Controlling Boost with a Flash ECU?

[Greg E]

Advantages to this vs using lcdbc? Curious as I as most are looking to use the best solutions to date...

The stock ECU will retard duty cycle based on TPS, knock and coolant temp. Being load based instead of psi based it'll adjust the airflow for temperature and Baro pressure as well as what gear you're in (if you setup the corrections properly).

Ill be honest I'm not familiar with how Anteros setup works though.

A major disadvantage is you have to flash the ECU for every change. You can't play it wit on the fly.

Has anyone ran those solenoids up to 35 psi or just 20-25? I'm looking for something with quite a bit of headroom if I replace my Hallman or Mac solenoid.

25 psi has been the max tested so far but the WGDC was still below 100%. Keep in mind you can run higher psi wastegates and thus back off the duty cycle of the solenoid.

[CoopKill]

So probably 3-5 flashes to set threshold, and no need to mess with till fuel, or parts change that would affect the tune.

[CoopKill]

One more question: Since switchable fuel maps are likely, could the boost setting be tied in to switch with the maps? I am guessing not due to needing a spare condition switch, or something of the kind, but PLEASE say yes!

[Greg E]

So probably 3-5 flashes to set threshold, and no need to mess with till fuel, or parts change that would affect the tune.

Yeah. After it's set, you can forget about it.

One more question: Since switchable fuel maps are likely, could the boost setting be tied in to switch with the maps? I am guessing not due to needing a spare condition switch, or something of the kind, but PLEASE say yes!

Yes, switchable base WGDC and target engine load maps are in the future!

[sergechronos]

All this information about things to come just makes your posts lately full of win Greg.

[TurboSinceBirth]

25 psi has been the max tested so far but the WGDC was still below 100%. Keep in mind you can run higher psi wastegates and thus back off the duty cycle of the solenoid.

Ok cool. I have 22 psi wastegates so it should definitely work. I wasn't sure if it was strong enough to handle it. I'll probably try it out after awhile but will be tuning the flashed ecu first after I get it installed.

[99 vr4]

I am probably the only one who has been running this setup with the STOCK boost control solenoid and has been since I started making the Clone ECU!

BUT - MILEAGE MAY VARY!

If you have 13Gs or lower and only want to run 15 PSI, then there is no need to change the solenoid!

This is not the optimum for anything over MHI 13Gs.

Let me stress this again. IF you have STOCK 9Bs or MHI 13Gs, with no other upgrades, and you still have the stock vacuum hoses with the stock Boost Control Solenoid (BCS), the ONLY thing you have to change is remove the restrictor from the nipple closest to the plug on the stock BCS (also known as the "free boost mod").

In order for this to work, the stock restrictor pill (brass pill) must be in the hose by the four way tee (this is how the system came from the factory). You also have to remove the restrictor from the stock BCS (some call this the “free” boost mod).

I run 15 PSI using 15Gs which bleeds down to 13 PSI at ~5000 RPM due to the 15Gs flowing too much air.

FYI, I am testing v2.5 of the ECU which will run the MAC, GM, or any BCS you can think of!

Brett

[striker2]

I wonder if anybody that doesnt need boost control (perhaps using an LCDBC or an N/A) would be willing to trade a VR4 ECU for my 99 SL ECU? Might have to post up in the classifieds.

[D.I.P.]

sweet write up! i'll have to run through EVERYTHING in my garage to see if i still have the FPR Solenoid. any easy way to distinguish it from the others?

[NOMIEZVR4]

FYI...it seems the 99 harness is a slight bit different than previous years. I know for certain the 95's and below have the 6 pin harness plug(on far left), the newer cars have the 4 pin plug. The picture above is the older harness...Greg's pics have the newer harness. Don't mind the circled solenoid, its the stock BCS.