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Street Build LTA 1998 GSX - 9 Second Streetcar

Year:
1998
Model/Trim:
Mitsubishi Eclipse GSX
Please Support STM Tuned
Please Support STM Tuned
  1. Farmcar

    Farmcar Proven Member

    32
    10
    Joined Aug 6, 2013
    Portage, Michigan
    Congrats on the win! Car looks great
     

    Drag Race Build 3K  8

    1990 Plymouth Laser RS Turbo
    11.34 @ 130 · 1G DSM
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    spoolinpos likes this.
  2. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Well, two new additions coming up! I'll dive a bit more into detail once installs are finished up!

    116287769_3259513824272746_3178516801233184810_n.jpg

    108158174_299918274452335_144469531775350295_n.jpg
     

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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  3. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Well I finished up the Forced Four smart 100.1 shift box installation and pretty sure I have it configured with everything I want it to do! I decided to totally ditch the OEM TCU and use this unit to shift on street as well as track. I believe I still have a little bit of values to tune for street driving, but it's close to be dialed in.

    A couple really nice features of this thing (especially being limited with ECMLink's input and outputs) is that it gives you a couple of inputs you can use to log data! I haven't started to log anything yet, but I'm sure I will find something to log at some point (Maybe coolant pressure, oil pressure etc...) Another AWESOME feature is the stall up mode, which allows the car to be in 2nd gear while on converter, so between stall up mode, and the Audi vacuum pump I should never have to worry about the car over powering the brakes while being on the converter.

    And, one of the selling points of this unit to me is that ability to configure two separate outputs. I am only using one of these outputs, so I have another if I find a use for it. This was important to me due to the use of n2o. I have ECMLink controlling the n2o to get on the converter, since I am able to use a min/max boost parameter. So I have it set on ECMLink to shut off at 10psi on street tires, probably 16psi on the M&Hs. Now, I don't like the idea of having the n2o spraying the entire time I'm on the 2 step, so having this extra output allows me to tell ECMLink to shut off at my desired boost value, then once I launch the shift box is set up to control the nitrous! The parameters used for the shift box are 1st, 2nd, 3rd, 4th gears, TPS, Brake switch (really cool), RPM, and vehicle SPEED, which is what I use to tell it when to shut off.

    Install was pretty straight forward. I made a simple mounting bracket out of aluminum L to mount in the factory TCU location, and had already identified a lot of the TCU harness wiring from my old forced four shift box. I love that this box has a computer app to control it, it was really a pain in the dick to enter settings into the old unit. I highly recommend this part for anyone modifying an auto car!

    116287769_3259513824272746_3178516801233184810_n.jpg 115995719_282781162816708_891700598957603827_n.jpg 109781024_1750060311811879_271274136519790260_n.png 109688265_289603562342509_7934487850651788410_n.jpg 117807360_325143935201248_4235364729210951534_n.jpg
     
    Last edited: Aug 16, 2020

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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    1990TSIAWDTALON and d1prospect like this.
  4. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Here's the update on the steering wheel and my COWBOY button.

    A friend of mine had one of these Grant GT wheels in his car, and I really liked the styling and the feel to it. It is about 13" diameter wheel, so a bit smaller than the OEM wheel. The pain in the ass about this little project was the NRG quick release. The steering wheel is a 5 bolt as you can see in photos, which is fine because NRG does make a 5 bolt quick release. Well, what I didn't know, is in the 5 bolt steering wheel kit from NRG, the steering wheel hub adapter is also 5 bolt, and not 6 bolt, which is what my hub adapter is. Long story short, I don't believe NRG makes a kit the combines the 5 bolt steering wheel mount, and a 6 bolt hub adapter, so I had to purchase two separate NRG kits to make it work (SRK-350BK and SRK-250BK) . Oh well, it's mounted and working properly so what can ya do.

    Now, the COWBOY button. I didn't like the idea of being forced to use n2o with whatever parameters I had set in the shift box. So I had to make a choice before the run where I wanted to nitrous to shut off based on MPH. This solution allows me to turn the nitrous off via shift box early in the run (example tell shift box to shut n2o off at 80mph instead of 115), but allows me to override the system during the run and activate the n2o if needed. This momentary switch and bracket are from Motion Raceworks, really cool company with some bad ass products.

    I'm really looking forward to putting this recent round of mods to the test, as at the end of this month I have another PYOP hardtire event, and an IFO event in Hebron, OH.


