Tunnel Ram 406 sbc crank start

406 sbc in a 69 Chevelle. With AFR227 heads using on a tunnel ram setup. Just finished putting it together. I'm running the engine with open headers. Soon it will be on the road. The manifold is an Edelbrock TR1X, with a pair of modified Holley 390 vacuum secondary mounted sideways. Each Holley 390's were changed from a single feed to a dual feed setup, and replace the secondary metering plate to a metering block from a pair of old 780 Holley. I also had to increase the size of jets on the pri and on the sec. It was running a little lean. I replace the accelerator pump cam to a blue cam and changed it to a #2 setting, and the squirter size was never changed. I'm using an electric choke on the rear carburetor for easy start. The choke assembly on the front carb was removed for clearance. The linkage setup I got is from Holley. I added a balance line for uniform secondary operation. The distributor I'm using is a non-vacuum advance, 100% mechanical. (Never did like vacuum advance). It's using 1.6 roller rockers from Comp. Eng., Chromemoly push rods, and a 280HFT cam from Comp. Cam and it is gear driven . The 406 has 11:1 compression forge pistons with 5.7" connecting rods. I had this tunnel ram setup for over 30 years. I had this same setup on 311 sbc (307 bored 30 over), on my 355 sbc, and now my 406 sbc. Throttle response is as sharp as a razor blade with No flat spots, No bogs, No plug fouling.....nothing.

More Videos...

Dyno Proven: 50 HP With One Bolt-On! - Engine Masters Ep. 1
Engine Masters, presented by AMSOIL, is an all-new show for the Motor Trend channel! Each episode takes you into the engine-Dyno room where power claims are questioned and head-to-head shootouts ensue. Engine Masters finds the truth about speed parts and has a lot of fun doing it with hosts David Freiburger of HOT ROD and Roadkill, Steve Dulcich of Engine Masters magazine, and Steve Brule of Westech Performance Group. In this first episode you’ll find out if Blueprint Engines is accurate in its advertised power for a 400ci Chevy small-block crate engine, and then we’ll see if Freiburger is justified in his love for dual carburetors and high-rise tunnel-ram intake manifolds—plus there’s cash on the line. In upcoming episodes you’ll see carbs versus EFI, Chevy versus Mopar, Edelbrock versus Holley carburetors and lots more. Come back to the Motor Trend channel of YouTube or to MotorTrendOnDemand.com for more of Engine Masters, presented by AMSOIL. Subscribe now to make sure you're in on all the action! http://www.youtube.com/subscription_center?add_user=motortrend Facebook -http://facebook.com/motortrendmag & http://facebook.com/HotRodEngineMasters Instagram @EngineMasters

Built 327 Chevy
1964 small journal two bolt mains. Bored 0.30. Flat top pistons, 2.02/1.6 world sportsman 2 cast heads, 1.6 flat tappet rockers, 284/296 comp xtreme energy hydraulic flat tappet cam. Weiand tunnel ram and two holley 650cfm carbs. Timing set at zero degrees

74 pro street nova 383 tunnel ram idle and walk around
74 nova with a 72 front end' 383 11.1 comp' tunnel ram' 350 turbo trans' 3500 stall' 12 bolt 4.11 rear

Tunnel ram tuning
I had a very large bog off the line that was killing my 60' times which have dropped from a best of 1.46 to 1.65. Tuning out a flat spot on my tunnel ram fitted with 660 holleys , home made pump cams, drilled shooters. Nearly there but not quite.