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TR6 TR6 Helix swirl

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vettedog72

Jedi Knight
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If a helix swirl were cut into the individual runners of the intake manifold, what direction (clock wise or cc) would give the most benefit (if any)? I'm thinking to cut a helix in the intake manifold at the area where the runner contacts the head.
 
Depends on which hemisphere you're in /ubbthreads/images/graemlins/jester.gif
Honestly, I have no idea. Which way does the "tornado" doohicky spin the air?
Each runner may have it's own natural swirl to it. Might be a good idea to rig up some kind of wind tunnel test with a bore scope.
 
hook up your head to a spare sleeve. put shop vac at bottom of sleeve and seal off. using a light spring to hold the valve closed, rig up something to open valve from closed to full open in increments. connect up intake manifold and carb. turn on shop vac. get something to generate smoke in front of the carb, or better yet put one of those flow meters that looks like a snail on the carb with the smoke in front of that. get your $4000.00 dollar bore scope out so you can look inside the port (not sure how to do that, maybe from the sleeve side) to see which way the smoke naturaly twists with the carb butterfly and valve at various settings. do for all inlet ports through correct intake runner and carb. use plasterscene inside ports to model what you want to do (do not cut into ports because you can't go back) and record your before and after flow numbers from your snail flow meter then tell us all how it went with your improved ports. draw up and send it to us.
rob
 
Yes, I want it on my desk monday! /ubbthreads/images/graemlins/lol.gif
If the smoke dosen't work, try small pieces of string or ribbon to see which way they track inside the bores. Do a search on Scopes. They can be had for a few hundred if they're not to complex and don't need to be articulated.
 
oops!! those flow meters spin (correct me if i'm wrong) so they create a swirl.
rob (not so smart)
and yes, previous comment WAS sarcastic. ha. ha.
 
Has anyone ever proven the benefit of a swirl in an intake? Other than the people who are trying to sell the Tornado or those phenolic spacers with the swirl?
The Indian guy with the 2 liter Seven-Up bottle hasn't convinced me that he is anything but a Fakir.
The smoke test sounds interesting, but I don't know that anyone other than a specialist would be able to interpret the results.
 
smokey yunick,when he created his "hot" engine (whick was briefly covered in some mags, patented, bought (i believe) then never heard from again (i think he hit a nerve with corperations, it was too good/smart,efficient) designed an inlet/head port that created a swirl in the cylinder itself. this was done with specific location and angles of the inlet port (2-valve) in relation to the cylinder.
all that swirl in a manifold is likely to do is create more boundary turbulence to keep fuel in suspension. also it would increase drag.
rob
 
Rob:
I think the drag is a slam-dunk as far as creating any directional gas flow change or increase the velocity of turbulence, but the advantage in the combustion chamber is a big off set to the impeded flow. At least that is the idea that seems to be working in the modern engines.

The turbulance is a relatively new innovation for the masses; not much attention was placed on it in the early 80's when the TR6 soup-up book was printed by the factory. I understand the newer Mustang HO engine has a bump in the combustion chamber of each cylinder with the sole function to cause a turbulence, which in turn increases power. IMHO, anything in this new (new to the masses of motor heads) innovation could be very beneficial.
 
swirl or turbulence in the combustion chamber is one thing, gives great benefits. swirl in the intake manifold.....? i don't know. i would try something non permanent to experiment, but would probably need a dyno to see if it did anything for YOUR motor.
rob
 
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