Last week I had a science of speed 11.5 pound light flywheel installed with a new exedy stock clutch and a new transmission. When returning to idle from low rpms, my engine wants to stall. I did an idle relearn, which helped, but it's still a hiccup that is happening. It hasn't stalled yet but it has come very close to stalling after returning to idle. I already put some of that honda connection gunk and zip tied my map sensor. Any advice?

 

Try cleaning your IACV.

BTW....hate to say it like this...but you're going to have issues with the Exedy clutch within maybe 10-20K miles.

 

Why do you say that? It's the same clutch that honda would sell me if I bought from them, right?

 

Exedy is not the same as OEM. I know I have seen posts but I think the issue stems from the springs not having the same cage around them on the exedy.

Not sure I am explaining that right but comparing pictures of the oem clutch :


And the exedy



You can see how much more open the springs are around the exedy. Unless they have fixed this it causes issues.

Found a thread https://www.s2ki.com/forums/s2000-un...1194096/page2/

This issue isn't limited to exedy either as other aftermarket clutches can have the same problem if the springs don't have the same cage as OEM.

 

Well then it appears the previous owner of my car was using an exedy clutch too. The one that was pulled from the vehicle was that second clutch, without the cage. He warned me that it would need a clutch soon when I bought it. That was 7k miles ago though.

 

Hey that is my OEM FCC friction disc^
What other non OEM parts was installed during the clutch job?

 

Just the exedy clutch (which came with the other essentials for the clutch) plus the flywheel, a dust boot and my transmission. The transmission was a used one with 32k miles on it. My original one has 260k miles.

 

Exedy cleverly, and highly deceptively, named their product OEM clutch. When pressed, they claim this label is to distinguish this item from their more race oriented options. That this is their oem equivalent option. Equivalent in holding power, not in quality.

They claim their use of the term oem in their product name isn't intended to fool people into thinking they were the oem vendor Honds used during the cars manufacturing, nor that its the same part you'd get from Honda as a replacement.

But that is exactly what the use of that phrase has done. Sadly, the exedy oem clutch typically seems to last around 20k miles before its toast. Common failure mode is it drops a spring, jamming clutch, and car is undrivable.

So their deceptive marketing tactics have fooled many, and continue to do so.

This forum is your best resource to be an informed buyer. Check here first before dropping major coin and you won't fall into such traps next time.

 

Well I know to watch out then. My coworker told me that exedy is the best brand and that exedy is the stock clutch, but honda just put their label on it. Guess he was wrong. I'll probably replace it in a year then. My next project is to rebuild the engine. But i don't want to spend $8k to have someone else do it.

 

I ran an 8 lb flywheel without any idle issues, it may just take a bit of time for your ecu to adapt to the idle. Keep doing idle relearn procedures, you can try to clean the IACV too.