Extreme PSI EVOIII 16G got some ?s

[92BoostedDSM]

Ok so ive decided against the Big T28 and im going to get the EvoIII 16g from extreme PSI. My question is should i get the flapper mod or not? What will I gain from this? Also im getting the 2G install kit but wont i still need a exhaust manifold? I've got a 1g TSI i can take it off of if I need to. Also is 16psi or so about right untill i get my fuel upgrades? And last how will the SSAC FMIC kit fit to this turbo or will it need some modding?

 

[dsmclipse97]

you should probably get fuel mods before anything else, stock injectors and fuel can only handle 16psi on a T25. without any fuel upgrades or tuning method the 16G might even make your car slower. But if you really want to get the 16G then i assume the "flapper" upgrade your talking about refers to the wastegate flapper upgrade. This fights off the infamous boost creep which you wont need to worry about until you start pushing more boost through the 16g. But again i would suggest support mods before the turbo upgrade.

edit: the 16g is direct bolt on. you wont need nor want the 1g exhaust manifold. they are on the brittle side.

 

[turbodsm18]

Personally, I wouldnt run more than 12psi on the stock fuel system. To run the ss FMIC you will need to buy a different j pipe from like Dejon to point in the same direction as a downfiring compressor housing. Also the 34mm Flapper mod is need along with porting if you are running a 3in TBE because this will help control the boost at lower levels. Also you probably want to look into getting a dumped o2 housing becaus that will help you run lower boost a little easier.

-Kevin-

 

[92BoostedDSM]

sweet thanks for the answers guys. what size injectors should i get like 550s or 650s? and which pump the 190 or the 255? ill buy the fuel upgread kit from them aswell just maybe bee a week or 2 later and ill wait to put the turbo on till i get all that done. I there a guide on here on how to use the afc?

 

[JayRolla]

550's would be way easier to tune on a SAFC2 than 650's but 650's would be the max. Without timing control you cant control the timing pull if you run to large of injectors. Also I would also search more about the flapper mod before getting it done. Ive heard of some problem at high boost or something not sure. Just research before you buy. I run 3" exhaust and have no creeping issues at all. the turbo just needs to be ported correctly around the flapper so it opens enough. Also the 2g mani has a better flow design than the 1g mani so dont use that.

 

[92BoostedDSM]

ok i will have 2.5 turbo back im waiting on my bushar downpipe to comein should be here this week. also i knew the 2g manifold were better but for some reason i though you had to run the 1g style for it to bolt up. Dont you have to to make the 14b work?

 

[JayRolla]

No all mitsubishi turbos will bolt up to any 1g/2g/evo/SBR cast manifold. they are all built off the same design.

 

[95blackGsTurbo]

I recommend getting the Big T28. I run 22 psi daily on it with 550cc injectors with zero knock. It will be cheaper in the long run since you won't need the 2g install kit. You can easily run 16psi on stock T25 turbo. I have run up to 15 psi on a 14b and it ran great. No knock until 6500. I would recommend the 34mm flapper mod on whichever turbo you get and a 2.5" downpipe with 3" catback. It will help with boost creep and spike. 550's will be easier to control with an SAFC2. Make sure if you get a 255 that you also get a AFPR as well.

 

[92BoostedDSM]

well i can get the 16g wth the 2g install kit for the same price i can get the Big T28 so why would i not go ahead and get the 16g. Im looking for low 8's to high 7's in the 1/8th and between 300-and 350hp. I oculd get the T28 right now but i think id be better with the Evo3 in the long run and future. Im running about 15ish psi right now on my T25. Will the 190 do or should i get the 255?

 

[95blackGsTurbo]

190 will be fine for an EVO III 16g.

 

[compression]

My evo 3 16g crept to 20 psi no matter what i did , and i have the 31mm wastegate flapper with no real porting around the wastegate area, but some mild porting in the turbine housing. i would say go with the evo 3 16g, it has been proven to make over 400whp and 430 wtq

 

[JayRolla]

My evo 3 16g crept to 20 psi no matter what i did , and i have the 31mm wastegate flapper with no real porting around the wastegate area, but some mild porting in the turbine housing. i would say go with the evo 3 16g, it has been proven to make over 400whp and 430 wtq

If you do not have the turbo ported you may get some boost creep. But since your running 2.5" exhaust you may not. I would have it ported no madder what. Also the evo16g realistically is a 300whp turbo. Anywhere after that is a battle to get more power. Slowboy made crazy power but they had the turbo over 30psi and would drop to 26psi by redline. Also had racegas and fully built 2.0L. I would go with the evo over the big t28 even if you had to buy the install kit. If you are looking for 350+whp on pump I would go with a 20g or 50 trim or bigger.

 

[92BoostedDSM]

Well hp isnt as important as the track times i run. Like I said im looking for low 8's to high 7's in the 1/8th. What about race gas, can i run it without anyhting being done to the car or what? Sone one told me it owuld be bad on the injectors for some reason.

