Insane revver OHV engine

Dang! I wasnt expecting it to rev this high


NASCAR engine? Nice work.

More like an engine loosely based on the v8-60 flathead

I would REALLY like to see what sort of magic and tricks you need to get a sidevalve engine to rev 9000. :smiley: :smiley:

Sidevalve (SV) NO; is OHV (OverHead Valve).

This is the difference:

SV: http://modelenginenews.org/gp2/ricardo_head.gif

OHV: http://1.bp.blogspot.com/-TSKi3kiZ66A/UW8SE_pDnAI/AAAAAAAABPc/sk_qStsCBc0/s1600/OHV.gif

making a high revver of a SV engine would bea easier than a OHV, since the valvetrain would be simpler and lighter; it would be a pointless endeavour though.

The combustion chamber on a SV engine is so TOTALLY wrong for high rpm capability, thats why i said:

9000 RPM is very hard to do if even possible. But i dit make a OHV engine capable of 360 HP at 8900 RPM, so pretty close to 9000 RPM.

consider a smaller bore engine

A shorter stroke allows engines to reach higher rpm.

sure… but the achilles heel of the pushrod engine are the valves usually

[quote=“skylineGTR34”]

9000 RPM is very hard to do if even possible. But i dit make a OHV engine capable of 360 HP at 8900 RPM, so pretty close to 9000 RPM.

http://oi62.tinypic.com/14mro01.jpg[/quote]

Challenge accpted.

http://imgur.com/V5Jux8z
Or if it doesn’t work imgur.com/V5Jux8z

You can use the tag to insert images into posts. Imgur itself provides a line of BBCode which you can copy into the post to insert an image.

For example, this is your image using the embed code that imgur gives you. http://i.imgur.com/V5Jux8z.jpg

[quote=“DrewM”]Imgur: The magic of the Internet
Or if it doesn’t work imgur.com/V5Jux8z[/quote]

Sorry my friend, but that engine only gets max power at 8200 RPM. My engine at 8900 RPM. And you compare your turbo engine whit an NA engine.
But if its max RPM we are after, beating you is not a problem. My engines displacement is more or less the same as your engine this time. I will let the image speak for them self.

First N/A engine

Turbo LF (LF = long life) engine:

Turbo max power but low life engine:

Ehm… Correct that comment, I don’t see the pictures.

It is fixed now.

And some offtopic stuff. I wanted to se how high RPM a turbo engine cut go of producing power whit the same engines displacement but whit more modern 16 valve and dual overhead cam.
Answer: 10400 RPM for max power. Note: i can get more power from this engine, but that is at the cost of more power at lower RPM.
Im also posting this because i can se many complain about they cant get there turbo engine over 10000 RPM and this here is the prof of that it can be done.

Please note this is not a OHV engine.

What happens when you use a flatplane crank? Higher or lower power/rpm?

Tried my hand at a nascar engine

Can’t get to make it rev much higer, valve float.

with the M-OHV sytem coming in these engines will easilly spin above 10k rpms… I cannot wait… I facy making my v8s all pushrod saving exceptions.

After all, the Saleen S7 had one of these and it was quite a monster…