
Twin Turbos!
Yup, I'm joining the artifically-aspirated crowd.
Why? Power, of course! I was running about 12.9s naturally aspirated with a streetable
package but with gearing that wasn't exactly Autobahn-friendly (4.10s). Also, I felt that other than a
cylinder head upgrade, there wasn't much else I could do to get more power/acceleration without
futher sacrificing driveability.
I've broken up this page because it was getting so large, so if you want more about the turbo project,
click the appropriate links below.
Turbo Project Information:
Click here for info on
how this is all getting set up and organized and all that. Includes a turbo conversion
parts list and also pictures and explanation of everything.
Progress Pictures:
If you want to see lots of pictures, click
here for
a pile of categorized thumbnails of my project that you can click on for full-sized images.
Problem!:
And a significant one at that. I cleaned
the block and crank, put in the new bearings, installed the crank, and started wiping down the cyinders to
prepare for piston/rod installation when I found this in cylinder #4:
And on #6:
Okay, so I've got a cracked block. Peachy. Well, that was back in April of 2002 and now I've got a different
block to use for the build-up.
12/30/02:
My "new" 1970 4-bolt main 350 shortblock looks original (cast on June 18, 1970 in the five o'clock (or is it the fifth hour?) hour during
the night shift) but it has a little rust in the cylinders. I brought the block to the machine shop on December 27th
and they said it should be done by January 3. I sure hope it is, I'm dying to get started putting it together! I've
been working on minor things here and there, but there's not too much I can do until I get the block back.
Here are the planned specs for my car for 2003:
My Engine:
- '70 350 block, bored .030" over
- Stock cast crank turned down .010"/.010"
- Rebuilt 5.7" rods with ARP Waveloc bolts from
Northern Auto Parts Warehouse
- TRW L2256F forged pistons
- 8.2:1 static compression ratio
- Speed Pro moly rings
- Melling M55A oil pump
- Moroso oil pump pickup
- Moroso 7-quart oil pan
- Vibratech 6-3/4" StreetDampr harmonic balancer
- Summit Racing cam - 224/224 degrees
duration @ .050" lift, .465"/.465" valve lift, 114 degree LDA
- #882 heads with 1.94"/1.50" valves, ported by yours truly, 80.5 cc chambers
- Crane Gold full-roller rockers, 1.5:1 on intake, 1.6:1 on exhaust
- Edelbrock Sure Seat valvesprings
- Edelbrock Victor Jr. 4+4 intake manifold
- Holley 650 cfm double-pumper carb modified for blow-through use
- K&N RE-0910 clamp-on air filters
- MSD 6BTM ignition box, Pro Billet distributor and Blaster 3 Power Tower coil
- Two Garrett T3 turbos with 60-trim compressors and .63 A/R turbines
- Ford PowerStroke intercooler
- Homemade 1.6" I.D. headers
- Mandrel-bent 3" into 2-1/2" dual exhaust all the way to the rear bumper with cutouts and Thrush California Turbo mufflers
The Rest of the Driveline:
- Energy Suspension polyurethane motor mounts and transmission mount
- TH 350 with B&M Shift Improver Kit (which I highly recommend!)
- Hayden tube-and-fin tranny cooler
- Midwest converter (haven't decided on stall speed yet)
- Stock driveshaft with Summit safety loop
- '72 8.5" 10-bolt rearend housing
- '73 or '74 Nova Eaton posi carrier
- GM 3.23:1 ring & pinion
- Tom's Kick Ass replacement axles
- Homemade traction bars
Chassis and Suspension:
- Stock unibody frame with homemade subframe connectors welded in
- Energy Suspension's graphite-impregnated polyurethane body mount bushings
- Energy Suspension's graphite-impregnated polyurethane leaf spring bushings and pads
- Original front V8 w/ A/C coil springs with one coil removed
- Herb Adams 3-way adjustable shocks on all four corners
- Relocated upper control arm (per Dick Guldstrand's
recommendations) for more positive camber gain
- Energy Suspension's graphite-impregnated polyurethane upper and lower control arm bushings and
bump stops
- Hellwig 1-1/8" front anti-sway bar with Energy Suspension's graphite-impregnated polyurethane bushings
- Addco 3/4" rear anti-sway bar with polyurethane bushings
- Front steering system rebuilt in '97 including tie
rods, sleeves, ball joints, idler arm, and Pitman arm.
- Rebuilt power steering gearbox with 12:1 ratio and
high effort valve by Lee Power Steering.
- Rebuilt power steering pump by Lee Power Steering.
- '73 Nova SS tilt steering column
If you have any questions or comments, feel free to e-mail me.
Copyright © 2005 Bruce Johnson and Craig Watson