screaming440
The Old Skool Professor
- Location
- KC/Lake of The Ozarks
a 1974 would have been a js 400 but yes they both are twins and are just like the 550.
most of the old 400s and 440s never got upgraded to a stainless sleeve pump. the all aluminum pumps had to much clearance and ate up all your hp.
a stock 440 is slow cuz it is really choked off. so the difference is with a sleeved pump and few mods you get a ton of power out of a 440.
i have both 40's and 50's and there is little diference in the topend speed when built right. a 440/440 pump will out run a 550/550 with the same mods. A 550/440 is the best match cuz they both make rpm power and this setup will out run both the others.
the 40 has smaller pistons so it make more low rpm power.
most of the old 400s and 440s never got upgraded to a stainless sleeve pump. the all aluminum pumps had to much clearance and ate up all your hp.
a stock 440 is slow cuz it is really choked off. so the difference is with a sleeved pump and few mods you get a ton of power out of a 440.
i have both 40's and 50's and there is little diference in the topend speed when built right. a 440/440 pump will out run a 550/550 with the same mods. A 550/440 is the best match cuz they both make rpm power and this setup will out run both the others.
the 40 has smaller pistons so it make more low rpm power.
