Please email your LT4 dyno submissions to info@grandsportregistry.com. Be sure to include a short description of the car including it's major modifications, make of dyno machine, dyno facility name, date of dyno test, plus a digital scan or image of your dyno graph, if one is available.

Of course we trust you... but no bragging rights without the dyno graph!

Keep in mind the numbers shown here reflect REAR WHEEL horsepower and torque, as reported by various dyno facilities. While factors such as environmental conditions, dyno manufacturer, and technician expertise (or lack thereof) can vary results considerably, a general rule of thumb is to divide these numbers by 0.85 to approximate horsepower and torque at the flywheel. This allows for a commonly accepted 15% parasitic loss from the drivetrain. For example, a car which dynos at 330 HP at the rear wheels (RWHP) is probably making close to 388 HP at the flywheel. Big difference!

Click on the icon for a dyno graph, if one is available

GS#	RWHP	RWTQ	GRAPH	OWNER	FACILITY/DATE	MODIFICATIONS
#633	320	331		John "Hutch" Hutchinson	Dynojet - Vinci Hi-Performance, Orlando, FL (Feb 2000)	Hooker shorty headers, PowerEffects exhaust, K&N, 52mm throttle body
#633	334	329		John "Hutch" Hutchinson	Dynojet - Vinci Hi-Performance, Orlando, FL (Feb 2001)	As above plus CNC LT4 Heads, CNC LT4 intake, 210/224 Comp Cam, Ed Wright PCM, 4.10 gears, BPP Vortex air intake and random tech catalytic converters
#633	349	324		John "Hutch" Hutchinson	Dynojet - Vinci Hi-Performance, Orlando, FL (Apr 2001)	As above but with Crane 222/230 cam and new plug wires (Picked up 15+ HP with the new cam but an odd dip at 5600 RPM)
#633	364	349		John "Hutch" Hutchinson	Dynojet - Norris Motorsports, Ocoee, FL (Nov 2001)	As above but with Crane 222/230 cam, new Taylor plug wires, 30# injectors, full length TPIS headers, and Random Tech bullet cats. Dip in power ~5700 RPM was caused by a valve adjustment problem (springs were way too loose, causing the start of valve float at upper RPMs. Never redynoed after fix.)
#633	397	375	n/a	John "Hutch" Hutchinson	Dynojet - Norris Motorsports, Altamonte Springs, FL (May 2005)	Initial quick-n-dirty tune following bore & stroke to 396 ci. Many new mods including forged crank, rods, pistons, Comp 306 cam, 58mm TB, Granatelli MAF, Meziere HD elec water pump, freshened CNC heads, port matched intake, aluminum flywheel, stage 2 clutch, MSD 6AL, Random Tech (ceramic) bullet cats, Jim Smith Dyno Tune.
#633	409	398		John "Hutch" Hutchinson	Dynojet - Corvette Masters, Maitland, FL (Apr 2006)	As above but bullet cats replaced with straight pipes with Powereffects exhaust OPEN and Jeremy Formato dyno tune. Note: Max power with Powereffects CLOSED was 386 RWHP. Max RWHP achieved was 419 but backed off for drivability.
#633	402	404		John "Hutch" Hutchinson	Dynojet - Next Level Performance, Altamonte Springs, FL (Apr 2009)	As above, Powereffects open, dyno tune by Jim Smith. Swapped back to smaller Crane 222/230 cam for improved drivability.
#470	326	306		Todd Emanuel	Woodbridge Dynotech (Apr 2000)	Stock but for GM Hot Cam
#470	344	334		Todd Emanuel	Dynojet - John Haley Motorsports (Jun 2002)	Hot Cam, TPIS longtubes, no cats, Corsa, AFPR, K&N/open lid, 52mm BBK TB
#470	362	346		Todd Emanuel	Doug Rippie Motorsports (Jul 2003)	Hot Cam, TPIS longtubes, no cats, Corsa, AFPR, K&N/open lid, 52mm BBK TB, dyno tuning by Doug Rippie
#621	304	308		Robin Dickinson	Dynojet - Tune Tech Auto Diagnostics	Flowmaster exhaust, K&N, no cats
