I've done a lot of searching around and digging, but I just decided to come in and ask. What is the highest known dynoed and documented all motor K-series engine? Absolutely no nitrous or forced aspiration. I would greatly appreciate as much information as possible - links, pictures, dyno charts.

Thank you in advance.

 

I have seen 360ish dynapack, IPS motors.
Check k20a.org, lot's around 300 on there.
It's not that hard, you can build 2.1,2.2,2.3,2.4,2.5,2.6,2.7L's out of the k-series now. Guys are spinning them to 11,000+, and the cam selection is huge already.
Headers are making huge gains.

 

a fully built k24 frankenstein can net some nice numbers all motor, some guys have done crazy things with k series... check out k20a.org

 

My k20 in a 94 teg is 255 at front wheels. that would be well over 300 at flywheel. I race it in SCCA only and it never sees less than 6k during a race and often I shift it at 9k. It is a gorila. built by Hitech in Irvine Ca. and tuned by Church automotive

 

The highest all motor that I've found on there is 380hp. Reason I ask is because I've heard that there's someone that has broken 400hp, which is simply amazing if you ask me. I'd really like to see proof that such a machine exists.

 

300 to 320 is well "easily" attainable with a k....i dont think that anyone has broken 400 but im pretty sure the big boys are pretty close to it! there are tons of dyno sheets on k20a.org (check sig) for your eyes to feast on

 

I'm sure the big boys have broken 400whp.
IPS has posted graphs in the 360-380 range for public eyes, so you know the
"behind closed doors" stuff is higher. Skunk2, IPS,ERL cars are all 9's at 140+.
That takes power...

 

Exactly, to get a an 140+ in the mid 9's takes close to 400 if not so.

 

If you are talking whp--in a drag racing car that will go maybe 15 miles of full throttle running between rebuilds on alcohol and 2.5 L +--I would venture to guess the frontrunners are probably at 360-375 whp. Which is probably around 400-415 crank. I am sure there is someone, somewhere who has touched 390-400 from maybe 2600cc on methanol. I will also say, that unless they find a way to get over 2700cc (I know in some of the older A/M classes the displacement limit was 2700cc--no idea what it is now in the pro ranks of A/M) and really up the rpm--it will be almost a physical impossibility to see more than about 400-425 whp. Since displacement is almost tapped out, the only way to do it is rpm. I don't know what they rev these 100-110mm stroke monsters--but maybe 10,000-10,500? The load on the connecting rods and crank with such long strokes will be unbelieveable over 11,000 rpm. Motors will last 2-3 runs maybe.