the performance and reliability of your Buick V6 Turbo for Street or
Track Buick V6
Turbo Tech, Guide and Modifications Build
Recipes. Parts Needed. Who & Where to Buy. Part #. How Much/$$.
191987 Buick Grand National Original Owner -
2005 Buick GS Nationals. Bowling Green, Kentucky
This 87 GN was driven from WI to KY and back
home 1200 miles
It was sent to a friend of mine, his detail
shop, waxed and driven WI to KY.
Turbo Tech, Guide and Modifications
Spring Cleaning Guide:
Buick V6 Turbo and Grand National Oil, Oil
Filter, Transmission Filter and Pan Gasket,
Transmission Fluid, 6 Spark Plugs: NGK UR 5 Gapped
tight 0.030, Spark Plug Wires, Coil Pack with New
Seal, Positraction Rear End Gear Oil with
Additive to prevent rear end chatter/noises, AC
Fuel Filter, PCV Valve, Clean Air Filter.
General List of Modifications
60# Fuel Injectors, with a Turbo Tweak Chip, Scantool
(Scanmaster or Scanmaster-G), 30# Turbo Boost gauge and
upgraded intercooler (Front mount or stretched
stock location), XP Plus Fuel pump, Turbo Tweak
255LPH Fuel Pump, Walbro 340 255lph fuel pump with
Fuel Pump Hotwire Kit (Hotwire Kit improves
voltage to fuel pump and that increases output of
fuel pump), MAF pipe with Tinman 4" Cold Air Kit, 160* t-stat,
New Spark Plug Wires, NGK UR5 Spark Plugs gapped
tight at .030. Accufab adjustable fuel pressure regulator with
fuel pressure gauge, Two (2) Valve cover breathers for both valve
covers, PCV check valve to be used in conjunction with the stock
PCV, Stock 200-4r transmission, leave the factory 3.42 rear gears
alone, (this ratio has been proven to work the
best with the power curve that these V6's have. Some of the fastest
cars in the country that still run a factory built
up 8.5" rearend, have done it with 3.42
gears, some of them with the original OEM gears
and these are cars that have run well into the low
9's to high 8's), Upgrade to 70mm throttle body
(stock is ok) with larger upper plenum, and ALWAYS
install RJC Plenum power plate, Add manual boost
control valve, 3" mandrel bent stainless
steel downpipe, and verify absolutely no exhaust leaks before
the turbo, at least a 2.5" (3"
preferred) dual exhaust with
straight flow through style mufflers (aka No
Flowmasters, not on a turbo car), upgrade to 100# valve springs, replace the
timing chain with a double roller ($60) or at a minimum
a stock replacement that has a steel gear (June
2019 - my 87
GN ate the timing chain and broken rocker arm
which is the cost of a new motor), remove front sway
bar to reduce front end weight (good for drag
racing and bad for driving on street when
turning), Upgrade rear suspension components, for
example; Replace Stock Sway Bar with HRpartsNstuff
Anti Roll Sway Bar or comparable, optional dual air bags, posi unit, lite weight wheels and
either MT S/S tires, 27" DOT bias ply or 28" slicks.
On a strong, good running, correctly tuned Turbo
Buick, this is a combo for low 11's on either
straight race gas or alky injection with pump gas.
All it basically takes is tuning the car to run
the boost 20-28 psi with
zero knock retard.
Racing Every Turbo Buick 10 second
and slower should
install a Plenum Power Plate ($65 for STOCK Plenum
for stock motor), RJC Rear Engine Brace $99. Parts and combinations for the best bang for the
10, 11 second Recipes
from RJC Racing. The most important aspect is
to begin with a solid Buick V6 Turbo along with
tuning tools to meet your needs. The Minimum
Tools required to achieve any goals are Boost
Gauge, Knock Gauge and Scantool! Recipes:11.51@117 mph
10.68@126 mph9.89@136 mph9.21@149 mph.
