Of all the performance built street cars I have built over the years, this car this car has the most outstanding response fastest spooling of all others!
The headers are custom built with 1-5/8" primary tubes, the converter is a perfect match, and the turbo orientation is optimized as it is in a fore-and-aft position which allows a downpipe with a shallow bend, not at 90 degrees. A Pypes 3" dual exhaust provides minimum exhaust restriction.
The 295/15 ET street tires with 10" wheels provide an outstanding performance when leaving a stop light, and will surprise most all you would encounter on the street.
I chose the smallest housing of the Borg-Warner EFR series to provide 650 RWHP and excellent response. With 270 cu.in. and race-ported TA alum heads, it should be an easy 10 sec. ride and high 9 sec. trips at the track.
My research when planning this build, I did not see the need for a twin scroll exhaust housing as the 4.1 has enormous low and mid-range torque. Of course the B-W turbo exhaust wheel is the latest billet, light unit available.
A Turbo-Smart boost controller on the dash allows in-car adjustment and provides a digital boost readout.
The H-R rear anti-roll bar provides excellent traction, and the rear has an Auburn Pro unit w/30 spine axles. H-R upper and lower control arms a attached the re-inforced frame brackets.
Even though this was intended to be a killer street car, it has lots of parts and technology from the race car which included a complete fuel system w/-6/-8 AN lines and a billet sender with the DW400 pump, and 140# injectors on e-85, which is controlled by a FAST XFI 2.0.
Ignition is a TR6 and just received my modified cam sensor which help provide proper spark at 7000 RPM when wanted!
When I decided to build a killer street car, John Norton from Borg-Warner have been friends for years, and he was instrumental in helping me with this concept.
The only reason I decided to part with this car is a health condition, I am doing better, but after 30+ years of turbo Buick work, time for me to downsize.
It is difficult for me to part with my Limited, but someone will end up with a piece of turbo Buick history which will be very difficult to duplicate, and would take at least $30K for the parts, and a few hundred hours of labor, maybe more with the Vintage Air conversion.