Corey does his magic - ZR-1 Net Registry Forums

32valvesftw · 01-13-2016

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.

A26B · 01-14-2016

That's about 450Hp at the crank. You'll feel that in the SOTP dyno! Tell him I said hello :-)

FU · 01-14-2016

Now let Corey hog out the plenum & injector housing's for 400+ RWHP.

Paul Workman · 01-14-2016

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....

32valvesftw · 01-14-2016

450 at the crank? I was thinking about 430, 12% drivetrain loss, but you guys have much more experience than me with these numbers.

mike100 · 01-14-2016

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.

32valvesftw · 01-14-2016

Cool, the Corey effect adds the extra 10 hp.

XfireZ51 · 01-14-2016

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.

Billy Mild · 01-14-2016

Comparison to the Haibeck tunes?

Vette73 · 01-14-2016

Quote:

Originally Posted by Billy Mild

Comparison to the Haibeck tunes?

Yes I would like to see the comparisons also....I remember when I did headers,exhaust and installed Marc's chip (was mailed to me from Chicago) I live in NY- the car def did pick up power..

450 crank horsepower? Seems a little high to me also since I'm guessing the tune is the same.....Not too familiar with the tuning process when it comes to chips........Goid luck with car...

01-13-2016	#1
32valvesftw Join Date: Jun 2015 Location: Texas Posts: 530	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.

01-14-2016	#2
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	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 :-) __________________ 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.

01-14-2016	#3
FU Join Date: Mar 2004 Location: Found Member Posts: 4,346	Re: Corey does his magic Now let Corey hog out the plenum & injector housing's for 400+ RWHP. __________________ Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237

01-14-2016	#4
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	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....* __________________ 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

01-14-2016	#5
32valvesftw Join Date: Jun 2015 Location: Texas Posts: 530	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.

01-14-2016	#6
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	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.

01-14-2016	#7
32valvesftw Join Date: Jun 2015 Location: Texas Posts: 530	Re: Corey does his magic Cool, the Corey effect adds the extra 10 hp.

01-14-2016	#8
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,709	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. __________________ [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

01-14-2016	#9
Billy Mild Join Date: Aug 2014 Location: Kansas City, MO Posts: 838	Re: Corey does his magic Comparison to the Haibeck tunes? __________________ Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration