Which electronic boost controller?

[turbo3six]

I'm trying to decide which electronic boost controller to choose.
My application: 79 930 K27S / TiAL 46 w/.8 bar spring / Andial longneck IC

Please share your opinions, pros & cons on which make/model electronic boost controller or aka electronic control valve should be chosen.

Thanks

[911st]

Why an EBC and what are you hoping to gain?

Do you want control over boost by rpm, by gear, or just boost level adjustability.

[turbo3six]

[QUOTE=911st;4660333]Why an EBC and what are you hoping to gain?

Yes, looking to gain adjustability...run at .8 mostly but with ability to dial in more boost when its time to push it a little more.

[mooney265]

[QUOTE=turbo3six;4660363]

Originally Posted by 911st

Why an EBC and what are you hoping to gain?

Yes, looking to gain adjustability...run at .8 mostly but with ability to dial in more boost when its time to push it a little more.

how do you plan to "add more fuel" when it's time to push a little more?

[WinRice]

I have run an HKS EVC 5 for about 5 years now with no problems. Works great and sets easy, also gives another source of boost logging.

But, just as the others have stated, you really need to have some kind of AFR logging to make sure you can fuel it at higher boosts. So be careful!

I use it to run about a .1 bar more boost than my normal setting in the cold months of the winter, less boost in the hot summer months.

[911st]

This may sound odd but it is actually in the winter months when we can run short on fuel with the increased air density which 930's can not really compensate for very well. Summer is elevated combustion temps. Thus, if one is on the edge of having enough fuel in the hot summer months, they will be short during the winter and risk going lean.

You can also roll your own programmable boost controller that can run higher boost then taper boost back to match any CIS fuel limitation using a Split Second AIC-1 with internal oscillator and a boost control valve. It has a second driver & map to also control one other item like an RPM boost clamp on the WUR to delay boost enrichment, help deliver more fuel by taking over the Lambda style fuel heads frequency valve, or trigger an RPM shift light.

Of cource, if you just want control over your boost level it is cheaper to just add a manual boost control valve.

[WinRice]

Originally Posted by 911st

This may sound odd but it is actually in the winter months when we can run short on fuel with the increased air density which 930's can not really compensate for very well. Summer is elevated combustion temps. Thus, if one is on the edge of having enough fuel in the hot summer months, they will be short during the winter and risk going lean.

Exactly! Higher air density, more fuel requirment. If (big if!) you have enough fuel, you can run a little more boost in the cold months. But, an EBC is like a fine Bourbon, best to be used in moderation.

Originally Posted by 911st

help deliver more fuel by taking over the Lambda style fuel heads frequency valve

I'm working on that one

One other nice thing about an EBC, is the ability to dial the boost down if you're experimenting with engine mods, then gradually increase it after a few logs have indicated everything is in check. One thing to note, an EBC can only go as low as the waste gate spring, 0.6-0.7 bar springs are pretty commonly used. One tuner recommended going 0.1 bar below your lowest boost setting, just so the EBC has full control.

[Thierry25]

Originally Posted by 911st

This may sound odd but it is actually in the winter months when we can run short on fuel with the increased air density which 930's can not really compensate for very well. Summer is elevated combustion temps. Thus, if one is on the edge of having enough fuel in the hot summer months, they will be short during the winter and risk going lean.

You can also roll your own programmable boost controller that can run higher boost then taper boost back to match any CIS fuel limitation using a Split Second AIC-1 with internal oscillator and a boost control valve. It has a second driver & map to also control one other item like an RPM boost clamp on the WUR to delay boost enrichment, help deliver more fuel by taking over the Lambda style fuel heads frequency valve, or trigger an RPM shift light.

Of cource, if you just want control over your boost level it is cheaper to just add a manual boost control valve.

Hello

If you want to get an idea about the setup ( AIC with one map for fuelling and one map for boost controle) you can follow this link.... This is french but from the picture you will get an idea... ( I am installing and tune this setup at present time).... the boost control via the AIC + frequency valve works very well.

http://www.club911.net/viewthread.php?tid=82831