Max safe boost? [Merged 10-6]

[Turbolaser]

Is it safe to do the boost contol solenoid mod on a stock 1G?

 

[zachyd23]

And replying to AlaskanDsm, what exactly is a wideband? Is it a controller that plugs in to your ecu to tune it or something? Also is it really expensive?

The max safe psi and/or power(they are separate) will probably be limited by the individual parts and the tuning more than the stock internals.

You will have to log for knock and check afr along the way, and the most power or boost will probably be limited by something else in your setup. Turbo efficiency and/or flow, intercooler efficiency, fuel supply, fuel octane etc.

Do some logs, pull some plugs, and go from there.

What exactly do you mean log for knock and check AFR? I don't really have any idea about tuning and how it works. I just got my 92 TSI AWD a month ago

 

[AlaskanDsm]

Apologies.

A wideband is an Air/Fuel ratio (AFR) sensor also referred to as your O2 sensor. It monitors the exhaust gases passing through the oxygen sensor housing (O2 housing) to tell you if the mixture is too rich or lean in the amount of fuel being burned by the engine. Our car's are equipped from the factory with a narrowband sensor. The difference in tuning with a wideband as opposed to the stock narrowband is like skateboarding during the day opposed to skateboarding at night with a flashlight, not being able to see everything else around you.

A wideband sensor and gauge can usually be purchased for about $180-$220. This is one of the essentials to tuning your car properly. A good place for you to maybe start reading is:

engineandecu101 [ECMTuning - wiki]
fueltrimupdatepoints [ECMTuning - wiki]
http://members.shaw.ca/costall/1000Q/
-----------------------------------------------------------------------------------------
http://www.dsmtuners.com/forums/articles-tuning-ecu/208824-explaining-knock-how-get-rid.html
http://www.dsmtuners.com/forums/articles-tuning-ecu/105569-how-safc-works.html
^^^^(as a general idea and in a "general" sense of info) ^^^^
-----------------------------------------------------------------------------------------
Tech Guide: 1G 4G63t Upgrades - DSMtuners
(in case you have not read over this yet.)

 

[NeWyoRksPLaYaZ]

Hey guys, I ordered a maual boost controller and I'm wondering how much boost can I run that is at a safe level. Right now I'm at 6 psi. My mods are jrp lifters, aftermarket exhaust manifold with external wastegae, tial wastegte with 6lb spring, 3.5' exhaust all the way back into a apexi n1 exhaust, 60 trim turbo, big front mount intercooler, short ram intake with aem dry flow filter and an ebay blow off valve..my question is, how much do people run usually on stock internals and say the evo 16g turbo. Because I want to turn my boot upto about 10-15 psi because its my daily driver and I don't want to blow anything up . Does anyone know of any good shops out in the long island\queens area that I could go to and get a good input? Thanks in advance!

 

[Bud92gsx]

You should be able to get away with at least 10psi..With no fuel mods..Not sure why you went with a 60 trim, and no fuel mods..

 

[fiveSFE]

This has been answered a trillion times

Its not a question of how much the internals can handle, these 4g63's can take a beating (30psi) while being stock internals.

You didn't mention what kind of fuel or tuning mods you have done to the car. If your on stock injectors and stock fuel pump you should leave the boost at 6psi. If you turn up the boost on the stock fuel system it will lean out, Thus cause pre-detonation and break stuff.

 

[NeWyoRksPLaYaZ]

I bought the car like this, the guy before me listed out these mods. I do think it has a aftermarket fuel pump because its loud and it sounds like a whine. But I'm not 100% sure so that's why I wanted to get some input before I do anything and break my car .

 

[Bud92gsx]

But no safc or ecmlink and bigger injectors..As well as aftermarket fpr?

 

[NeWyoRksPLaYaZ]

No tuning software that I know of. So before I turn up boost, I have to get bigger injectors, fuel pump, a tuning software and fpr? After those things I can turn it up?

 

[Bud92gsx]

Theoretically yes..Once you start upping boost the fuel mixture gets leaner causing not good things to happen..

Once you can add more fuel and adjust, then you can run as much boost as you have fuel for..

 

[LiquidX]

Leave it where it's at until you get supporting fuel mods, an ability to tune and most importantly a logger. Each setup wilrun differently so it's imperative you watch a logger yo judge your IDC%, fuel trims, knock/detonation, etc.

What brand turbo is it?


ECMLink v3 is the preferred tuning solutions but you also can swap in a flashable 98/99 ECU. Do your research before you buy anything to make sure you are getting exactly what you need.

 

[Bud92gsx]

ECMTuning, Inc.

 

[stuckwithgsx]

It sounds like the previous owner probably had some sort of controller on there before it was sold to you.

Stock boost level is higher than 6 psi, so something is off.