    117817780_1186811398366679_6871229249325825918_n.jpg 117634173_328112975040052_5033175390839664965_n.jpg 117968320_602727670427584_7278662452522348494_n.jpg
    117946749_2627446070901636_728403854119704143_n.jpg
     

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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  5. d1prospect

    d1prospect Proven Member

    388
    45
    Joined Mar 14, 2004
    Glen Bunie, Maryland
    Sharp, keep up the good work. Car is well balanced and super clean.
     

    Street Build 4K  18

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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    spoolinpos likes this.
  6. b00stedtalon2

    b00stedtalon2 Proven Member

    1,069
    576
    Joined Dec 19, 2005
    Detroit, Michigan
    Everything came out great. Nice work!
     

    2K  1

    1994 Mitsubishi Evo
    automatic · Lancer Evolution

    Street Build 4K  1

    1993 Eagle Talon TSi AWD
    9.585 @ 143.96 · 1G DSM
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    spoolinpos likes this.
  7. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Well, took the car out to IFO Hebron and entered FIS class. First pass off the trailer testing 75 shot and the new shift box yielded a new PB of 9.855 @ 138.67! Terrible TERRIBLE 60' of 1.639 and the new shift box seems to shift way faster than the old box, so I had my shift points sent wayyy too low. Car shifted 1-2 at 8k, and 2-3 at 8200, both of which I typically shift around 8700.

    This was all very promising to me, as I saw A LOT can be improved on. This was the first pass I had turned the nitrous off while on the two step. I did not like the idea of sitting on the 2 step with a 75 shot spraying the the same time like I have done with 35 and 50 shot just fine. I believe there's a bit of a delay from the shift box reactivating the nitrous when I let off the brakes, so I figured that's the reason for the terrible 60'. I decided to try what I have been doing in the past with the smaller shots, and spray while on the 2 step.

    2nd pass, car gets on the converter just fine and reaches the two step, then it just... shut off. Like I turned the key to the off position. Really weird, as this has never happened to me. I fire the car back up after a bit of cranking, and chalked it up to maybe the system being flooded while being on the nitrous. So I will switch back to turning nitrous off while on 2 step (shuts off when I reach 18psi).

    3rd pass, which is eliminations round 1, Car seems to get on converter fine, two step is all normal, let off the brake and the cars moves but then suddenly shuts down on me. Pack up and head home.

    Compression test showed number 3 at 90 psi, so something's hurt. I leak down tested and pinned it to the exhaust valves. Strap on the spark plug was also melted. The head is already at the machine shop getting repaired. I plan to step the nitrous back to 50 shot just as I had it at the last event. The car never skipped a beat with the 50 shot, and it seemed to love it. I will be most likely upgrading from ECMLink and moving away from wet shot system to dry shot over the winter, maybe then I will try a larger 75 shot then.

    Anyway, had a great time with friends regardless of how it went down. That's racing for ya, time to get it fixed and try the hit the last two events I wanted to go to for the year!



    118765246_10117990230360964_3398607307869197901_o.jpg 118655221_10224083707104323_6420468852279060220_o.jpg 118730295_10117990233454764_6349223378688305952_o.jpg 118438114_314762623300795_5167240916912009624_n.jpg
     

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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  8. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Alrighty, well a bit of an update. I found out that the two intake valves on cylinder 3 were leaking, and the exhuast valves actually turned out to be alright, but had some aluminum stuck on them and cleaned right up. Got the car back together and just missed out on my local PYOP no prep event for the month of September, due to me being a moron and breaking my map sensor LOL. All is well, as I had more time to get the car ready for the PYOP event at Pacemakers, hard tire class.

    That was a completely different experience of PYOP than I'm use to. These guys start at the front of the track, so there was still some prep on the surface, and the track just kept getting stickier as the night went on. Those hard tire guys down there are for real also, they were hooking and putting power down, they were fast! I had a blast down there, and hope to bring a bit more for them next year!

    I made it to round 3, with terrible launches as you can see in the videos, and we decided to try and turn it up out of the hole, I was going to need it to hang in there. Well, it didn't go so well, as the car's power ramped in the tires and prepped surface caused wheel hop, and then snapped the passenger side rear axle as pictured.

    There is one last event I wanted to make, and that's my local no prep October 16th, but I just caught news that the build time for my axles are 4 weeks out, so that's a wrap for this year! I learned a lot, and accomplished my goals, I have nothing to complain about! I'm looking forward to getting back out to events next season and give er hell. I'll post up some videos of the Pacemakers event!

