Now this makes sense.

Whether you want to take it to 9,000 rpm depends on your appetite for risk.

Honda is relatively risk adverse and did not want to do it. However, if you are more risk tolerant than Honda, then go for it! Honda has no idea what kind of oil you'll be using, how often you'll do your oil change, etc.....all these variables add to Honda's risk thereby prompting them to leave a margin of safety. However, if you know you'll be using the best oil and changing it on a timely basis, then this allows you to get rid of that safety margin and push your engine closer to the limit.

It is a personal choice and not an unreasonable choice at that. That's my point.

 

sorry, but you're wrong. someone else even tried explaining it above, and you failed to listen.

an engineer calculated it for us on this forum in a previous thread where someone like yourself, was trying to make the same argument.

Ok, now you're just being ignorant. I already told you, we've had actual honda documents scanned in that stated exactly why the redline was lowered. You, however, have selective reading, and choose to ignore this fact.

[QUOTE]I've calculated some of the rod/stroke ratios for Honda's engines below:

B20A = 1.54:1
B18C = 1.58:1
H22A = 1.58:1
K24

 

They are the same part number. MY00-MY05 Heads.

 

Well guys...so in my quest to build my motor N/A I eventually plan to bump my F20c up to a 2.2L

I plan on using an F22 crank probably some Pauter Rods and yes stronger rod bolts, wrist pins, etc. as well, and probably Toda Pistons as I was to go with the Toda Spec B cams. Also have the motor re-sleeved with whatever other sleeves out there offer better stregth and protection. Now I also plan to rev the 2.2L up to 9000rpm as I feel I have replaced most of the parts that take on the additional stresses (rods, rod bolts, wrist pins). I also plan to have the bottom end blanced before reassembly and maybe even have parts cryo treated if it would help reduce the possibility of them failing due to fatuige. The reason I plan to rev this high is because with the cams, head work, and many other mods, I believe the motor will still be making more power at these rpms, if it wasn't there wouldn't be a reason to rev that high...but I think it will be.

Now, if I do all of that, is there really a reason why I couldn't bump it up 700rpm? I mean its pretty well built, I actually don't see why 9400 wouldn't be possible with a motor like that; but I planned for 9000 because I felt like it was leaving a "safety margin" and would allow to motor to last a long time.

Opinions on that?

 

Why do people argue over the internet????

 

Umm??? don't know, but I do know that I'm not arguing and really do want to know some factual info and preferably input from those who have done this.

Would the above setup that I listed not be capable of safely reving to 9000? If not why, and what would need to be done to make it better...also, the F20c can rev to 11000...doesn't the Spoon Race Car rev that high?

 

Look, if you ignore the arguing and ego-bating the answer is plain to see. The margin for safety decreases the more revs increase and the F2XC engines are reasonably close to max. If you run an F22C to 9000 you are decreasing your safety margin and increasing the statistical likelyhood of a failure but in general it will most probably be ok. Your call.

If what you're asking is for someone to take responsibility for your decision then I'm sorry, I won't be signing anything. But I am building a decompressed F22C and reving it to 9000.