Tial MV-S (38mm)
What is a DV?

Here is the completed setup...

http://www.eng.fsu.edu/~jthagard/EVO...roll/done1.JPG
http://www.eng.fsu.edu/~jthagard/EVO...roll/done2.JPG
http://www.eng.fsu.edu/~jthagard/EVO...roll/done3.JPG
http://www.eng.fsu.edu/~jthagard/EVO...roll/done4.JPG

FYI, DV is an abbreviation for diverter valve. Are you running the stock DV, or an aftermarket blow off valve?

I was just hoping that your TS GTX3076R was going to spool up a tad quicker for you. So, I was thinking about the relative looseness of the 1.06 housing, the diverter valve if stock being uncrushed and thus softer. Also I was wondering whether the internal springs of the Tials. Did they come setup with the 10 PSI, or the 14 PSI single spring?

The DV is stock, but I tested it up to 35psi and it did not open.

I had the base springs set to 22-24psi(can't remember)

As far as spool, the tune has not been touched so I suspect Tom will be able to increase spool by a few hundred rpm. In my opinion the spool is good considering it is a stock motor/head/cams/intake with a 64lbs/min turbo and a 1.06 a/r T4 housing.

Oh, and BTW, that is a neat looking dual gated setup. It's great! So, compact.{thumbup}

I never heard of a stock DV that opens at 35 PSI. There are some units that don't open fully until 25 PSI though. But, to my understanding these are the exception. Eventhough it may not open fully until 25 PSI they generally crack at between 11 and 14 PSI and then from that point on they tend to slowly continue lifting until fully open at 25 PSI.

To maximize spool up you may want to crush it(the DV) ever so slightly. Just put it between two wooden slabs to cushion it between the jaws of your bench vise and set a socket ontop of the hat that is about 1/4" smaller than the hat in overall diameter(maybe its a 17mm or 19mm). Tighten it down just enough so that the socket sinks the hat in about 1/8" in depth, not any more than that though.

Yeah Tom will be able to mess with the Mivec to optimize your spool up too, pulling out low end ignition timing and leaning it out too.

Since you have twin 38mm WG's, and under normal conditions a single 38mm should be sufficient to control boost on that turbo then you have twice the venting surface area needed to control that turbo. Blessed with twice the valve area you only need to have them open half the time that you would if you only had a single 38mm gate.

What I am getting at is that if you only had a single gate you would need it to lift sooner than your dual gate setup. Your two valves can stay on their seats longer before starting to lift. Thus, you should run as stiff of a spring as possible in them.

I understood that those Tials come with a maximum of 14 PSI single spring. And, that if you want higher rate you need to add a second smaller helper spring. Probably you'll want the red helper springs. Or are your WG's already fitted with the helper springs?

As far as my personal taste is concerned, on a street driven 2 liter engine I might opt for the slightly better turbo response of a .82 TS housing if available, for that turbo.

I pressurized the turbo inlet to 35psi, which pressurizes the IC pipes and DV. At 35psi the DV was not leaking. Unless I am off base or overlooking something this is not an issue affecting the setup. I can always try to plug the DV hose to see if spool is affected.

I just told my turbo guy 22-24psi and he setup the springs before shipping.
Tial Spring Settings

Nice Fab and design work! Looks sick.

Looks good!!

Interesting. The question, is the TS manifold working THAT well?
Or was the Revhard manifold just THAT bad...

Spool wise, it looks to be similar to the response David saw on his GTX3076R, but with a 2.3L with head work and cams.

It seems to be doing the trick. Interested in seeing what kind of power it can make.

well you cant say its not tuned.. because it is. the mivec is optimized a good bit already.. i could take away the mivec changes and the spool will drastically be effected so its not fair to say its got lots more spool in it with mivec.. because it doesn't. it may gain a 100rpm quicker, it may not.. i will have to sweep the mivec table to confirm that myself.

but the response difference is drastic.

heres what we got so far:

http://tscomptuned.net/_images/dyno-evo8.9/graph.jpg

its a drastic before & after.. but something else needs to be kept in mind the weather. the air is colder and more dense as well.

http://tscomptuned.net/_images/dyno-...mp-compare.jpg

this is with no additional tuning.. just from the before tune & after overlay. im sure i can extract more power from the car.. just need to play with it some.

sparky is right. just because its not leaking on a leak test doesn't mean its cracking open.. in fact i guarantee its leaking when you're driving it and putting it into a real boost situation. maybe not a lot, but enough to sacrifice some power due to the turbo creating additional heat to make up for that air leakage.

was the 2.3 with mivec though? the mivec really makes a huge difference when its tuned just right.

looks great man! super clean.. just as i expected from you.. clean freak like i am. that manifold looks great. nice work. and now its functional in a positive way :)

I looked at his post and saw the following, but as you said apples to oranges comparison.

Dave 4k - 29.9psi
Mine 4k- 24.4psi

My intent with the project was to create a platform that allows for options in the future should I choose to upgrade. I also saw the FP Black did well with a stock ported manifold, which was a short runner twinscroll design. If my results are similar to an FP Black BB on a stock IX motor/head/cams/intake/tb then I think I am satisfied as I believe the topend potential will be greater with the 1.06 T4 TS housing. This will require that I get cams and intake to verify.