Hello im looking for some advice on adding more horse power to a new crate Chev 350/357 hsp. Where and what's your thoughts..
As the latest in Chevrolet Performance’s Street Performance crate-engine lineup, the SP350/357 is designed as an affordable performer to match just about any budget. Better still, it uses strong components and modern technology to make it a better alternative to rebuilding. The SP350/357 leverages the strength of a strong rotating assembly secured in a brand-new block with four-bolt mains, and matches it with modern valvetrain technology to support high-rpm capability.

• Horsepower

  357 HP

• Torque

  407 LB-FT

• Tech Specs

  Engine Type: Chevy Small-Block V-8
  
  Displacement (cu. in.): 350
  
  Bore x Stroke (in.): 4.000 x 3.480
  
  Block (P/N 10105123): Cast iron with 4-bolt main caps
  
  Crankshaft (P/N 10243070): Nodular Iron
  
  Connecting Rods (P/N 10108688): Powdered metal
  
  Pistons (P/N 88894280): Cast aluminum
  
  Camshaft Type (P/N 12677151): Hydraulic roller
  
  Camshaft Lift (in.): 0.473” intake / 0.473” exhaust
  
  Camshaft Duration (@.050 in.): 215° intake / 223° exhaust
  
  Cylinder Heads: Cast iron; as cast with 64-cc chambers
  
  Valve Size (in): 1.940 intake / 1.500 exhaust
  
  Compression Ratio: 9.0:1 nominal
  
  Required Fuel: Premium
  
  Maximum Recommended rpm: 5600

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I have the same engine, I have a First Performance intake on it, Holley HP ecu running it, headers of course. Haven't dynoed it but I will in the spring. None of that added any power I'm sure, but it's a great all around engine.

 

How much money do you want to throw at it?
You could put in a different cam and up the hp a little. If you want a big difference add these heads & a cam.

https://promaxxperformance.com/product/maxx-183-sbc/

They have other choices.

https://promaxxperformance.com/maxx-series/

 

What ^he^ said.

Know that this is Gross HP. As installed, results will vary greatly depending on equipment, but it'll likely be under 300hp as installed, using hp metrics that we're more used to using. (how the OEM does it)....and you'd probably see something around 260 RWHP....ish. Better than stock for sure but not the same as an OEM car with "357 hp".