afr, rhs, or ?
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afr, rhs, or ?

  1. #1
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Default afr, rhs, or ?

    looking at some new heads for my 505 m4 in the tx19. getting rid of the procomps(115cc) and goin to a 119 chamber/thick gasket otta drop my compression to near 12 to 1 , maybe a tad more, but cheaper to run no less. i'm looking for a head with good velocity on the runners and somewhere around 390cfm at .700, the rhs 360 head looks good, but the port size leaves me thinking their gonna kill me below 6krpms. the dart 345cc look pretty good too and are a option. so what i'm getting at is what head between afr/dart/rhs would be a better choice for my say 12-12.4 to 1 505? wanna make the most hp at near 6300, let the nitrous carry the motor to 7k. getting chris to grind a cam for whatever head i decide on, so they need to be outta the box ready/good flowing heads. wanna keep the head upgrade to 2k or less, it was doin good on the procomps already, but i want less compression and a better head/cam combo , so what's lost in compression over the winter, will be made up with a better combo building hp at lower rpms let's hear some suggestions, are the 345cc darts to big? how bout the rhs 360cc heads?

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    Cantard 71hallett's Avatar
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    Pro-Filer,s are on sale right now.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    gn7
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    [QUOTE=IMPATIENT 1;391581] so they need to be outta the box ready/good flowing heads. wanna keep the head upgrade to 2k or less, QUOTE]

    Thats going to be pretty tough to do, unless you just don't care about the parts that will be in those heads, sorry but that's the reality. I would give these serious consideration
    http://www.competitionproducts.com/p...mber=C11932CK2



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    Quote Originally Posted by IMPATIENT 1 View Post
    looking at some new heads for my 505 m4 in the tx19. getting rid of the procomps(115cc) and goin to a 119 chamber/thick gasket otta drop my compression to near 12 to 1 , maybe a tad more, but cheaper to run no less. i'm looking for a head with good velocity on the runners and somewhere around 390cfm at .700, the rhs 360 head looks good, but the port size leaves me thinking their gonna kill me below 6krpms. the dart 345cc look pretty good too and are a option. so what i'm getting at is what head between afr/dart/rhs would be a better choice for my say 12-12.4 to 1 505? wanna make the most hp at near 6300, let the nitrous carry the motor to 7k. getting chris to grind a cam for whatever head i decide on, so they need to be outta the box ready/good flowing heads. wanna keep the head upgrade to 2k or less, it was doin good on the procomps already, but i want less compression and a better head/cam combo , so what's lost in compression over the winter, will be made up with a better combo building hp at lower rpms let's hear some suggestions, are the 345cc darts to big? how bout the rhs 360cc heads?
    Would you consider a set of used heads in good shape?
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    One Free Call Does it All CP Performance's Avatar
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    Dart Pro 1's, i'm blowin out a couple sets for dirt cheap.http://www.cpperformance.com/SearchR...CategoryID=612
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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by cstraub View Post
    Would you consider a set of used heads in good shape?
    absolutely, i sent him a pm bout the afr's do you think they'll make 800-850hp pretty easy with your cam chris(would like to keep lift under 740)? my 505 has .010 deck hieght, 48cc domes, 6.385 rod, 4.25 crank.

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    adjones419 Wet-n-Wild's Avatar
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    I was considering a set of the RHS 360 heads but was turned away by a lot of machine shop guys telling me to stay away from them. I bought a pair of AFR 357 CNC'd heads and am very impressed! They might be a little big for your 505 naturally aspirated, though.
    Adam
    Hallett 210

  10. #8
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Wet-n-Wild View Post
    I was considering a set of the RHS 360 heads but was turned away by a lot of machine shop guys telling me to stay away from them. I bought a pair of AFR 357 CNC'd heads and am very impressed! They might be a little big for your 505 naturally aspirated, though.
    the rhs 360 do also look alil big for me , but i've been hearing so much good stuff bout afr heads lately, would like to go in that direction.

    do the afr heads have the same basic chamber design as the pro1's? when i did piston to valve, i had so much room i didn't even measure to see wtf i actually had, be neat to stay that way on a bigger roller cam.

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    Quote Originally Posted by 71hallett View Post
    Pro-Filer,s are on sale right now.
    only name brand heads from here on out i really think alot of guys would be surprised at how this thing ran with the procomps on it, the motor did reallllly well all summer. i did all the towing in this summer, never once needed 1 myself and i ran this biatch HARDDDD

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    gn7
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    Quote Originally Posted by 71hallett View Post
    Pro-Filer,s are on sale right now.
    Quote Originally Posted by IMPATIENT 1 View Post
    only name brand heads from here on out i really think alot of guys would be surprised at how this thing ran with the procomps on it, the motor did reallllly well all summer. i did all the towing in this summer, never once needed 1 myself and i ran this biatch HARDDDD
    Pro Filers?......"only name brand from here on out?" not trying to be an ass hole here but did you really mean to post that response? You did qoute 71 hallett post but I am a little confused



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  13. #11
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by gn7 View Post
    Pro Filers?......"only name brand from here on out?" not trying to be an ass hole here but did you really mean to post that response? You did qoute 71 hallett post but I am a little confused
    just heads that aren't weird, stock replacement type that don't need tons of work to work

    just got a call from someone in weatherford that is interested in the boat and is talking to his ole lady, told him i'd wait till sunday to pull it apart, after that i'm getting after it.watch it sell now that i gave up trying to sell it

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    gn7
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    they are outside your budget anyways, but there is nothing weird or no-name about them. and they certainly don't require anymore work than any other head in their price range. http://www.profilerperformance.com/bbc-heads-174.html



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  15. #13
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    Quote Originally Posted by gn7 View Post
    they are outside your budget anyways, but there is nothing weird or no-name about them. and they certainly don't require anymore work than any other head in their price range. http://www.profilerperformance.com/bbc-heads-174.html
    prob why i've never seen a set

  16. #14
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    Quote Originally Posted by gn7 View Post
    they are outside your budget anyways, but there is nothing weird or no-name about them. and they certainly don't require anymore work than any other head in their price range. http://www.profilerperformance.com/bbc-heads-174.html
    Hardest part is painting them the same color as the block so they look like iron ones.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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