Fuel injectors: The standard 28-pound injectors only support about 390 hp at 90-percent duty cycle. … Upgrading the LS1 Fuel System and Tuning the Engine But, for engines turning 5,500+ rpm (minimum), or are subject to nitrous backfires, they begin to make more sense. Single-plane intakes don’t make as much torque or power as the tunnel rams. If hood clearance isn’t an issue, tunnel rams produce big gains at 6,000+ rpm. 
Aftermarket manifolds usually have a four-bolt flange. LS1 and LS6 throttle bodies were both 78mm and had a three-bolt mounting flange. The Corvettes came with electronic throttle control (drive-by-wire).
When changing intakes, take note of the throttle body and the number of bolt holes in the mounting flange.į-body cars and the 2004 GTO were cable-operated. These are generally better for cars with stock gearing and a mild converter. Long-runner intakes make more power through the entire range. Aftermarket intakes can produce strong gains with a 90mm (LS2) throttle body. Short-runner intakes are better from 5500 rpm and up. The throttle body diameters are identical. 
If you have an LS1, upgrading to the LS6 intake is inexpensive and popular. … Upgrading the LS1 Intake Manifold and Throttle Body ( Summit Racing’s Paul Spurlock contributed to this article.) Here’s the path to upgrading your powerplant to achieve maximum performance. #Best ls1 tuning software mods#
If you’re on the hunt for the best mods for your LS1 engine, you’re in the right place. The aluminum blocks are not as strong as the LS-based iron-block Vortec truck engines like the LQ4 and LQ9, but both the LS1 and LS6 can be pushed to over 850 horsepower with upgraded internals. On a stock LS1 engine, the following upgrades can improve performance and fuel economy:Ī stock LS6-a Gen III 5.7L aluminum block V8, just like the LS1-has more power than a stock LS1, but both can make the same power with common upgrades.
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