boost setup

[korey1212]

hey everyone I'm hoping you can help me I'm still new to the skyline well turbocharged vehicle in general I have a 1990 Skyline GTR 2.6 what an aftermarket HKs EV 4 electronic boost control no matter what I set the maximum pressure at 1.05 bar it only Beeps when it hits at level and continues to climb is this normal ? Thankyou for the help

[bourquetc]

dnt think thats normal be carefull going over 1 bar on stock turbos if there ceramic shaft u will blow then up!!

[korey1212]

okay so what would be good cut in the cut out settings

[Voodoo_ChildR32]

I run 13psi max on mine and its my daily.


Sent from my iPhone using Tapatalk

[Skym]

Check filters to boost control solenoid (change if necessary), especially MAP sensor filter. The MAP sensor + contoller settings should stop boost spiking.

The boost level when turbo fails depends on how man km they have done (how out of balance turbo is, as could fail at 12psi or 14psi, etc), how they were serviced, oiltemps (high oiltemps = coking / blocking oilways to bearings).

[bobbo]

Check filters to boost control solenoid (change if necessary), especially MAP sensor filter. The MAP sensor + contoller settings should stop boost spiking.

Intersting. I've been dealing with some boost issues for awhile but assumed it was a vacuum line plumbing issue or an inaccurate boost Solonoid (PFC Boost controller).
It peaks at at a set boost level of 1.05 then spikes at about 1.12 when I shift and quickly drops to about 1.05 and continues down to around .96 at high RPM and say 3rd or 4th gear.
Sorry to hijack a bit.

[MarusGTR]

Intersting. I've been dealing with some boost issues for awhile but assumed it was a vacuum line plumbing issue or an inaccurate boost Solonoid (PFC Boost controller).
It peaks at at a set boost level of 1.05 then spikes at about 1.12 when I shift and quickly drops to about 1.05 and continues down to around .96 at high RPM and say 3rd or 4th gear.
Sorry to hijack a bit.

Running aftermarket BOVs? Could the surge during shifting make a spike while the BOVs expell excess pressure? Where I'm getting at is if they're lazy to open (or if the signal is restricted) wouldn't it spike during surges?

[bobbo]

^^^nope^^^

[Skym]

Intersting. I've been dealing with some boost issues for awhile but assumed it was a vacuum line plumbing issue or an inaccurate boost Solonoid (PFC Boost controller).
It peaks at at a set boost level of 1.05 then spikes at about 1.12 when I shift and quickly drops to about 1.05 and continues down to around .96 at high RPM and say 3rd or 4th gear.
Sorry to hijack a bit.

Could be leaking BOV's. Drop off on boost plot towards higher rpm at lower boost levels is usually BOV leak related. Or internal wastegate actuators are stuffed (check when they open on the bench and see if it matches factory specs, or can try test on car, but I think get different psi when it opens). In some cases (higher boost levels) it's turbo's running out of puff.

Spiking can be due to diaphram making internal wastegate actuator lazzy to open wastegate on back of turbo (turbo's x2 on GTR). It was described as like pushing a balloon (balloon = diaphram) against a bin and balloon will collapse (boost is spiking) before bin moves (wastegate opens which stabilises boost level). In some cases it can be caused by the A/R of exhaust housing is too small with higher boost levels (can happen with hybrid turbo's) or wastegate hole wasn't bored out when converted to hybrid turbo and has a bigger wastegate flap (covers wastegate hole on back of turbo) to match. Some fit external wastegates which can eliminate this boost spike.

Also you are meant to replace those filters for boost control solenoid every 5000km as part of routine maintenance.

[MarusGTR]

^^^yope^^^

^^^nope^^^

[bobbo]

Could be leaking BOV's. Drop off on boost plot towards higher rpm at lower boost levels is usually BOV leak related. Or internal wastegate actuators are stuffed (check when they open on the bench and see if it matches factory specs, or can try test on car, but I think get different psi when it opens). In some cases (higher boost levels) it's turbo's running out of puff.

Spiking can be due to diaphram making internal wastegate actuator lazzy to open wastegate on back of turbo (turbo's x2 on GTR). It was described as like pushing a balloon (balloon = diaphram) against a bin and balloon will collapse (boost is spiking) before bin moves (wastegate opens which stabilises boost level). In some cases it can be caused by the A/R of exhaust housing is too small with higher boost levels (can happen with hybrid turbo's) or wastegate hole wasn't bored out when converted to hybrid turbo and has a bigger wastegate flap (covers wastegate hole on back of turbo) to match. Some fit external wastegates which can eliminate this boost spike.

Also you are meant to replace those filters for boost control solenoid every 5000km as part of routine maintenance.

Recirc valves is a good possibility as they now have 150K on them.
I've checked the waste gate actuators in the car and they open free and smooth but I don't recall the pressure. I'll add all of that to my winter "to do" list... which is already getting pretty long and by long I mean expensive
I'll have to maybe clean out the solonoid with some contact cleaner. I bought it used and the filter was UNused.

[korey1212]

Where can I find map filters and boost selonoid filters ? Does any one have good part numbers for these thanks

[cooke24]

when i had a evc iv i didnt even run the filters... had no issues.

first step try resetting the unit itsself to remove any settings previous owner had in there any other wierd stuff. forget how to but i found instructions on the internet via google.

it involved holding one of the front buttons while flipping the switch on the back of the unit in a sequence.\

then once its reset,dial in the boost levels you want.

edit found link

http://www.gtplanet.ru/004/hks/HKS_EVC_IV_manual.pdf

[Skym]

Ask sponsors (Feast Auto Export or RightDrive) for filters -

http://forums.gtrcanada.com/sponsor-forums/

Filter part numbers are here (top 2 part numbers, smaller diameter filter is map sensor, bigger diameter filter is solenoid filters and need 2x of them) -

http://www.hks-power.co.jp/product_search/product/93

Recirc valves is a good possibility as they now have 150K on them.

Stock BOV can get oil deposits between valve, valve seat. I had to replace my cars stock BOV with a stock BOV from another car, modified it to not leak because my stock one leaked badly, even after cleaning it. Later on I fitted Synapse BOV which solved the problems with modified stock BOV.

I'll have to maybe clean out the solonoid with some contact cleaner. I bought it used and the filter was UNused.

Or probably buy a MAC brand 3 port boost control solenoid -

http://www.extremepsi.com/store/product.php?productid=24381

[bobbo]

^^Thanks again Skym!^^
I hope you're as knowledgable as you seem