Thread: 2.0 VE dyno testing

IMG_1649.mp4 video by spoiltone - Photobucket@@AMEPARAM@@file=http%3A%2F%2Fvid1261.photobucket.com%2Falbums%2Fii599%2Fspoiltone%2FIMG_1649.mp4@@AMEPARAM@@file=http%3A%2F%2Fvid1261.photobucket.com%2Falbums%2Fii599%2Fspoiltone%2FIMG_1649.mp4

I guess the ITBs meant for my DE wont work with the VE...i believe these are 48mm and might be too small for the VE head. Hmm...what to do.

They are a tad too small plus you have to change your velocity stacks for a curled set. Those looks like a set of EFI Hardware from Australia.
The other important thing is the shape at the exit of the ITB's. Most off the off the shelf ITB's are not suited for the VE as their shape are not ideal and will influence the end result.
I have done some testing in the past with a port guru and he showed me on a flow bench what difference in flow loss there are when the ITB"s shape does not match the shape of the port and up to 10% of flow could be lost.

Can we please get another video SR20GTi-r

I figured they would be..and im sure clearance would be an issue too. I got these EFI ITBS 6 or so years ago to build my DE but never got to doing it. Now that im running a VE, not sure if i still want to build the DE. So ideally, cutting the stock VE intake Manifold and flange it to fit an ITB system would remedy this since there really aren't any VE ITB's on the market unless it was custom built which is $$$. Thanx for the honest response btw. Much appreciated.

Well, in my humble, honest opinion (which I am happy to share but generally get bitch*ed at for expressing).

Answer:
Because just from looking at these I am estimating the overall length is below 1.25ft (perhaps I'm wrong??).

If these runners are shorter, then these will not even be close to the correct harmonic for an engine redlining at 8-9k. Will they sound sweet? Make more power then stock? Look cool? Cost allot? Yes.

Self Justification:
I spent the past two years of my college career designing testing and modeling intake and exhaust systems, I guess that's why I made the comment. Not trying to come off as an arrogant ass*ole (that's what they called me on the Audi forums anyway). Just this stuff can be very complicated therefore it gets a bit technical quickly and requires an honest and thorough understanding of physics, acoustics, and engine properties.

If you don't believe me check out bmw's E39 M5 stock intake runners. They are in the ballpark, most aftermarket kits aren't close.

Rant:
If anyone thinks runners are purposefully made shorter for "highend". I would welcome an educated honest explanation as to how this allows more air into the cylinder generating more power (please spare me the wiki inspired answer).

Explanation:
The length of the runner is a beautiful relationship that involves the valve open time, engine rpm, desired peak tq/power RPM, the density of the air, the acoustic properties of the waves traveling through the cylinder and in the runner, and a few other things not worth mentioning here. And yes, math can explain it. Math can get VERY close. I have seen it, done it and experienced it. It's a pita to get right!!

Excessive Technical Blabber:
Diameter takes on a similar set of calculations, however engine displacement and valve throat area becomes the driving factor here. I would be interested to hear what consideration these manufacturers have put into this. The diameter of the runner will be limited (like an exhaust) by the effective valve area, but most will just make it larger for "more air". This is wasting power.

Conclusion:
Anyway. Again, not trying to stir up a pot of "you don't know sh*t" here. But you asked so I am offering my opinion through my experience. Have I ever built an SR2.x engine? Not yet! But very soon.

Attempt to Relate to Community:
And I do really like to read these threads to see what we have going for us (I have been here awhile!). Nothing is perfect everyone knows this, and gathering experience/testing is an awesome way to improve the designs. I'm always open to talk technical if anyone likes to do so in a civilized manner, as I love to write way more then is necessary.

Regards,

Walker

Fyi, without going crazy again, and not knowing your exact setup (2.0L?, redline?) or the stock valve diameter/lift off the top of my head. That is nearly the perfect diameter for a 2.0L revving to 8.5k (imo what I would choose). I like the look of those trumpet openings too, the taper is close and the bellmouth is also competitive.

Walker

Walker, thankyou for that. I will take a look at my ITB's again and see if i can compare/match the ports of a VE head to it and see if i can somehow get them to work. If i can use my current ITB's, that would make my build so much easier and possibly give me another 20+ years of enjoyment on my SE-R.

This is why I so dig this community! You guys ROCK!

Walker,

You have earned your ticket onto the crazy train which is headed up by some other neat members such as myself.

Regards,
Kyle

You do realize that these were specced for a big 2.4 right...... not the 2.0.