#977	353	n/a	n/a	Mike Woods	n/a	BBK 52mm throttle body, adj fuel pressure regulator, X pipe in stock exhaust (big difference, picked up 15 RWHP), tuning by Ed Wright
#007	300	301	n/a	Jim Mason	Dynojet - Dynotech Motorsports	Stock LT4
#007	331	331		Jim Mason	Dynojet - Dynotech Motorsports	Open Air Filter Lid + K&N filter, 52mm throttle body, Flowmaster cat-back exhaust, Hooker Ceramic Coated Shorty Headers, Mild Porting of the Intake manifold (made 300 RWHP - 301 TQ stock).
#967	309	323	n/a	Rolla Dunkin	Mustang Dyno - Breathless Performance (Oct 2000)	Open air filter lid, K&N filter and mild intake porting
#267	317	n/a	n/a	Randy Randall	n/a	Corsa cat-back exhaust
#749	302	n/a	n/a	Ralph Giro	Dynojet - Tune Tech Auto Diagnostics	52mm TB, K&N Filter, Hypertech Power Programmer
#074	355	n/a	n/a	Jack Worley	n/a	Hot Cam and shorty headers
#682	305	313		Scott Gasiorek	Dynojet - Tune Tech Auto Diagnostics (Aug 2001)	BB Tri Flow & Ceramic Shorties, Forced Air, Mod. Mass Air Sensor, 52 MM TB, >Airfoil, Fuel Pressure Regulator, etc
#951	308	308	n/a	Brad Stephenson	n/a	Stock except for Corsa catback and K&N filter (K&N pulled for last run)
LT4	322	317		Tony Mezger	Dynojet - Speedworks, Lewisville, TX (Jul 2001)	Stage I ported heads and intake, K & N air filter, throttle body by-pass
#340	354	352		Robert Velasco	Dynojet - Springfield Motorsport (May 2002)	Shorty headers and stock GM cats (long tubes and no cats pulled 357 RWHP - 342 TQ)
#340	407	386		Robert Velasco	Dynojet - Woodbridge Dynotech (Jun 2005)	SDPC 383 short block, LPE/SDPC Stage III heads, GM 847 cam, LPE LT4 manifold, ASM 58 TB, 1000 CFM MAF, cold air box, EM long tubes, 3 inch Magnaflow cats, 3 inch pipes, 3 inch Power effects mufflers. Picked up 14 rwhp going from 2.5 to 3 inch exhaust
#340	441	416		Robert Velasco	Dynojet Research (Jan 2007)	Engine: 383, GM847 cam, LPE LT4 CNCed heads, LPE LT4 ported intake, ASM 58mm TB, Long tube headers, 3" exhaust with x-pipe
LT4	304	307		George Sommer	Dynojet - Performance Technical Center, Elk Grove, IL	Corsa exhaust, SLP triple tree air cleaner, 160 stat, Hypertech program, 4.09 Gears
LT4	342	338		George Sommer	Dynojet - Finish Line Performance (Jul 2002)	As above plus Hot Cam, Hooker 2149 longtube Headers, 52mm BBK throttle body, Magnecore wires, NGK plugs, severe duty timing chain and custom programmed PCM
LT4	306	314		John Bolanowski	Dynojet - (Jul 2002)	Stock except for no mufflers, K&N air filter, 160 thermostat
LT4	300	306	n/a	Bob Eshleman	Dynojet	Stock in 85 degree air
LT4	322	324	n/a	Bob Eshleman	Dynojet	Dynoed after addition of Power Effects exhaust in 72 degree air. 96 LT4 with 75,000 miles
#891	447	467		Brian Yates	Dynojet - Auto Assets (Nov 2003)	396 stroker, ATI P1SC w/10lbs, intercooler, 58mm TB, port matched heads w/2.02 and 1.60 valves, 42lb. injectors, MSD 6AL, Crane 222/230 cam w/.542 and .563 lift, 9 to 1 JE/SRP pistons, Callies crank, Eagle rods, McLeod dual disc clutch w/aluminum flywheel, 1 3/4" long tube coated headers, flowmaster exhaust, dyno tuning with Norris Motorsports, Ocoee, FL
#891	504	516		Brian Yates	Dynojet - Back Street Performance (Aug 2004)	Same mods as above but with new D1SC supercharger with a Reichard Racing Ultra Grip pulley
LT1/4	306	324		Alton "Tuna" Dobbins	Mustang Dyno - HP Racing Equipment, OKC, OK (Nov 2003)	92 LT1 with fresh rings & bearings, LT4 Heads, LT4 Intake, LT4 Hot Cam, 1.6 roller rockers, Ed Wright (FastChips.com) chip, 160 stat, stock exhaust, stock induction w/ K&N filter. 103,700 miles on the rest of the car.
