've put about 50 miles on it without it going over 3 bars on the temp. gauge. The heater blows HOT. I'm still nervous though - watching the gauge more than the road. If you see a NRF s2000 on the south side of Cbus, steer clear.
Side note - got an anvil 2 shift knob when I ordered the radiator - like it a lot.
Side note #2 - went and saw Sting and Peter Gabriel last night. It was opening night of their tour. I didn't have real high expectations, but it was fantastic.

JBamin

sounds like you did a good job, car can be a bit tough to bleed but if you have hot heat at idle you have done all you can do lol. you can keep your eyes on the road now.

t777jb

I bought a spill-free funnel on Amazon that is supposed to make the bleeding easy, but it didn't fit on the Koyo radiator. It did fit on the OEM radiator. The Koyo requires a different cap and the funnel kit doesn't include one in that size. Looked like it would have made the bleeding much easier though.

JBamin

i know the exact kit you are talking about. they make attachments for those kits with other cap designs.. i think in the s2000 case they make for easier clean up than anything else. because you still have to crack the bleeder on the intake manifold and sometimes on the heater tube as well.

Minicoop19

Heading to the Superfly car show tonight @ The University of Akron's Polsky parking deck. See ya there