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The mkiv Supra Owners Club

HKS EVC5 Boost concern


SKI

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I've just bought the EVC5, (had an AVCR but after reading so many bad threads about it, I so sold it before even fitting).

 

Anyone had any, or know of any problems with the EVC unit, a few people thought that they dropped boost occasionally. It seems to popular in America, would be really interested to hear what anyone has to say/advice/warning/praise even!

 

SKI

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OK so noone out there that's fitted one of these things, some people love them others say that the thing screws up cos' it can't cope woth the TT sequential turbo operation.

 

Anyone have an opinion on this before I decide to fit or sell mine.

 

Must be someone out there who has one...

 

:conf:

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Thanks for the advice Nic,

 

There must be someone on the forum who has ran the EVC5 in sequential mode on a Supra...

 

Just out of curiosity where did you mount the display and the gain controls!?

 

Thanks

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Have had mine fitted for approx 18 months.

Never really used until last weekend when we managed to get

the car running ok after many problems.

We ran car up from second turbo coming in at approx 15 psi and then gradually dialling in the gain until we stopped at approx 21 psi - it was working fine and still is and obviously my turbos are sequential hybrids.

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Originally posted by fisherjohn

Have had mine fitted for approx 18 months.

Never really used until last weekend when we managed to get

the car running ok after many problems.

We ran car up from second turbo coming in at approx 15 psi and then gradually dialling in the gain until we stopped at approx 21 psi - it was working fine and still is and obviously my turbos are sequential hybrids.

 

Interesting, were any of the problems you experienced related to the EVC5, or just other issues!?

 

Since you've calibrated it John have you had any incidents were it mysteriously drops boost, there was concern that the fuzzy Logic/Self learning features of the device couldn't really accomodate the sequential setup, which confuses the unit.

 

It's good to hear that you have got the thing running, I'm still in two minds whether to have mine fitted or go for something else that is better documented.

 

Regards

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I have the display mounted where the clock is, i.e. coving the clock, on the LHS of the dash just below the warning lights. The controller I have recessed into the dash under the stereo where the buttons for the front spoiler use to be.

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I've spoken to a couple of the popular traders on the forum who have been very helpful to say the least (so top marks there, especially Gaz at Envy), the gerneral opinion seems to be that if it's plumbed in properly it should be OK.

 

Would still be interested to hear from anyone who has had good/bad experiences with the unit, especially your setup values, that would really help point me in the right direction.

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  • 1 month later...

Was dissuaded by CW, went for bleed valve option and have to say more than happy, now that the setup is perfected the car runs superbly

 

Car has stable boost at about 1.15 bar, my boost control is now my right foot :)

 

SKI

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  • 5 months later...
Originally posted by fisherjohn

Have had mine fitted for approx 18 months.

Never really used until last weekend when we managed to get

the car running ok after many problems.

We ran car up from second turbo coming in at approx 15 psi and then gradually dialling in the gain until we stopped at approx 21 psi - it was working fine and still is and obviously my turbos are sequential hybrids.

 

Aha! This assumes you know how to program it then. I have no instructions and want to fiddle with mine, but I need to know all the right button combinations etc to muck with.

 

any chance you could scan and email the instructions? Or perhaps write a better set as I hear they aren't perfect? :p

 

Any help would be hot, I don't want to have to belt around in thrid gear in "learning mode" - I know what settings I want.

 

thanks!

 

Chris

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The HKS EVC boost controllers use fuzzy logic which when used with sequential turbo setups should be disabled, you use to be able to do this on the EVC 4 with a switch on the back if I remember correctly.

 

With this turned off it is then manual setup and should not be an issue.

 

:thumbs:

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Originally posted by Wez

The HKS EVC boost controllers use fuzzy logic which when used with sequential turbo setups should be disabled, you use to be able to do this on the EVC 4 with a switch on the back if I remember correctly.

 

With this turned off it is then manual setup and should not be an issue.

 

:thumbs:

 

That's cool but I still need the instructions on how to do it and manually program the unit - I have no documentation at all for the V series.

 

SOMEONE must have a manual or something! :p

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FYI y'all, this was HKS's FORMAL word on the subject:

 

"...contact the HKS dealer that originally purchased the unit from. They will be able to supply you with replacement instructions."

 

I said I couldn't (came on the car)...

 

"...due to the nature of the product and the ramifications of getting it wrong I would contact a HKS dealer and have them set the system up for you."

 

Jeez, I just want the MANUAL! If I wanted it retuned I'd ask, but since I'm a computer engineer and capable of far more complicated things than a 4 button programming control I am almost POSITIVE I can figure out safe running parameters. All I need is the manual to say how to set it, and I'll go from there :D

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  • 2 weeks later...

I have all the instructions for the HKS EVC5, I have fitted this to 3 TT's now jpec and all have been setup by myself. I can offer an installation service for this product if you like on a saturday in Bristol.

 

I have mine setup for 1.0 Low and 1.2 High works great with Sequential, tested fine for transisions too...

 

I am a private person and am not a dealer of any kind.

 

Cheers.

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Guest Usmann A

The switch at the back of the Unit, is a "Poppet vs Wastegate"

 

Poppet =internal gates(stock supra)

Wastegate=external units.

 

I am not 100% on this, will check now. :)

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