The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support Morrison Fabrications
Please Support Morrison Fabrication

Help with maxing out my 14b, who's done it? 18psi on 94 oc?

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Turbonium

20+ Year Contributor
175
0
Jul 22, 2002
Ithaca, New_York
alright my setup is different now then from when i made my profile and i'm still adding to it. but right now what i have is a starion FMIC with a 2" pipe welded on one side and 2.5" welded on the other. My IC pipes start out at 2" from the turbo down to the FMIC and from the IC to the throttle body i have 2.5 inch pipe. i WILL be buying a GM MAFT and turbo xs rfl. i'm in the process of putting in a 190lph walbro pump (i didn't want to mess w/ getting an AFPR) now i plan on running 93-94 octane gas which is fairly easy to get around here. other than thta my only mods are 2.5 inch exhaust and k&n filter. i would like to run about 18PSI and i really don't want to mess around with getting injectors..... Will the 94 Octane and 190LPH pump be enough to meet my fuel needs?? i know w/ a stock smic and stock MAS i could probably get away with it but i'm not sure how the new FMIC and 2.5" IC pipeing will affect it or how much the MAFT affects it. thanks alot guys
Ryan
 
come on nobodys got any advice for me?? lately i've been thinkin i might just be safest running 15psi until i buy 550's. is the MAFT fairly accurate on the 550 settings i have no way to know what my knock is or anything like thta so i'll be driving blind. thanks
Ryan
 
I was able to run ~17 when it was warm out on my 14b. Once it cooled off, my airflow was too high and I was fuel cutting (Here it was below 10F for several weeks and I was fuel cutting even at 15psi). I put the 580s in last week and am currently running 18, looking for 20 in a few days (working my way up slowly).

...then again I am running water injection...
 
see honsetly i want nothing to do with water injection. it's something i know very little about and something i just don't want sounds like a band-aid fix to me. but thanks for your input:thumb: . i guess 15 psi will do for awhile anywayz. but who know about how safe the maft is. i've looked up all the information i could so please don't tell me to "search" from what i saw it looks like it sets it a little rich to keep things safe from knock and such, are the settings easy enough to work w/ out a dsmlink?? thanks
Ryan
 
Well, if you want to get the most out of it, you need a real intercooler.

Also, once you start getting real airflow you're not going to be able to run more than ~15 psi on 450's on pumpgas.

I have a 14b, SMIC, and 620's. I can't run more than 17-18 psi on pump gas, anything higher requires that I richen it up so much that I start to lose power.

You need fuel control, bigger injectors, cams, and plenty more. You've got a ways to go before you're maxing it out.
 
Don't worry about it man,, i run 16psi all day and im fine with stock fuel system..
i have a fmic but even my buddies without them run 16

i bet i could hit 17psi no problem on a warmer day..

once i get my 190lph i llbe runnning 18 but thats only cuz the fmic, if i dident id run17 all day with just the pump (and rewire of coarce)

When my boost controller was busted i ran 22psi once and dident hit fuel cut, i went to about 5000 rpms though...
 
Originally posted by Turbonium
see honsetly i want nothing to do with water injection. it's something i know very little about and something i just don't want sounds like a band-aid fix to me. but thanks for your input:thumb: . i guess 15 psi will do for awhile anywayz. but who know about how safe the maft is. i've looked up all the information i could so please don't tell me to "search" from what i saw it looks like it sets it a little rich to keep things safe from knock and such, are the settings easy enough to work w/ out a dsmlink?? thanks
Ryan

I was fine running 18 this morning w/o the water. You will want a fmic before going this high/higher though.

The maft is like any other piggyback, you set it where you need it for your setup.

To change settings, you turn a knob. Seems easy enough to me :D
 
Is that so? And, are you datalogging?

Additionally, how fast is the car? How much power does it make, or what does it trap at in the quarter?

It's easy to think you're ok if you don't have a logger to see the knock.

It's also easy to be ok if your setup sucks and you don't flow shit for air at 16 psi.



