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Thread: L47/Aurora 4.0L powered Fiero.

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    Default L47/Aurora 4.0L powered Fiero.

    ...and an F23 5-speed Getrag triple-layshaft trans from an 02 Cavy with the 3.94 final drive. I've been working on this one for a few years now.

    Here's the motor with exhaust. Just prior to me replacing all of the timing wearables.



    The motor ran great last summer; I just tore it down over the winter to finish those nit picky little details that make it worth not rushing to register a bullshit car in September. It didn't have brakes, shifter cables, a busted CV...shit like that.

    I bought most of the parts to get it back together.

    Front mount battery shit:



    Even has cruise control:



    I finished the audio system tonight. Composed of 'custom' digital coaxial source into Fiio DAC directly into NVX JAD900.5 amplifier in 2-channel mode. It runs two CDT ES-04 4" woofers and two 1" Aura tweeters plus one 8" ProTech sub in .35in^2 sealed enclosed packed with PolyFill. Sounds amazing. Really that close to being done. Hoping early April.



    Even pulled the dash to get the sub and 5-channel amplifier mounted.



    Lest ye not believe it was ever in the car, here's an old pic; before the engine wiring harness was ever even constructed.



    I've got an OBX LSD coming in that I need to 'refurb' and install in the F23. Then fab up the shift cable mounts and bolt the motor in and fill the fluids. Almost there.
    Last edited by L47; 07-01-2017 at 12:07 PM.

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    Mr. G Q Array Onyx Z32's Avatar
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    ... but will it do burnouts?

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    Formerly Red00WS6 Array Wahoo's Avatar
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    Seems like a cool project

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    GIMME DA COOKIES Array JayS's Avatar
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    Starting with a fastback not a notchie... So that gets a

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    Lifetime User Array 1QIKZ's Avatar
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    "My Z is a hybrid vehicle....it runs on gasoline and money."

    1994 300ZXTT, 2003 Mustang GTTT
    The only thing better than a twin turbo car is two twin turbo cars.


  6. #6

    Black Forest Motorsport


    www.BlackForestMotorsport.com


    4585 Genesee St.
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    LOL. Proper first post.

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    Lifetime User Array 91MR2's Avatar
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    Cool project, man...mid-engine cars rule...

    2012 Lotus Evora S GP, 1995 Lotus Esprit S4, 1991 Toyota MR2, 1987 Renault GTA

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    woah. a car project!

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    I'm even using a GM computer with a legit GM operating system. It's an LS1 PCM from a '98-'00 F-Body, but I can't remember the service number off the top of my head. It's flashed with the GM-written operating system from a '99 Shelby Series One and tuned with HPTuners. I just had to build the wiring harness, really.



    I still need to fab up some shifter cable mount(s), get some headlights in it and bolt the motor back in after I paint the valve covers. Hoping to have it legal around the end of the month or mid-April at the very latest.



    I've even got the regulator for the fuel rails I'm going to make. Just need to fire up the lathe to make some bungs and -AN fittings.



    Oh, and a few bonus shots from when I had the motor torn down:





    Last edited by L47; 07-01-2017 at 12:09 PM.

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    Lifetime User Array Norb O's Avatar
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    very cool. surprising how similar the intake mani looks to an LS. maybe this was a precursor.

    how's the trans hold up to that power? what does it even make for power? She's gonna rip with a 3.94...
    - 2001 560i LSx SOLD
    - 2000 FRC

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    I guess all of my posts need to be approved? That many trolls around here?

    Anyway, here's a youtube video of the motor running in the car last summer. I shot it with my OnePlus 1 cell phone, which has an awful mic. Gives you an idea though. The intake is really that loud. Exhaust sounds pretty good with just the resonator. Loud, but good.



    The SpeedHut gauges I installed:



    Transmission mount porn (or so I think):



    I do keep forgetting to gusset those strut tower brace struts. I need to write that down on the whiteboard. Don't let me forget.

    I had the car somewhat back together last summer when it was working, and here's what that looked like:







    One more, of my bomb-ass re-upholstered leather seats with factory emblems stitched back on. No slots for harnesses, though. Sad face.



    Shittier picture, but I had an HTC One Mini when I took this last year. That thing was awful with pictures. Purple. Everything was GD purple. What the hell?

    Anyway; I'll keep working on it.

    Oh, and to answer a few questions:

    These F23 boxes have been in 500hp+ L67 (3800SC) powered Fieros on Pennock's in the past handling 6K+ clump dumps and nonsense. Even if I do manage to break it, they're rather plentiful and have been around for the last 10 years or so in various cars with different bellhousings. The only differences were related to shifter cable mounting and final drive ratio. I'll update when I pull the trans apart. I have all of the important Kent-Moore F23 specific tools:



    ...and the motor was rated for ~300/300 or something like that in the Shelby. My motor came from the Aurora and those were rated for ~250/250, so I wonder the Shelby just has a 50HP tune? I mean, my intake is as as least restrictive as it can be and my exhaust is pretty free-flowing. I'll likely have a dyno session with it this summer.

    Thanks for the interest, ladies and gents.
    Last edited by L47; 07-01-2017 at 12:27 PM.

  12. #12

    Swiderski Motorcar


    www.JSMotorcar.com/


    7078 Transit Rd
    Williamsville, NY 14221
    (716) 694-7777
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    Why not use the 4.6L? Just wondering. Cool build though.

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    Lifetime User Array ubengineering's Avatar
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    Cool build for sure. Looks like the engine fits well in there, surprisingly.
    15 Focus SE - 01 S10 4.3L - 96 Viper GTS - 95 Neon R/T

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    L47 is similar to the cadillac northstar v8s.

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    Double Wrapped. Cause, you know, well its GM Array ultradriver10000's Avatar
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    awesome !!

    Wife = "Honey please don't drift this corner, we have soup in the car."
    1997 Corvette 418| LSX E36 M3 | 2013 Ram Cummins | 1997 Viper | 3800SC Cavy

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    Very cool.

    Dan

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    GIMME DA COOKIES Array JayS's Avatar
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    I wonder if this Fiero project every got completed?
    http://www.nyspeed.com/showthread.ph...-powered-Fiero

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    I hope it doesn't think I'm spamming by trying to update this thread, but I've been working on this car for the last five years already, so there's been a bunch of progress. Good amount of pictures. Here's some background on the 'radio'.

    Well; it's not a radio. It's actually an empeg. It's an MP3 player, and it doesn't even have a built-in FM tuner. There's a plug-in add-on module that used to be available, though. It's a defunct product produced by a small UK firm in 1999-2000 for a high initial MSRP of around $1,300 for a single ~20GB[all of t3h geebeez] IBM hard drive. It's a tiny, low-powered Linux computer with a single available IDE bus for storage [master and slave, of course] and a beautiful VFD display up front. Less than 2,000 were produced. I loved mine so much, I bought another. Then it died, so I swapped to the spare. I can't resurrect the old one. Two of the parallel address busses are hosed from the StrongArm processor, so it couldn't find the ethernet controller or hard drive. I just don't think I'll ever find a replacement chip. It's strictly a parts machine, for sure. I was devastated. These aren't easy to find or really all that cheap. I hunted another down in Germany, though. Hopefully be here soon.



    The yellow Pelican case background is it's home when it leaves the car. I wrapped paracord super tightly around the handle and lashed in a carabiner so that I can clip it to my backpack when I have to hike anywhere from my car. I use it daily in my Subaru and I very rarely leave it in the car. It slides in and out of a cage so that it can very easily be taken inside to be updated. I'll get an orange Pelican for the new joint once I get it up to 'hot spare' spec.



    For the mega-nerds; it's so old that I have to run a patch kernel ~[2.2.9] to feature LBA48 support to address my twin 160GB drives. Yup. That's 320GB of 2.5" 44-pin IDE storage in my dash. Mostly random VBR, 320CBR. I think it supports FLAC, too.



    I mentioned in the first post the digital sound card. I hand-assembled that little board and spidered in the harness. It's basically an i2s sound card that spits out a standard S/PDIF signal over digital coaxial. I borrowed the two rear RCA outputs from the car's sled harness for digital audio purposes, so I don't have to worry about any extra cables. I just have to run a little DAC at the amp to get the signal back to analog. Zero noise in the Subaru. I'm expecting the same of the Fiero.



    Answer questions:

    I didn't use the 4.6L because it wasn't reasonably available to me. I got this 4.0L somewhere around 7 years ago and I didn't have much money at the time. I think I paid $300 for it? Similar N*s were $1,000+. Nothing against them whatsoever. The '96-'99 blocks are identical, save for bore size. Every single thing that I've made for this motor would bolt right up to the 4.6L N* big brother. In fact, I'll likely use one when I build up a stout shortblock and put steel inserts/studs in the block for the heads and mains. Anybody notice the turbo flange up in the first few posts there?

    Engine does fit pretty well, but that's no accident. Had to do come creative packaging and chassis clearancing, aka beating the piss out of some places with a BFH. Here are a few more packaging-type photos to give you an idea.

    Coolant hoses mounted through oil intercooler to get to the rocker panels for tubes for front mounted radiator.



    Strut tower clearance and valve cover -12AN black braided nylon breather lines. These go back to that rad-ass fire extinguisher. Yea, I made that into my catch can.





    The closer valve cover fitting is kind of close to the brace [1/8"], but I'm still working on the PITA valve covers [magnesium] so I think I can try to move it up at least 1/4"-1/2". I'm sanding the pits and oxidation out and trying to make them somewhat presentable so I can paint them wrinkly red. Kinda Ferrari-y. Hope it's not too douchey. Also gives you a better view of the clearance. It's probably around 1/4"; but the [minimal] movement of the poly-mounted drivetrain is in a fore-aft direction, not lateral. Should be sufficient. Again; gussets.

