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when to upgrade auto trans and intercooler?

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94exa2

10+ Year Contributor
184
1
Jan 1, 2010
Atlantic Beach, North Carolina
hey guys, fairly new to dsm's, but not the import world. i came from the honda realm, i know i know....

but i am looking at this really nice 99 gst auto with <60k miles and am wondering, at what point does the stock 2gb turbo auto trans need to be upgraded? and at what point would i need to swap to a fmic?

my only plans so far are on the coldside of the engine. nice aluminum intake with k&n filter, hard IC pipes, clean stock smic (for now), better bov (recirculated into the intake), bcs restrictor mod, boost controller/gauge etc... basically all the "free"mods/ stage 0 and some of the stage 1 upgrades Tech Guide: 2G 4G63t Upgrades: Stage 0 Power - DSMtuners.

then MAYBE upgrade to a ported 2g ex mani, 14b, ported o2 housing, 2.5" downpip/2.5" highflow cat/2.5" catback with stock evo8 muffler and maybe a decent fmic.

would i NEED a fmic with the free/stage 0 mods and stage1 mods? or would a bigger smic with proper ducting be more than enough? would i NEED to build/upgrade the auto trans at this point? i'd LOVE a fully built, highstall auto trans, but dont really wana spend the $ if i dont NEED it for my plans.

maybe one day i will have the built 1g 4g63/fully built auto trans big16g dsm i dream on, maybe.... but untill then a nice "bolt on" gst will do
 
The evo 3 manifold will bolt up to any dsm housing..E3, t25, t28, 14b..But the cheapest turbo would be the 14b..Your still going to need a jpipe, unless you go with the t28..But for the money the 14b is the cheapest way to go...If you want the quick spool, 14b,t28..I would also get a 7cm turbine housing, you can find for pretty cheap around here or on ebay..The bigger turbine housing makes sure the turbo will not choke up top..

Heres the link for the shift box.. RoadSurge.com
 
OK, Here you go I'll sum this up for you.

You have an Automatic Trans.
You want an Upgraded Turbo that Spools as quick as a T25, but performs like a 16G.
You want to Keep the SMIC.


Am I correct so far?

If so, for ease of Installation, and less headaches

Just get a T-28, yes it will cost more than an Evo3 16g, it bolts up to the Stock 2g exhaust manifold,and stock O2 housing, and has the Discharge to the Passenger side making connection to the SMIC just like stock.

Since basically everything listed is stock except for the Turbocharger, you can use any DP, Cat-back, Ported whatever with little to no modification.

What this means to you, Buy the FP B28, you'll be happy.

Don't try to over complicate your build, and later if you want to switch to an FMIC it's easy.
for the FP B28, you will need at a minimum 660cc injectors, Fuel pump, and a tune to reach it's full potential.

It Spools As quick as a T-25, out flows a 14b, requires no special modifications to mount to a stock engine, and holds boost to redline.
 
so the fp t28 spools quicker than a 14b and any 16g?

and the fp t28 will outflow the 14b and small 16g uptop?

if it spools as quick as a t25 but flows like a 16g uptop, I may go fp t28

which manifold would you suggest with the fp t28? ported 2g? evo3? fp?

which o2 housing for the fp t28? i plan on 2.5" mandrel from turbo to muffler. ported 2g o2 housing? evo3 o2 housing? fp?

so basically, ideal exhaust manifold and o2 housing for FP t28 if using 2.5" dp?
 
Go with the t28..You can always upgrade to the evo3 or small 16g..The difference in spool time, is about 3k on the s16g, and 32-34k depending on manifold as well..The evo3 manifold out flows the 2g hands down..Since you have an auto I'd just stick with the t28..
 
Go with the t28..You can always upgrade to the evo3 or small 16g..The difference in spool time, is about 3k on the s16g, and 32-34k depending on manifold as well..The evo3 manifold out flows the 2g hands down..Since you have an auto I'd just stick with the t28..

but would u rather run an evo3 manifold with the fpt28, a ported 2g, or the fp manifold? and what about the o2 housing? ported 2g, evo3 or some other?

dejon intake/hard upper and lower ic pipes, greddy bov dejon large smic, fpt28,___ manifold,___o2 housing, 2.5" mandrel dp to muffler, fuel pump, injectors, tune


side question in my noob'd out thread... you guys trust IPT for auto awd transmissions? clutchpacks, converters, shift kits etc??
 
