Novice Modified 289 Heads
Moderator: David Vizard
Re: Novice Modified 289 Heads
201/160cfm for 1.78/1.45 valves is working pretty well.
The work looks pretty good too........ not that the flow bench knows the difference.
The work looks pretty good too........ not that the flow bench knows the difference.
Somewhat handy with a die grinder.
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Re: Novice Modified 289 Heads
Phil,The Iron Icon wrote: ↑Mon Jul 08, 2019 1:04 pmStock valves were used for both tests, i believe we actually used same exact ones.Stan Weiss wrote: ↑Mon Jul 08, 2019 10:36 am David / Phil,
Is the your exhaust valve size the same size for both tests?. There is a thick and thin horizontal red line which shows at .25 D for the exhaust valve. Note the blue lines overlap each other .25 d intake.
Stan
Could you or David email me the 2 "DAT" files used to produce these graphs?
Thanks,
Stan
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Re: Novice Modified 289 Heads
Stan Weiss wrote: ↑Tue Jul 09, 2019 10:57 amPhil,The Iron Icon wrote: ↑Mon Jul 08, 2019 1:04 pmStock valves were used for both tests, i believe we actually used same exact ones.Stan Weiss wrote: ↑Mon Jul 08, 2019 10:36 am David / Phil,
Is the your exhaust valve size the same size for both tests?. There is a thick and thin horizontal red line which shows at .25 D for the exhaust valve. Note the blue lines overlap each other .25 d intake.
Stan
Could you or David email me the 2 "DAT" files used to produce these graphs?
Thanks,
Stan
Stan, i will try to get file to you this saturday when im at David's.
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Re: Novice Modified 289 Heads
I had to talked with David this morning about the TMC program. So I asked him about this. He found one file had 1.45" and the other had 1.48" for the exhaust valve size. He also said that you / he should maybe remeasure the port (159cc seems high).
Stan
Stan
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David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
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http://www.magneticlynx.com/carfor/carfor.htm
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Re: Novice Modified 289 Heads
You pick a round number just above where you are going to lift to and stick with that. The lift for these heads will be about 0.625 so 700 was chosen as the highest measured lift point.gmrocket wrote: ↑Mon Jul 08, 2019 12:43 pmWhy does it need a max valve lift? Does that mean if you change the max valve lift by .025" up or down, both H&V axis will have different values again for this same head?Stan Weiss wrote: ↑Mon Jul 08, 2019 10:27 amThe program took the max valve lift and produces 10 evenly spaced lines.mag2555 wrote: ↑Mon Jul 08, 2019 6:16 am I must admit here that I am having a hard time swallowing a 25.6% peak Intake flow gain from just bowl porting work on this one!
Can you atleast tell us what the Valve to Throat percentage is now ?
Can you go into detail on what some sizes where stock and what they are now if you can?
Also why are the Valve lift numbers being given in those increments used in the charts?
The program also takes the lift points / flow data and generates a "spline curve" which it graphs, rather than straight lines from data point to data point.
Stan
If it will, us who are only seeing a graph here will have a hard time comparing things.
I have a head with the same size intake valve I'm trying to compare with this one...i thought it would be easy.
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Re: Novice Modified 289 Heads
Well guys i remessured the intake on stock port and one we had ported that we showed results of. Came up 128cc stock and 135cc ported. We will put up the charts to reflect what this changed later on. Sorry for any confusion.
Re: Novice Modified 289 Heads
On my 289 thread my 1.94" port was about 154cc and my 1.85" port was about 146cc fyi.The Iron Icon wrote: ↑Sat Jul 13, 2019 11:27 am Well guys i remessured the intake on stock port and one we had ported that we showed results of. Came up 128cc stock and 135cc ported. We will put up the charts to reflect what this changed later on. Sorry for any confusion.
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Re: Novice Modified 289 Heads
I understand picking a round number above your max lift. I don't understand using 10% going down as a measuring unit?David Vizard wrote: ↑Sat Jul 13, 2019 10:39 amYou pick a round number just above where you are going to lift to and stick with that. The lift for these heads will be about 0.625 so 700 was chosen as the highest measured lift point.gmrocket wrote: ↑Mon Jul 08, 2019 12:43 pmWhy does it need a max valve lift? Does that mean if you change the max valve lift by .025" up or down, both H&V axis will have different values again for this same head?Stan Weiss wrote: ↑Mon Jul 08, 2019 10:27 am
The program took the max valve lift and produces 10 evenly spaced lines.