Originally posted by TSIsean
Don't worry about it man,, i run 16psi all day and im fine with stock fuel system..
i have a fmic but even my buddies without them run 16

i bet i could hit 17psi no problem on a warmer day..

once i get my 190lph i llbe runnning 18 but thats only cuz the fmic, if i dident id run17 all day with just the pump (and rewire of coarce)

When my boost controller was busted i ran 22psi once and dident hit fuel cut, i went to about 5000 rpms though...
 
the higher the psi doesnt necessarily mean more power is that correct??
 
I've got a 255 lph walbro, and i some times crank out 17 psi on my 14b. :( it scares me though.
 
i do have a FMIC its a starion w/ 2.5 inch piping but it's at least an FMIC but i would also be running 18 w/ the maft blow through style, so i would be flowing alot more air than a stock set up at 18 psi... thats why i was wondering. i will have a 190lph pump installed and i already have the fuel pump rewired (battery is in the trunk). but i just wonder if that will be enough fuel. thanks and keep the help coming.
Ryan
 
Im running 19psi on my 14b now
550's
Supra SMIC
255 hp
No knock at all
 
First i would loose the idea of the 190 fuel pump and just buy a 255pump. it will support much more fuel and is the same price. Was one of my first mods. W/o a fuel pump i'd keep the boost around 15to be safe. Once you get a pump, think about a datalogger program so you can see if your getting knock. If you have no knock then your safe to turn it up. Second before pushing the turbo through too much boost i would concider getting the rest of your exhuast and maybe hacking the aircan and or getting an intake pipe. Try to follow the performance guides. With out injectors you will probobaly get too much knock past 16-17psi so i wouldn't turn it up that high unless you can watch to see your knock. Your stock SMIC is good for a good amount of power, my stock intercooler and pipes put me at 12.74 at 19 psi on 110 octane so done rush too quick to get a fmic. It would be best to also get the MAFT or an SAFC once you get some fuel mods so that you can make adjustments but above all i'd say get a datalogger so you can see what's going on. You can check out my profile, its updated, looking to hit low 12's w/ the 14B and the mods that i did over the winter. Stock turbo is still pushing out lots of power, Max out a 14b, you have plenty of time before you have to worry about that. Good luck. Keep us posted.
Gooberlog
 
well ok like i said i have a FULL 2.5 inch exhaust, a k&n without an aircan at all. i already installed the FMIC. i also want the 190lph because i do not believe i will max it out and i do not want to buy the 255 because most people need to get an AFPR for the 255 or it over runs the stock FPR. i followed all the tuning guide lines on this site. i wantedd the FMIC already becaue the stock pipes are fine on 110 octane on the track, but on the street w/ 94 octane my goal of 18 psi would heat soak the stock system rather quickly i believe, and i want something that has the same performance all the time not somthing i take for a quick run and have to let cool down. i haev the car off the road for the winter so i'm doing all this stuff at once not just adding stuff on as i drive the car. The FMIc was also to help me get a SAFE 18psi on 94 octane but everyone is seeming pretty skeptical about 18 psi even w/ the 190 and FMIC so i guess i'll stick to 15 psi untill i can afford injectors. thanks
Ryan
 
2.5 inch exhaust is a waste, go 3" at least. Get a 255 walbro unless you wanna do it twice. 12's on a 14b doesnt take mods. It takes driving and race gas. 310 whp on a 14b, now that'll take some mods. If you want more specifics of just running 12s, PM me but its pretty basic/straightforward. The Starion was a waste of money. You mightas well have rigged your sidemount to the front of your bumper; same deal.
You will not be maxing your 450's out. On 22 psi, I was taking fuel out still, not much, but still -3 to -8 from 3500-7k
 
well the 2.5 inch exhaust may have been a waste but i already have it so no changing now i am going to put a pipe through the cat and add a resonater soon. when i got the echaust i was concerned about boost creep since at the time i hadn't even rewired the pump and didnt' have a boost gauge so had no way to know if it was even creeping. i don't want to just run 12's on the track i want a car that could run 12's but i just want to be able to drive it daily, thats why race gas is out of the question, 94 i can get at any of the 5 sunoco's around me so thats the best i can do, although Watkins Glen is only 20 mins from me and i always thought filling the tank up w/ race gas would be sweet, anyways. i do not believe the starion was a waste the ends have been rewelded w/ 2.5 and 2" pipes so it has to be better than stock maybe not substancially but for 100 bucks and free welding i took the deal. Turbospoolin when you ran 22 psi on the 14b you were running race gas correct? any kind of FMIC? or anything liek that, 2.5 inch IC piping? if you could run 22psi w/ race gas i would think 18 on 94 octane might be safe.......... thanks everybody for your input so far.
Ryan
 
Originally posted by TSIsean
Don't worry about it man,, i run 16psi all day and im fine with stock fuel system..