Tweak LT1-3" MAF $130
MAF Tuning Device aka MAF Translator $200 (#1004),
TurboTweak Street 93 Octane Fuel Chip $120 (#1000)
60# Siemens Fuel Injectors $270 (#1010) or
Fuel Injector/Chip Combo - Buick/TTA $360
Buick Scantool - Scanmaster 2.1 for Buick $250
(#1007 Red Display or #1007 Blue Display) or
Buick Scantool - Scanmaster-G Gauge $260
(#1007-Buick-G-Black, 2-1/16" Gauge)
Turbo Tweak TT255LPH High Flow Turbine Fuel Pump
$100 (#TT255LPH). 2 year Warranty.
TT255LPH fuel pump should be used with Fuel Pump
Wiring Kit aka Hotwire Kit $65
(#1014-Buick) to improve voltage to the pump, thus
increases output of pump.
Performance 3" Stainless Steel
Dual Cat Back Exhaust with Mufflers and Mild Steel
U Bolt Clamps $729, test pipe/cutout optional.
OCTOBER 2, 2010 ---- SCANMASTER RESULTS after road
trip, taken at idle.
02 = 792 (best tuned .750 - .770)
leaner is meaner w/out knock, higher is safer)
AF = 4 (air/fuel best 4-6)
L8 = 30 (engine load = 30-40)
bat = 13.7 (battery 13.5 or higher)
INT = 128 (integrator 118 - 138, ideally 128)
blm = 126 (block learn lean side 118 - 138, rich
side, ideally 128)
mph = 0
CLT = 170 (coolant)
ATS = 124 (air temp)
r = 800 (rpm)
TPS = .44 (throttle position sensor 0.42 - 0.44,
WOT = 4.6 - 4.8)
IAC = 21 (idle air control 10- 40 good at idle,
best at under 30)
fuel pressure 37-43 with line off car at idle in
park. start at 43, stock 34-40.
Oil Pressure 10-15 PSI HOT
O2 of .790 or higher prevents excessive retard.
at Race Track Tune for Best MPH, ET Varies with
NOTE: time slips in the 1/4 mile at GS Nationals, Beech Bend Race Park, Bowling Green, Kentucky 2010.
1/4 mile: 60'=1.806 with
12.396 @ 108.95 mph (1/8=7.900)
on Kumho 245/50/16" Street Tires.
Youtube Video 12.909 @ 108.95 mph is of my 87 GNX
with Driver: Jim Carswell and myself as passenger.
Below #9987 at 2013 GS Nationals. TSE Champion Bob Hinson as driver of my 87
FYI - I removed the driver floor mat and ran
firstname.lastname@example.org mph after
ALWAYS REMOVE DRIVER SIDE FLOOR MAT or push it
to the side when Racing...
'87 GN "Hard Top" GNX Clone March
4, 2008 through
May 12, 2020: PURCHASED
MARCH 4, 2008 with 88,000 ORIGINAL MILES.
1987 Buick Regal Grand National V6 Turbo 3.8 liter.
12/87 Build Date
Bolt-on Parts! 20-25#'s Boost, No Knock! Tire Store (05/2019):Install 4 New Kumho 245/50/16 Tires. $280 plus
Beyond Redline Perf (05/2019):Install GN1 SEHeaders, Spark Plugs, Steering,
Tim & Jay's (07/2017):Installed Two 3" BORLA XR-1 Racing Oval
Mufflers to 3" Stainless Steel Dual Exhaust
Upgraded to 3.5" Aluminum Drive Shaft $650.
Installed TINMAN 4" Cold Air Intake $285.
Installed New Radio, Speakers,
Amp & Subwoofer (07/2016):
JVC CD Receiver KD-R970BTS
KICKER Front Dash 3.5"
Speakers and Rear KICKER 4" x 8" Speakers
KICKER AMP CXA 1200.1/2400 Watt
AMP Total Power Output
[Watts RMS]: CERTIFIED 1283.
