Dyno's are great for testing, but until you get the engine in a car and at the track,
I agree,but racing against same cars on the street (that goes to the tracks) for testing purposes helps also.The thing is,when you street race,you normally do not go to tracks & advertize what you car runs,but if you have friends that do & you race them,you will get a good idea how fast or slow your car runs.
Sure ,you can write on your window in shoe polish N/T,,but that does not work all the time & your et's get exposed.We spent an entire day at the track just test intake manifolds on dads Pontiac, 13 of them. Each one was run twice. His station wagon will repeat times with in a few thousands each run, 11.41@117, at 4100 lbs it doesn't spin the tires. We can tell even the slightest change in performance due to the consistency. We still got grief because we didn't change the carb or cam or what ever to make one run better then the other.
Cant make everyone happy,no matter what dyno,track tested etc,somebody is going to say something was not done correct. Our point was to test against each other in the same weather and on the same engine at the same track. Theres no arguing about it!
People can still argue about your testing also. Remember people giving you grief?This is the same system we used to check mufflers, two runs each along with a sound meter. Again guys bitched because the runs were not altered to help one or the other.
This is what needs done with the heads. Flow bench numbers don't mean squat if it won't run at the track.
Or on the street I am not talking about all out 8000 rpm race engines. Bolt them to a everyday car with mild up grades (average Joe's) and see what 300 cfm does to a engine. I'm betting there isn't going to be much difference in any of the three types on a mild engine.
I am thinking there will be a big difference between a stock head & a head that flows 300 cfm even on a mild engine,maybe that's just me though. What it does come down to easy of installation and fit. The average machine shop probably hasn't seen a inline 6 in a lot of years, let alone built one, so adding lumps isn't going to be a job for anyone except a custom engine builder or hands on type of guy. The guy that repairs Honda cylinder heads is not going to like adding poorly fitting lumps!
And when I hear things like, "you have to know where to cut", it just makes me mad!,
Why would anyone want to help people out if there rival is competing against you? Why should this be such a secret that you can not show it or explain it,
No one has ever asked to see my 194 head until just now why bother bringing it up other then to brag about it.
Not bragging @ all, just stateing what I have run @ the track & racing on the streets. That right up there with cam grinds to secret to tell, "just buy it and you will be happy".
When there is money involved, people do not tell there camspecs Don't waist our time with out data to back it up, racing with out time slips is meaningless.
First off, I have no reason to make up any stories about what my car has run,timeslips,they are somewhere ,but after moving a few times & over a span of 26 plus years,things do get lost. If you know something but are unwilling to tell about
I have current timeslips of my Syclone,,full size P/U & GSXR 750 mainly because a have a digi camera,a external hardrive to keep things & photobucket helps also. All of which makes it easier to keep track & find things such as timeslips it, just keep quite or send a private note and talk off board.
Who said anyone is unwilling to share?
I was just thinking about my 194 head that has a small chamber.
When I had 12:1 compression
If anyone wanted to dyno test it again something comparable in a large chamber head they can use it.My 194 cly head is nothing special,in fact it has a little crooked screw in studs, because I had done it by hand/drill while on my engine 
Minimal porting has been done,chambers untouched,boss removed.
I would think tlowe would have something in his shop better than my cyl head.Sorry about getting off track, but come on, does every post have to get into the same arguments?
Not a problem, just done let dissageements get to you Joe