The E3 manifold is the best manifold for the money.You can also port it if you want to.But FP also makes a hell of a cast manifold..If you port the 2g 02 housing it will work just fine..Especially if you want the car to be mostly stock..The E3 02 housing flows better than the 2g, but to keep costs down just port the 2g..It's already going to be off the car why not just port it and be done with it.But our supporting vendors do make 2.5 inch 02 housings to match your planned 2.5 inch downpipe and exhaust..
 
so the fp t28 spools quicker than a 14b and any 16g?

and the fp t28 will outflow the 14b and small 16g uptop?

if it spools as quick as a t25 but flows like a 16g uptop, I may go fp t28

which manifold would you suggest with the fp t28? ported 2g? evo3? fp?

which o2 housing for the fp t28? i plan on 2.5" mandrel from turbo to muffler. ported 2g o2 housing? evo3 o2 housing? fp?

so basically, ideal exhaust manifold and o2 housing for FP t28 if using 2.5" dp?

1. Yes

2. Just go FP B28.

3. I run a Stock 2g manifold (ported)
The FP B28 is ported to use the 7cm gasket.

4. I use the stock O2 housing (ported)

5. I run a 3" Megan DP, so 2.5" really doesn't matter, you can put anything there...it's a stock O2 housing.

If you want to spend the money, then Yes, FP manifold, E3 manifold, and O2 housing.
Or
You can just Hand Port the ones you already have.

Really this question has been answered 3+ times in the same thread.

I have the FP B28, owned it for years, the Above is experience with the turbocharger, set up, and ease of installation on an Automatic GSX.

The FP B28.Forced Performance Turbochargers: DSM FP Big 28 Turbo

And yes IPT is a reputable company for Auto upgrades.







4.
 
ill just stick to the stock ex mani and o2 housing till i upgrade to the fp big 28. then i will use the fp casit ex mani and 2.5" o2 housing to match the 2.5" turbo back

will the dejon smic be big enough for the fp big 28 up to 300 hp?
 
will the fp big28 be good at up to 300 hp? i hear it spools like a t25 but has the topend of a 16g
 
A FMIC would be a nice thing to add with what you have planned. You wouldnt have to get the biggest or best by any means but you would outgrow the stock side mount pretty fast. As far as the auto trans goes, those things are shockingly tuff with little to no work done to them as long as its not worn out. Maybe a shift kit and switch box and call it a day with what you have planned. The stock converter would be fine with the small turbo.

i def plan on a decent aftermarket trans cooler, and change the atf and filter regularly. so i wont NEED a new converter or shift kit? thats good i guess.

and i kinda figure the stock smic would be enough after i cleaned it, or alteast a larger smic with proper ducting. i'd just rather not have a fmic for the "sleeper" look, but i guess i will when i get to that point


Both of these posts said it best. The number one killer of automatic transmissions is heat. The FIRST thing I would do to ANY Auto car, modded or not, would be a better aftermarket trans cooler. For any kind of modded Auto, beefier end clutches and either a shift-box or a shift kit(both are good, but both together isn't really needed) will do you just fine.

But, if you plan on pushing the 14B at all seriously, just go with a FMIC. With Dejon UICP, 560cc injectors, 190 FP, 2G MAS at 21-22lbs on the 14B, I would heatsoak the stock SMIC pretty badly after a pass or two down the 1/8th. Even worse in any kind of traffic or city driving. But, if you live in a colder climate area and don't really plan on going balls out with the 14B, stick with the stock SMIC, or grab a cheap Supra SMIC.
 
Both of these posts said it best. The number one killer of automatic transmissions is heat. The FIRST thing I would do to ANY Auto car, modded or not, would be a better aftermarket trans cooler. For any kind of modded Auto, beefier end clutches and either a shift-box or a shift kit(both are good, but both together isn't really needed) will do you just fine.

But, if you plan on pushing the 14B at all seriously, just go with a FMIC. With Dejon UICP, 560cc injectors, 190 FP, 2G MAS at 21-22lbs on the 14B, I would heatsoak the stock SMIC pretty badly after a pass or two down the 1/8th. Even worse in any kind of traffic or city driving. But, if you live in a colder climate area and don't really plan on going balls out with the 14B, stick with the stock SMIC, or grab a cheap Supra SMIC.

i was just going to stick to the stock t25 with dejon smic 190 fp etc untill i can save up for the fp big28, 550's and dsmlink
 
will the wally 190 fuel pump be enough for the fp big28 with 550's and dsmlink, or would i need to re-upgrade the fuel pump to a wally 255 with adj fpr once i go with the bigger fp big t28, injectors and dsmlink?
 
so go with a 190 (not rewired) on the stock t25 and stock injectors, then rewire the 190 when i swap to big28, 550's and dsmlink?

so the 190 re-wired and 550cc injectors would be big enough for 250-300 hp on dsmlink?

or should i say screw the 190 and go straight to the 255 with an adj fpr?
 
anyone know of any smaller but good fmic kits that i can use on a 2ga and retain the oem foglights?
 
id go 255HP thats what im running with stock t-25 and injectors right now. not rewired... of course im doing a huge build. but dsmlink is said to manage fule pressure as well... at least thats what ive heard about it, someone correct me if im wrong, but ive heard you dont really need an AFPR at all with V3
 
id go 255HP thats what im running with stock t-25 and injectors right now. not rewired... of course im doing a huge build. but dsmlink is said to manage fule pressure as well... at least thats what ive heard about it, someone correct me if im wrong, but ive heard you dont really need an AFPR at all with V3

i thought you needed an afpr with the 255 fuel pump? so it'd be ok for me to run the wally 255 with stock injectors and stock ecu untill i upgrade to a larger turbo, larger injectors and dsm link?

any fmic kits i can use on a 2ga and retain the stock foglights?
 
