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Post  davidll1984 Sun Dec 06, 2020 5:24 pm

i wil try the .074 pipe on .051 tee dee for a 3d heli cox powered and try on rc cars setup To tink the size of .074 wil fit for presurised tank and ad power To m'y modified tee dee .051 Tuned pipe experiment  and difrent custom parts  16072911
i need clutch from light machines heli rare clutch similar To The kyosho f1


Last edited by davidll1984 on Thu Apr 28, 2022 12:50 pm; edited 2 times in total
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Post  davidll1984 Sat Jan 23, 2021 11:24 pm

I have To test old cox Exhaust manifold i have made lot of change To the parts over size its exaust opening exit this parts have lots of restrictions if Not over size inside wit tool Tuned pipe experiment  and difrent custom parts  16114610
Tuned pipe experiment  and difrent custom parts  16114611
picturs befor modification


Last edited by davidll1984 on Thu Apr 28, 2022 12:48 pm; edited 1 time in total
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Post  davidll1984 Sat Jan 23, 2021 11:28 pm

And now wit larger exit Tuned pipe experiment  and difrent custom parts  16114612
Tuned pipe experiment  and difrent custom parts  16114613
Tuned pipe experiment  and difrent custom parts  16114614
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Post  Cribbs74 Sun Jan 24, 2021 12:32 am

Did you get any tachometer readings before and after modification? Would be nice to know if it increased performance over stock.


Avez-vous eu des lectures de tachometer avant et après la modification ?Serait agréable de savoir si elle a augmenté la performance par rapport aux actions
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Post  davidll1984 Sun Jan 24, 2021 11:35 am

As it is visible on the photo I have several pieces like this and several other different exaust collector y have place presure pickup tube To presurise fuel tank wit When i go Test I will make a comparative video of the result Tuned pipe experiment  and difrent custom parts  16115010
The tube is riveted in place
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Post  davidll1984 Sun Jan 24, 2021 11:44 am

The tube help holding in one direction so it Not rotate is also hi heat resistent gasket maker use To seal the part To its cylinder its seal tight no leak y use the no7 Dual Bypass, Single Boost Port Per Side
Factory Ground for Throttle Rings
Early 1990's Manufacture
Non Sub-Induction
New Original Cox Items its made for it and y found that the cox collector nead that no7 ground  cylinder    
To function properly
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Post  davidll1984 Sun Jan 24, 2021 11:57 am

tink the part was use To redirections of exaust fume out side engines compartiment it was use on no3 ground cylinder wit spi tink it was To limit the speed reducing performance lot no3 cylinder its one hi performance cylinder


Last edited by davidll1984 on Thu Apr 28, 2022 12:46 pm; edited 1 time in total
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Post  Cribbs74 Sun Jan 24, 2021 3:05 pm

Videos are nice, just not very telling of what is going on. It would be good to see the performance differences based on tachometer readings. The human ear is not very calibrated.

Even if the tach is off at least it should show the before and after difference. Some use audio tachometers downloaded onto their smartphones. I am leery of them, folks do claim they work though and at least it’s something to go off of.

Ron

Les vidéos sont agréables, mais pas très révélateur de ce qui se passe.Il serait bon de voir les différences de performance basées sur les lectures de tachometer.L’oreille humaine n’est pas très calibrée. Même si le tach est éteint au moins il devrait montrer la différence avant et après.Certains utilisent des tachomètres audio téléchargés sur leurs smartphones. Je me moque d’eux, les gens prétendent qu’ils travaillent si et au moins c’est quelque chose de se passer de.

Ron
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Post  davidll1984 Sun Jan 24, 2021 8:21 pm

Don't worry I own a tachometer m'y is a Digital Tachometer
Item No.HAN156 from hangar 9 tink somtime the Reding is Not correct No enough light i tink it can read difrent prop 234 blade  tink of using in the vidéo i wil make vidéos Not now du To very low température My hands hurt verycold: Cold Cold


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Post  davidll1984 Sun Jan 24, 2021 9:11 pm

I tink i have To try one of chose ap if they work  i wil use audio tachometers on m'y rc cars as Most of m'y extrême performance engine Have now become car engines i have no other way To tach them now   Most of the time if Find engine wit over 19 k y use the engine cylinder piston tank wit its back plate on cars crank and build insane jerobee modified engines u Find no jerobee 350_4 wit no 7 cylinder or no4  y have se one jerobee wit the texaco tank for bether fuel draw at lower rpm wit lower power lost of rpm To i made one extrême gtp setup wit heat sink modified fuel tank no 7 cylinder and want To change the casing for one anodised new color i want To dy color To m'y own parts build performance engine wit A color easy to distinguish from other engine that already exists With the new restriction of the faa tink cox international and ex models engines Really should offer parts option for car engine conversions like the egr valve clutch flyweel new model of clutch i have made lots of experiment wit them cars engine Not so difrent the gtp in fast is just like the sure start engine just difrent cylinder the kyosho f1 use the same size flyweel as the plane stuf become hard for Mr. miss everyone cars is one very big parts of the hobby Not wit cox cars its like just collections items just look toyan wy is so popular its simple To instal them in truck simple as that just give me the tool i build one crazy stuf wit cox engine To promote cox engine in the world for the kids that Not nowing it existe


