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[omega3000]

All joking aside, they will cause some turbulence and will be detrimental to performance.

Was it our American friend on here who did a How To on TB polishing and porting? 

Aye , grind em down smooth 

[flyer 0712]

Pattern parts or not,do they need any locking fluid on the threads when fitting.....or are the main dealer ones threaded so they grip tight and will not shake loose,if so will the pattern parts work loose,,,,,only asking as many years ago a friend of mine took his escort one apart including removing the screws and refitted  old ones only to have one come undone and drop into inlet manifold and ending up on top of piston...So just interested to know,,

[biggriffin]

Custard.

[omega3000]

[Broomies Mate]

That's the one I was thinking of EMD - Good Darts!

 

[Broomies Mate]

All joking aside, they will cause some turbulence and will be detrimental to performance.

Was it our American friend on here who did a How To on TB polishing and porting? 

how did you decide on that 


please let us know..

Because, Cem, the throttle butterfly is a part designed and machined to allow a smooth flow of air with as little restriction/resistance as possible.  Turbulence at this stage of Induction can only be a bad thing.  Not to mention that the bolt heads are chuffin massive, so will restrict air-flow.

As always, I have my asbestos suit on and await the flames. 

[cem_devecioglu]

All joking aside, they will cause some turbulence and will be detrimental to performance.

Was it our American friend on here who did a How To on TB polishing and porting? 

how did you decide on that 


please let us know..

Because, Cem, the throttle butterfly is a part designed and machined to allow a smooth flow of air with as little restriction/resistance as possible.  Turbulence at this stage of Induction can only be a bad thing.  Not to mention that the bolt heads are chuffin massive, so will restrict air-flow.

As always, I have my asbestos suit on and await the flames. 

turbulent and laminar flow must be calculated depending on the volumetric flow through the throttle diameter .. you can not just look at the screws and say "hey this will be turbulent"    


and besides, inlet manifold and inlet manifold pipe surface is very rough wihch may cause a turbulent flow at some rpm range.. but not that easy to say without calculation

[Broomies Mate]

turbulent and laminar flow must be calculated depending on the volumetric flow through the throttle diameter .. you can not just look at the screws and say "hey this will be turbulent"    


and besides, inlet manifold and inlet manifold pipe surface is very rough wihch may cause a turbulent flow at some rpm range.. but not that easy to say without calculation

Yes you can, I did! 

[cem_devecioglu]

also must note, turbulent flow which means slow air flow is desired at low rpm range which increases combustion efficiency

[cem_devecioglu]

turbulent and laminar flow must be calculated depending on the volumetric flow through the throttle diameter .. you can not just look at the screws and say "hey this will be turbulent"    


and besides, inlet manifold and inlet manifold pipe surface is very rough wihch may cause a turbulent flow at some rpm range.. but not that easy to say without calculation

Yes you can, I did! 

believe me it will take quite a long time to calculate that

[cem_devecioglu]

please have a look at this one


http://udel.edu/~inamdar/EGTE215/Laminar_turbulent.pdf

[Broomies Mate]

turbulent and laminar flow must be calculated depending on the volumetric flow through the throttle diameter .. you can not just look at the screws and say "hey this will be turbulent"    


and besides, inlet manifold and inlet manifold pipe surface is very rough wihch may cause a turbulent flow at some rpm range.. but not that easy to say without calculation

Yes you can, I did! 

believe me it will take quite a long time to calculate that

As usual Cem, you are being pedantry. You know those bolt heads will affect the flow of air, anybody with eye's can see the obvious.

How much it will affect performance is not important.... the fact that IT WILL is the point I have made, and the point I stand by.   

[Broomies Mate]

please have a look at this one


http://udel.edu/~inamdar/EGTE215/Laminar_turbulent.pdf

Thanks, Cem.  That will come in handy when I have slow running taps.

Now, back to something remotely relevant, please. 

[cem_devecioglu]

turbulent and laminar flow must be calculated depending on the volumetric flow through the throttle diameter .. you can not just look at the screws and say "hey this will be turbulent"    


and besides, inlet manifold and inlet manifold pipe surface is very rough wihch may cause a turbulent flow at some rpm range.. but not that easy to say without calculation

Yes you can, I did! 

believe me it will take quite a long time to calculate that

As usual Cem, you are being pedantry. You know those bolt heads will affect the flow of air, anybody with eye's can see the obvious.

How much it will affect performance is not important.... the fact that IT WILL is the point I have made, and the point I stand by.   

nope..


and the effect of those bolts on flow is really negligible compared to total area..  because the backing metal horizontal surface is bigger

[Broomies Mate]

nope..


and the effect of those bolts on flow is really negligible compared to total area..  because the backing metal horizontal surface is bigger

So you are saying there is an effect on air-flow.

So, you are agreeing with me, whilst being a pedant.

Ner ner ner ner ner!