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12363230  - HT 3.4
     
Technical Information Customize Service Parts List


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Tired of that tired 2.8 V6 in your S-truck? It's time for a major upgrade, GM Performance Parts style. The HT 3.4 is a bolt in replacement for the 2.8 V6 in your 1982 - 1985 S-10 pickup or Blazer with automatic transmission. And it's emission legal in 49 states (Yes, you guessed it, California said no.) But for the rest of us, the HT 3.4 is the best thing going. With 160 horsepower and 194 Ft. Lbs. of torque your truck will feel better than new, and tow better than ever. The heads have large 1.72" intake and 1.42" exhaust valves and combustion chambers that yield a healthy 9 to 1 compression ratio. The camshaft is a high lift, short duration design, developed to produce lots of strong low end torque and mid range horsepower. With .427" intake and .454" exhaust lift, the cam ensures a strong pull to 5000 RPM. Doesn't sound like your 2.8 V6 at all does it? It isn't, when GM Performance Parts develops an engine we focus on making power. But not power for the sake of power, but power where you need it. For great drivability, towing performance and maybe even a little off road fun. The HT 3.4, a serious upgrade for your favorite little truck. With 40 more horsepower than your 2.8 V6, why would you even consider rebuilding that old 2.8? The induction system, ignition system, exhaust, emission controls, water pump and other parts required to bolt in your new HT 3.4 are already on your truck. Sounds like a weekend project or talk to your GM Performance Parts Authorized Center, they can install it for you.  
Technical Notes: This is for engines with carburetors only, not released for TBI usage. This engine does not have a clutch boss on the side of the block for standard transmission application.  

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HT 3.4 Technical Information
Horsepower 160@ 50000 RPM
Torque 194 @ 2700 RPM
Compression Ratio 9:1
Block Cast iron
Pistons 14097653
Camshaft 12363220 Hydraulic flat tappet
Lift:  .427" I, 454" E,
Duration @ .050:204º I, 216º E.
Cylinder Heads 14054884 Cast iron
Intake Valves 14024249 1.72"
Exhaust Valves 14031332 1.42"
Valve Springs 12363215
Rocker Arms 14002446
Valve Lash Zero
Fuel 89 octane
Technical Notes:  The HT 3.4 requires an electric fuel pump.
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Customize Your HT 3.4 with GM Performance Parts
Below is a sample of the parts that you'll find throughout our catalog to help you complete your engine installation or customize your crate engine for your specific application.
14085472 Automatic Transmission Flexplate
14044991 2 Barrell Aluminum Intake Manifold
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