Chevy's V8s acquire been forging comic gift for decades.
Chevrolet's Four hundred may have been the largest displacement meager block GM ever produced, on the other hand it was never intended for the greatness it would one generation contemplate. A product of the dismal 1970s, the 400's increased displacement individual happened owing to GM couldn't good buy a system to receive its Three hundred fifty to constitute the torque that Motor lorry buyers desired while cattle call emissions standards. Decades next, this most massive of mice is regarded as one of the peak performance platforms outside there-provided that you can treasure one.
Instructions
1. Begin with an aftermarket iron engine block from Motown, Nature Products, Merlin or GM's "Bowtie" tuning division. A inventory two-bolt leading cap Four hundred block wouldn't stand a chance of handling the beneficent of influence this combination is capable of.
2. Install a Shod Fourty three thousand fourty chrome-moly crankshaft with a 3.75 inch stroke, 2.448 inch mains and 2.10 inch rod journals. Use a set of turbochargers with Seventy to Seventy two mm inlets; no matter what manufacturer or compressor trim level you choose, horsepower is ultimately determined by inlet housing size.7. Connect the turbocharger outlets to the throttle body via the largest capacity air-to-air intercooler that will fit in your vehicle.
3. Install a hydraulic curler camshaft with Two hundred thirty six degrees of activity at 0.050 lift on the intake and exhaust and 0.60 inches of complete lift. Link the crankshaft to the cam with a gear-drive instead of a timing chain.
4. Install a allot of race-spec aluminium heads flowing at least One hundred thirteen cfm and Ninety cfm on the intake and exhaust (respectively) at 0.200 inches of lift, and Two hundred eighty four cfm and Two hundred four cfm on the intake and exhaust (respectively) at 0.650 inch lift. The heads should annex 67cc combustion chambers to yield a compression ratio of about 9:1 with a 4.155x0.043 copper head gasket. Brodix, World Products and Dart all make such heads. Use Inconel exhaust valves to handle the heat.
5. Bolt on a sheetmetal intake designed to work with multi-point fuel injection. Then utilize a reprogrammable aftermarket injection system. Holley, Accel and Electromotive all make such systems. Install Eighty three lb/hr injectors and a return-style fuel pump/regulator/line package capable of maintaining at least Sixty psi. The Sixty two mm throttle body from a 2003/04 Mustang cobra will work for air control.
6. Install a set of custom made turbo exhaust headers with Three hundred fourteen stainless steel flanges and 2-inch diameter, Three hundred twenty one stainless steel tubes. Utilize a set of electronically activated exhaust wastegates. Lunati, Motown, Eagle and Scat create such units. Appropriate 6.00 inch lingering, Shod, I-beam connecting rods rated at least Nine hundred fifty horsepower; this combination Testament exceed that by positively a bit, on the other hand the plant horsepower ranking assumes you'll be using high-rpm to cause influence. The turbochargers used in this operate are even easier on rods than altitudinous rpm. Install a establish of Two thousand six hundred eighteen Shod aluminium, turbo-specific pistons with a 4.155 Muzzle extent and a 28cc dish.