 

[Glliw]

If you want T28, go with Gpopshop.com. Its the cheapest I've seen thusfar. I haven't seen any complaints about them yet either.

 

[spyderturbo007]

I'm going to play devil's advocate with 95blackGsTurbo here.......

I would stay away from the upgraded flapper if I was you. The larger flapper is great for lower boost settings, as Adam said, but it sucks for higher boost settings. The larger the flapper, the more exhaust gas can bypass the turbine and keep the boost from creeping at low boost settings. On the other hand, when you start increasing boost, the pressure on the flapper exeeds that of a smaller flapper and it can blow open from the increased force.

 

[JayRolla]

I knew there was a reason not to get the flapper for running higher boost. I could not remember.

 

[syclone]

FYI on the 16g with a front mount, I done this and reclocked the turbo, not a lot of work involved, and now my turbo points right in the direction of the front mount, a great mod in my opinion, cuts out a huge 90 degree bend in the pipe, plus my piping is shorter, the only real issue was to fabricate a new bracket to mount the wastgate to. but was'nt to hard to perform.

jamie Sanders
1996 GSX

 

[JayRolla]

My mechanic used to do this but said he stopped do to it being to weak and having problems with something breaking. I wanted him to do it to mine but he said he dont do it anymore. I makes routing intercooler pipes way easier.

 

[DSMunknown]

I'm going to play devil's advocate with 95blackGsTurbo here.......

I would stay away from the upgraded flapper if I was you. The larger flapper is great for lower boost settings, as Adam said, but it sucks for higher boost settings. The larger the flapper, the more exhaust gas can bypass the turbine and keep the boost from creeping at low boost settings. On the other hand, when you start increasing boost, the pressure on the flapper exeeds that of a smaller flapper and it can blow open from the increased force.

Curse you, Nathan! You beat me to it!



http://dsmtuners.com/forums/showthread.php?t=233936post#19
http://dsmtuners.com/forums/showthread.php?t=207016
http://dsmtuners.com/forums/showthread.php?t=213748
http://dsmtuners.com/forums/showthread.php?t=229619
http://dsmtuners.com/forums/showthread.php?t=180359
http://dsmtuners.com/forums/showthread.php?t=89899
http://dsmtuners.com/forums/showthread.php?t=108843
http://dsmtuners.com/forums/showthread.php?t=153141
http://dsmtuners.com/forums/showthread.php?t=131777



As Josh has stated numerous times, opting for the larger WG flapper will actually hinder the flow of exhaust gases trying to escape, even if you port that section of the turbocharger. So, putting a larger object (that is, the 34.8mm flapper) in the way of a hole will not flow as well as having a smaller object (that is, the smaller flapper) in its place.

Why, might you ask, do vendors sell the turbocharger with this supposed "upgraded" option? Because it means it will cost the consumer more money for the product, and higher sales is what any vendor is about. They are there to make money. Now, I'm not saying that such vendors are out for blood, or that they are greedy capitalists. But I am saying that this is how the after-market car enthusiast world works, generally speaking. And don't forget that the vast majority of car enthusiasts are males. It depends on what we're talking about, but we like to think that bigger is always better. So, if the option is there to get a larger WG flapper, who's to say it isn't a good thing? This is the kind of mindset vendors and companies feed off of.



EDIT: Just for everyone's reference, and because I like to throw up pictures:

You must be logged in to view this image or video.

BTW, what is the size of the original MHI EVOIII16G WG flapper?

 

[92BoostedDSM]

ok so i should just get it ported and forget about the flapper mod.

 

[bbray]

So what psi is it good to have the large flapper up to... at what psi is it better to have a smaller flapper on the Evo 3 16g.... my 14b is blown and i am looking at getting a evo 3 16g in the next couple of days... i just need to decide what one to go with and i had questions about the upgrading to the larger flapper.... i will probably run 20psi because i am buying 550cc injectiors and a 190 fuel pump too... i will tune with my safc

thanks,
brandon

 

[DSMunknown]

BTW, what is the size of the original MHI EVOIII16G WG flapper?

For future reference, I contacted Hung over at Extreme PSI and he says that the original WG flapper that comes with this turbo is sized at 31mm (opposed to the "upgrade" that is sized at 34.8mm).

 

[JayRolla]

Dont get the flapper just have it ported correctly.

 

[Travi2506]

I'd say a 190 pump would be fine... I'm running 15-16psi on stock injectors with just a 190 and S-AFC... Tuned with a wideband, my Air/Fuels are more than safe... I bought my EVOIII from Exreme, ported & 34mm wastegate... It actually has Forced Performance's logo stamped on the flange... I really can't complain, and I'm glad I picked that over the T28...

 

[92BoostedDSM]

ok thanks guys for the replies ill let you know how the install goes.