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Old 10-29-2007, 12:33 AM
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Paul Westcott Paul Westcott is offline
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Join Date: Aug 2004
Location: Phoenix, AZ, USA, Planet Earth
Posts: 172
Default EFI 455 Street and Strip

1967 Pontiac Tempest 2 Dr. HT ...originally an OHC-6 1barrel w/ 3 on the tree.

This car was designed and built to be a REAL street and strip car. As such, it is by definition, a compromise. It is not another of the all too numerous “race cars with a license plate” that pretend to be called a “street car” while screaming down the highway at 4000 RPM, sucking fuel like a Titan rocket! Seriously, what kind of gas mileage do you get and how practical and reliable is it on a long road trip? Oh, well! ...to each his own! My goal is a stealthy, reliable, pump gas friendly and relatively economical road cruiser that is also capable of kicking some ass in the quarter mile!


Engine Details, Etc.:
1970 XF code, 4-bolt main, 455 +.050 (467 cu. in.)
Stock Nodular crank turned 0.010
Cleavite bearings
Ross Custom flat top pistons
Hastings file fit rings
Eagle forged H-beam 6.625” rods
Zero decked
9.5:1 comp. ratio
Melling 60 psi oil pump
Balanced rotating assembly
SFI balancer
Fel-pro gaskets
#96 heads, ~96 cc, hardened seats, gasket matched, blocked crossovers and mild porting
Ferrea SS 2.11 / 1.77 valves
1.6 ratio aluminum roller rockers
Comp XE 274 cam 230/236@.050 523/529 lift w/1.6 rockers 110LSA
Comp Cams timing chain set, hyd. Lifters, valve springs and push rods
Edelbrock Performer RPM intake manifold
Holley 900 CFM TBI with 4 x 85 lb. per hour injectors
Megasquirt II v 3.0 ECU -controlling all fuel and ignition.
3/8” in / out fuel lines
Twin parallel MSD EFI inline fuel pumps
Innovate Wideband O2
HEI w/locked down mech. advance and no module
34 degrees advance in by ~3K rpm
MSD6AL box
MSD coil
MSD 8mm plug wires
Doug's Headers
3" pipes w/ 3" X pipe and 3” cut-outs
Dynomax Super Turbos
Dual Flex-a-Lite electric cooling fans

Trans Details:
’88 700R4 -w/Hytek max build
Transgo 700 shift kit
TCI BOP adapter
2500 stall converter, w/full lock-up
B&M trans cooler
B&M Megashifter

Rear end:
10-bolt BOP 8.2 Nodular GS type
3.55 Richmond gears
Auburn Pro posi
TA Performance Rear End Girdle
Moser custom alloy axles
SSM lift bars
Split, independent-fill air shocks
275-50-15 BFG Drag Radials (track)
245-60-15 BFG Radial T/A (street)

Misc.
PST polygraphite front suspension kit
MBM power front disc brake kit
OMZ Racing seats
Hurst Line-Lok

Highway Performance: Getting close to 20 MPG @ 70 mph cruise at 5% throttle!
-Runs nicely on the 91 octane oxygenated crap gas found here in Phoenix.

¼ Mile Performance: Only 1 trip to the track so far; ET 13.05 @ 107 mph with a momentary starting line bog and resulting lousy 60 ft. times. Pulls very hard thru top end!
More tuning needed w/TBI at launch.
-Looking for mid to upper 12’s?!
…Stay tuned!

Weight: ~3700 lbs. w/ driver

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__________________
The 1967 Rustbelt Refugee. Work in progress. Donations accepted.

- 467 Cubic Inch EFI Pontiac, Megasquirt II v.3.O ECU, 700R4, 3.55 gears -

Best 1/4-mile ET: 12.79 @ 107.36 MPH - Best Fuel Economy: 18.47 MPG

...That's no GTO, that's a Tempest!