Quote:

Quote:

on a 470bb with a mp .590 solid,11.1 comp.,how much hp difference from a head that flows [Email]290@.600[/Email] vs [Email]315@.600?thanks[/Email],sam.



hmmm... i wouldnt recommend pulling heads just to do a port job...

are they irons? what heads?

what i would do, is shop around, lurk the boards find a top end for sale / heads intake

get offsets on them... heads ported at the same time. so your .590 lift becomes .630 and you have fresh springs/valves etc ready to go.

that would make a big difference. also if you go from 11.12 down to 10 something you may need to do some other work to stay legal. you could do some lightening as well and you will be down in the 10's

do it as an upgrade package... that way you can keep racing as you lurk and gather parts, and you will notice a much bigger change.

just taking your current heads off and having them ported and putting them back on is a ton of work & downtime with not as much return on your dollar

if you already have alum heads you could resell those

the motor is a new build to replace the grenaded 440,the heads are the mopar eddies that came off the 440,been touched up not ported,car weighes 3250 race ready.probably run them as is this year,only 4 weeks till track opens.