*89x2*
Well-known member
1987:The Callaway Twin-Turbo engine package introduced in 1987 was not a factory-installed option, but could be ordered through participating Chevrolet dealers as RPO B2K. Fully assembled Corvettes were shipped from the Bowling Green Corvette plant to Callaway Engineering in Old Lyme, Connecticut, for engine and other modifications. The 1987 Callaway had ratings of 345hp and 465 Ib.-ft torque, and reached a top speed of 177 9 mph with .60 overdrive gearing. The first four 1987 Callaways used replacement LF5 (truck) shortblocks, but subsequent cars had reworked production Corvette engines. All 1987 Callaways had manual transmissions and none were certified for California sale. Of 184 twin-turbos built In 1987, 121 were coupes, 63 were convertibles (188 1987's were actually constructed per records )
1988:Ratings for the 1988 RPO B2K Callaway Twin Turbo were 382hp and 562 Ib.-ft torque. Automatic transmissions (reworked truck Turbo Hydra-Matic 400s with external od unit) were available for $4,500. Either Z51 or Z52 suspensions could be specified. Later production with Z52 had Z51's larger front brakes mufflers, longer air dams, and steering coolers because RPO B2K triggered these through Special Equipment Option (SEO) Z5G. Engines were reworked by Callaway at its Old Lyme, Connecticut shop.
For Callaway twin-turbo Chevrolet engine coding was replaced as follows: First two digits for year, next three digits for Callaway sequence last four digits to match last tour digits of vehicle identification number.
1989: Same as above - ZF6 spd replaces the 4+3 Doug Nash od transmission.
1990:hp is now 390. For Callaway twin-turbo, Chevrolet engine coding was replaced as follows: First two digits for year, next three digits for Callaway sequence, last four digits to match last four digits of vehicle identification number.
1991: hp upped to 403. Callaway Twin-Turbo conversions ended with the 1991 model year. Callaway built the 500th twin-turbo on 9-26-91 and subsequent builds were specially badged and optioned (extra $600) as "Callaway 500."
(as few as 8 series 500's were built)
1992 + Supernatural series is born
1988:Ratings for the 1988 RPO B2K Callaway Twin Turbo were 382hp and 562 Ib.-ft torque. Automatic transmissions (reworked truck Turbo Hydra-Matic 400s with external od unit) were available for $4,500. Either Z51 or Z52 suspensions could be specified. Later production with Z52 had Z51's larger front brakes mufflers, longer air dams, and steering coolers because RPO B2K triggered these through Special Equipment Option (SEO) Z5G. Engines were reworked by Callaway at its Old Lyme, Connecticut shop.
For Callaway twin-turbo Chevrolet engine coding was replaced as follows: First two digits for year, next three digits for Callaway sequence last four digits to match last tour digits of vehicle identification number.
1989: Same as above - ZF6 spd replaces the 4+3 Doug Nash od transmission.
1990:hp is now 390. For Callaway twin-turbo, Chevrolet engine coding was replaced as follows: First two digits for year, next three digits for Callaway sequence, last four digits to match last four digits of vehicle identification number.
1991: hp upped to 403. Callaway Twin-Turbo conversions ended with the 1991 model year. Callaway built the 500th twin-turbo on 9-26-91 and subsequent builds were specially badged and optioned (extra $600) as "Callaway 500."
(as few as 8 series 500's were built)
1992 + Supernatural series is born
hnoes