LT1/4	328	348		Alton "Tuna" Dobbins	Mustang Dyno - HP Racing Equipment, OKC, OK (Feb 2004)	Same as above except for Corsa cat back exhaust and a couple thousand miles on the motor, 105,400 miles on the rest of the car.
#344	311	300	n/a	Nathan Biesemeier	Dynojet - (Nov 2003)	Stock except LT4 Hotcam.
LT4	311	325		Evan Grimmett	Tulsa Dyno & Performance, OK (Feb 2004)	Bone stock but with ECM tuning. Made 300 RWHP, 317 TQ before tuning.
#468	379	345		Cary Rosenthal	Dynojet - FordSpeed.com (Mar 2004)	4.10 Viper Gears, K&N Filter& Open Lid, TB Bypass, Stock TB bored to 52mm, Meziere Electric Water Pump, Exotic Muscle Long Tube Headers, No Cats, Corsa Cat Back Exhaust, Holley Adjustible Fuel Pressure Regulator, GM Hot Cam, Extreme Duty Timing Chain, Ported Heads, Matched Intake, Impala SS Head Gasket, Crane Gold 1.6 Roller Rockers, 160 degree stat
#387	463	472		Aaron Hancock	DynoJet - More Performance, Charlotte, NC (Mar 2004)	396 stroker + ATI Procharger @ 6lbs boost. Hooker shorty headers, gutted stock cats, Borla exhaust w/o resonator. More HP expected with the upcoming addition of long tube headers.
LT4	308	317		Francois Boone	DynoJet - D&D Speed Shop - Altendorf, Switzerland (Sep 2003)	The car was bone stock with a paper air filter and had 29,740 miles. Upcoming mods: Hot cam, 52mm TB, Vortex ram air, Flowmaster cat back, 160° stat, LT1-edit reprogramming by myself.
#086	323	336		Chris Halliday	DynoJet - Vinci Hi-Performance, Orlando, FL	Stock but for Corsa cat-back exhaust (made 309 RWHP - 320 TQ stock).
LT4	365	380		Akan Askim	Dynojet - DPE Racing Engines (Aug 2002)	383 stroker, ported heads, 4340 forged crank, Lingenfelter throttle body, Borla exhaust.
#671	283	308		Kevin Gill	DynaPack - New Zealand (May 2006)	Stock but for K&N filter.
#738	302	305		Steve Thompson	Dynojet - AMP Performance, Phoenix, AZ (http://www.ampperformance.com) (Jun 2006)	Hooker Ceramic-coated Shorty Headers, K&N, mild porting of the heads. Ambient temp during run was 91 degrees F.
LT4	304	305		Chris Jones	DynoJet - Carolina Auto Masters (Jul 2006)	1996 Corvette LT4, Magnaflow catback, Descreened MAF, Throttle body coolant bypass, 4.10 gears, K&N and open air lid.
LT4	326	327		Chris Jones	DynoJet - Carolina Auto Masters (Jan 2007)	1996 Corvette LT4, as above with addition of Exotic Muscle Long tube headers, Random Tech high flow cats, Meziere electric water pump, Dyno tune.
LT4	348	336		Chris Jones	DynoJet - Carolina Auto Masters (Aug 2007)	1996 Corvette LT4, Same mods as before except for the addition of a LT4 Hotcam. This dyno graph has the before cam and after cam pulls for comparison.
LT4	311	309	n/a	Larry Fry	Dynojet - The Dyno Shop, El Cajon, CA (Sep 2006)	Hooker Aerochamber Mufflers, 60K miles on LT4 coupe, untuned.
LT4	340	341		Larry Crivello	Mustang Dyno - Performance Motorsport, St James, NY (Mar 2008)	1996 C/E LT4, 4.10 gears, Triflow 3” exhaust, Exotic Muscle long tubes, Vortex cold air, Granitelli mass air, high pressure fuel reg, alum. Flywheel, Jet stage 2 Pwr Module
LT4	407	396		Dan Linger	Dynojet - G-Force Motorsports, Houston, TX (Mar 2007)	Procharger, K&N Filters, forced air induction, Hooker shorty headers, dyno tech. high flow cats, B&B Tri Flo exhaust, 42# injectors
#039	281	295		Tim Bellomy	Mustang Dynamometer, SW Tuning, Oklahoma City, OK (Jan 2008)	Completely stock LT4 with Power Effects Exhaust
LT4	398	424		Mark Bass	Dynojet - MTI Racing, Marietta, GA (Oct 2008)	1994 Corvette, LT1 to LT4 kit with GM Hot Cam, 58mm TB, Hooker shorty headers, 30lb fuel injectors, Nitrous. Run #1 naturally aspirated (303HP, 307TQ). Run #2 with 125HP NOS shot.

Email your LT4 dyno submissions to info@grandsportregistry.com