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92 Z28 Forged 346 TC78 Build While retaining A/C!

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Old 10-18-2012, 06:44 PM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

I'm running a 3" down pipe to a electronic cutout and a mufflex 4" exhaust. The 3" should be fine at my power level. When I upgrade I'll go bigger.
Old 10-19-2012, 12:04 AM
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Car: 86 IROC, 89 GTA
Engine: 350 blocks, both of em
Transmission: 700r4s
Axle/Gears: 10 bolt and 9 bolt, 3.73, 3.23
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

I already checked clearance on my car, a 4" pipe fits in there just fine as well. I'll be running mine nearly identical to yours.
Old 10-20-2012, 07:30 PM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

I was going to try to run something bigger but all of its already tight. And I figured the turbo is only a 3" exhaust. I did a little bit today. Mostly cleanup and paint getting ready to put rearend back in and my exhaust back on. Also got my HVAC back together. post some more pics later
Old 03-08-2013, 08:26 PM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

Little update... Sorry guys I work to much! I started on my fan bracket for my twin Derale Pushers. Made out of aluminum plate and bolted to the front side of the core support.
Attached Thumbnails 92 Z28 Forged 346 TC78 Build While retaining A/C!-stuff-004.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-stuff-046.jpg  
Old 03-08-2013, 08:33 PM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

Also started mock up and my intercooler pipes. Got my BOV tig welded on. Also I started mounting and wiring my 2002 Z28 Cruise control unit under the driverside front.
Attached Thumbnails 92 Z28 Forged 346 TC78 Build While retaining A/C!-stuff-044.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-car-035.jpg  
Old 06-14-2013, 02:59 PM
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Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

great build any updates on this?
Old 06-19-2013, 05:55 PM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

Thanks man! Theres been a few updates. Hard to work on the car being out of town all the time.

I've done a lot more wiring for my electric fans and fuel pumps. I'm running 10 gauge to them. Also got a bung welded in for my Typhoon IAT sensor in my intake piping, The rest of my piping has been completed. Figured out I cant run a wonder bar due to the fact my turbo shoots downward.. damn it. Trying to figure out my slip yoke with my 4l80e that had a bolt on one. I'm gonna bite the bullet and yank my trans and put in the right output shaft just so I can have more spline contact. Kinda weirded out on running a yoke with counterbore and only having 2" Of spline contact. I also got my steering shaft built from a chevy astro van. Give me a bit and Ill post some pics. Also got all my feedlines to my turbo made and installed my stainless flexable radiator hoses.
Old 02-09-2014, 09:56 AM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

Sorry guys, Hard to find the motivation to work on this due to work and family. But heres a update. Got all my intercooler pipes hooked up. Installed a power steering cooler. Got all my PS lines ran. Wiring wiring and more wiring!! Also decided to run methanol injection. I bought a small fuel cell to mount in my spare tire well. Had to build the bracket for that.
Attached Thumbnails 92 Z28 Forged 346 TC78 Build While retaining A/C!-591.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-585.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-586.jpg  
Old 02-09-2014, 10:09 AM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

Ok here's the bracket I built for my methanol tank. Wanted the pump to me mounted to tank.
Attached Thumbnails 92 Z28 Forged 346 TC78 Build While retaining A/C!-101.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-097.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-099.jpg  
Old 02-09-2014, 10:13 AM
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Car: 92 25th anv z28
Engine: 346 TC78 Turbo
Transmission: 4L80E
Axle/Gears: 3.25 9"Nodular, Strange axles
Re: 92 Z28 Forged 346 TC78 Build While retaining A/C!

Here's where I mounted my progressive methanol controller. Also how the cars been sitting. Working on mounting all my panels up.
Attached Thumbnails 92 Z28 Forged 346 TC78 Build While retaining A/C!-100.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-085.jpg   92 Z28 Forged 346 TC78 Build While retaining A/C!-087.jpg  
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