I'm running 17psi, i drive my car everyday to and from school and work. It does 12.8sec in the 1/4mile and 4.6sec 0-60 on a g-tech (stock fuel system). I don't get any fuel cut. However before i got the 3inch exhaust and the ported out turbine housing i was getting fuel cut at 5500rpm and my boost gauge would hit 22psi and stay there under WOT in 3-5 gears at like 4000rpm to redline. haha
 
Originally posted by Turbonium
well the 2.5 inch exhaust may have been a waste but i already have it so no changing now i am going to put a pipe through the cat and add a resonater soon. when i got the echaust i was concerned about boost creep since at the time i hadn't even rewired the pump and didnt' have a boost gauge so had no way to know if it was even creeping. i don't want to just run 12's on the track i want a car that could run 12's but i just want to be able to drive it daily, thats why race gas is out of the question, 94 i can get at any of the 5 sunoco's around me so thats the best i can do, although Watkins Glen is only 20 mins from me and i always thought filling the tank up w/ race gas would be sweet, anyways. i do not believe the starion was a waste the ends have been rewelded w/ 2.5 and 2" pipes so it has to be better than stock maybe not substancially but for 100 bucks and free welding i took the deal. Turbospoolin when you ran 22 psi on the 14b you were running race gas correct? any kind of FMIC? or anything liek that, 2.5 inch IC piping? if you could run 22psi w/ race gas i would think 18 on 94 octane might be safe.......... thanks everybody for your input so far.
Ryan


Yea, 22 psi was on race gas. On 94 I don't see why you can't run 18 psi. 94 octane should be enough that you will see minimal knock.

I didn't have a fmic(stock 1g smic), stock IC piping, stock injectors, stock 1g manifold, stock 1g 02, etc... It was just semi tuned to about 11:0 a/f on the dyno and alot of stuff was stock.

You could daily drive it or weekend drive it on race gas if you want. I did for a while when gas prices were near $2/gal for 92 octane, I just went and got 110 for $3/gal. :D
 
i keep reading different info...i read that you cant raise ur psi past 16-17psi coz then it wont be efficient and ull be blowing hot air...because the intercooler cant handle it, but now i read that 22psi on race gas and stock everything...
 
the 14b is still efficient past 16-17 psi it's the T-tosmall that has problems over 15psi but some people can get more outta it. see i have no access to a dyno and just simply can't afford an AFC or anything to tune w/ other than the maft. turbospoolin since you haev been on a dyno do you know where 18 psi will put me w/ my mods?? at the wheels or crank if you have any rough idea i'd liek to hear it. i know tuning is a big issue and going on a dyno is the only way to tell but i'd still liek to hear whta you think. thanks
Ryan
 
Originally posted by Turbonium
the 14b is still efficient past 16-17 psi it's the T-tosmall that has problems over 15psi but some people can get more outta it. see i have no access to a dyno and just simply can't afford an AFC or anything to tune w/ other than the maft. turbospoolin since you haev been on a dyno do you know where 18 psi will put me w/ my mods?? at the wheels or crank if you have any rough idea i'd liek to hear it. i know tuning is a big issue and going on a dyno is the only way to tell but i'd still liek to hear whta you think. thanks
Ryan

Well, to give you an idea, without an afc, with a 255 walbro, and below 10.0 a/f after 4k rpm, I netted a whopping 244 whp on 16 psi. Never got around to caring to tune it on pump gas. My buddy with a 1g w/ a stock rewired pump on 17 psi did 240 whp but running kinda dangerously lean... 12.0-13.0 at some points for a/f. I'd say 18 psi, untuned for the way it sits should bench-dyno you in the mid 240s to 250ish range.
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top