    Round 1: Front brakes were actually hanging up from me adjusting the brake switch in too far, fixed between rounds 1 and 2. This notch was on nitrous as far as I know as I saw the purge.



    Round 2: Launch was really bad, had to run him down. The yellow mustang hooked great, and made some good power, I don't know specifics, but I do believe I heard a supercharger in the staging lanes.




    Round 3: Snapped rear passenger axle, fast ass truck though, I believe nitrous powered.


    120490967_10164591956960122_2896757593805266134_o.jpg

    I have a couple things in mind for winter upgrades, but not 100% set or sure on all of them yet, so I will try and post updates as they happen! Thanks!
     

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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  9. TK's9d2TSi

    TK's9d2TSi Supporting Member

    4,041
    1,508
    Joined Sep 11, 2017
    Cincinnati, Ohio
    I’ve never seen the tree light straight to green after staging. Car seems pretty consistent and not too bad if you just broken an axle. Are you planning to upgrade axles? Love the car:thumb:
     

    524  3

    2000 Jeep Cherokee Sport - Classic
    awd · automatic · Misc Vehicles

    553  4

    93 Civic 4 Door -sold-
    fwd · manual · Misc Vehicles

    Street Build 3K  5

    1992 Eagle Talon TSi AWD
    12.2 @ 120 · 1G DSM
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    spoolinpos likes this.
  10. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Yeah seems like these pour your own puddle (pyop) and no prep events use stright to green. My local pyop no prep event I go to uses a flashlight start.

    I ordered a set of Driveshaft shop's 800hp rear axle set. I think they may be a newer option from these guys, as I don't recall seeing them before. I just recall the 900 hp option that comes with larger splined axles and a new hub to go with it, or a 650hp option which I believe you had to reuse your oem inner cups.

    This new option is a direct fit into oem hub, and comes with their own inner cups with 300m stubs and chromoly CV internals.
     
    Last edited: Oct 1, 2020

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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    1990TSIAWDTALON and TK's9d2TSi like this.
  11. TK's9d2TSi

    TK's9d2TSi Supporting Member

    4,041
    1,508
    Joined Sep 11, 2017
    Cincinnati, Ohio
    Ahhhh! PYOP light makes sense. Yikes $1200 just for rears. But I’m sure at those power levels, that’s nothing. We have to pay to play :D
     

    524  3

    2000 Jeep Cherokee Sport - Classic
    awd · automatic · Misc Vehicles

    553  4

    93 Civic 4 Door -sold-
    fwd · manual · Misc Vehicles

    Street Build 3K  5

    1992 Eagle Talon TSi AWD
    12.2 @ 120 · 1G DSM
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    iugrad92turbo likes this.
  12. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Ya a little unexpected set back, still not as bad as the $2100 option they offer! LOL
     

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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    iugrad92turbo and TK's9d2TSi like this.
  13. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Well, I have decided to shut it down for the rest of the season, and begin the winter mods. After my last outing, my plans have shifted pretty dramatically from what I was planning. I really wanted to step into a 62mm turbo and divided T4, but after snapping an axle I have since decided to shift totally onto the drive train. I'll just give a brief run down on what will be done over winter on this post, and maybe make a bit more in depth post as I go through each project.

    Starting towards the front of the car, I will be going with a basic built 300M transfercase. I will be going with the stronger (so I've been told) early year 91-96 12 turn Tcase, so the transmission will have to come out so I can swap out the front diff's ring gear and also the front output shaft to the early year gearing. I have since sourced the ring gear and front output shaft, and still need to order the 300M tcase later this winter. At this point in time, the 300M Tcase is the last larger ticket item for this winter, so I feel like I'm off to a decent start!

    121454880_647482705907465_5270566785450176180_n.jpg

    Well, with a 300M Tcase, comes a solution for that larger tail shaft. I have ordered DSS heavy duty 3.5" Aluminum drive shaft from @twicks69 TMZ, coupled with the stronger SONNAX 25 spline yoke. The build time on this was like 8-10 weeks, so I don't have that part just yet.

    Now, The rear differential wasn't damaged at all when the axle snapped, but I know how flimsy the 2g rear diff's covers are, so I have ordered a Frontline Fab girdled diff cover. Upon removing the old rear diff bolts, I found my oem bushings were trashed also, so I ordered a set of POM (polyoxymethylene) rear diff bushings from @Gsx-Dude! I also found that pretty much all the main hardware on the rear subframe is seized and trashed, also a lot of the bushings are not in great shape. I ordered up a set of @99gst_racer Volk Metal Crafts aluminum rear subframe bushings, and a set of Prothane's rear bushing sets to just replace everything. I'll refinish the rear subframe in POR15, and try to make it look as nice as possible.

