This Super Speedster is one of only three cars equipped with the turbocharged LT5, the same engine which powered the Callaway Sledgehammer Corvette to 254.76 mph.

Also known as the Series II, only two Speedsters came equipped with the turbocharged LT5, and this is the only one wearing the Paul Deutschman-designed AeroBody.

To accommodate the intercoolers, Callaway’s AeroBody was slightly modified with twin intakes which replaced the four seen on the earlier Speedsters. The bodies retained their wrap-around, low profile windows and sleek look which was unburdened by aerodynamic devices.

Unlike the earlier Series 1 speedsters, the Super Speedster is based on the Corvette ZR1 and a 750 bhp twin turbo LT5. This uses new engine management, fuel injection, exhaust, headers and catalytic converters to achieve over 750 bhp.

This Super Speedster was painted in Cherry Smash with My Favorite Blue leather interior. At the time of writing is completely original with only 13,174 on the odometer.

Story by Mecum Auction, Inc.

In Detail

type	One Of
built at	Old Lyme, Connecticut, USA
body stylist	Paul Deutschman
production	1
engine	SuperNatural LT5 V8
position	Front, Longitudinal
aspiration	Twin Turbos
valvetrain	OHV 2 Valves per Cyl
fuel feed	Mulitpoint Fuel Injection
displacement	5735 cc / 350 in³
bore	101.6 mm / 4.00 in
stroke	88.4 mm / 3.48 in
compression	8.45:1
power	559.3 kw / 750 bhp
specific output	130.78 bhp per litre
bhp/weight	468.75 bhp per tonne
body / frame	Composite Boby Panels over Steel Frame
driven wheels	RWD w/Limited Slip
wheel type	OZ Racing Alloy
front tires	P345/35ZR-18 Bridgestone Expedia
rear tires	P345/35ZR-18 Bridgestone Expedia
front brakes	Drilled Vented Discs Brembo Indy Billet
rear brakes	Drilled Vented Discs Brembo Indy Billet
front wheels	F 45.7 x 25.4 cm / 18 x 10 in
rear wheels	R 45.7 x 34.3 cm / 18 x 13.5 in
steering	Rack & Pinion w/Power Assist
f suspension	Unequal A-Arms w/Transverse Leaf Springs, Dampers, Anti-Roll Bar
r suspension	Upper & Lower Trailing Arms w/Transverse Leaf Srpings, Dampers, Anti-Roll Bar
curb weight	1600 kg / 3527 lbs
wheelbase	2443 mm / 96.2 in
front track	1514 mm / 59.6 in
rear track	1534 mm / 60.4 in
length	4480 mm / 179.8 in
width	1803 mm / 71 in
height	1041 mm / 41 in
transmission	ZF 6-Speed Manual
gear ratios	2.68:1, 1.30:1, 1.00:1, 0.75:1, 0.50:1

Auction Sales History

1990 Callaway Super Speedster Series II – did not sell for $185,000 1 of 12 Speedsters produced. 1 of 3 Callaway Twin Turbo LT5 engines. Built using a 1990 ZR1. The first of only 2 series II Super Speedsters. Cherry Smash paint with My Favorite. Blue interior make this a truly unique vehicle and the only one without LM body work. 13,174 actual miles.
Auction Source: Kissimmee 2014, #WhereTheCarsAre by Mecum