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05-22-2017, 03:49 PM #1Long Live the Opti
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- Offline
- Join Date
- Sep 2008
- Name
- Sean
- Vehicle
- 1999 Twin Turbo Corvette
- Location
- Fort Wayne, IN
- Posts
- 12,072
Making some changes to my Twin Turbo C5
For those not familiar -- 800+ RWHP/TQ as it sat in this pic early last year:
Parked it early last fall and started tearing down. Was dropping oil pressure on throttle shut, then recovering with a blip on the throttle. Classic oil pump check valve symptom. Work slowed down, 2nd half last year was a debacle. Spent first half this year trying to recover savings and such.
So....upgrades coming: AFR 230V2 heads for boost with 8019 springs and Inconel exhaust valve upgrade. Melling 10296 pump (using blue lower pressure spring). Custom cam (222/232 range, .625 range, 115+4 range). Removes FAST 102 and NW 102 TB due to leak issues, going to LS2 Intake and TB.
As long as the fuel system will support it, hoping to see 1K+ RWHP this fall. NOT going to chase it though. I like the 97-98 return style fuel rails because it's wonderfully functional and keeps that stock look. So fuel system will be the limiting factor. Made 761/760 a few years ago with smaller heads, smaller cam, smaller turbo's, smaller injectors, with a bunch of overhead room in the fuel system still.
Car is currently stripped of rad/condenser, front accessories and rack, and is waiting for me to get off my duff and pull the valvetrain/heads/cam out.
More to come.
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05-22-2017, 08:33 PM #2Xtreme Member
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- Offline
- Join Date
- Nov 2012
- Name
- Shaun
- Vehicle
- 1994 Formula
- Location
- Phillipsburg NJ
- Posts
- 7,266
Supporting Member2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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05-22-2017, 08:47 PM #3Lurker
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- Offline
- Join Date
- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
NICE, just really make me realize how far behind in life I really am..... lol
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05-23-2017, 06:37 AM #4Long Live the Opti
- Status
- Offline
- Join Date
- Sep 2008
- Name
- Sean
- Vehicle
- 1999 Twin Turbo Corvette
- Location
- Fort Wayne, IN
- Posts
- 12,072
Trust me when I say don't look at it like that, it serves nothing. Just keep looking forward. FWIW, I had a pretty serious fall from grace a few years ago when I originally owned the car above. Lost pretty much everything. Took a few years, some VERY rough, but got stable, back on my feet, and bought the car back in 2015 after selling it in 2010 before it all came crumbling down. I say this because at my low point, I had zero hope of achieving anything, and then it all just came back as I plodded along. Just keep grinding and thing have a way of coming together.
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05-23-2017, 06:45 AM #5Lurker
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- Offline
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- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
Thanks man, Ive been pretty stable the last 2.5 years and atleast I got me a firebird back now! If I just hold on to it im sure in 5 or so years it will be bad ass.
But seriously that car is KILLER! love that color and the c5 is my personal favorite body style.
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05-23-2017, 11:08 AM #6Long Live the Opti
- Status
- Offline
- Join Date
- Sep 2008
- Name
- Sean
- Vehicle
- 1999 Twin Turbo Corvette
- Location
- Fort Wayne, IN
- Posts
- 12,072
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05-26-2017, 10:52 AM #7LTX Master
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- Offline
- Join Date
- Nov 2013
- Name
- Corey
- Vehicle
- 94 Camaro z28
- Location
- new hampshire
- Posts
- 575
looks good! you'll have to challenge kyle at 1320 video to race his "unicorn" twin turbo c5 haha
94 Z28 M6, 383 LT1, McLeod Twin Disk, MGW, SLP CAI, Pacesetter LTs w/ORY, E-cut out, Spintech 2OTL, Strano sways, BMR suspension, Viking coilovers, Solomon tuned
96 Chevy K1500, 5.7L Vortec, 4l60e, 14 bolt, Volant CAI, Pacesetter LTs, Spintech 6000, b&m, 33s- DD
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05-26-2017, 11:41 AM #8Long Live the Opti
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- Offline
- Join Date
- Sep 2008
- Name
- Sean
- Vehicle
- 1999 Twin Turbo Corvette
- Location
- Fort Wayne, IN
- Posts
- 12,072
I haven't been following that build, but he'll probably have me covered based on some of the talk I'm seeing. Not to mention I refuse to compromise the street quality of the car.
I just took a look, can't find any specifics anywhere other than running through vids which I have no interest in doing. He's got marginally more turbo than me, but less cubes. Heads/valvetrain is unknown to me for Unicorn currently.
But he also is using wilwood rear brakes, allowing a small wheel/big tire combo to be used out back. Right there he'd get me because I'm stuck on 17" min but nothing is made with the right offset for a C5 with C6Z brakes. I keep the 19" NT05R's on the car all the time.
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05-27-2017, 08:02 AM #9Pr0jekt Turb0?
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- Offline
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- Sep 2008
- Name
- Ryan
- Vehicle
- 1993 Camaro Z28
- Location
- Utica, NY + Jacksonville, FL
- Posts
- 3,605
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05-27-2017, 11:07 AM #10Long Live the Opti
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- Offline
- Join Date
- Sep 2008
- Name
- Sean
- Vehicle
- 1999 Twin Turbo Corvette
- Location
- Fort Wayne, IN
- Posts
- 12,072
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