WebApr 29, 2024 · theres several different intake gasket sets available but the standard first gen intake gaskets about like the #1205 and place that gasket on the vorteck style heads and youll see the ports won,t seal as the vortec ports are taller than the intake gaskets with the bolt holes properly aligned WebOct 16, 2006 · The aluminum vette heads come in two castings, the early '86-'87 #128 and the '88-up #113. The early heads used a standard exhaust port, while the 113 head used the 'D' port design which is raised .100" for improved port flow. The GM L-31 truck Vortec heads flow quite a bit more air than the vette heads and consequently make considerably more ...
Dyno Testing The TPI Chevy Small-Block Engine - MotorTrend
WebNov 5, 2024 · The entire video is chocked full of good information but the things that catch my interest is about the 30 degree valve seats instead of 45. Full radius in the valve job or … WebSep 24, 2010 · Based on what others are saying, production vortec heads flow ~220 cfm on the intake side, with proper porting they can exceed 260 cfm. Gains we see at the drag strip are in line with this. 1 - 12 of 12 Posts This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread. litle hope fix стим
Street-Style Vortec Head Test - Tech Article - MotorTrend
WebAug 9, 2015 · Anyone running GM Vortec Bowtie small port heads part#25534421? Im building a 383 and its time to choose what heads to use. They seem to flow pretty well, and accept up to .530 lift Around $490 each complete. Please look at the numbers and tell me what you think. Flow Numbers intake: SMALL-PORT HEAD Lift CFM 0.100 67 0.200 136 … WebOct 1, 2005 · We also found that the intake valve in the Vortec head is 2.060 inches in diameter, and the exhaust is 1.72 inches, which is small for a 454ci engine. We took the heads to Superior Automotive... WebVortec Bowtie cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance. These upgraded production cylinder heads are ideal for 400-450 horsepower street and racing (great for circle track … litle half chick wonders