WebCylinder Head Flow Data At 28" H2O Chevy Manufacturer /Part Number Port/Vol Intake / Exhaust Valve Size Intake / Exhaust Combust. Chamber Volume.100" Intake / … WebJul 2, 2006 · When I asked for the Flow numbers here is what was emailed to me: "Brad, here are the important Flow Numbers: .300 lift=106cfm. .400 lift=132cfm. .500 lift=141cfm. .600 lift=145cfm. .700 lift=150cfm. "For comparison, a stock set of TC heads flow about 140cfm @ .700 lift". Not knowing anything about it; these numbers sure don't seem like …
LS Cylinder Heads: Shootout and Cam Test - MotorTrend
WebDec 26, 2024 · The SR-71 head demands a 5.700-inch intake valve while the longest stock 429/460 valve is a mere 5.296-inch. Add the roof height change and the numbers come pretty close. This taller intake bowl area … WebThis provides an index that can be used to compare cylinder heads based on flow efficiency. E/I = exhaust flow at same lift ÷ intake flow at same lift. Example: 197 cfm @ … bus ticket to london
Head Flow Numbers Page 4 V-Twin Forum
WebI do a review of the Speedmaster SBC vortec heads with flow numbers and compare the flow numbers to stock and ported 906vortec heads. Show more. WebMar 1, 2024 · With huge flow numbers and an efficient port shape, the GPI CNC ported Gen 5 LT1 / LT4 / L86 offering is truly bolt-on performance! Our LT1 / LT4 / L86 head was developed specifically for the stock displacement LT engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges … WebJan 21, 2010 · All S/B heads flow reasonably close to each other as cast and new. Within a general area of approx 190-200 cfm intake. The prize in heads (S/B) is how far they can go in ported form and how well they balnce out between the intake and exhaust ports. Best as cast flow, in general are the X heads (Big valve) followed by the other letter heads. bus ticket to malawi