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All-motor 3000gt SL.

4.2K views 50 replies 10 participants last post by  Blackphoenix13  
#1 ·
Guess I should move my build to the actual build catagory.
Original Post:https://www.3si.org/threads/1994-3000gt-na-build-thread.821583/?post_id=1056331468#post-1056331468

Mod list:
Engine:
Bottom end:
Block bored to 92mm
Italo grasso billet oil pump gears
Brian crower h-beam rods
Ross 12.5:1 pistons from 3sx
Fidanza aluminum flywheel
Top end:
Ported and polished heads
Ported and polished lower intake manifold
3 angle valve job
BC brass valve guides
264/272 cams
3sx adjustable cam gears
Ferrea competition plus +1mm intake and exhaust valves
Timing:
gates kevlar belt
Rvenge solid tensioner
Rvenge solid pullies
intake:
Breton performance engineering 6g75 holley intake plenum adapter
Holley Hi-ram intake hat
95mm GM LS throttle body,
Stepper motor delete
Misc:
Power steering delete
A/C delete
ABS delete
Transmission:
Quaife qdh7b ATB LSD
Engine management:
Haltech elite 750
Haltech premium engine harness
Haltech wb-2 dual channel wideband controller
Haltech ic-7 MFD
Complete OEM engine and body harness delete and rebuild
Body:
6-point cage
Body harness delete and scratch built harness was built and installed
Aluminum dash, switches,gauge cluster
Cowl induction hood scoop because intake sticks up through the hood 3 inches
Completely tin-canned
Omp trs-x seat
Omp 4-point harness
omp corsa steering wheel
Sparco spline quick disconnect
Kyostar hub adapter
Battery relocated to the hatch
Megan racing aluminum spoiler
Hatch reinforcement for the spoiler
Suspension:
Yellow speed coilovers
Lancer evox oem wheels
Gen1 Vr-4 BBK
Gen1 vr-4 knuckles, Tierod ends


Probably things im forgetting. Recently tuned by Tstuned at companyjet performance in phoenix az. Revs out to 9k rpms.
. Tuning video link.
Still a work in progress

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#6 ·
There is modification required but not to the intake. Gotta chop off the waterneck as it sits right on top of it. Once you do that it just bolts on with the stuff supplied in the kit. I was the first guy to put one of them on a 6g72 before they were made for the 6g75. So I worked a deal with breton performance i took one that had a minor defect that didnt affect it. A nick in one of the spacers for like $600. In return i had to do an install video, A list of all changes, List of new hardware i had to change to get it to work. Now they sell it as a kit for the 72.
 
#9 ·
have a dyno or virtual dyno graph to share?
 
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#10 ·
as of yet no. But i can just pull the logs off the haltech 750 and should be able to run them through virtual dyno. I just got done swapping the clutch and timing belt. Timing belt had 2 splits in it but not snapped. And the clutch was gone on 1 side after the tune lol. Probably pull those logs off tonight.
 
#11 ·
Finally got to drive it after the tune and doing the timing belt and clutch. ITs stupid easy to just rip burnouts pretty much any throttle input and just rips a burnout lol. Did a rolling burnout 1-3rd gear going down the road. Made me just die laughing at how ridiculous it was. Then let off the gas and its like its got a ratchet g35 pops and bangs tune but it doesnt. They did add decel fueling to slow down the rpm drop from the aluminum flywheel. Definintly slows that engine decel down by a bit. Before it like an EV with strong regen braking were it can give you wiplash just letting off the throttle. Definintly just woke up my entire neighborhood ripping it around and with high rpm pulls, burnouts and cannon fire. lol.
 
#12 ·
Took her out to the first cars and coffee shes been able to attend. Definintly draws a crowd. Looking forward to december 7th when fuel fest comes to scottsdale. Might even be some videos floating around of me roll racing a few cars on the way back and leaving with a burnout. Wasnt really trying to but if you so much as breathe on the throttle in first gear its instant burnout lol.
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#13 ·
So got some updates. Fitted a set of mishimoto raceline 1875cfm fans on the radiator to deal with creeping temps at stop lights, Snow performance water/methanol kit got it set up in the haltech and scheduling the tune. Fitted a set of omp pedal covers..Tbh they feel much better than stock and makes it easier to heel-toe. Been a busy little bee lol.

Dropped a new youtube video as well.
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#17 · (Edited)
Was absolutely sending it on the way home after work and yes i drive this car to work as well. Its honestly pretty streetable considering it really shouldnt be. Its gotta have 1 of the weirdest engine sounds. Sounds like a v4 motorcycle or a ducati when its 4-9k rpms. and after 4-5k rpms and that intake and cams both start to really hit and it just stands up and really starts going. Rolling burnout under a bridge on the way home lol.edit:removed a reposted video.
Some of the driving i do i just dont record it. But you can just send it and its something. Totally worth all the money and time for the build. Even if its only making 305whp. Still has some power on table. As its flex fuel capable i just havent tuned for it yet. could be another 10-25hp.
 
