JMacPerformance dyno tunes a 600 horsepower 350 small block Chevy


The 350 was built by a high school friend of mine Rodney Reimer.

His 68′ El Camino which was featured in the pages of Car Craft January 2009 has a turbo 400 transmission with a 5500 RPM stall converter, 12 bolt rear-end with 4.30 gears, and 10″ wide Hoosier quick street DOT rear tires.

The goal of the build was to make 600 Horsepower on E85 fuel

The build started with a stock GM 4 bolt main block that received the usual machine work: Bored .030 over, decked, and line honed.  It received a full fill of blok-hard to increase the integrity of the block and for a little added security

The list of major compentents: 

357 ci
4.030 forged pistons – 12.2/1 compression
Heads Profiler 210cc and 2892 Super Victor manifold prepared by Juan Mendoza / Flow Technology
Pro Systems Carburetor E85 950
Custom Comp Cams XE 292
solid roller / steel billet  108 lsa
1.6 intake / 1.5 exhaust rockers
Schoenfeld 1 3/4 headers
Thru 3″ magna flow mufflers

After running the engine for 20 minutes on the dyno the valve lash and all the fasteners were checked. We did a few quick pulls to optimize the timing at 38 total degress and ensure the air fuel ratio was in a safe 12.5/1 range.

The engine ran flawlessly making 601 Horsepower and 497 lb-ft of Torque

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601 horsepower will get his El Camino well in the 10 second quarter mile ET’s