From a PM - Foreign Evo owner has a few problems..

Hi all,

I have been speaking to this guy on and off for a while.. I tried to encourage him to use the forum but I think he is a bit shy

Anyhow, latest PM!

Bazza, Hi.

Its been quite sometime since i last e-mailed you. I wanted to again thank you for helping us. My friends evo is back on the road. It runs great. And all thanks to you, for helping us with the shop manual.

Bazza, however, i do have a question. My friends car is a EVO 6 GSR 1999. He has a drop in Hi flow HKS filter, HKS SSQ BOV, Apexi sports catalyzer, Apexi CATBACK. Otherwise the car is all stock.

His DEFI boost guage shows 1.2/1.3 bar of boost. Last couple of days i have read up various threads. Of what I understand his car seems to be boosting a little to high with his surrent setup. That and the qulaity of octane in Bangladesh is terrible. Do you think its over boosting? If so what are the areas we should look into??

How many turbo solenoids are there in the EVO 6? Idle is fine and vacuum is healthy.

If not, do you think its safe to be running like this, I have a feeling he's running lean(any other way to check that besides wideband?). (We donot have a dyno or wideband o2). Plus the octane is RON 89. What do you suggest we do.

Hoping to hear from you soon.

Best Regards
Tahmid

Can anyone help him out?

[wasabi]

89 Ron octane level?! :shock: ...My god, that is low...I thought Australia's 98 Ron was Bad...I'm even surprised the car can even run on 89 ron. Do you hear the engine pinging when you are on high load? These cars are meant to run on Japan's 100 Ron fuel, if it starts pinging on a constant basis the car might have to be detuned and programmed the ecu to run on the the low level octane...not even sure if that's possible since everything has to be re-mapped.
In terms on the boost pressure questions, I would think that the Evo 6 internals are safe to run on 1.2 Bar boost level. I have found that when doing exhaust systems on the Evo 5-7 ...over time the boost tends to creep up 2-3 Psi higher than normal...

Another area that you could check is whether you have any vacuum leaks. Check and follow the hoses from the actuator and follow it through all the way to the solenoids...what i do is normally rub the vacuum hoses with water and soap so that when there is a leak you can see bubbles...


I'm just a Mitsubishi Enthusiast and not a mechanic but i hope that helps...

[kennyp]

Originally Posted by WASABI

89 Ron octane level?! :shock: ...My god, that is low...

surprised the bloody car will start :shock: :shock:

am assuming that he is pouring in all the octane booster he can find :shock:

question is can the engine run on 89 ron fuel at the boost pressures he is stating without it leaning out to much?????????

without all the info and just the facts he has given you bazza i see the potential for an engine melt down (my opinion) if he dont get it sorted pretty soon

[user1313]

Originally Posted by bazza

Hi all,

I have been speaking to this guy on and off for a while.. I tried to encourage him to use the forum but I think he is a bit shy

Anyhow, latest PM!

Can anyone help him out?

I hate you for doing this. ops: j/k

[user1313]

Originally Posted by WASABI

89 Ron octane level?! :shock: ...My god, that is low...I thought Australia's 98 Ron was Bad...I'm even surprised the car can even run on 89 ron. Do you hear the engine pinging when you are on high load? These cars are meant to run on Japan's 100 Ron fuel, if it starts pinging on a constant basis the car might have to be detuned and programmed the ecu to run on the the low level octane...not even sure if that's possible since everything has to be re-mapped.
In terms on the boost pressure questions, I would think that the Evo 6 internals are safe to run on 1.2 Bar boost level. I have found that when doing exhaust systems on the Evo 5-7 ...over time the boost tends to creep up 2-3 Psi higher than normal...

Another area that you could check is whether you have any vacuum leaks. Check and follow the hoses from the actuator and follow it through all the way to the solenoids...what i do is normally rub the vacuum hoses with water and soap so that when there is a leak you can see bubbles...


I'm just a Mitsubishi Enthusiast and not a mechanic but i hope that helps...

Thanks for sharing your knowledge. I dont know how the evo functions, however, I know that running RON 89/90 octane and 1.2/1.3 bar (that too NOT at WOT) the engine will BLOW.

I have a couple of questions.

1. Is there a solenoid you can unplug (as in wastegate solenoid) to limit the boost??

2. How efficient will a boost controller be.

We are looking to run around 0.9 or 1 bar (MAX) with this octane.

Best Regards
Tahmid

Tell me about the safety ,easures i cam take.

[user515]

Personally I would fit an electronic boost controller, such as a GReddy Profec B, set it to 1 bar, and see how you go.

[Tuppy]

tahmid hope you get it sorted

[wasabi]

I wouldn't unplug any hoses from the wastegate if I were you, that'll mean you'll run unlimited Boost :shock:
As Traction Man suggested, it would be a good Idea to fit an Electronic Boost Controller and preset it to 1 Bar. Just want to ask in terms of your boost gauge, is it a mechanical or electronic boost gauge? I would also try to fit a different boost gauge just to see if there is any difference in reading...could be a faulty gauge like what i experienced..my first gauge would not go pass 0.9 bar and I kept creeping up the boost until I fit another one in and it reads 1.6 Bar!

Also as a percautionary measure, get all the octane boosters you can get, coz at 89 Ron and at that boost level, you're looking for trouble..

Hope that helps...

yea 89 is a no-go in a EVO.... im suprised the car will even start. a electronic boost gauge will be nice to lower boost but to check to see if your air/fuel is correct you will need a wideband o2 and a gauge. that will let you kn0w if you are lean or rich.

also check your plugs 89 and running lean are probably putting a hurt on them change em out and see if the car runs any better. hope that helps.

[user1313]

Originally Posted by Traction Man

Personally I would fit an electronic boost controller, such as a GReddy Profec B, set it to 1 bar, and see how you go.

Traction Man: Thank you.Of what I have heard the Profec Spec S is easier to work on and hook up then the profec B spec 2. So the S can be an option. Also how is the apexi AVC-R?? Is it diffuclt to tune?

Anyone use water injection kits here?? Aquamist or coolingmist?? I know the EVO already has an intercooler which works wonder at stock and above stock boost. However, I just want to reduce the intake temp further, as a result reduce the knocking levels. (think: oxygen)

How good are RAZO octane boosters??

Best Regards
Tahmid