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alluminum vs. cast iron heads

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Old 01-11-2006, 10:17 PM
  #31
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Default Re: alluminum vs. cast iron heads

I was told that with a blower moter the alluminum heads wont make much of a Hp diff?
does anyone else agree with this theory
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Old 01-11-2006, 10:21 PM
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Default Re: alluminum vs. cast iron heads

with a blown 540 the 671 is a little small it would help if you would bring the comp up some with iron heads i would go to about 8 2 with this you could slow the blower down some and it would make more power, with aluminum heads i have gone as high as 9 to 1 but 8.5 would be safe and yes with this combo 925 hp plus is very normal i like the afr i run the 357 cnc heads on my 540 at 8.6 and it makes over 1000
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Old 01-12-2006, 07:02 AM
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Default Re: alluminum vs. cast iron heads

blasterbro..I agree with everything your telling this guy {I ran 871s on my 468s & looking at 1071s for my 540s} I was just shocked at how you insulted him.
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Old 01-12-2006, 08:44 AM
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Default Re: alluminum vs. cast iron heads

Quote:
Originally Posted by mikes280
with a blown 540 the 671 is a little small it would help if you would bring the comp up some with iron heads i would go to about 8 2 with this you could slow the blower down some and it would make more power, with aluminum heads i have gone as high as 9 to 1 but 8.5 would be safe and yes with this combo 925 hp plus is very normal i like the afr i run the 357 cnc heads on my 540 at 8.6 and it makes over 1000

Thanks for the post, How much boost are you running???
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Old 01-12-2006, 08:47 AM
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Default Re: alluminum vs. cast iron heads

Quote:
Originally Posted by blastersbro
i told you not to listen to people that tell you your combo is fine this guy knows.i have gone 9.5 compression no problem and 9.2 with steel heads.afr cnc hard anodized heads pretty good dart pro 1s the best.nothing wrong with merlins steel head if that is what you got.

now that makes sense blaster, thanks
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