I am in the middle of building a motor for my setup. Im going to run a TS 35r since I ditched the 40r idea. I just came from the honda world. I keep reading about not revving the 2.3 stroker motors out past 7500-8000. Well here is my thinking and why I believe thats a very low rev for such a potent motor.

I was running a k24 bottom end out of a crv stock. It has a 99mm stroke with a 152mm rod and 9.114" deck height. I would rev it to 8200 on a stock bottom end with just a k20a2 oil pump and a built head. The 4g63 deck height is 9.010 and with a 100mm stroke and 150mm rods its very similar to the honda k24 engine. Now with a built bottom end as well as head, why is there no reason we cant take these motors to 8500?

Ive also been toying around some other crank options like the 94mm crank in a 4g63 block which will yield 2.1L which might be the best bet. I like the idea of the added tq. but hate the possibility of taking my car to the track and running out of rpm's in 4th and having to shift to 5th. Doesnt make for a good et.

Let me know what you guys think. Am I being overly paranoid about the motor and its revving situation?

TIA

 

I know ppl with 2.3 going to 8.5 all the time when racing.

 

you can rev these to 9k if you want. But it will shorten the life of the motor dramatically.

Piston speed of the stroker at 8.5k is very high compared to 2.0L. refer to 2.0 vs 2.3 sticky

Just destroke a 2.4L block to 2.1L or just have your 2.0L built if you want the rev. Latter will be a much cheaper option.
Instead of torturing yourself, you could simply call up reputable shops here on evom and ask for their professional opinions.

 

8000 for daily driving and 8500 for races ...

 

I think I am going to stick with 7500 :-)

 

8400 on my AMS 2.3 w/oliver rods and CNC head. But if you can afford it and like the best of both worlds 2.3rr has your name all over it. Keep us posted

 

I rev the 2.5 past 8k. It's not a 2.4L block either, it's a 2.0 -> 2.5. So I wouldn't see why a 2.3 couldn't do it all day long.

This is using a stock head, also no balance shafts.

 

daily driving i would not push higher than 7500-7600. Now if you just use if for racing then they are capable of 8500-8800

obviously that is dependent of the valve train and wither you have balance shafts or not.

 

Thread is here

 

Im sure its safe on many 2.3's but longgevity is another topic.

 

8500 for me 44+ psi a year so far didn't even have to change my bearings

 

it all depends on what combination you use with your engine internals. ie. piston, crank, rods. the best thing to do is talk to your engine builder and talk options.

 

Dude...Read the quote. It says what it says. 8500 RPM is safe. I'm not going to parse what Dave means by "safe".

 

Dude()...Im not really going to get into this p*ssing match. But Im sure there are lots of factors in this wide opinon, like fuel used, boost, how offten is it going to be pushed to 8500rpms and such. Your going off a direct statement he used at that time. And ask anyone out there about the difference of can it take it and longgevity. Im sure Buschurs 2.3 can handel it no dought, but if the OP chooses to take it to 8500 every shift every day dont you think it would decrase the life span of the motor....

 

Money