How to Build a Twin Turbo Big Block Chevy

Step-by-Step Guide

1. 1

   Step 1: Buy a 502 crate motor 8.75:1 compression ratio.

   Re-clearance the rotation assembly
   - extra clearance in the bearings for additional crank flex, and open up the ring gaps for the additional heat of the turbocharger.
2. 2

   Step 2: Learn how to read a turbo map

   For an old school 800hp setup
   - a pair of T04B V1/V2 compressors, P trim turbine with about a
   1.2A/R is a good start.
   
   For a more modern setup, a pair of GT4094's would be a powerful combo with low RPM spool up. , A boost referenced FPR is a must.
   
   I would use either a Racepumps mechanical pump, Aeromotive, Holley Performance Products or similar.
   
   Blow through carb, fuel injection, will both work.
   
   CSU makes a nice Blowthrough carb setup. , Keep the timing low to avoid detonation.
   
   Tune it for whatever fuel you will be running most of the time.
   
   A wideband 02 monitor is a must. ,
3. 3

   Step 3: decide what your horsepower goal is

4. 4

   Step 4: and buy the correct turbos.

5. 5

   Step 5: Spend the money on your fuel system to keep up with the horsepower and boost levels.

6. 6

   Step 6: Tune it fat to start

7. 7

   Step 7: and with low boost.

8. 8

   Step 8: Enjoy...

Detailed Guide

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