bdis3

iTrader: (3)

I totally agree with Paul. If you want to run 14 psi lowest, stick a 14 psi spring in the wastegate, and then you boost creep should be minimal to none until you get around 30psi.

bluesciontc

I do not have any creep in my setup.

paul_dezod

Disa man speaka da truth.........

13 PSI spring pressure on wastegate only



Boost curve holding 21 and 24.5 PSI, same car and setup



Same manifold. Same gate. Same turbocharger. Same 3" downpipe.

silvrtc300

iTrader: (1)

not knocking it. just trying to get a lower base for anti lag at launch. If i can't work it then just have to move up in gate-spring. but that's it for now..

silvrtc300

iTrader: (1)

i didn't have the springs to switch it out when i was there. but will have another appointment shortly here to get this thing pushing some more numbers in the very near future

bluesciontc

low gate pressure has nothing to with launch control. it has to do with tuning and the amount of load you can produce with said tuning.

blown_xa

The exhaust set up may be different between you two, and maybe the cams/ headwork... I don't know the details of the two setups. I see the waste gate angle is actually away from the flow going into the turbo, so maybe that is the culprit. Remember, you are waste gating flow, not pressure.
If you want a quick fix, we sell "boost discs". All it is, is a machined disc which goes in between the v band flanges on the down pipe. 3" outer diameter and your choice of inner diameter. This allows for a slight bit of back pressure on the turbine, enabling better waste gating. I don't think we have them on our site though, but give us a call if you want one.

silvrtc300

iTrader: (1)

The lower spring gate pressure during that antil/lag or 2step will set the boost for the launch. SO, how much load is on your car at 2step? NONE. cause your at a stand still.. You launch at 7 psi on a 2step is easier controlled than launching at 15psi.

silvrtc300

iTrader: (1)

Nah I'm good. thanx.

bluesciontc

No disrespect at all but from what you just wrote shows me that you have no idea how launch control or anti lag works, or tuned. Or even understanding how boost is even created. So there for my conversation on this subject is done, because there is nothing that i could tell you to allow you to understand.

thendawg

iTrader: (2)

Biggest factors that Ive observed that influence launch boost psi is launch rpm and timing retard. More timing retard = more boost, higher rpm = more boost. I run 17psi WG spring and have never seen over 8-9psi on 2 step.

bluesciontc

Exactly^

paul_dezod

Retarding tons of timing and adding tons of fuel causes the mixture to ignite practically in the manifold or turbine housing which creates an intense spike of EGTS therefore causing boost to occur at a preset alternate rev limiter defined by you. (2step by definition)

rhythmnsmoke

That's what I thought from reading the guide for setting up 2step on the ultimate. That how much boost you build was based on the timing you tuned into the 2step. And how long or far you set the VSS (I think its called) will aid in traction to reduce wheel spin.

trd07tc

iTrader: (-1)

give up on the ultimate's launch control

rhythmnsmoke

Do you think I really care?

crush02342002

iTrader: (2)

lets be respectful and helpful here peeps

silvrtc300

iTrader: (1)

its what ever. I had in mind a way I wanted to set up my car. But i'm done arguing over the fact. I got my numbers, had an issues while i was on the dyno, now know what needs to be done. Fixing my issues and heading back to the dyno. Still have a lot more room to play with, plus I still have to get couple more pulls. I have my pump gas tune almost done, and then it's race fuel.

silvrtc300

iTrader: (1)

Yes this is what i was trying to accomplish. It's boost by speed on the ems. This is how we setup the Drag Integra we have. Just one of the issues that I had on the dyno. I got to link the vss into my ems. And Evans really wanted to help out with this, cause he was really impressed what the car was doing, no knowledge and the first time tuning a tC. We had only spent a couple of hours tuning, made a few pulls. So i'm just fixing my issues and heading back up.

silvrtc300

iTrader: (1)

or I can eliminate creep all together and run how i want to run. Sorry brian, I don't have awd. I have to compensate for the massive amount of wheel spin that i'm about to endure. Plus I have hondas and vetts to go chew up.