Last edited by davidll1984 on Thu Apr 28, 2022 12:43 pm; edited 1 time in total
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Post  Cribbs74 Sun Jan 24, 2021 9:27 pm

Looking forward to the results, especially the exhaust collector.
Popcorn
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Post  davidll1984 Sun Jan 24, 2021 9:32 pm

Wit bit of mony y can start new production of rc cars powered wit cox engine y have new prototype on the work table and it look Good y save mony for late miling cuting table To cut carbon fiber y tink of askin 3 part To cut the carbon frame parts as its nasty stuf y don't want to die and for the engine parts If no one wanna make a new car part, I will its just mony that hold me back right now if cox or ex models want To build ther own or Maybe even m'y parts model its ok y just want parts so y can build new stuf wit old cars its cool but y like To run them and y run them a lots more than y do plane now
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Post  davidll1984 Thu Apr 21, 2022 3:12 pm

O I think I could have published several other different models I will update the different prototypes that I tried Here is the most recent model its a rc tuned pipe used To rc the engine for super low rpm and has Good flow low noise I sell them if anyone is interested Tuned pipe experiment  and difrent custom parts  Img_2317
Tuned pipe experiment  and difrent custom parts  Img_2317
Tuned pipe experiment  and difrent custom parts  Img_2318
I will also do an exhaust manifold
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Post  davidll1984 Tue Apr 26, 2022 1:16 pm

More parts are to be manufactured the tuned pipe its Exaust collector and difrent norvel type huge heatsink for cars som texaco type 5fins glow plug adapter extra cooling for rc plane And other even cooler pieces this one smal is fast To make is a glow adapter for norvel head Tuned pipe experiment  and difrent custom parts  16509910
Tuned pipe experiment  and difrent custom parts  16509911
This one for schort os no8. Plug. Wil make a turbo one and modified cox glow plug Lots of work on the workbench
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Post  balogh Wed Apr 27, 2022 3:37 am

davidll1984 wrote:O I think I could have published several other different models I will update the different prototypes that I tried Here is the most recent model its a rc tuned pipe used To rc the engine for super low rpm and has Good flow low noise I sell them if anyone is interested Tuned pipe experiment  and difrent custom parts  Img_2317
Tuned pipe experiment  and difrent custom parts  Img_2317
Tuned pipe experiment  and difrent custom parts  Img_2318
I will also do an exhaust manifold

Hello David,

I am not sure what component this is...is it a tuned pipe for a COX-sized engine?  Given the formula with which the resonance frequency of the tuned pipe is to be matched with the engine, I would expect an at least 30cm long pipe, like the Profi Tuned pipe that works with COX 049 TeeDee-s...

- 1675(wave speed) x 160(timing) ÷ 11 (pipe length) = 24.36k rpm

http://www.bolly.com.au/book/images/Image54.gif
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Post  davidll1984 Wed Apr 27, 2022 9:25 am

À Litle Explanation Principle of operation the drawing below Demonstrates the interior and operation of the valve mounted in the pipe stigner this parts is To use in a rc modèle And toned down the sound without loss of power or very litle gain compare Any model of silencer this model compare To The norvel silencer pipe only in desing m'y is larger a bit To help the engine performance Tuned pipe experiment  and difrent custom parts  Img_2323
Tuned pipe experiment  and difrent custom parts  Img_2324
I would like to have your impression and your suggestions on other models.Hand Shake  !! Babe Bee .049 or Thing you like to see RC Plane
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Post  davidll1984 Thu Apr 28, 2022 12:15 pm

As suggested i made a longer one wit a difrent reflective cone made mutch longer at 10°angle wit long stinger that is at the same time rc metering valve To control engine rpm this is the Front parts its Not finish Tuned pipe experiment  and difrent custom parts  16511610
Tuned pipe experiment  and difrent custom parts  16511611 it is the long divergences that i have trouble with finding the right tool To make sutch long angle cone... Huh... i have that long reamer but it not made for that use  Doh! !!!more stuf coming soon à custom .049 Babe Bee .049 🤐
Tuned pipe experiment  and difrent custom parts  Img_2325
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Post  aspeed Thu Apr 28, 2022 6:27 pm

I got this set when I was in Detroit. The first set was not ground properly so I returned it. The second set was the same. Just one bit of the three in both cases. For the price I just sharpened it myself. https://www.harborfreight.com/3-piece-stepless-drill-bits-66463.html
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Post  davidll1984 Thu Apr 28, 2022 9:27 pm

aspeed wrote:I got this set when I was in Detroit.  The first set was not ground properly so I returned it.  The second set was the same.  Just one bit of the three in both cases.  For the price I just sharpened it myself.  https://www.harborfreight.com/3-piece-stepless-drill-bits-66463.html
I have a similar tool Tuned pipe experiment  and difrent custom parts  16511910
but I prefer  using °angle miling bit i just have To Find the right size one and order it
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