Hey I just got an evo and I love it! I mean its a beast of a car almost the best handling car I have driven and almost the quickest car I have been in. But I just want it to last forever sooo... I want to mod it according to making it more reliable. Any suggestions would be greatly appreciated.

I was thinking:
fuel pump(which kind?) - read that the stock one isnt good.
Gauges (what are the top 3 guages you'd use?) - to monitor everything
Better DV/BOV - stock one is cheap and doesnt hold boost that well.

What else could I do to make it more reliable? Is there anything I can do to make it get better gas mileage without effecting performance?

 

Fuel pump should be good unless you run a bigger turbo.

Guages:
1) Boost !!!!
2) Oil Temp
3) Oil Pressure
4) EGT
5) Air/Fuel

Forge makes a good recirc BOV, or you can get the JDM MR BOV.

 

Okay, everything you're asking about has been covered ad nauseum in these forums and spending a few minutes with the search engine would do wonders but I'll give it a whirl...

Fuel pump: The stock fuel pump is fine and it's covered by warranty. There is an aftermarket Walbro 255lph unit available but it won't be covered by the factory warranty and if it fails and takes out the motor, that won't be covered either. If you do decide to upgrade your fuel pump you need to have the motor retuned to deal with the higher fuel pressure or you'll need to install a fuel pressure regulator to get fuel pressure inline with what the ECU is tuned to handle.

Gauges: my favs are boost, oil temp, oil pressure and a wideband O2 AFR

BPV: The Forge BPV valve is a great unit. The new Forge RS is tunable/adjustable and there is a groupbuy going on. https://www.evolutionm.net/forums/sh...d.php?t=149551

Fuel economy: Get your car tuned by a reputable flash tuner. You'll make more power and you'll get better fuel economy.

 

Thanks for the replies. I heard the APS bov was suppose to be pretty good also and was planning on going with that one. What do you guys think? Sorry for not searching i forgot. I did however search about the aps bov and little to no good information about it.

Oh yeah shouldnt I get it flashed when I put more mods on it?

 

turbo back exhaust will increase fuel economy~10%. an electronic boost controller will give you the ability to change your boost levels in your car. so you could really turn the boost down when cruising and really increase your fuel economy. you bov is probably fine especially new and especially when running stock boost. the aps is very good i would have got that but the jdm dv was cheaper. i don't care for a loud bov and the jdm sounds close to stock. the aps will be loud at wot. beware as most bov cause reliability issues, but i have heard of none with the aps or jdm dv. a flash or safc could net you some good power and increased fuel consumption. again, a safc will allow you to change your afrs in your car. if you turned boost way down, you could really lean the mixture out and get good gas mileage. boost gauge is the most important, but i even heard from Buschar that they are off some. get a datalogger and wideband and you will have plenty of info, infact way too much. gauges are totally inaccurate for the most part. an egt gauge and boost gauge are worth it if you don't want a datalogger or wideband sensor. fuel pump is not really needed, but it is safer then the stocker and cheap and easy install. definately do not need a fuel pressure regualtor. maybe at like 500+ whp. need a fuel pump if you plan on upgrading injectors. get your flash after mods. fmic or ic piping will improve drivability and get you some gains.

 

thanks this is the info i wanted. I wasnt sure if i wanted a turbo back because of warranty issues so i'll probably only get a catback which will still free up some flow. couldnt i just get a manual boost controller because they are much cheaper and easier to use i believe. I have a friend selling an safc for cheap maybe i should ask him. I am on a budget also and could probably only get some parts every month and not all at once. I will aslo proabbly get the aps since some are selling their used ones.

 

Get a catback and leave everything else stock, if you want to keep it reliable ... that way you have no warranty issues ...

 

Your car wil be neither safer or more reliable with mods, if anything you'll be making your car less reliable, unless you start modding, your factory gauges are fine as is your bov, fuel pump etc...

 

Get an oil catch can too. It will prolong the life of your turbo. This is a must especially if you go VTA.

 

yeah a mbc is easier to use because there is one setting. but with an ebc you take someone's base settings and adjust it to you application in seconds. the mbc is probably ideal for the budget minded and racing applications though. an ebc will give you the ability to decrease boost on the fly. lets say your driving home from work on the highway and you lowered boost to 13 lbs for better gas mileage. then a sti pulls up and is tailgating you and speeding past you then slowin down. with an ebc you can turn it up to 20 and and give him a run. with an mbc you are trying not to look over at him b/c you have no boost and you will get embarassed reading threads like i smoked some evo last night in my subie. and as the weather changes (like 5-10 degrees) you will be adjusting both controllers. do you want to warm up your car, drive a few blocks, get out, pop hood, and adjust it? or warm up and adjust while driving and at stoplights. either way gets you the same performance. in the long run, if you adjusted boost often to improve gas mileage the ebc would pay for itself. along with the time saved adjusting it IMHO.

 

I dont have any factory gauges .

oil catch can where can i get one and which one is good?

what if i get a in car mbc? I'm also wondering once you change the boost wouldnt you need to different tunes or maps or whatever? how would i change between the two? would a safc work?

oh yeah i'll still take an sti with only 13 ibs jk jk. much love to my arch rival

 

Lowering boost does not get you better gas mileage, not smashing the gas pedal from light to light will get better gas mileage.

 

I don't think this is accurate. People who track their EVO might run into high temperatures and without some aftermarket gauges they may run into problems. Sure it may not boost reliability, but it definatly will help you avoid running into serious problems.

 

so an after i/c piping would hurt reliability? I didnt know increase the flow of cold air to your engine did damage w/o changing afrs dramatically or maf readings. i didnt know improving exahust gas flow hurt anything. i guess a bigger fuel pump(read all the posts about the stocker failing) hurts you car too, etc. etc. etc. now, tons power mods together could hurt your drivetrain potentially. but improving the flow of gases in and out of the car is a good thing for it. as long as you do not get into a situation where your afrs are too lean, but if you have a fuel mangement device and a wideband you wont have to worry about that either. our cars are made overly safe and overly rich.

 

The stock ECU will adjust fuel and timing accordingly if you lower your boost, you do not need an SAFC for that, and you will gain some gas mileage if you turn down the boost (the air entering the engine) as the Air:Fuel ratio will stay the same but both numbers will be lowered to keep it equal. What a tune does is generally make more parts of air per part of fuel, which means if you don't change the stock boost at all and it still tapers and everything a tune will achieve a better gas mileage. It works in reverse too, if you increase boost, you increase fuel usage, hence the need for a fuel pump if you increase boost to a certain point. Get a boost gauge, a tune, and maybe MAYBE oil pressure, oil temp, and EGT (definitly the last three if you're racing and have the stock exhaust) but don't worry about the stock bov but if you really really want to get rid of it for some reason still (asside from wanting that loud bov sound) get the JDM MR one as it is basically the same part but metal instead of plastic so supposedly it holds better but my stocker is holding 21 just fine and has held 23 just fine when I've been on race gas.