Recent content by CosRush

quote]patprimmer You can then easily experiment with volume by using spacers at the split line. This has been done for about 2 years now, but nobody has any decent testing information with regards to the overall effects, other than to say it improved throttle response........ I also agree...

Thanks for that :-) Ive decided though for the time being to use the standard plenum until such a time that I have available time and money and tooling to design a better plenum for my engine. I personally would not be happy until I knew the airflow was as good as (but preferably better than)...

Thats exactly why I think this is such a complicated area to do in a low budget DIY way. Manufacturers spend millions of pounds designing similar components, which is why I think anybody who considers making one themselves will either get a rough compromise (which many would live with) or get...

Some companies do use them, Isuzu for example. http://img.photobucket.com/albums/v385/CosRush/34b4_1.jpg Im very interested to see the results of any design and testing you carry out. I hope you keep us updated on any progress. I would suspect the best enviroment for testing though would be...

I think I see what you are saying but I wonder if its all that relevant. The time between the plenum being unpressuried and then pressurised at say (on my car between 3500-4000rpm) is so quick that any irregularities in the induction stroke at that moment between each runner will surely be over...

Jbthiel said: "As for balancing flow I would first consider an air splitter or deflectors inside of the plenum. This type of thing is done on the 70's Trans Am style of cross-ram manifolds with the large flat plenums. They had lots of problems with air and fuel distribution." Ive also seen...

Jbthiel, My sentiments exactly............. It matters not whether the engine is N/A or boosted, at the end of the day the N/A engine still gets 1 bar of atmospheric pressure where as a boosted engine might get 1.5bar. Any restriction to flow in design i.e. unsmooth casting lines in...

Deltona, Where did you obtain your plenum body pieces from??? were they custom made??? I see you have been looking at the Ford Sierra Cosworth inlet plenum. Is that because you were intending using it or modifying it in some way. It is indeed the original 2wd inlet plenum you have pictures of...

I would suggest that instead of a slot, the whole interface of the plenum body and the inlet be opened up to increase maximum possibly flow.

Thanks for the reply and the pictures...... The 1st and 2nd pictures you have linked are exactly what i'd been considering making. Here is a picture of one a friend of mine made......... It worked out very well and looks awesome considering he made it by hand...

Thanks to all for the replies. Womble, The Standard plenum actually flows slightly more air to No.3 than all the rest. The inlet section to the plenum is not actually central but slightly offset towards No.3, and this being the inlet means the shortet path toNo.3 allows for a path of least...

Thanks to both of you for the replies. I'll investigate it further. :-)

Before I post this question, i'd like to say that I have serached through the forums using many different keywords to try and get an answer to my question. I apologise in advance if the answer is somewhere on here and that I have just missed it. Information preceeding my question:- My stock...