Brokendown
CEG'er
I have been doing a ton of research into this as I am wanting to my 3L right. I was thinking about doing a port matched swap because I want to use my SVT UIM. As I was sitting in my Airflow Analysis class I started thinking about this stuff...The reason the secondaries work on the 2.5 heads is because there are two separate ports all the way through the cylinder heads. But in a portmatched 3L head, there is one port for both the open runner and the secondary runner.
So in reality, keeping your secondaries is pointless because the air will just go around them and actually terribly screw up the swirl effect the engineer designed the 3L cylinder head to create. But gutting the LIM will also reduce power because the air slows down so much.
I guess my point and question, which I am sure people have discussed and if the lack of a tune is the issue I understand. But why don't people just use the 3L LIM and then port match those for the SVT UIM? Theoretically, the 3L UIM would be better use, but people want to use the SVT UIM for looks and ease and all that stuff. I want to use the SVT UIM because personally I think it will flow better than the 3L UIM, as far as N/A is concerned. But I will be doing tests on the flow bench to find out which one would be ideal. Plus using the 3L LIM would allow the use of the 24# injectors that come on the 04+ models which would be a nice addition with a 65mm Mustang TB...
Also, I am not saying I am right, hence why I am posting this and wanting your feedback. Please don't be offended or attack me for what I say. I am man enough to admit when I am wrong.:laugh:
So in reality, keeping your secondaries is pointless because the air will just go around them and actually terribly screw up the swirl effect the engineer designed the 3L cylinder head to create. But gutting the LIM will also reduce power because the air slows down so much.
I guess my point and question, which I am sure people have discussed and if the lack of a tune is the issue I understand. But why don't people just use the 3L LIM and then port match those for the SVT UIM? Theoretically, the 3L UIM would be better use, but people want to use the SVT UIM for looks and ease and all that stuff. I want to use the SVT UIM because personally I think it will flow better than the 3L UIM, as far as N/A is concerned. But I will be doing tests on the flow bench to find out which one would be ideal. Plus using the 3L LIM would allow the use of the 24# injectors that come on the 04+ models which would be a nice addition with a 65mm Mustang TB...
Also, I am not saying I am right, hence why I am posting this and wanting your feedback. Please don't be offended or attack me for what I say. I am man enough to admit when I am wrong.:laugh: