News on AFR heads
Re: News on AFR heads
I'd like to see flow numbers with the intake (LS6) attached through all lift ranges at 28 inches and 3.9 bore....
Does a stock displacement LS1/LS6 have enough displacement to take advantage of the LSX and the AFR's?
Re: News on AFR heads $2800 is a no-go for me for the CNC heads.
Given the differences in flow benches, my admittedly uninformed opinion would be that they aren't demonstrating a significant advantage over the Patriot LS6 style heads... which are $1000 less.
Get them under $2000 for the CNC ported 205's and you might have something there, but at this point I honestly can't see why I would get worked up about them given what else is currently available.
Would some experts chime in and tell me where I have this wrong?
Given the differences in flow benches, my admittedly uninformed opinion would be that they aren't demonstrating a significant advantage over the Patriot LS6 style heads... which are $1000 less.
Get them under $2000 for the CNC ported 205's and you might have something there, but at this point I honestly can't see why I would get worked up about them given what else is currently available.
Would some experts chime in and tell me where I have this wrong?
11 Second Club
iTrader: (20)
Joined: Sep 2002
Posts: 2,684
Likes: 3
From: Albuquerque NM - The Land of 8000ft DA
Re: News on AFR heads
$2800 is a no-go for me for the CNC heads.
Given the differences in flow benches, my admittedly uninformed opinion would be that they aren't demonstrating a significant advantage over the Patriot LS6 style heads... which are $1000 less.
Get them under $2000 for the CNC ported 205's and you might have something there, but at this point I honestly can't see why I would get worked up about them given what else is currently available.
Would some experts chime in and tell me where I have this wrong?
Given the differences in flow benches, my admittedly uninformed opinion would be that they aren't demonstrating a significant advantage over the Patriot LS6 style heads... which are $1000 less.
Get them under $2000 for the CNC ported 205's and you might have something there, but at this point I honestly can't see why I would get worked up about them given what else is currently available.
Would some experts chime in and tell me where I have this wrong?
Even then there better be some pretty significant gains to justify the extra $1000.
Re: News on AFR heads
$2800 is a no-go for me for the CNC heads.
Given the differences in flow benches, my admittedly uninformed opinion would be that they aren't demonstrating a significant advantage over the Patriot LS6 style heads... which are $1000 less.
Get them under $2000 for the CNC ported 205's and you might have something there, but at this point I honestly can't see why I would get worked up about them given what else is currently available.
Would some experts chime in and tell me where I have this wrong?
Given the differences in flow benches, my admittedly uninformed opinion would be that they aren't demonstrating a significant advantage over the Patriot LS6 style heads... which are $1000 less.
Get them under $2000 for the CNC ported 205's and you might have something there, but at this point I honestly can't see why I would get worked up about them given what else is currently available.
Would some experts chime in and tell me where I have this wrong?
Even then there better be some pretty significant gains to justify the extra $1000.
The thing with heads is that there is a fine balance between volume and velocity- you need a head that is going to provide enough air volume (read: big port), but you need that same port to provide as high of a charge velocity as possible (read: small port). The answer?? An efficiently shaped port of moderate volume. This also explains why bigger motors work well with large ports than smaller motors do... because for a given RPM level (read: piston speed), the bigger motor will have more "suck" with which to induce speed in the intake port. A smaller motor would need to be wound tighter (read: higher piston speed) in order to achieve the same result.
11 Second Club
iTrader: (20)
Joined: Sep 2002
Posts: 2,684
Likes: 3
From: Albuquerque NM - The Land of 8000ft DA
Re: News on AFR heads Burnout
I understand the concepts you outlined and agree with you. Which is why I feel a dyno test or a track test will be the only way to do these heads any justice.
I understand the concepts you outlined and agree with you. Which is why I feel a dyno test or a track test will be the only way to do these heads any justice.
Tony,
Wow, 40-45 RWHP gain over a stock LS6 head on a 5.7?? That would be awesome because we just had a cam only Z06 make 417 RWHP and with the best we have seen from anyone elses ported LS6 Z06 being 442 RWHP that would put your little head at 457-462 RWHP.
