Smaller pill, 3 port, tighten WGA, aftermarket WGA, bigger turbo.

 

So would it be safe to say that a MBC will produce the same large taper? Of course I would like a little taper, like 24 - 20 PSI, but dropping to 16 is killing me! I have a Forge MBC I could install in place of the ECU controlled boost, but I only want to go that route if there isn't a way to achieve my goals given my current setup

 

What is your mod list?

 

AMS 3" TBE w/ TP, AMS UICP (short route), Greddy Type RS BOV, Amsoil Filter w/ Vibrant MAF adapter, Omni Power 4-Bar MAP sensor, #58 DIY pill (located in line between compressor outlet and Tee), ECUFlash custom tune (well, in the process anyway)

That's it!

 

Pressure test for boost leaks. Have you replaced your throttle body shaft seals? If not, then they leak. Check the diaphragm in the Greddy BOV for tears.

 

Good thinking - sometimes we forget about the obvious. I'll make a pressure tester and try it out.

 

Does anyone have a patch for the Zeitroniz 3.5 bar map sensor scaling? I see it's already available for the SD setup but can't seem to find it for the boost control. Would I be better off just getting the 4 bar sensor? My map harness is already cut but I still have the connector & can swap it back if needed.

 

Last I knew, no one had dialed in the Map Sensor settings for ECUFlash to log/use the ZT 3.5 bar map sensor accurately yet (I could be very wrong, things move fast in this forum!). If you do find them though, PLEASE post up the settings!

 

Can't you log from the zeitronix directly? You could simply do a simulataneous log of the ECU bit value and the ZT direct boost pressure to start building an equation. Worst case you could scatter plot and to a best fit line in excel to get the correct formula.

 

^ Unfortunately I'm not too smart so almost everything you said just went over my head. :/ If there isn't already scaling available for the 3.5 then I'll just get an Omni 4bar sensor that has been scaled and tested. I searched but couldn't find info for the 3.5 and I just figured I'd ask before I went with th 4 bar. Thanx for trying to help but I'm no good with code and tuning stuff. And for the record I'm just tring to get everthing lined up before I get tuned. I am not setting up the SD, boost control, or tuning myself but I wanna get all the wiring & installation done before I go to the professionals.

 

I took at a stab at it a long time ago but only for an evo 8. I run the 5 bar sensor and only got a code once in a blue moon its been code free for around 4 months now.

https://www.evolutionm.net/forums/6563042-post582.html

The only bummer is the bit limitation does make the sensor somewhat choppy since the 8 bits only provide so much resolution.

Or perhaps you mean the conversion to the 3.5 bar settings for the base boost and boost adder tables?

 

Thanx, that may werk. Has anyone tested the 3.5 settings you came up with? I'm thinking I may be better off just getting the 4bar setup now. There are a lot more people using it so the support is bound to be better.

 

Probably better off with the better support. I didn't even know about the 4 bar option until after i set it up myself . Plus I wanted to get a 5 bar system working so someone out there could build a monster drag car with stock ecu and speed density.

 

Always do the BLT first when having too much taper. Also, I had a VIII and a IX and IXs taper way more. You can tune MIVEC to help hold boost also. And if you not already using one, an oren air filter will help you hold boost up top. And everything GST said.

 

Yep, the GM 3-port will kick butt over my bleed setup for pushing max boost.

A really easy way to get more boost out of the car is to do the "Help" WGA spring mod. Its ghetto quality, but its cheap, pretty easy to install, and can be removed more quickly than it was installed. I did it about a month ago. I thought it might make the car prone to "difficult to tune" boost spikes, but I have had zero issues with it. I was able to get another psi of boost in the areas where my system was at 100% WGDC. If you go with the mod, zero out your WGDC table to start because the spring has a huge effect on boost in the peak turbo efficiency range. Running E85 made me a bit fearless about boost, so I started off with no changes to my WGDC table, and intead of the usual 26 psi, the boost sensor pegged at 32.X psi when the turbo spooled in third gear at 3500 rpm.