Blower Question Again
 

Whats Better If You Want To Go Mild 671 Ona 540 Or A 420 Megablower

Re: Blower Question Again
 

They are the same size. B & M's calls their 420 and everyone else calls their 671. I had a 420 on a 468 and made 625tq.

Harvey

Re: Blower Question Again
 

I would step out to the 8 71 you want spin it as fast and if you ever deside to step it up.my mild 494 ci made 762 on 93

Re: Blower Question Again
 

8-71 Blower Shop. :cool:

Re: Blower Question Again
 

mine are 540's w/10-71'S chilled. I would not go smaller than an 8-71.

Re: Blower Question Again
 

can i have that engine in your pic

good to have your posts back

Re: Blower Question Again
 

8-71s

Re: Blower Question Again
 

Run 8-71s. Replaced 250s with 8-71 on mild 509s, kept the same boost, and picked up 4mph and lots of torque.

Re: Blower Question Again
 

I would run an 871 also. On a 468 BBC with 8 PSI boost will make 800hp. Blower Shop or BDS are good choices.

Re: Blower Question Again
 

I'm runnin' a 454 streched to a 498 with a 420 @ 8pds boost and Merlin heads and my own grind cam at 625 lift and 8:1 static comp. Twin 750 holleys not blower referenced but with power valves. 91 oct fuel. Very happy with the setup in the 800hp range now. Never had a glich and runs like a bat outta hell. Idles all day without loading up, runs, races perfectly. It's a very reliable setup.