Help Please, Greddy-e01

[RBChris]

Can you help me please understand a few settings on the Greddy -eo1

Current

1. High boost 'set' value is 60% & running 18.5psi

2. The Gain value is 15

3. My Start Boost value is 10psi

I would like to run about 15psi which i'm guessing will be around the low boost 'set' value of 49 BUT

How do I change from the low option to high boost, is there a shortcut button on the hand controller or do I need to go through the on-screen menu?

I have read that the 'gain' value should be between 3 - 7% of the 'set' value for a better & flatter torque curve is this true? I want the boost to come on strong

should I leave the gain where it currently is?

I have also heard that the Start Boost value determines when the wastegate opens, does this mean I should set it to say 14psi, 1psi before my 'set' value?

I have attached a photo of my current settings.

Thanks for any Help

Chris

R34GTT

3071R

Edited January 1, 2010 by RBChris

[GTScotT]

the greddy ebcs generally have 3 values to adjust. Set, Gain and Set gain. Set is the boost pressure you want to run, as youve mentioned. Gain is how it cycles the solenoid in order to maintain boost and Set gain is at what boost level to begin opperating the solenoid.

If your Set gain is set too high you will spike BUT if its too low it will be harder to reach your target boost.

How I normally tune these things is drop the gain down to its minimum value (i think its 10?) and adjust my Set gain to 1 - 2 psi before my target boost. I then dial in the Set to match this and keep turning the Set up until I reach my target boost.

Boost will probably tail off in the higher RPM so what you need to do then is up the Gain untill it begins to spike, and back it off an increment at a time till it stops spiking. Do it in 4th gear at a high load point that spools fairly quick tho, to get ur spike right.

If you dont end up holding the boost till redline what you can do is use the warning function to drop your boost when you overboost by 1 or 2 psi and run a higher gain to help keep the boost up in the higher rev range.

GL, I hope this was helpful.

[RBChris]

the greddy ebcs generally have 3 values to adjust. Set, Gain and Set gain. Set is the boost pressure you want to run, as youve mentioned. Gain is how it cycles the solenoid in order to maintain boost and Set gain is at what boost level to begin opperating the solenoid.

If your Set gain is set too high you will spike BUT if its too low it will be harder to reach your target boost.

How I normally tune these things is drop the gain down to its minimum value (i think its 10?) and adjust my Set gain to 1 - 2 psi before my target boost. I then dial in the Set to match this and keep turning the Set up until I reach my target boost.

Boost will probably tail off in the higher RPM so what you need to do then is up the Gain untill it begins to spike, and back it off an increment at a time till it stops spiking. Do it in 4th gear at a high load point that spools fairly quick tho, to get ur spike right.

If you dont end up holding the boost till redline what you can do is use the warning function to drop your boost when you overboost by 1 or 2 psi and run a higher gain to help keep the boost up in the higher rev range.

GL, I hope this was helpful.

thanks mate, that was very helpful. so if my turbo can quite easily hit my desired boost level even @ high rpm it's better to have the gain up for better response and perhaps drope the set level a little for best results?

Edited January 1, 2010 by RBChris

[RBChris]

thanks mate, that was very helpful. so if my turbo can quite easily hit my desired boost level even @ high rpm it's better to have the gain up for better response and perhaps drope the set level a little for best results?

also mate, do you know if there's a button on the hand controller to change between low and high boost?

and also what is the 'peak hold' setting?

Edited January 1, 2010 by RBChris

[JonnoHR31]

peak hold leaves the highest boost reached on the screen for a few seconds afterwards so you can look after you back off.

usually your set gain or start boost should be around 2-3psi below your target boost, but as said wind it up until it spikes then back it off, same for gain. thats assuming you want it to come on boost as early and hard as possible

[GTScotT]

thanks mate, that was very helpful. so if my turbo can quite easily hit my desired boost level even @ high rpm it's better to have the gain up for better response and perhaps drope the set level a little for best results?

Sorry but im not sure about changing between modes on the E01..

yet as for your question there, having the gain up too high will get you inconsistant results. try to make things accurate rather than abit more of this etc.. so get your set to where it needs to be to hit your boost and then only dial in enough gain till it wants to spike and back it off a touch from there.

what you want is a smooth delivery yet obviously as quick as possible. as an example if you have your gain up too high and you hit the boost controls set limiter it will try to cut the boost back down meaning a sudden loss in power which will result in less torque thereafter and less power up top in that gear.

try get it as accurate as you can to the max gain on that set level without ANY spike at all lower is always better GL

[JonnoHR31]

just remember that adding gain usually raises the overall boost too, so you may need to wind the set back a touch