KICKER Live Loud CVX COMPVX12 -
12" Subwoofer. $299
Tim & Jay's (08/16):Add Transmission Cooler $90. Replace Dash Trim Panel
Transmission Vince Janis
(02/16):200-R4 Stage 1 Transmission $2,000
(04/15): AlkyControl Kit Single.
(04/15): PTC 10" Street, 2800 Stall Lock Up.
Tim & Jay's (07/12):
Installed GNX Fender Flares and Vent.
MAF, Translator, TT 93 Street Chip, 60# Fuel
Front Mount Intercooler, 3" Down Pipe with
External Wastegate & External Boost Controller,
3" Stainless Steel Dual Exhaust. Full Throttle Speed:Scanmaster
and Adjustable Fuel Pressure Regulator. RJC Racing:RJC
Air Distribution Plenum Power Plate. Red Armstrong / Quad Air:XP
Plus Fuel Pump with Hotwire/Fuel Pump Feeder Kit. Kirban Performance:TA-49
Turbo (up to 545 HP), GNX 16x8 Honeycomb Rims, GNX
Fender Flares, Brace Kit Front & Rear, Ignition
Coil Pack & Spark Plug Wires, 160 Thermostat,
Reproduction Rear Bumper Fillers, Front Bumper
Fillers, Steel Hood Shocks, Polished Aluminum MAF
Pipe, Angled Billet Oil Fill Tube & Breather
Kit, A-Pillar Boost & Knock Gauges, Engine
Tie-Down Strap. GBodyParts:F
Body Aluminum Radiator with Dual Fans, Vacuum
Brakes, Stainless Steel Catalytic Converter Hanger. HRpartsNstuff:Anti-Roll/Rear
Sway Bar, Lower & Upper Double Adjustable
Control Arms, Dual Air Bags with Spacers and Drive
Shaft Safety Loop. Cotton's Performance:Heated
Oxygen "02" Sensor Kit.
Rearview Mirror, Shocks, Head Lights, Brembo Brakes,
Ceramic Pads, Calipers, Repacked Bearings, 8"
K&N Air Filter, NOS Grey Leather Steering Wheel
with Billet Ring, NOS Black Headlight Bezels, NGK
UR5 Spark Plugs (Gapped Tight 0.030), Windshield
Bottle & Radiator Overflow Plus Caps, Original
Radiator Cap "Made in England".
Differential Cover, Turbo Shield, Wheels, Front
& Rear Emblems, Embroidered Headrests, GNX Dash
#487, ASC Stickers (Door Jamb/Emission/Intercooler),
Vents, Flares, Owners Manual, Fender Cover and GNX
12.909 @ 109 mph.
2011 -- 1987 Buick GNX Clone
Next Pass, Removed Floor Mat and Ran 12.396 @
Stock Motor 100k miles, Stock Converter, Stock
Kumho 16x8" Street Radial Tires (inside car video follows).
1987 Buick Grand
National Hardtop GNX Clone. 4th Owner Brett Wallace
Buick GS Nationals, Bowling Green, Kentucky
1987 Buick GN Purchased March 4, 2008 for
87 GN aka GNX Clone seen in Photo 7/27/2008
and Above and 12.90 @ 109 mph youtube video.
Condition of this car in 2008 vs October 2011
and it will be at GS Nationals May 13-16, 2020.
Drag Race Stickers $30/car/day. Car Show Stickers
Contact Pam Berger, Asst Director.
- $25/person/day (available at gate).
and under are Free with an Adult.
13 - 16, 2020 Beech
Bend Park Campground/RVMap Drag
Racing "Test-N-Tune" Wednesday through Friday
Car Show - Friday |
Race Eliminations - Saturday
Car Show. Vendors Row. Swap Meet. Wed - Sat: 8 am - 6 pm