WebMar 12, 2024 · The smaller L99 heads were down on flow by 10 to 15 cfm (depending on valve lift), but the smaller chambers (49cc vs. 57 to 58cc) meant a head swap might not yield the desired power results. Testing the L99 Intakes The 4.3L L99 was first run with the stock LT1 intake, stock throttle body and 1-3/4 inch long-tube headers. WebNov 16, 2024 · The L99 and LS3 heads have rectangle intake ports. The lighter hollow stem valves used in the LS3 can be installed in L99 heads to increase the rpm range. It is also common to CNC port and/or mill them up to 0.030 inch to increase compression and better airflow. There are many aftermarket cylinder heads available.
LSA/LS3 Cylinder Head Shoot out – Fi Interchillers Online Store
WebFeb 8, 2024 · Just purchase the service, and send us yours for porting! Available options: No LS3 Throttle Body Chevrolet Performance - LS Throttle Body for LS3 / L99 (19420707) $ 315.99 $ 300.19 Purchase now and earn 119 Reward Points. Learn More about GPI Reward Program $124.99 $118.74 In Stock Buy in monthly payments with Affirm on orders over … Web1 hour ago · Ken Hinkley lets rip at critics of Jason Horne-Francis after Port Adelaide young gun was BOOED by fans during win over Western Bulldogs: 'It's really annoying me, he's 19 years old' how many calories do you burn an hour sitting
Ported and milled heads? - Camaro5 Chevy Camaro Forum / …
WebJun 22, 2024 · While the additional head flow could support well over 700 hp, run on this stock application, the ported heads improved the power output to only 503 hp and 497 ft … WebBrand M (aftermarket casting CNC ported LS3 head) Stock LSA vs Brand H First on the list is Brand H – CNC ported LSA head. The Stock LSA intake port is 259cc Brand H intake port is 287.5cc With huge flow numbers and an efficient port shape, the GPI CNC ported LS3 offering is truly bolt-on performance! Intake Port Volume: 281cc. Exhaust Port Volume: 98cc. Our 281CC LS3 / L92 / L99 / LSA head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding ... how many calories do we burn without exercise