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10/21/15, 7:52 PM   #68
Re: New DII Engine rules
DAD
DAD is offline
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Join Date: Aug 2009
Posts: 5,957
 

Quote:
Originally Posted by LRP36 View Post
There is no midget motor making over 375-380 hp... It is impossible to do on straight methanol... There is a formula for per cubic inch how much methanol will make hp... I forget the name of it but all these guys says they have a 400 hp motor there is three things either it is "big" or whatever dyno it was ran on isnt reading true numbers or they are putting some stuff in the fuel
Bill

Here is a link to some charts for injector sizing.

https://www.injector.com/injector_selection_guide.html

We use 4 x 60 pound injectors in our 1000cc mini sprints making around 200 HP and back them up with 4 x 30 pound shower injectors to help cool the charge down a little.

For a 4 cylinder motor shooting for 400HP would require 4 x 150 pound per hour injectors.

The problem is not getting enough fuel in there>>>> the problem is getting enough air in there to burn the fuel. That is why intake valves and ports keep getting bigger and bigger. To the point they have to spread out the bores center and increase piston size to accommodate even larger intake valve. Essslinger raised their ports to get better air flow but they got stuck on valve size.

Now back to these little four valve heads. They flow much much better than a single valve cylinder head thus more horsepower is available. That is the reason we can get so much power out of the motorcycle motors. If we could put 2.6 motorcycle motors in a midget we would have 520 Horsepower on hand.

Honest Dad himself
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Last edited by DAD; 10/21/15 at 7:55 PM.