Re: High Compression Head
 

Fel Pro 7013 for a street engine.
Solid copper with O-ring for race engine.

Re: High Compression Head
 

Very true, but he will also still have the biggest dyno numbers...lol

Re: High Compression Head
 

Thank you Pete

Re: High Compression Head
 

Only if you swap the engines into the same car for each test. Cheating the aero is a big part of it.



A car cruising at 50 mph may require only 10 horsepower to overcome aerodynamic drag, but that same car at 100 mph requires 80 hp. With a doubling of speed the drag quadruples. A car has a lower drag coefficient that only takes 8 horsepower to maintain 50 will only need 64 ponies to run 100.

Re: High Compression Head
 

I am still working on breaking 190 mph
We are pushing around 300 hp
Both the motor and I are sweating….
J

Re: High Compression Head
 

If you use a smaller pulley on the two blade fan it'll pull all the air thru the radiator and create a vacuum in front of the car?

Re: High Compression Head
 

With a big enough fan, the car becomes an airplane and they do not let airplanes run in that class.

Re: High Compression Head
 

The only performance numbers I ever thought to remember were told to me by Cummins engineering in the mid 80's.He said it takes 239 HP to maintain 65 MPH in a cabover truck with a box grossing 80,000,level road,no wind.He said there were variables,different gearing,radial or bias tires,smooth or outside post trailers,air quality,outside temp,etc.But,he also said that was a surprisingly accurate number even with all the variables.Came into my mind probably hundreds of times as I rowed with two sticks behind a 220 Cummins,hoping to hit 60.

Re: High Compression Head
 

One for sale:
https://www.ebay.com/itm/17602174552...gAAOSwBhNlTRay

Re: High Compression Head
 

Ohh, I have a fortune!
I have a pile of those laying behind the dyno shed
I’ll post the eBay link soon

Come and get them, John

Re: High Compression Head
 

At that price you would think the guy would ship it for free, geeeeeez.