Sorta sounds like a bold statement considering you guys haven't dyno tested these things. It will be interesting to see.
Regards, Brian Tooley
Wow, 40-45 RWHP gain over a stock LS6 head on a 5.7?? That would be awesome because we just had a cam only Z06 make 417 RWHP and with the best we have seen from anyone elses ported LS6 Z06 being 442 RWHP that would put your little head at 457-462 RWHP.
Sorta sounds like a bold statement considering you guys haven't dyno tested these things. It will be interesting to see.
Regards, Brian Tooley
Originally Posted by jfm
The bare casting heads sound great,I would buy a set right now if ready for my new motor.I would give them to Jay at Absolute Speed to hand port and finish.
Jay's ports are based on a smallest volume to achieve the highest flow.I cant wait to see what a set of your 200 cc,that outflow LS6 heads already,will do when finished by Jay.I am going to say that Jays new port will be around 205 cc when finished.
Jay's ports are based on a smallest volume to achieve the highest flow.I cant wait to see what a set of your 200 cc,that outflow LS6 heads already,will do when finished by Jay.I am going to say that Jays new port will be around 205 cc when finished.
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Brett Foote
Teching In
Joined: Dec 2003
Posts: 28
Likes: 0
i am not dissin any of the independent machine shops that port heads, but sending some company your heads and say 2000.00 to 2300.00 to have them assembled and ported is outlandish. i think the AFR heads are worth every penny they are asking. i have seen a set on line goin for 2495.00 for the 205 cc heads. look at what you are paying for. not just flow numbers but a high quality set of heads with decent flow numbers.. also some of the best customer relations out their. they stand behind their product 110% and if you have any problems they will work with you to ressolve them. also you are gettin brand new castings that in my eyes have huge upgrades compared to stock ls1/ ls6 castings. as far as them making a bold statement about their numbers is crap. they have been in buis for along time and know what they are doing. i know too many people that have the AFR sb chevy and ford heads and have had nothing buyt awesome results. i am not hopping on any band waggon but i think they have come out with an awesome head with many improvements and i will be getting a set my self. keep us informed on any new info Tony.
Staging Lane
Joined: Apr 2002
Posts: 73
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From: Newark, De
Originally Posted by JamMasterJ
Brian, as if you care, but when competiors dog into anothers thread it just makes you look bad. Tony has been very forthcoming is stating hes "cautiously optomistic". He is not "claiming", he's hoping and predicting. TEA is among my favorite choices, and is one of the best, but this just makes me crazy to see you add to this thread like that. And, I am not alone.
I wouldn't really call Brian a competitor as TEA does not make their own heads. Also they do port existing AFR offerings for customers. I would think he has a stake in this as when a customer does send a set of LS1 AFR heads to TEA they will have to far exceed the numbers claimed by AFR for their heads when the port work is done to keep their customers happy. I would think of AFR as more of a vendor of heads for TEA to offer their heads in staged versions. Hopefully the AFR LS1s are a great tool for both AFR and TEA.
Jess
I think the item that's in most of us in the wait and see crowd about the AFR's is the AFR LT1. The ported AFR LT1 heads were pretty much on par with a ported GM LT1/LT4 head.
It will be nice if the AFR's are the cat's meow because they'll only get better over time as new ports, valve jobs, dyno testing & track data etc are collected.
It will be nice if the AFR's are the cat's meow because they'll only get better over time as new ports, valve jobs, dyno testing & track data etc are collected.
Brian, I am in the market to buy a set of heads but will not even consider your heads because of your regular negative comments about other peoples heads. Also, a friend of mine replaced his stock LS6 heads with your St2 5.3 heads and lost 8 hp under 5,500 and only gained 10 over 5,500 and there was a spike on the dyno so it may have been less. You are a head porter not a head builder. AFR are hands down the best old school BB and SB heads on the market. I am going to wait and see what these heads can do before I spend that kind of dough. Either way, TEA's will never be on my car. Refrain from making silly comments. You are only hurting yourself. Sorry if I hurt your feelings but you need to check yourself bro.