    Forgive me, I didn't scrub the front crossmember before installing the tubular front suspension with coil-overs, but it's got them. Along with front/rear Addco sway bars.



    Rear sway bar:



    That lame Eibach sticker is gone.

    Answers a bunch for now, anyway.
    Last edited by L47; 07-01-2017 at 12:29 PM.

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    Mr. G Q Array Onyx Z32's Avatar
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    Yep, spam filter thought you were trying to sell us Viagara. You should be set now

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    Quote Originally Posted by Onyx Z32 View Post
    Yep, spam filter thought you were trying to sell us Viagara. You should be set now
    Hah. My fault. Thanks for clearing it up!

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    Started working on the shifter cables. Apparently there are good cables available from California Push-Pull that will just drop into place if I make a custom bracket and bolt it to the transmission. Great. Too bad I've got several problems with this. I e-mailed Californai Push-Pull; no answer. Fair enough. I called them, at around 2:30P Pacific time (they're in California, you see), and was greeted by some woman informing me that all questions about cables had to be directed to Dave, and Dave had left for the day. They close at 5P PST. Wonderful. I left a message with the woman regarding my inquiry including my cell phone number. No call back. I can't deal with that kind of customer disservice. I was willing to drop ~$250 on cables with him, but instead I ended up with some universal 1/4"-28 threaded end cables from a company called Steinjager. Cost me $100 for the both and it gave me something else to 'engineer'. Plus, they're beefy as hell. Sturdy cables. Even included those 1/4" heims up front and 1/4" ball joints at the transmission. Not bad. I found them via rock crawling forums. Dudes use them for custom manual transfer case shifting setups. If it's good enough for them, should work for me, eh?





    Anyway, the bulkhead locations seem to be pretty spot on but I'm still going to wait to finish weld and gusset until I have cable ends that fit my shifter assembly or make new dowel pins on the lathe to weld into the shifter assembly that actually fit those heims. Six one, half dozen the other. I've got to make everything at the trans too, but I've got a few ideas. The shift assembly is stone simple. I'll likely just make one from scratch to suit my needs. After all, the cables are coming into the transmission from the complete opposite side in my car than when it was in the Cavvy. Need to get creative.

    Here's an example of an M-Tech 'short shifter' on a European F23. Mine would be a bit different to accommodate the different cable entrance location/angle, and I'd have to make the arm for the select cable [lower cable to the right] a mirror image of the one here. This is due to the direction the select cable moves when the shifter operates in the factory F23 cars; opposite that of my factory Fiero 5-speed shifter.

    Last edited by L47; 07-01-2017 at 12:30 PM.

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    Lifetime User Array BDR5oh's Avatar
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    where you aware that the L47 was originally designed for indy cars

    i remember seeing a few videos years ago of them testing a few cars with them ...... the noise those things make at 8000 is soo sweet
    h8srats

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    Quote Originally Posted by BDR5oh View Post
    where you aware that the L47 was originally designed for indy cars

    i remember seeing a few videos years ago of them testing a few cars with them ...... the noise those things make at 8000 is soo sweet
    Yea, GM's indy program used a highly modified version of this motor. Unfortunately it doesn't share many parts with the production motor, but it's still cool. If I replace the springs, retainers and rods in this motor, I can bump the redline up from 6.5K to about 8.5K. ...and that's nice.

    Anyway; I painted the valve/cam covers today. Turned out okay. Kinda meh, but I'm not going to fuck with them anymore. I'll be remaking them when I get a TIG machine anyhow, as well as the intake and oil pan.



    I split the case on the F23 today. Really, it was pretty easy. Just had to stop at Harbor Freight and get a set of 3/8" drive allen keys to get the one bolt out of the intermediate shaft:



    I also got that differential. Everybody on the internet is absolutely correct; it's acceptably made, but poorly assembled. The diff is constructed of solid castings with decent machine work on gears, reliefs and splines. The Belleville (spring) washers in between the axle gears are garbage and must be replaced with good washers stacked properly, which the originals were not. There are 9 M8-12.9 bolts holding the two halves of the diff together, and 7 of them were just about to fall out. I'll need to slather them in red LocTite when I torque them back down. First, I need to spend an hour or so with the dremel cleaning up some of the not-so-great machine work and then I can put it back together.

    Last edited by L47; 07-01-2017 at 12:31 PM.

  24. #24
    Double Wrapped. Cause, you know, well its GM Array ultradriver10000's Avatar
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    This is so much awesome

    Wife = "Honey please don't drift this corner, we have soup in the car."
    1997 Corvette 418| LSX E36 M3 | 2013 Ram Cummins | 1997 Viper | 3800SC Cavy

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    Lifetime User Array BDR5oh's Avatar
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    i also have a good friend of mine that has an LS6 with a getrag in his fiero .... and that trans is going strong
    h8srats

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