2010 Full Dezod Alpha Series build... !!UPDATE!! NEW PIX
06-09-2013, 02:24 PM
#181
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06-09-2013, 11:27 PM
#182
**Dave was running open downpipe as well which promotes creep.
06-09-2013, 11:46 PM
#183
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Well, not entirely accurate. He added the second wastegate to get down to 6 PSI on 2step on his 35R. We did not design and intend for the Alpha to run a 35R at 6 PSI. (That's a waste quite frankly) Simple physics will tell you the lower the boost on the bigger turbo needs more wastegate to help bypass it to keep the boost control in check. The more boost you run, the less wastegate you need. World did this with their "Punisher plate" essentially eliminating the boost controller and letting the turbo make as much boost as it wanted.
**Dave was running open downpipe as well which promotes creep.
**Dave was running open downpipe as well which promotes creep.
Just going by what he said on FB. Instead of paraphrasing, I'll just cut a conversation.
Originally Posted by Dave Sher
Be able to manage boost low and going for 30+ psI. With boost by gear
Originally Posted by James Davis
what issue did you have? i run way less boost than you but i have had 0 boost creep on my alpha.
Originally Posted by James Davis
let me rephrase that. why were you experiencing boost creep and how many psi?
Originally Posted by Dave Sher
I was open downpipe the first time when I went tuning with an 8psi spring in the gate. With the intensions of setting up boost by speed.
Originally Posted by Dave Sher
Spiked to 21 psi.
Originally Posted by Dave Sher
Then tryied to regulate it with the ems using the mac boost control solenoid. And was not regulating anything.
Originally Posted by Dave Sher
The secong time put 15psi spring pressure and the same thing. Still didnt regulate and came to a conclusion that I was hunting boost.
Originally Posted by James Davis
i run 10.5 and i haven't had an issue. maybe your gate was defective?
Originally Posted by Dave Sher
The exhaust wasnt bleeding enough out of the wastegate port to reduce the manifold pressure so the only way out was through the turbo.
Originally Posted by Dave Sher
So we cut tuning short once again with the same numbers. Goal was to set boost by speed, tune to 30+ psi and make rediculous numbers.
Originally Posted by Dave Sher
But when I put my exhaust on did see a tad drop. With a 13psi spring I still got creep to 19 psi.
Originally Posted by Dave Sher
Tuning was stopped with a redline to 7000rpm with boost cut at 21 psi.
Originally Posted by Dave Sher
Tried 3 different gates
Originally Posted by Dave Sher
Trust me was pulling my hair out on this. Researched it and was told by my tuner and a couple others. My options were bigger gate or dual gates and possibly full exhaust. So this time around im going dual and bringing my exhaust with me.
Originally Posted by Dezod Development
James Davis open downpipe removes the back pressure and alters the ratio at which boost is regulated. That is why Dave was creeping. Not to mention he was running a high flow IM, Head and the open downpipe. WAAAY more air in and out than what the manifold was tested and designed to run.
Originally Posted by Dave Sher
and this is all true. so i'm trying my best to figure ways to go about this. little r&d and play around with stuff here and there and see what i really can press out of this. Putting in work.
Last edited by rhythmnsmoke; 06-10-2013 at 12:14 AM.
06-10-2013, 12:29 AM
#186
Boost by vehicle speed. I spoke to Dave about how to solve the problem on a few occasions and what he wanted, adding the gate to get down to 6 PSI on a 35R during 2 step was the only option with open downpipe.
We have quite a few Alpha manis outstanding and nobody whom has an exhaust has issues with boost control including Steve's car at Vinny 10. He runs 13, 21 and 24.5 PSI for his car. Control on all is fine. He has 3" straight pipe connected to the 3" s-pipe.
We have quite a few Alpha manis outstanding and nobody whom has an exhaust has issues with boost control including Steve's car at Vinny 10. He runs 13, 21 and 24.5 PSI for his car. Control on all is fine. He has 3" straight pipe connected to the 3" s-pipe.
06-10-2013, 02:02 AM
#190
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I feel you on that. I guess more like can't wait till I reach a breaking point and enjoy the vehicle for a while before the next level.
06-10-2013, 01:12 PM
#193
We can easily add a gate if you wanted, however we will not produce any IC kits with the Alpha to leave the customization as wide open as possible. So if you want something like this you can do it, if you wanted custom water to air IC, you can do it etc.
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