Hamilton Cams
ignorant
- Joined
- Jun 28, 2007
- Messages
- 2,639
There has been some discussion about discepancy on the flow number of our head recently. On my bench I have seen our intakes flow any where from 220to 240 depending on the valve job. Our customers have reported flow 209- 235 depedning on a lot of variables. It is funny to see so many people saying that they don't work. It is also funny to see that people are so afraid of allowing them. If they don't work anyway, it should be fine if they are allowed..... right? I have heard of everything from, the casting is poor quality, they don't flow anything, I can get better out of my OE head, to cam grinder "X" said you and the heads suck. These things are literally a lightning rod for arguments.
Flow is very relative to the person running the flow bench, their competency, inches of vaccuum, valve angle, casting shift, the machine it is running on or the day of the week. When flow numbers are talked about, they are only good to see if a gain was had in doing modifications on one head, on one bench. All of this talk of aftermarket companies telling customers that their head flows X, Y, or Z is pretty useless for comparrison to another head on another bench in a different state. Even if flow numbers were identical on two heads done by different companies, they can perform totally different. The only way to make heads or tales of the whole thing is to look at horsepower curves, which most people will not show on their full tilt engines. For that reason we will not be giving flow numbers on any of our heads from now on whether they are ported or out of the box untouched. I have found that the only benefit to giving flow numbers in most instances is to start pissing matches.
Just an FYI for all the nay sayers. I have seen an OE head that flowed exactly what one of our heads flowed on a dyno be almost 30hp under ours over a very wide rpm band. When it is all said and done, the flow numbers in most instances are good for bragging rights only, unless you flow your head on your machine that you use to benchmark all of your heads from the past.
What I should have posted when our heads came out. Our heads flow around 55% more on the intake port and about 20% more on the exhaust port than the average OE head. Compared to a stock head they will make at least 50hp or greater in different setups if you have additional flow potential out of your turbo and fuel system.
If you want numbers before you buy a head I will just say they flow 180cfm out of the box, that should be low enough so that nobody will be dissapointed when they get their head on their personal bench.
Our heads flow at least 180CFM Gauranteed or your money back. If you need any number other than that, send your head to the shop of your choice. The premise of racing is mine is bigger than yours for the most part. Please take that mindset somewhere else. It is not productive for the sport or my sanity. Besides, these heads are cheating, and your stock head will outflow them anyway, why even bother buying one
Zach
Flow is very relative to the person running the flow bench, their competency, inches of vaccuum, valve angle, casting shift, the machine it is running on or the day of the week. When flow numbers are talked about, they are only good to see if a gain was had in doing modifications on one head, on one bench. All of this talk of aftermarket companies telling customers that their head flows X, Y, or Z is pretty useless for comparrison to another head on another bench in a different state. Even if flow numbers were identical on two heads done by different companies, they can perform totally different. The only way to make heads or tales of the whole thing is to look at horsepower curves, which most people will not show on their full tilt engines. For that reason we will not be giving flow numbers on any of our heads from now on whether they are ported or out of the box untouched. I have found that the only benefit to giving flow numbers in most instances is to start pissing matches.
Just an FYI for all the nay sayers. I have seen an OE head that flowed exactly what one of our heads flowed on a dyno be almost 30hp under ours over a very wide rpm band. When it is all said and done, the flow numbers in most instances are good for bragging rights only, unless you flow your head on your machine that you use to benchmark all of your heads from the past.
What I should have posted when our heads came out. Our heads flow around 55% more on the intake port and about 20% more on the exhaust port than the average OE head. Compared to a stock head they will make at least 50hp or greater in different setups if you have additional flow potential out of your turbo and fuel system.
If you want numbers before you buy a head I will just say they flow 180cfm out of the box, that should be low enough so that nobody will be dissapointed when they get their head on their personal bench.
Our heads flow at least 180CFM Gauranteed or your money back. If you need any number other than that, send your head to the shop of your choice. The premise of racing is mine is bigger than yours for the most part. Please take that mindset somewhere else. It is not productive for the sport or my sanity. Besides, these heads are cheating, and your stock head will outflow them anyway, why even bother buying one
Zach
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