If the previous owner did have a controller on there then that could mean 100 different things, but most importantly imo it means you should tread carefully and make sure this guy wasn't already pushing 20-30 psi (or trying). People with these cars have a reputation to get a mbc and up the boost to go fast and then start throwing on bigger turbo's before fuel mods and doing lots of things that aren't very good for the internals of the engine.

If it was me I would go over all the mods and as much inside the engine as you can, and just see if it was abused to the max already.

If all turns out good then once you start logging and get your fuel setup where it should be, then i'm guessing you'll be very, very happy with your boost levels

 

[LiquidX]

It sounds like the previous owner probably had some sort of controller on there before it was sold to you.

Stock boost level is higher than 6 psi, so something is off.

If the previous owner did have a controller on there then that could mean 100 different things, but most importantly imo it means you should tread carefully and make sure this guy wasn't already pushing 20-30 psi (or trying). People with these cars have a reputation to get a mbc and up the boost to go fast and then start throwing on bigger turbo's before fuel mods and doing lots of things that aren't very good for the internals of the engine.

If it was me I would go over all the mods and as much inside the engine as you can, and just see if it was abused to the max already.

If all turns out good then once you start logging and get your fuel setup where it should be, then i'm guessing you'll be very, very happy with your boost levels

Did you miss the part where he said he has a 60 trim...

 

[NeWyoRksPLaYaZ]

Alrighty, I'm saving up for bigger injectors now how muh do they usually run and how hard is the process of installing? The previous owner just put this turbo on and then he sold it. The turbo is brannd new. I can literally eat off it . But the brand idk..it says a/r 60 on the side but I can't see a fammiliar name.

Is 60 trim bad?

 

[Bud92gsx]

A60 trim isn't bad..But most people think If I put a huge turbo on this car I will ultimatly go faster.'

Well withought adding fuel and tuning the car will actually feel slower...And bigger turbo means added turbo lag..

 

[NeWyoRksPLaYaZ]

how many cc should i get? i found 1000cc for 250 ish. good?

 

[Bud92gsx]

If your planning on running e85 you may need more injector..For pump gas..1000's should be fine...

 

[91stocker]

how many cc should i get? i found 1000cc for 250 ish. good?

Those will work great if you have something to tune with, if not then it wont run at all.

 

[NeWyoRksPLaYaZ]

found 750cc RC injectors, how are those

i only use 93 from shell or mobile, nothing else..im thinking about picking up 750cc ones and then buying a tuning software. dsm link?

can i use a aem wideband for tuning?

 

[91stocker]

found 750cc RC injectors, how are those

i only use 93 from shell or mobile, nothing else..im thinking about picking up 750cc ones and then buying a tuning software. dsm link?

can i use a aem wideband for tuning?

You will need a wideband and something to tune with, like link, etc.

For the injector size you need, read this.
http://www.dsmtuners.com/forums/newbie-forum/393264-x-hp-fuel-injectors.html

 

[NeWyoRksPLaYaZ]

ok thanks, ill buy 750cc for now and keep under 350hp. so after i buy injectors, ill pick up a wideband and dsm link. after that ill buy walboro 255 fuel pump. that is correct?

 

[91stocker]

ok thanks, ill buy 750cc for now and keep under 350hp. so after i buy injectors, ill pick up a wideband and dsm link. after that ill buy walboro 255 fuel pump. that is correct?

I'd get link and a wideband first. You can tune and max your current injectors, then upgrade the rest of the fuel system. Thats what i would do anyway. I also wouldnt drive that car until you get some sort of tuning on it either.

 

[robs gst]

ok thanks, ill buy 750cc for now and keep under 350hp. so after i buy injectors, ill pick up a wideband and dsm link. after that ill buy walboro 255 fuel pump. that is correct?

I would pick up link than a wideband than afpr than the pump and injectors.That pump will over run your stock fpr that's why i say to do it first.

 

[NeWyoRksPLaYaZ]

ohh okay that sounds good, thank you guys! now the search begins for wideband/dsm link

 

[Rankin_59]

Hey everyone,

I just purchased a 1997 Mitsubishi Eclipse GS-T this Tuesday. It's currently running 15lbs of boost @ 93 octane; however, I'm installing a Voodo M.B.C this weekend and would like to know if any of you could help me determine the max safe boost level @ 93 octane? The modifications in the car are as follows:

-Forced Performance Big T28 Turbo (Ported by F.P)
-Ported Exhaust Manifold
-GReddy F.M.I.C
-Apexi N1 Downpipe and GReddy Evo Catback
-EPROM E.C.U and DSMLink ver. 2.5
-650cc Injectors
-Walbro 190lph pump (re-wired)
-Brian Crower 272 Cams
-GReddy Type-S B.O.V
-Injen style Air Intake with K&N Filter
-Royal Purple Synthetic Fluids

Tell me what you guys think. If you'd like to see pictures of the car as well I can post some later this afternoon.

Thanks,
Cody