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And: 4) Separate coolers for transmission fluid Also we can't forget all these race cars don't have ACs. It's the single most effective cooling mod. The AC condenser sits in front of the radiator and increases the total air resistance - a lot less air travel through the engine bay because of...

Thanks for this. A few guys are running racing slicks in their fk8s. A local guy is using yoko A005 in his FL5 too. I also remember reading that honda stiffened the front suspension of the FL5 to increase camber stability on higher loads. I guess it should be safe with some hard slicks - you...

That hose leaving the cylinder head seems to be a PCV hose leading to a catch can, located where the stock battery goes. Race cars usually don't use closed loop systems for blow-by gases. The catch can seems to be venting to atmosphere. My race car has one just like that. After a trackday it's...

JDM doesn't have that sensor, it seems it only comes installed on EU cars. It's a proper oil temp/level sensor, but our car uses a different harness that lacks the required connection. From what I can tell, the EUDM Type R only cares about the oil level readings; the oil temp reported by LogR is...

There are very few cases of OEM bypass valves failing that I know of, and people have been running higher boost since a tuning solution first came to market. The R660 turbo used to require OEM bypass valves and wastegate actuators. Now they are selling a piston bpv that comes with their kit. The...

Sorry, in your build thread you mentioned 126 degrees and my dumb head assumed it was Celsius. Can 126 F be correct? In normal operation, just idling, your car should see oil temps of at least 90 C/194 F. The thermostat on the sandwich plate would open, but the oil cooler wouldn't really cool...

I see you changed your handle! I just saw a video of your car. What are those lug nuts you are using? Rays dura nuts? Are you using them at the track?

I don't think it has upgraded fuel rail lines. It seems just like our car without the red cover on. Yeah that aluminum foil hahaha Those hoses are interesting indeed. I have never seen flexible hoses like those (usually used for brake ducts) being used inside the engine bay. And I have seen my...

I believe it's mostly because of the headifold design. It absorbs just too much heat from the exhaust gases. Honda always underestimated the rejected heat of this engine. A similar powered german car would have at least an auxiliary radiator, maybe an oil cooler and a separate transmission cooler.

The recent cooling related discussion reminded me of this really cool video on YT. Since we like race cars and Type Rs, enjoy some engine bay shots from a HRC race car: Did you notice the large hood vents?

This is the OEM cooler: https://www.ebay.com/itm/364473283710 Not really easy to delete it. You'd need to machine a flange just like that.

Yes. I managed to import the logs on Race Studio and Race Render. With Race Render I can add data overlays to videos, like this: https://www.civicx.com/forum/threads/the-fk8-track-junkie-thread.65169/post-1228196

Sorry, let me rephrase that. The OEM oil to coolant heat exchanger is a box below the water pump. It stays there. Oil cooler kits for the CTR add a sandwich plate at the oil filter to have the oil pass through an oil to air core. Re the thermostat, you are right. I just wanted to mention that...

I wrote an open source converter from FK8 logR databases to csv. Maybe someone could update that for the FL5. Unfortunately our LogR also doesn't log any oil related readings. Not unpopular at all - this is a common opinion on civicx. Many turned to tube&fins ICs or even returned to stock...

Yeah, 302 F/150 C is the maximum reported oil temp, but your oil temps were certainly lower than that because of your oil cooler. Now I wonder how you didn't notice the ECT bars? I mean, coming from an FK8, you certainly were used to look at that every now and then. > I didn't even notice the...

Oh I see. I thought they had some kind of adjustment to make. Thanks for the answers. Btw, I once saw a post on your ig about chassis tuning books. I purchased them both and I'm really enjoying learning from them. Thank you for that!

My reasoning is that the rejected power that goes into the oil should be the same as in the FK8, and the heat exchanger is the same. What makes the Oil temp rise quicker in the FL5 (even though ECTs are A LOT better) and slower on the FK8? My FK8 never saw 150 C Oil temp after 2 laps on the same...

ok 244 F is just a normal Tuesday on a FK8 haha. Felt the same really? Every reviewer says the FL5 rotates so much easier. And I think you are the first one to upgrade to an FL5 that used to track their FK8 hard. I'll wait for your observations next trackday then! It is, both on the facelift...

This baffles me. A good friend on his first trackday with his FL5 saw Oil Temps reach 150 C rather quickly, but reported ECTs were just fine. On the FK8 we see ECTs and OilT rising at the same time. It feels like the water pump modification made the oil to coolant heat exchanger less efficient...

What was your max ECT? I thought the FL5 had no problem keeping ECTs down. Now the big question. What can you tell us about the differences in handling with the FK8??