#15 · (Edited)
if the "water/meth" injection is meth, then it can potentially add power. if it's water, then it cannot. it's only detonation resistance to add timing and lean it out, but not directly add any power; but why displace that valuable combustions space when you can run methanol or race gas instead?

if you really want NA power, run M1 as primary fuel and add some nitromethane. that will really get you a nice crackle/burble tune :D
 
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#16 · (Edited)
Yea its got methanol in it. Even though it is mainly for removing heat and giving it more timing. And i plan on tuning for nitro eventually lol. Mostly because i want to just send it down the strip. Can imagine some 3s guys shitting bricks if break into the 9second range with an SL and no forced induction. Oh and it runs on 100octane race gas. Either 260gt or a brew of 91 and octanium that i have everything pre-measured to be mix together so i get the same mixture everytime. The water/methanol system is mostly an experiment to see if i can get some benefits off of it in a hot/dry climate like phoenix az and be able to turn up the wick a bit more. Evaporative cooling works particularly well here. We have like a 200% evaporation rate. And the kit was only the stage 1 $370 kit because i had already planned on using the haltech ecu to control it. So didnt think i needed all the bells and whistles. So im ok with maybe wasting the $370 on a possibility.
 
#18 ·
Had a little snafu happen. Car just quits on me doing a pull at around 5k rpms. Got it towed back to my place. And initially the nylon screen i was using to prevent FoD getting sucked into the engine was melted and injested into the engine. Got the intake valves cleaned off. Borescoped the engine and no further damage. Still wouldnt start. Go to check timing and find the cam sensor wires ripped into 2. Cheaked timing incase the cam gears ate the wires nothing cars perfectly in time. So atleast i had that. Not sure exactly what happened it looks like maybe the timing covers chaffed the wires in half. Removed the cam sensor and repaired the wires with brass crimps and adhesive filled heat shrink. Then mounted better cable routing on the timing cover to prevent anything like that happening again. Running fine now. Have the cam sensor wire slightly pulling down to keep it in the groove and away from being chaffed. And should prevent it from popping up and getting caught by the cam gear. Did the same thing with the crank sensor wires as well just for a bit of insurance.

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#20 ·
Yea glad it wasnt something more serious and i was able to clean the intake valves off with some industrial strength purple power without removing the heads. Took a couple days of setting a pair of pistons to TDC with valves closed. Filling up the runner with the stuff and leaving it over night. Then blasting it all out with a high pressure air hose. borescope it then repeat that process albeit without the soak time until the pair were clean then move to another pair. Took about a gallon of the stuff and it ate the skin off my hands but I got it done. Left the spark plugs out and used the hose for a compression tester to generate some compression and blast any that got past the valves out of the cylinder lol. The cam sensor took like 10 minutes to remove,fix then replace. Wasnt a big deal just glad I caught it. Took it out for a drive and got to laugh at the looks i get driving to work in a gutted out 3000gt with an aluminum dash and loud as hell. Just ripping it down the road. Not to mention the, "I ❤ Meth" sticker from the methanol kit on the back window lol. GF is not amused, but I don't care.
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#21 ·
So as the temps keep getting colder she keeps getting harder and harder to start up. So took a degree of timing out and increased transient throttle correction from 10%to 20% and made a major difference in start-up. So anyone writing a tune taking timing out in cold temps can help reclaim some lost driveability. It allows the pistons to travel up farther in the cylinder giving you more compression and puts fuel closer to the spark plug to light it off. Makes a big difference when you got bigger cams with more valve overlap which lets more compression past the valves on coldstart.
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#23 ·
Went to fuel fest in scottsdale probably had about 120 people talk to me about the build and more that didnt and supposedly some big camera crews were filming it. Most people got their interest peaked by the holley intake or some were like eh mild aesthitics build then started actually looking at it and were like oh shit this is insane. Even the flagger was like holy crap a 3000gt did you swap it? it doesnt sound like a mitsubishi..I replied it is in fact a mitsubishi 6g72 just built to shit all-motor lol. So out here representing in scottsdale. Tyrese had us running to our cars lemans style to do some 2-stepping so you know I had to join in lol..

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#25 ·
So many people asking me about it. getting the tour. Most of them either got drawn in by the holley intake thinking i fwd v8 swapped a 3kgt, Or going eh its a mild aesthetics build then looking under the hood and go oh shit this is insane!. Prolly a 120 people by the end of the night bunch of groups of 4-5 people. Then tyrese had us lemans style running to our cars at the end of the night to 2 step our cars. And on the way out a bunch of kids asking me to rev it up and having it throw a bunch of fireballs out the exhaust lol. Had a good time man. Makes it worth all the time and effort.
 
#33 ·
So figured id finally post an update. car caught on fire. Got the engine out, Welded up the firewall and sealed off any holes, Sending the car off to velocity race fab for a new cage. Going for a wilwood floor mounted pedal box, New hardlines, 280 cams, dual (quads) 4150 throttle body intake, Re-paint the engine bay and hood, repair the engine, and re-build the haltech harness and body harness. Velocity race fab should be here in the morning to pick her up for the new roll cage. Thats the single most expensive thing. After that should be a bit faster.
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#35 ·
Shes off to get her new rollcage @chrissadowski at velocity racefab. Then moving to the next phase re-painting the engine bay, pedal box and hardlines,engine install,harness. Going tp a floor mounted pedal box so no oem master cylinders required. But lots of new clutch,brake and fuel hardlines.





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