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01-13-2016
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#1 |
 Join Date: Jun 2015
Location: Texas
Posts: 530
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Corey does his magic
I picked up my 91 in March, it had Bola exhaust on it but was otherwise stock as far as I know. I removed the resonator and added an X pipe, then gave it to Corey H for headers and tune. Just got the dyno results 382 whp / 373 tq. Im impressed, I haven't driven the car yet but I can't wait to feel the difference.
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01-14-2016
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#2 |
 
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,394
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Re: Corey does his magic
That's about 450Hp at the crank. You'll feel that in the SOTP dyno! Tell him I said hello :-)
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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01-14-2016
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#3 |
Join Date: Mar 2004
Location: Found Member
Posts: 4,346
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Re: Corey does his magic
Now let Corey hog out the plenum & injector housing's for 400+ RWHP.
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Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237 |
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01-14-2016
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#4 |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Corey does his magic
Yeah, it shows ta go ya just how stifled these motors are. The second gen LT5 made 550 hp on the engine dyno, according to Graham Behan.
Oh...the lost opportunities and possibilities....
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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01-14-2016
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#5 |
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Join Date: Jun 2015
Location: Texas
Posts: 530
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Re: Corey does his magic
450 at the crank? I was thinking about 430, 12% drivetrain loss, but you guys have much more experience than me with these numbers.
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01-14-2016
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#6 | |
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Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 183
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Re: Corey does his magic
Quote:
Graham. |
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01-15-2016
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#7 | |
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Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Corey does his magic
Quote:
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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01-14-2016
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#8 |
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Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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Re: Corey does his magic
There was documented evidence of factory dyno testing that showed 440 crank hp on a brake dyno when the engine had headers and an optimized tune for the '90 engines if I recall correctly. So... mid 400's is a good estimate. Headers seem to wake these cars up.
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01-14-2016
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#9 |
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Join Date: Jun 2015
Location: Texas
Posts: 530
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Re: Corey does his magic
Cool, the Corey effect adds the extra 10 hp.
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01-14-2016
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#10 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: Corey does his magic
I have the utmost respect for Corey, but for a motor that starts out at ~ 335-345 rwhp stock, 40rwhp bump on headers and a tune sounds a bit high to me.
If it is there, it's outstanding work and Corey is the guy to do it.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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