The program also takes the lift points / flow data and generates a "spline curve" which it graphs, rather than straight lines from data point to data point.
Stan
If it will, us who are only seeing a graph here will have a hard time comparing things.
I have a head with the same size intake valve I'm trying to compare with this one...i thought it would be easy.
Why not start at .700", then next .650" or 600" and on down in .050" or .100" increments?
The graph would still look exactly the same, bit the numbers would make more sense.
Maybe I'm being too simplistic
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Re: Novice Modified 289 Heads
So you think that there should be an option to be able to produce the graph like this?gmrocket wrote: ↑Sat Jul 13, 2019 1:03 pmI understand picking a round number above your max lift. I don't understand using 10% going down as a measuring unit?David Vizard wrote: ↑Sat Jul 13, 2019 10:39 amYou pick a round number just above where you are going to lift to and stick with that. The lift for these heads will be about 0.625 so 700 was chosen as the highest measured lift point.gmrocket wrote: ↑Mon Jul 08, 2019 12:43 pm
Why does it need a max valve lift? Does that mean if you change the max valve lift by .025" up or down, both H&V axis will have different values again for this same head?
If it will, us who are only seeing a graph here will have a hard time comparing things.
I have a head with the same size intake valve I'm trying to compare with this one...i thought it would be easy.
Why not start at .700", then next .650" or 600" and on down in .050" or .100" increments?
The graph would still look exactly the same, bit the numbers would make more sense.
Maybe I'm being too simplistic
Stan
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Stan Weiss/World Wide Enterprises
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
http://www.magneticlynx.com/DV
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
http://www.magneticlynx.com/DV
Re: Novice Modified 289 Heads
Stan, that seems like the way you would want it so one would be able to compare that head to any other published data in the industry.
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Re: Novice Modified 289 Heads
Absolutely.Stan Weiss wrote: ↑Sat Jul 13, 2019 2:41 pmSo you think that there should be an option to be able to produce the graph like this?gmrocket wrote: ↑Sat Jul 13, 2019 1:03 pmI understand picking a round number above your max lift. I don't understand using 10% going down as a measuring unit?David Vizard wrote: ↑Sat Jul 13, 2019 10:39 am
You pick a round number just above where you are going to lift to and stick with that. The lift for these heads will be about 0.625 so 700 was chosen as the highest measured lift point.
Why not start at .700", then next .650" or 600" and on down in .050" or .100" increments?
The graph would still look exactly the same, bit the numbers would make more sense.
Maybe I'm being too simplistic
Stan
ab-cfm-flow-100.gif
Would that work better for your online head flow library?
And everyone else in the world
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Re: Novice Modified 289 Heads
I have left the default just the way it always has been at 10 lines on the X-Axis. I have added an option to “Have the Program Automatically Adjust the # of lines for the X-Axis.”. So it is now up to the user how he wants his graphs.
Stan
Stan
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Stan Weiss/World Wide Enterprises
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
http://www.magneticlynx.com/DV
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
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Re: Novice Modified 289 Heads
Well it wasn't bugging me before but it kind of is now I guess it's really not a big deal because, like Stan said, the flow at the lift you personally checked it at is in the printed fields.
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Re: Novice Modified 289 Heads
Shawn,
This is not for the person that has the program or all of the data but for the person who is just looking at the Graph. If you have the program you can move your mouse pointer to any shot on the graph and the program will show valve lift and cfm for that point. If someone is interested in cfm at lets say 350 lift or 400 lift isn't the above graph easier to see that than this default graph?
Stan
This is not for the person that has the program or all of the data but for the person who is just looking at the Graph. If you have the program you can move your mouse pointer to any shot on the graph and the program will show valve lift and cfm for that point. If someone is interested in cfm at lets say 350 lift or 400 lift isn't the above graph easier to see that than this default graph?
Stan
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Stan Weiss/World Wide Enterprises
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
http://www.magneticlynx.com/DV
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization Software
http://www.magneticlynx.com/DV