Just a quicky. If you fit bigger turbos is the boost automatically raised or will it still be governed by the evc4?

depends on the wastegates that go with the upgraded turbos.

It will still be governed by your boostcontroller though, but you'll probably have to readjust the duty cycle.

 

-Eric

 

[This message has been edited by lymon (edited 18-04-2002).]

what is the duty cycle?

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

Duty Cycle is the pulse width(time between pulses)- this timing controls operation of the actuator - Correct me if i'm wrong anybody!

Originally posted by lymon:

depends on the wastegates that go with the upgraded turbos.

It will still be governed by your boostcontroller though, but you'll probably have to readjust the duty cycle.

 

-Eric

 

[This message has been edited by lymon (edited 18-04-2002).]

 

Well said Eric... I forgot to adjust my acv-r duty on setting B and sent the boost needle on my gauge flying past 21psi.

 

Could of blown the heads clean off

 

 

[This message has been edited by Steve E (edited 18-04-2002).]

How do you know what to set it to? Am about to install an HKS EVC 4. The car has JWT Sport 500 turbos, JWT ECU and 555 injectors. Am very concerned to get the settings correct.

Low - 14.5psi

High - as high as it can go without causing pinking/detonation. (sopmething above 16.675psi)

Scramble - High +0.1psi for 10 seconds duration.

Auto Adjust Mode - off

Now what about this duty cycle setting? Are there any other settings I should be considering too?

 

I want the power but not so much that I end with needing engine repairs.

 

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

John, did you use the selflearn-mode again after fitting the new turbos ?

Otherwise it will use the settings it "learned" from your previous setup.

 

The EVC4 doesn't really allow you to adjust the duty cycle yourself, but you can adjust something in the socalled "offset mode", which is similar to adjusting duty cycles on other bc's

 

Just to be safe set the boostwarning to something like 1.3 bar, so the controller won't be able to override it and go from there.

 

The boost controller is to be fitted now that all the other upgrades have been installed. So the boost controller is new and therefore still virgin. I have asked JWT, Stillen and the TT.net forum who I expected to have more experience in the setup I have but so far F*** all back from them. Hoping someone on here may have a setup close to mine.

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

John, with your current setup you should easily be able to boost up to 20psi/1.4bar

....although I don't know if any other enginework was done (eg. pistons) and if

the headgaskets were replaced/upgraded also ?...because this may be the bottleneck at the moment.

 

Even if there would be someone on here with the exact same setup,

the settings of the bc will most likely be different, since every car/engine is slightly different.

 

 

[This message has been edited by lymon (edited 19-04-2002).]

20psi? Are you kidding me? I was warned away from going any higher than 18psi/1.24bar on the 300 without major engine work. So far I have added the upgraded Sports 500 Turbos, 555 inj and JWT ECU, silicon hoses for radiator and turbos, the rad and water pump have been replaced, the auto box had a recon including replacing the torque convertor but everything else on the engine is stock as it came from Japan. The boost jets that were supplied with the JWT ECU/turbos were fitted instead of a boost controller at the time of installing the new turbos and it is only now that I am adding the boost controller in the hope of making use of the extra power the upgrades should have in them. So do you still think the high or scramble could go as high as 20psi?

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

Ok..since you haven't had any further engine work done I would keep it at 18psi max. for the time beeing.

I don't see any bigger intercoolers in your list of upgrades either, so I would strongly suggest to get those also.

 

The stock engine however should be able to handle 20psi scramble boost....unless the engine is in bad shape.