heads flowed.

RE: heads flowed.

Dude, what's up with that exhaust? Those are some funky numbers. Why don't you have anything after .500"? How are numbers like those supposed to affect power? The intake flow looks great. Even higher than the numbers on the LMS website. I think your ex. numbers should be much higher though.
 
RE: heads flowed.

Dude, what's up with that exhaust? Those are some funky numbers. Why don't you have anything after .500"? How are numbers like those supposed to affect power? The intake flow looks great. Even higher than the numbers on the LMS website. I think your ex. numbers should be much higher though.
Click to expand...


I do not know waht is up with the exhast. That is why I posted over there on the corral. the way they start off till .300 is one of the best flowing heads out there, and on its way to 250+ then it falls on its face. at .350. I do not understand why. I hope with the heads in the car and the headers on there the flow will increase like it is supposed to. Hopefully this is once of the rare cases where peak flow numbers do not mean jack but real world gains will be quite strong.
 
RE: heads flowed.

The only reason that makes any sense is the 2 mm oversize valve is too large for the head.The edge of the valve might sit too close to the head and is not allowing air to get past the valve.

These heads are going to make great power.Especially in the midrange.
My heads were the first of this kind that my guy did.Hes defiantely getting better.

Joe did you see on your Corral post where the other guy posted his numbers?You KILLED his.
 
RE: heads flowed.

don't care if I outflowed him. I should have. I am concerned about the exh side. THe numbers were the best I have ever seen until .350
 
RE: heads flowed.


WHere did you have them flowed,who did the work?
[/quote]
They were flowed in Las Vegas. Chris K had the latest work done to the heads.
Click to expand...

Took the heads to FOx Lake today. I had them flowed again as well as some expert advice on them.

Here is what they flowed

Int Exh
100 98.7 92.3
.200 170.9 158.2
.300 230.0 220.1
.400 269.9 233.5
.450 282.3 237.3
.500 292.0 239.3
.550 303.8 239.9
.600 308.3 239.3

Fox lake had some things to say about the heads. First off they did not like the valve job. THey said it would work but not how they do theirs. They said that hurt the flow on the heads. THey also said that the short turn radius on the exhaust side was not good at all. There was a ridge right ion the middle of the short turn on every port. THey said that is what is hindering the flow of the exhaust side and making it stall out. THey also saw ridges where they cut the seats that were blocking flow in almost all of the exh valves. They also did not like the throat area of the exhaust side. Said that was huindering the flow and causing turbulence at .300-.400.
 
RE: heads flowed.

Joe, first off it proves everyones suspicions about Fox Lakes flow numbers being exaggerated.

Just a little note on these heads.They were ported by one guy who screwed them up pretty good.They were then fixed as best as they could have been.
The shop that did the valve job is also a VERY reputable shop.They do work on some of John Forces heads.If that adds some credibility to the issue.
The valve job was done on a Sunnen CV16.
The cutter that was used was a Chapman cutter.Every head that they have flowed before and after the chapman cutter has picked up 10-15 CFM after the cutter was used.
 
RE: heads flowed.

how can they be exaggerated when the intake numbers flowed a lot less than they did on the other bench?

Also they had heads there that flowed more cfm with stock valve sizes and they showed me where I can gain CFM on the set of heads that i have by improving the short turn radius on the exh side for 350$

Granted these heads were not done correctly the first time and the head porter was trying to redo them, but there were the same exact flaws on all the short turn radius on both heads.
 
RE: heads flowed.

Ohh yea the exhasut was flwoed wit ha pipe. That is why the numbers on the exh are higher than before.
 
NEW head flow numbers

NEW head flow numbers

Old numbers:

Int Exh
100 98.7 92.3
.200 170.9 158.2
.300 230.0 220.1
.400 269.9 233.5
.450 282.3 237.3
.500 292.0 239.3
.550 303.8 239.9
.600 308.3 239.3


After Fox lake was done with them. All they did was clean up the short turn radius on the exhasut side, and narrow out the splitter. The ydid not touch the intake side except for new valve job. My opinion is do not deal with anyone else other than fox lake for your heads. THey found multiple serious problems with the heads while they had them.

INT EXH
100 100 90.0
.200 173.9 175.0
.300 225.9 224.0
.400 268.7 244.0
.450
.500 297.2 258.0
.550
.600 315.4 267.0
 
RE: NEW head flow numbers

RE: NEW head flow numbers

I snapped some pics while we were there. I have a set of heads waiting to be ported. I also got a couple of pics of Joes heads. I tried to get the entire port on Joes head, but it didn't come out very well. The secondary ports on my stock heads were gummed up with nasty garbage. I will probably gain alot of power by simply cleaning the intake ports. But, I plan on doing a little more than cleaning.http://www.columbusracing.com/ubb/graemlins/thumb.gif

http://mark8.org/users/Eli/1/FoxLake/
 
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