Jeff RX7

Hi guys, I just bought a HKS EVC 5 boost controller and I need your knowledge about how to install it on a FD with sequential twin turbos.

How must I connect it, I saw the installation diagram on JKS website but I don't understand how to use it with the FD.

Is it a dual or a single wastegate ?

Have someone already install this kind of product on a stock FD ?

Force13B

iTrader: (19)

You have a wastegate contoller and a turbo precontoller and both need to go into the boost contorller. The lines that come off the left side of both need to go into your boost controller the lines that come off the right need to be capped.

this might help you out
turbo_system_simplified.jpg?t=1241108507

Jeff RX7

Yeah, thanks, is possible to indicates the EVC on the diagram, I have O I B inlets in the EVC stepping motor.

RX7LINK

iTrader: (3)

Maybe this will help? after you hook everything up. u can either rework your vaccume hoses (capping off the 2nd nipple on both actuators that are routed to the stock solenoids) or simply unplug the electronic plugs on both of your stock solenoids and it'll keep those shut.

Jeff RX7

yeah, great thanks mate that was exactly what I am looking after !!!

Jeff RX7

I juste done it... but I've more than I want.

I choose 0,80 bar for mode A and I obtain 1,47 bar with WOT !!! Is it 0,8 more than the stock mode or really 0,8 ???

Must I let restrictor pill in the hose, if yes = in the IN or OUT one ?

poop2003

did you unplug the solenoids? you must unplug or cap off the lines or you will over boost. Also, did you do the initial settings properly? what did you set as your base boost?

someone else please confirm, but i am pretty sure that you shouldnt use a restrictor pill and let the EVC have full control.

RX7LINK

iTrader: (3)

read my post :P. unplug your stock solenoids and try again

Jeff RX7

Solenoids were unplug.

I think I use a smallest vacuum filter ont the IN hose.

It's like the wategate does'nt operate. How can I be sure the EVC stepping motor is OK because I bought it on ebay as an used one ?

Thanks guys ;-)

poop2003

the IN hose should be using 6mm line and the smallest filter is for the 4mm vacuum...maybe it's leaking?
to check the solenoid, turn key to ignition only (dont start engine) and switch your EVC on and off. the solenoid should make a buzzing sound.

trouble shoot guide in EVC manual for uncontrollable boost:

incorrect initial set up - do a reset all and start again

incorrect bypass valve selected - with EVC on, check that you have the correct on chosen

hose is cracked or come off - check all hoses for leaks and correct plumbing

vacuum filter is blocked - check and replace if needed

spiritrmazda

iTrader: (3)

I'll have to install my boost controller soon, this will help.

Jeff RX7

Problem solved = thank you

I've installed a 4mm vacuum filter (the only I have) at the 6mm place. I found a 6mm one and replaced the 4mm = all is OKAY !

It is working fine now, a little boost creep when the secondary turbo is pushing, but nothing grave.

Great thanks guys....

poop2003

it's good to know you've got it all fixed!
the replacement HKS filters are quite expensive, has anyone found a good alternative to the 6mm and 4mm ones?

MILOS7

iTrader: (3)

So i need to unplug the electronic plugs ( wastegate and precontrol plug: see in picture below?) no need to cap anything in this case?
and smallest(4mm) hose/Boost to intake manifold ( the one use for aftermarket boost gauge ?
Thanks to confirm

RX7LINK

iTrader: (3)

yeah, just unplug those 2 plugs and will keep those vaccum closed. no need to cap

its not the cleanest way to do it. but it works

MILOS7

iTrader: (3)

I don't understand japanese but it seems that unplug these electrical plugs is the way to go if we consider the installations instruction from HKS.

Thanks a lot.

I have plan to buy this boost controller because i have enough to see fluctuate my boost with cold and hot weather ( only controlled with apexi power FC)

RX7LINK

iTrader: (3)

if you're getting boost creep from cold weather, the only way to solve it is porting the wastegate or add some sort of restrictor plate to your exaust pipe. eventhough there's tweaks you can do to the EVC to lower your boost slightly. you will still get boost creep.

MILOS7

iTrader: (3)

actually , no boost creep only lower boost that it must be ( in hot weather)

just order hks evc ez2 , but what is the hks evc installation kit? ( 4503-009US for fd3S)

need i this kit for proper install?

RX7LINK

iTrader: (3)

i don't know. maybe it comes with a harness for plug and play? no idea

i just got the regular boost controler where i spliced few wires onto the ECU harness

poop2003

i'm pretty sure the installation kit is for the twin turbo set ups. it comes with some extra hoses and T's as the standard kit only has enough parts for single turbo set up

poop2003

you have to unplug it or else the boost will sky rocket out of control!!!

MILOS7

iTrader: (3)

GOOD TO KNOW!


just received my ecv ez2, but which setting should I put in my power fc commander?

I've already selected option 2 in boost setting : primary: 0.90 secondary : 0.80

But since my target boost is 0.9 bar with my new evc ,
I would to know what i need to do whith my power fc, leave this way ( option 2) or anything else?


Thanks

poop2003

your setting of 0.9 and 0.8 in the PFC is the boost fuel cut limiter setting. if the PFC detects boost higher than this setting, it will fuel cut. there is some buffer to this number, but i am unsure what it is.
if you want to run 0.9bar, i would suggest setting both primary and secondary on PFC to 0.9

RX7LINK

iTrader: (3)

once you installed a aftermarket boost controller with its own solenoids. it will bypass the factory ones. and pfc will no longer control boost

MILOS7

iTrader: (3)

Thanks for the clarify!