SEMA 2007: 1,000 HP ProPane Chevelle by Mothers

Click image for live gallery from SEMA

It seems that a lot of companies are realizing that unless your horsepower claims are in the four-digit range, they barely get noticed anymore. With that in mind, the team at Mothers Polish cooked up a very special 1970 Chevelle SS hot rod with 1,000 HP under the hood. And it happens to be powered by propane gas, hence the "ProPane" name. Jim Holloway from Mothers came up with the concept, Chip Foose did the design, Johnny Omundson of Obrothers Design handled the engineering, Haigh Blocks & PPI (Propane Performance Industries) were responsible for that 527 ci Chevy small block, and Paul Gonzalez of PGCC did the build. The result is one of the cleanest and cleanest burning resto-mods we've seen.

Follow the jump for the press release and build sheet.

[Source: Mothers]

PRESS RELEASE

Mothers' 1970 Chevelle "ProPane" to Debut
at SEMA Show 2007

The team from Mothers Polish has another cool ride to add to its already impressive fleet of hot rods, customs, race cars and big rigs. It's the ultimate symbol of Chevy muscle, a 1970 Chevelle SS. But this build is more than just your average overhaul - it's resto-modded with pro touring in mind, and produces over 1,000 clean-burning propane-fueled horsepower without the aid of boost or nitrous.

The concept of ProPane was developed by Jim Holloway of Mothers Polish, designed by Chip Foose, and brought to life at Paul Gonzalez Custom Cars, who managed the build. A talented team of expert fabricators, suppliers and other friends of the Mothers family were recruited from throughout the automotive aftermarket industry and worked tirelessly until its completion. ProPane sports a unique tube chassis by Obrothers Design, which mates to an innovative inboard pushrod coil-over suspension dampened by Penske 8300 racing shocks and sports one-off Foose Design wheels and Pirelli P Zero rubber.

Thinking forward as well as "green," the ProPane's groundbreaking power is provided by a large-displacement Haigh Blocks small block motor with Propane Performance Industries fuel delivery managed with with a Link ECU. Any way you look at it, the Mothers ProPane is unlike any other hi-po Chevelle. Previewed earlier in the year with a developmental engine, the completed ProPane makes its world debut at the only place that seems fitting - the SEMA Show 2007.

Mothers' Propane-Powered 1970 Chevelle
"ProPane" Specifications

CONCEPT - Jim Holloway, Mothers Polish
DESIGN - Chip Foose, Foose Design
BUILD LOCATION - Paul Gonzalez, PGCC
ENGINEERING & CHASSIS - Johnny Omundson, Obrothers Design
ENGINE DEVELOPMENT - Haigh Blocks & PPI (Propane Performance Industries)

ENGINE
ENGINE TYPE - Haigh Blocks Small Block Chevrolet
FUEL - Propane Powered
DISPLACEMENT 527.6 CID
BORE 4.320²
STROKE CRANKSHAFT 4.500² Custom Billet 1-off
BORE CENTER 4.500²
COMPRESSION 13.5:1
HORSEPOWER 1000+
TORQUE 800+
BLOCK - Haigh Blocks 10.250² Custom Tall Deck
SPREAD PAN RAIL BLOCK - Haigh Blocks
OIL SUMP/OIL TANK - Haigh Blocks
INTAKE - Haigh Blocks Custom Cross Ram Injection
CON RODS - Haigh Blocks 6.800² Billet
CAM DRIVE/VALVE SPRINGS - JESEL
VALVETRAIN/RETAINERS - JESEL
SHAFT ROCKER SYSTEM - JESEL
PISTONS - JE
CRANK - Custom Billet Stroker 1-off
CYLINDER HEAD - GMPP Splayed Valve
HEAD GASKETS - Custom one off by SCE Gaskets
CAMSHAFT - GS Products
VALVETRAIN - JESEL Custom 60mm Roller with Cam Belt Drive
HEADERS - Chris Bresnahan Tri-Step Tri-Y 1.87/2.0/2.5
UNDERCAR EXHAUST - Chris Bresnahan Custom Designed 4.0 Oval
CUSTOM RADIATOR COOLING - Be Cool, rated for 1200 HP
TRANSMISSION - G-Force T56 6-speed, custom rated to 1200 HP
FLYWHEEL - Centerforce Sintered Metal 6-Puck Single-Disc
CLUTCH - Centerforce Billet
INJECTION - Propane Performance Industries, Link & Prins
FUEL TANKS - Propane Performance Industries
FUEL SYSTEMS - Prins Alternative Fuel Systems
IGNITION - MSD Ignition Multi-coil
ECU - Link
LIGHTWEIGHT BATTERY - Braille
STARTER AND ALTERNATOR - MSD
OIL PUMP - Johnson's High Performance
DRY SUMP PUMP - Johnson's High Performance
LUBRICANTS - Pure Power Lubricants
OIL FILTER - Pure Power Lubricants

CHASSIS
CHASSIS - Obrothers Design
UPPER / LOWER CONTROL ARMS - Obrothers Design Custom Billet
INTEGRATED CAGE - PGCC
ROTORS & CALIPERS - Baer Brakes / Foose Multi-Puck Monoblocks
AIR OVER HYDRAULIC SYSTEM - Power Brake Service
SPRINGS - Eibach Springs
WHEELS - Custom 1-off by Foose Design
TIRES - Pirelli P Zero
SHOCKS - Penske Racing 8300 With Reservoir
STEERING SYSTEM - Flaming River Products
PLUMBING SUPPLIES - Goodridge
DIFFERENTIAL - Speedway Engineering
DRIVESHAFT - ACPT Carbon Fiber
MUFFLERS - Magnaflow Custom-Built 4.0² Oval

INTERIOR
INTERIOR DESIGN - Chip Foose, Foose Design
CUSTOM INTERIOR - Griffin Interiors
AUDIO - Audio Shoppe / ARC Audio Components
SEATS - Cobra
SAFETY HARNESS - Cobra
INTERIOR HIDES - Katzkin
DASH - Foose Design / Modified by Redline Gauges
GAUGES - Auto Meter Phantom Series/Red Line Gauges
STEERING WHEEL - Billet Specialties
DOOR LOCK KNOBS - Billet Specialties
DOOR HANDLES - Billet Specialties
SOUND DEADENING INSULATION - Dynamat
AC SYSTEM - Vintage Air
TRANSMISSION SHIFTER - Long Shifters
INTERIOR PAINT - Chris Guinn, Guinn Paint

EXTERIOR
PAINT DESIGN - Chip Foose, Foose Design
CUSTOM PAINT - Chris Guinn & Spade Bros.
BODY MODS - Chris Guinn
PAINT SUPPLIED BY BASF
ALL PROTECTIVE COATINGS - Specialized Coatings
EXTERIOR TRIM RESTORATION - Artistic Plating
CHROME PLATING - Artistic Plating
RESTORATION PRODUCTS - OPG & Goodmark
UPDATED WIPER MOTOR SYSTEM - Detroit Speed & Engineering
RESTORATION GLASS - JRD International