Found a merc SC blower-merc blue,think its a B&M250 ,maybe off a 575SC or 600SC with duel blower carb set up.

Could this fit my 502-HP500 carb,think they have oval port heads,what manifold an can you get an inner cooler for it.

Seems to have the short snout and right lower pulley?

I think the other guy had a whipple inner cooler?

Need some help don't want to waste my funds.

Thanks, Randy

if it is a B&M 250, it would have come from a 600sc. If its a B&M 420, it came from a 800sc.

Teague makes the Super Chiller and the hardware to mount it.

All the engines you listed should have rec port heads.

If its off a 575sci, then its a Weiand 256.

Like was said, your engine and all the others have GM rect port heads.

600sc and 800 sc were the same 420 blowers...800 sc had more cubes..

like griff said its peobably a 575 weiand blower and the 575 had 2 throttle body efi units on top..

he linked me a tiny little pic and i thought it might be a 250 but then he sent me a bigger pic and it looks like a 420.

yep its a 420,,look around the sc,,,he painted the blower blue..

Thanks, guys,good eye on the painted, would it work or wait and get something else,not sure how old or how worn out maybe? Was just not a bad cost with blower carbs-$2,500 ?

I would skip the chiller (intercooler) on a charger this size, the 420's and larger don;t make as much heat. Make for a very tall engine with a chiller on it.

Running this on a HP500 without ring and compression mods I would suggest 4-5lbs of boost max. Pretty sure that blower runs 6-7lbs with the stock pulley.

You may want to consider a knock alert system

I wouldn't skip the chiller. Cheap power and cheap protection against the evil demaon detonation. Besides, it only adds 4.5 inches to the overall height.


As for the blower, on my 509 it makes 7psi at 5000 up to 6000 and thats about all she wrote.
Any bigger motor I would need a bigger blower.
hmmmmmmmmmmmmmmmmmmmm????