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Greddy profec with Link G4+

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Just a quick one.

Friend of mine has a jzx110 with a 1JZ.

Hes bought a G4+ however the guy tuning it has told him to get the likes of a greedy profec for the boost control instead of the link Controller.

To me this kind of seems like a red flag, or is it possible to wire these so the ecu can see what’s going on and adjust ?.

Whats everyone’s thoughts ?

My current setup is G4+ and HKS EVC V.

To be honest, I'll remove EVC and change back to aftermarket 3-port BCS next time so that I don't have to use so many interface to complete boost setting.

The advantage of those standalone boost controllers is easy and quick setup. But it cannot make more precision setting and is impossible to connect with ecu(at least I don't know how to do it).

You have a lot more options if you use the ECU to control boost. With ECU control you can control boost by speed, gear, wheel slip, dash knob, fuel composition or basically any other ecu measured parameter you can think of. Also safety stuff to consider such as trim boost if air or water temp gets too hot etc.

This is a personal preference thing really. I know plenty of tuners who like to add a standalone boost controller, however I prefer to do everything through the ECU and as Adam mentioned, you've got a lot more control this way. Being super fussy like I am though, I will say that there is still an issue around the Link closed loop boost control strategy and I get better results using open loop control with the G4+ (watch my webinar on boost control for a better understanding).

where's the link to the boost control webinar? i was wanting to use my hks profec boost controller as well with a link g4x r32 gtr plugin ecu

so i can have a high and low setting without having 2 boost maps

Webinar 70

Webinar 131

Both of these I'm sure are covering the same thing, it's been a while since I've watched them. With boost control through the ECU, you can have an almost infinite amount of boost control levels.

e.g. customer 1, races on the track, here in Scotland the racetracks all have their own micro-climate and can change weather lap to lap, let alone morning session to afternoon. I would set up a high boost (dry conditions) and a low boost (full wet) and have a turn dial to allow them to choose various levels of boost depending on conditions.

Customer 2, street driven/ road raced car I would again set up a high and low boost setting, these would be on a switch to allow the customer to have the choice of their boost levels, either high or low as there's no need for anything in between.

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