600 wastegate question

[GWoody]

On the 600 there is an electronic solenoid on the turbo that has a hose going to the wastegate. Does the ecm have to send a signal to this to open before the wastegate will open? Or does it close it under certain conditions to help acheive a little higher boost? I'm curious how this thing works.

 

[jwilliams3]

The wastegate controls this unit.

Yes, I think it does help to acheive higher boost under certain conditions.



--Justin

 

[mattymac]

Originally posted by jwilliams3

The wastegate controls this unit.

Yes, I think it does help to acheive higher boost under certain conditions.



--Justin

I thought that the map sensor tells the ECM how much boost is being made then the ECM tells the wastegate sensor when to open. The electric vavle stays closed on acceleration for fast spoolup then opens to limit boost (for emmisions of course). If you have gauges you can see whats happening but If your running a chip and "boost fooling" the electric valve doesnt get a signal because the ECM sees less boost and doesnt open the valve letting air get to the wastegate actuator thus opening the wastegate and dumping exhaust drive pressure and sending the turbo out of orbit.

 

[SP Diesel]

Originally posted by mattymac

If your running a chip and "boost fooling" the electric valve doesnt get a signal because the ECM sees less boost and doesnt open the valve letting air get to the wastegate actuator thus opening the wastegate and dumping exhaust drive pressure and sending the turbo out of orbit.

You are right if it is not done correctly... . If done correctly you can achieve higher then stock boost levels with modified wastegate controls electronically while still avoiding the overboost codes in the ECU.



One of our test 600 trucks is modified to have the wastegate open and maintain up to 40psi on a stock turbo setup with no overboost code or defueling.

 

[GWoody]

"One of our test 600 trucks is modified to have the wastegate open and maintain up to 40psi on a stock turbo setup with no overboost code or defueling. "



SP, have you tried this on an automatic, I'm curious about excessive turbo bark running 40 lb. of boost and the sudden rpm drop when the transmission shifts.

 

[SP Diesel]

We have not tested boost upto 40psi yet on an automatic yet, but it is something we will definitley be testing before we set the boost high limit on our power module.



Turbo stall is definitley something that should be considered as well as turbo surge. Fortunatley the Dodge's stock turbo housing has radial slots built into it to help both surge and stall issues.



The 6speed trucks tested have not exhibited any turbo surge or stall to date, even with boost as high as 45psi.



We have not decided yet, but we could very well have two different versions of our programing for manual and automatic transmissions.

 

[GWoody]

Can you tell us what type of box this is going to be, pressure, timing, duration????????

 

[SP Diesel]

Sure, fuel pressure, boost, and timing will be directly effected, duration will change as an indirect effect.

 

[EEngel]

New box

SP Diesel,



Will the overide for the wastegate be programmed as well?

 

[SP Diesel]

yes the wastegate will be controlled electronically, no boost elbow should be required on the 600 engine.



03-04 motors will still need to use a boost elbow since they have mechanical wastegates.

 

[EEngel]

New box

SP Diesel,



What is the release date on the new box, and what will it be labled under?

 

[SP Diesel]

Assuming everything goes as planned we are trying to get the module to market by the end of the summer.



It will be labeled under SP Diesel.

 

[EEngel]

Info

SP Diesel,



Thanks for the info. I will keep an eye open for a post stating that you released it.

 

[GWoody]

SP, can you tell us what hp and torque ratings are on this product and also will it be adjustable, if so, from in cab or under hood?? Also, please tell us that we can run on the max setting from 0 to 110 with no egt issues!!!! Oo. Oo. Oo. Wouldn't that be nice in a 600!:--)

 

[SP Diesel]

We're not going to release the HP/TQ numbers until we have good dyno graphs to back it up.



The product will be fully adjustable on the fly from in the cab, from 0 to max power.



Your EGT question may depend on how far we decide to push the fueling up top. The nice thing about the module will be that if you are towing you can tailor the power to the load your towing and the EGTs your seeing.

 

[Scooby]

O



SP, have you tried this on an automatic, I'm curious about excessive turbo bark running 40 lb. of boost and the sudden rpm drop when the transmission shifts. [/B]

An automatic truck up-shifting will not get any bark out of a turbo only pushing 40 lbs. of boost. I had an auto that hit 39lbs. prior to getting back into a six speed.



You should expect a "bark" on manual trannies moreso than autos. The drop between shifts on an auto isn't that much... maybe 500 RPM or so. It's not like a manual transmission where depressing the clutch will result in a drop of the RPM to idle speed (if you let it). The worst scenario is on a manual transmission when you accellerate to redline and then just side-step the go pedal. Then you'll get a BARK!