Sorry if this has been said, but...

I would decide what turbo you want. Unless you want a tire hopping retard GST with lag for days, you want a street turbo.

I just found out myself that the evo III 16g turbo mounts up like the stock 2g turbo. But almost all other turbos don't mount up like these.

So with that said, you should decide what turbo you want first, because the front mount intercooler pipes will be expensive and there's no sense in doing that twice.


I plan on going with the evo III so that there will be less initial cost. Some existing 2g parts can be kept. The evo III 16g is a great turbo that will provide you the ability to pretty much max out a FWD drivetrain on the street.

You will want a Quaife LSD.

So if you decide to go with the evo III 16g, then you can get the front mount now with no worries if the piping will mount up.

I'm wondering if short route piping is a possibility with this setup. That's something that I've only just heard about but it sounds like something I would strive for.
 
Last edited:
anyone know of any smaller but good fmic kits that i can use on a 2ga and retain the oem foglights?

Ok lets answer some of the questions.

Do the rewire mod, period even if it's on the stock pump. that way when you upgrade the pump to 190, or 255 it's already done.

Figure out what Turbo you want to run, this will also decide which FMIC you will end up with.

The FP B28 Outputs to the passenger side, just like the stock T-25, and would require a "U" pipe to fit most of the popular FMIC's.

You are also an Auto. What this means is on the Driver's side where the Lower IC piping has an extremely tight pathway to the FMIC. It may or may not have to be routed under the front crossmember, and fans may have to be switched to slims. due to the fact that there are plenty of "transmission", and oil cooler lines, as well as the ABS equipment.


Consider a Same Side FMIC so you can route the piping all on the passenger side. (See my Avatar Pic, i'm also Auto, and running an FP B28) It's cheaper, and the homework has already been done. that and you won't crush it going over a speedbump.

And yes you can retain the Stock Fogs, bumper support, etc.

If you are going with the B 28, the stock 2g exhaust manifold is fine, the Stock O2 housing is also fine, just port it yourself, and save some money. (It's really not that much of a restriction on the B28)

Yes the B28 Spools like a T-25, and flows almost as much as an Evo 3 16g. it's very streetable.

Just do it :thumb:

Rewire Mod it's cheap to do , and applies to all pumps, upgraded or not

If you plan to stay with the FP B 28, and not go larger, then the 190 is fine, no AFPR needed.

255lph, get an AFPR

550-590cc injectors minimum.

DSM Link.

with the 2.5" exhaust you'll be fine.

Quit second guessing your actions, and keep it simple. Most of us running the FP B28 have almost the exact same mods.
 
im pretty sure im a lil stuck on the fpb28, so all plans are around this turbo...

im just trying to figure out if a bigger (dejon, bullseye) smic with good airflow and hard u & l ic pipes will be enough, or if i absoletely need a fmic i do not want it to be noticeable and i want to keep the stock 2ga foglights.


so, rewire stock pump with stock t25/injectors/ecu... and a wally 190 rewired with 550cc injectors will be big enough for the fp big 28 at 300hp?

as far as manifolds go im just going to stick to the stock mani untill i order the fp big 28, then im swapping to the fp cast mani with 2.5" o2 housing (whats the size of the evo3 o2 housing?)
 
i thought you needed an afpr with the 255 fuel pump? so it'd be ok for me to run the wally 255 with stock injectors and stock ecu untill i upgrade to a larger turbo, larger injectors and dsm link?

any fmic kits i can use on a 2ga and retain the stock foglights?

im running the 255HP not rewired with a t-25 and stock injectors no problem right now. just replaced my o2 sensor so i dont run rich anymore :rocks: but i just got a wideband to replace that anyway haha

I just found out myself that the evo III 16g turbo mounts up like the stock 2g turbo. But almost all other turbos don't mount up like these.


So if you decide to go with the evo III 16g, then you can get the front mount now with no worries if the piping will mount up.

I'm wondering if short route piping is a possibility with this setup. That's something that I've only just heard about but it sounds like something I would strive for.

the evo3 16g as with any 16g, 14b, and 18g do not bolt up to a 2g in stock, they bolt up to a 1g. for a 2g install you need 1g or 14b oil lines or a 2g install kit, as for a short route, yes it would work for that setup, would require a J pipe though. VRSF has a good short route kit that would go perfect for that setup, only bad thing :notgood: is their backordered til october, but ive heard their having a GB this month. so who knows?
 
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