Stock converter on a 440?

[J-440]

 Was it an 1800 stall speed? If so, why so low?

[myk]

I'm going to say the lower stall speed is what helped the 440 have more power at a lower RPM; a fat car like a charger needs its power sooner than later, usually...

[J-440]

 Hey that'll work for me.  Thanks again.

[b5blue]

I just put a Mopar 145K behind my 440 six pack and it's perfect for the street. The 145K is about stock for H.P. 440 with a rate of 2100. 

[firefighter3931]

I'm going to say the lower stall speed is what helped the 440 have more power at a lower RPM; a fat car like a charger needs its power sooner than later, usually...

Myk is correct.....the 440 was originally designed as a heavy vehicle (Station Wagon/C-Body) engine that later became a performance engine. That performance was geared towards low end power and torque to get these beasts moving off the line. 440 bottom end power is lengendary....they could all melt the tires from the factory.  A combination of cam and cylinder head made these engines torque monsters that didn't need excessive stall to build power....it was there, right off idle ! 

When we start modifying these engines with bigger cams, ported heads, headers, intake manifolds, bigger carburators etc...we are changing the operating parameters of the original engine design. When that happens we need to adjust the stall speed accordingly for best results. 


Ron

[b5blue]

Yea, my build is very much stock 69 1/2 build spec. with 9.5 pistons .060 over. (stock iron heads and Mopar resto R.R. cam.)

[John_Kunkel]

No stock 440 should stall less than 2000, the chart below shows the factory rated stall speed for the tightest converter ever installed behind a 440. The later years will stall even higher due to the use of the smaller converter after '77.

[John_Kunkel]

'78 stall speeds.