For a school project I have to study with CFDesign "fluid through a solid structure". I thought about an inlet manifold and as I have a std Cosworth YB unit at home, I thought why not going this way !

But to give credit to my project I would also need to compare the model I'm gonna build with some other ones (aftermarket plenums).

There are few versions available, and of course I cannot ask someone to send me his plenum to make a 3D model out of it, but I would be happy if anybody has got 3D CAD models of these aftermarket parts !

I will then be able to compare flow characteristic in CFDesign and study other values.

Thank you very much in advance !

 

Im sure iv seen Ricky Lee post something like this on here. Maybe send him a PM

 

never did anything like that at school lol

good luck with it mate

 

Have a read here you will get loads of decent info.


https://passionford.com/forum/genera...than-this.html

http://forums.hybridz.org/index.php/...fd+%2Bmanifold

 

I've got full CAD drawings of Swedish/8 inj. plenum for cossies, can email them over?

 

Wow a lot of pages to read, yes I'm gonna have a look at that, thanks !

I will also contact Ricky !

And finally yes that would be great to get the swedish version, just send it to : mm.autoracing@gmail.com

Cheers guys ! Although the report will be written in french (my native language ) I will try to find time to make an English version if the results are interesting !

 

I'll send them over tonight pal...

 

You're a charm !

 

I haven't found Ricky Lee's username And Adam when you have time, can you send me what you've got too ?

 

https://passionford.com/forum/member...ickylee53.html

HTH

 

school project? wish they did this sort of thing at my school!

 

Sorry dude, I'll email them today... have to boot the old PC.

 

Thanks in advance mate ! And if anybody else has got CAD parts of YB Cosworth inlets, I would be happy to have them !

 

Sorry to bring this back to the top but I had no success yet in trying to get some CAD models

I haven't got lot of time to do this project, so I would really appreciate to get that material. I am modelling a std inlet manifold at the moment, but I would appreciate to get ANY manifold/plenum (std or aftermarket) !

Thanks in advance !

 

As I have to finish this small project in 2-3 weeks I've already done some modelling of a complete inlet with Swedish plenum (it is not finished of course, but that's just to put up an update). All was done by looking at pictures of the parts from internet (I am far from home so no access to my std inlet to take measurements).



My project is not to try to improve the plenum or to be 100% accurate with the design, it would take way more than 2-3 weeks, but just to get used to CFDesign after having modeled the parts. Maybe as a personal project I will try to do some improvement on this, depending on my free time, but its difficult. Tests every week, laboratories and projects going.

So I would really appreciate if anybody has got some CAD models of inlets/plenums to compare and also some technical drawing with dimension of inlets/plenums !

Thank you very much in advance guys !

 

I've got more time than expected to do this project, so I will make few models. I restarted the previous one because the software does not work with "solids" but with "fuilds" so basically I have to model the fluid volume.

So I am currently doing the std inlet, already done the swedish one, and I hope to do the one that can be bought from ebay (which looks like the std one in shape, but with improved entry and ports.

So really I would appreciate any technical drawings or models, guys !

 

While I'm still modeling stuff in 3D (I have now full access to a 3D scanner but its a pain in the ass to work with it, or I mean the post-processing is long and difficult), I've done measurements on the flow bench with the std inlet/tb and here are numbers :

Flow through the 4 cylinders : 125
Flow through cylinder 1 : 78
Flow through cylinder 2 : 85
Flow through cylinder 3 : 75
Flow through cylinder 4 : 66

Everything is given in [liters/s] and there is a diff pressure of 0.07845 [bar] between the machine and the exterior. Measurements were done using a std 4wd inlet with throttle body fully open, and blocking 3 exits when measuring the last one.

I've also measured the speeds at the exits of the inlet, just before going in the head, but its not so accurate because it is impossible to measure equally the cylinders.

So again, if you have got CAD models of other manifolds I could analyse them theoretically and see the accuracy I get with the experimentation I did on the std inlet.

And also if anybody dares to send me an aftermarket plenum/inlet I would be REALLY happy. I will pay for postage and everything.

Thanks for the reading that update ! More interesting stuff to come when I (finally) finish to make the 3D model. Again, it takes a shit lot of time because it is VERY accurate and it requires lot of work to adjust the things, and I've got lot of work to do in other courses too (Christmas rush).

 

Interesting reading this, hope you can get some other models flow tested aswell

 

Yes and I want to add I did measurements 2 times so accuracy is guaranteed. I also decided, as I wrote, to test the whole inlet+throttle body and not just the inlet, so the perturbation created by the throttle body fully open is taken in consideration. I was surprised to see a difference of 22% between the number 2 and 4 cylinders !

For such an engine I think it is quite a poor designed inlet manifold ! We are talking about Cosworth here, not the average citroen !

And just to give another number, air speed at the exit of the inlet cylinders holes was in the region of 80 [meters/s] for the best one, so that flow bench is not a pussy machine ! Here it is :



Holes are open there, but 3 are closed when measuring each cylinder.

 

Very interesting Matt - keep the updates coming! Good luck

Tom

 

Good stuff!

Are you using CATIA for your modelling?

 

Thank you guys for the support ! Yes Jim, I'm using CATIA V5 !

 

Very Interesting project

 

Very interesting and pretty much what we did and found. We were really disapointed our Evo intake had a 3% difference in flow from cylinder 1 to cylinder 4. (we think we've manage to improve this slightly but haven't yet tested)
Then we tested a stock one and some competitors and were rather happy.

Something we did find was higher was the flow across all 4 cylinders in comparison with the other 4 runners. Were you near the machines limits/was the pressure different?

Try testing the other way, pulling a vacuum through the runner you want to test with the throttle body fully open. Doing it this way means you can partially open the other runners and flow seperation.

I want a velocity probe and 3d scanner!

 

Nice project, I have always wanted to do a similar project but due to my lack of experience I would probably end up with a plenum which flows 30% from the STD.

Anyhow when my schedule allows it I'm going to take some fluid physics in my school also and hopefully get my intention of starting this project forward. I'm more interested in Ford V8 engines which manifolds seems to be different in every way compared to straight-four.

Your next project must be a better flowing cylinder head for pinto, huh?

Luetko kone- ja tuotantotekniikkaa vai mitä?

 

Ricky, no I was not near the flow bench limit, but I just set a basic delta-pressure on the machine so the machine could still flow enough air through the different tests. Yea the 3D scanner with the software is worth 30k£ !

jortikka, it looks interesting, let me (us !) know about your projet when you have the chance ! And unfortunately no I won't investigate in the N/A domain right now Jooo opiskelen konetekniikkaa ! puhun vähän suomea koska mun tyttöystävä on suomalainen !