    121084895_656323528637923_6001048320487076816_n.jpg 121179303_344422903307649_4417063569053243744_n.jpg

    I don't have the Frontline Fab cover yet, so no photos of that.

    And finally, what FRICKEN started it all.... My new axles ordered through @extremepsi have just arrived from DSS. These are their OEM hub direct fit axle option, which I want to say is a bit newer? Anyways, rated at 800hp, a friend of mine is using them on his mid 8 second EVO2, and I really like the material they use. They look great!

    DSS Axle 2.jpg DSS Axle 3.jpg DSS Axle 4.jpg
    That's all for now. I've already started on things for the rear subframe, so I'll start on other things once the rear is all finished and buttoned up. When these rounds of mods are all said and done, I'm really hoping to be able to take the car's 60's into the 1.3s. Time will tell, but that's the goal for now. The car's drivetrain being this much more robust will also give me a piece of mind on the hard tires for those pyop events! cheers!
     

    Attached Files:

    Last edited: Oct 14, 2020

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
    Loading...
  14. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Well I'm still the process of wrapping up the rear subframe and rear suspension overhaul, but I did manage to finish up the rear diff and got a few other parts in! One I wasn't really planning on changing up for next year, but I went ahead and picked up a Precision Industries #6 converter, so I'll be stepping away from the IPT restall. Also, I got the Jeff Bush/English Racing 300M Transfer case in, the tail shaft is a unit! I will not be using the spicer slip yoke that came with the transfercase, as I upgraded my DSS driveshaft with the sonnax unit.

    122002469_819697468792029_4005583829868791855_n.jpg 121822834_348464013109918_7424331407386345908_n.jpg

    122457759_826394851452426_7501262692155003594_n.jpg
    123463986_393355781850618_8810770717554583406_n.jpg 123820455_998096664003714_7515301804817604338_n.jpg 124060562_2718111608411830_161822450844626824_n.jpg

    The rear diff I pretty much just cleaned up, refinished it in POR15 and installed the BEAUTIFUL Frontline Fab diff cover to get away from the flimsy 2g diff cover.

    Rear Diff 1.jpg 123563760_374781583945776_2176495349452150423_n.jpg 123916982_3117391925032397_2437621460145949218_n.jpg 123389292_1235641083474350_1942275320629488453_n.jpg

    Stay tuned! The rear subframe will get it's own post when complete! I have everything refinished, just gotta press in all the bushings!
     

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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  15. Talon96fwd

    Talon96fwd Proven Member

    316
    33
    Joined Apr 11, 2011
    Alexandria, Virginia
    I’m drooling!!!!!
     

    1K  0

    1996 Eagle Talon TSi
    14.184 @ 104.365 · 2G DSM
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    spoolinpos likes this.
  16. spoolinpos

    spoolinpos Proven Member

    136
    124
    Joined Feb 13, 2008
    Fraser, Michigan
    Rear subframe, axles, and suspension are finished and installed. I'm happy to be done with removing old bushings, that was getting old ha. Everything seems to be nice and firm back there now with the prothane kit. I'm hoping that will help keep the car planted better going down the track. I'm happy with how it all turned out, it's also nice knowing I can adjust toe now since the new OEM hardware isn't seized like it use to be LOL. The DSS rear axles fit and look great!

    As for the spare wheel well, I have an Al cover I was using before taking the well out, that I will be adding some support to and reusing. If for some reason I don't like it, I will possibly go with a vendor's 2g spare wheel cover. Having that wheel well removed makes life way easier for any kind of service back there. I wouldn't recommend it for weight reduction, as it's not very heavy at all, just wanted to throw that out there for anyone thinking about taking it out for that reason.

    Plenty more to do during winter! Up next I believe will be pulling the trans to swap out the front diff ring gear and front output shaft for the 12 turn 300M Transfercase.

    X Suspension 2.jpg

    X Subframe and sus insalled 4.jpg
     

    Attached Files:

    Last edited: Nov 25, 2020 at 3:38 PM

    Street Build 3K  15

    1998 Mitsubishi Eclipse GSX
    9.855 @ 138.67 · 2G DSM
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