I bet it's just different suppliers with no real difference in part specs.
__________________
Billy - 98 Prelude
#27 H2 NASA TX HondaChallenge
#27 PTB NASA TX Performance Touring Racing makes heroin addiction seem like a vague wish for something salty. -- Peter Egan
...and more than likely you can only get one set. My guess is that one of them isn't available anymore, and when they go to pull the parts you will get whatever set they can get.
Larry of Endyn seems to really love Nippon brand rings. Claims they are the best quality money can buy without ordering a full custom set. If I were building a block right now, I would probably go with those. I don't know about price, but I'd be willing to pay a little extra for those.
Out of curiosity, are you building the motor yourself?
My guess is that the stock ones are Nippon. I have beaten the crap out of stock Honda motors for YEARS without ever having a ring failure. Unless you are going FI I wouldn't even consider different rings.
My guess is that the stock ones are Nippon. I have beaten the crap out of stock Honda motors for YEARS without ever having a ring failure. Unless you are going FI I wouldn't even consider different rings.
Not sure what Honda uses, that is a very good question. However, if OEM was really Nippon, I think Larry would just tell people to buy OEM (as he has done in the past regarding other parts).
In my mind, it's not a question of ring failure per se but of ring seal quality. Quality rings are able to stay seated in the ring land more consistently, sustain even pressure against the bore, and consistently prevent oil contamination during combustion.
If you are interested in where I am getting this from, you can check out his posting here. Although, I have seen a few references to him not using Nippon brand for the 2nd ring (not sure why though).
Screw it. Vapor, just use OEM until I can figure out what Larry is talking about.
Actually, I may be building a bottom end for myself in the next few months, and I will probably end up calling Larry to pick his brain. On my list of questions will be his ring reccomendations.
Pistons came yesterday. :-) Now that measurements can be double checks and things can be balanced, time for a trip to the machine shop. :-D
Oh, one more thing I just remembered. Are you building this motor yourself? Just know the ring end gap is crucial to the final compression quality. There is a kick ass writeup by Jeff Evans on building a GSR motor that has really great instructions on how to gap and file rings (see here).
Oh, one more thing I just remembered. Are you building this motor yourself? Just know the ring end gap is crucial to the final compression quality. There is a kick ass writeup by Jeff Evans on building a GSR motor that has really great instructions on how to gap and file rings (see here).
I'd still measure them. Why skip that critical step?
__________________
Billy - 98 Prelude
#27 H2 NASA TX HondaChallenge
#27 PTB NASA TX Performance Touring Racing makes heroin addiction seem like a vague wish for something salty. -- Peter Egan
Honda rings DO come pre-gapped, if you are using Honda rings on a Honda block with a properly clearanced new Honda piston, I would not concern yourself with it. Change any of those parameters and I would definitely check the gap.
They'll get measured, but I am indeed using Honda rings on a Honda block with a properly clearanced new Honda piston. OS Type-S on a freshly bored block.
__________________ Chad Sullivan // 04 S2000 // 97 DX Hatch
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Chad Sullivan // 04 S2000 // 97 DX Hatch
OS Type-S on a freshly bored block.
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