1987 Buick Turbo - Power Trip
Part IV: Choices Made
From the January, 2007 issue of GM High-Tech Performance
By Rick Jensen
Photography by Rick Jensen
This month I'm taking a break from the in-depth tech buildup on my 1987 Turbo-T. Instead, I thought I'd write a quick recap of the major components that we've already covered, as well as give you a preview of some of the parts that I'd be installing in the next few issues. When street/strip Turbo Buicks are concerned, the right combination is everything. I'm shooting for a streetable, reliable, 10-second ride, and before I started this project, I did a ton of research and spoke to several Buick gurus about my goals. About 80 percent of the components used in the series were unanimous choices--the other 20 or so percent varied, and most of that involved turbo sizing, cam choice, and converter stall.
I believe the choices made concerning parts selection were good ones, but there are some compromises here--that's what happens when ultimate ET, streetability, and dollar signs come into play. The parts shown here make up this T's combo going forward. Did I choose wisely? We'll soon find out.
Block: Stock "109" Specs:...
Block: Stock "109"
Specs: iron, casting number 25526109, machined to Hartline Performance specs
Block support: RJC Racing...
Block support: RJC Racing girdle
Specs: 1018 billet steel, .75-inch thick, CNC-machined
Camshaft: COMP hydraulic ...
Camshaft: COMP hydraulic roller...
...Specs: Aus tempered, 210/210...
...Specs: Aus tempered, 210/210 duration at .050, .317 lobe lift, .523-inch lift with 1.65-ratio rockers, 110 LSA
Rotating assembly: Stock crankshaft,...
Rotating assembly: Stock crankshaft, stock rods, JE pistons
Specs: GM crank 1260873 and rods 25506520 machined to Hartline performance specs. 3.805 JE forged pistons, 2618 aluminum, full floating pins, dual spiro locks, high-strength chrome bar stock wrist pins
Heads: Champion "8445" Specs:...
Heads: Champion "8445"
Specs: factory iron, casting number 25518445, heat riser filled, CNC-ported, intake/exhaust ports hand-finished, 46cc chambers, 1.77-inch/1.50-inch Ferrea stainless steel valves
Rocker Arms: T&D
Specs: Shaft-mount, needle...
Specs: Shaft-mount, needle bearing design, machined cups, roller tip, 1.65-ratio
Manifold: Champion ported...
Manifold: Champion ported
Specs: factory aluminum, CNC-ported, and hand-polished
Intake: PTE doghouse Specs:...
Intake: PTE doghouse
Specs: contoured, high-flow upper intake
Throttle Body: Accufab Specs:...
Throttle Body: Accufab
Specs: 70 mm
Fuel Injectors: 75 lb/hr Specs:...
Fuel Injectors: 75 lb/hr
Specs: Low-impedance Delphi, flow-matched
Turbo: Precision Turbo & Engine...
Turbo: Precision Turbo & Engine 67
Specs: 67GTQ, T04S cover (4-inch inlet/2.5 outlet), .63 A/R turbine, .70 A/R compressor, internal wastegate
Intercooler: Precision Turbo...
Intercooler: Precision Turbo & Engine stock-location
Specs: stock-location, 19-row,13x17.25x3, bar and plate design, 3-inch inlet/outlet
Engine Management: FAST XFI...
Engine Management: FAST XFI
Specs: aftermarket EFI system with built-in wide-band O2, Windows-based software, multiple calibration storage, one to five-bar MAP, boost control, converter lockup
XFI Adapter: Caspers Electronics...
XFI Adapter: Caspers Electronics ECU Adapter Module
Specs: Plug-N-Play, connects XFI to '86-89 turbo engine harness
Torque Converter: Precision...
Torque Converter: Precision Industries 3500-stall
Specs: Vigilante 9.5-inch, five-disc, lockup, 3500-stall speed