Ported vortec heads
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 ... 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 …
Ported vortec heads
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WebSep 1, 2002 · Cylinder heads have benefited tremendously from today's advancements, but there's still something that can be gained from a set of stock heads in the hands of an … WebLARGE-PORT VORTEC BOWTIE HEAD ASSEMBLY Completely assembled, ready to bolt-on Airflow (281 cfm @ 0.600") 225-cc intake ports 77-cc exhaust ports 65-cc combustion …
WebThese heads deliver great throttle response and power from 1,500 to 6,500 RPM. These heads feature the highest quality intake and exhaust valves and valve springs. FEATURES … WebSep 27, 2024 · The Vortec head features a very large boss at the base of the valve guide that measures 0.850-inch in diameter and is used to locate the 1.250-inch outside diameter (O.D.) valve spring. The head uses 0.560-inch I.D. seals mounted directly on the top of the guide. This guide boss is also very tall.
WebNov 2, 2010 · I ported vortec heads for a mild 350 in a car years ago and the motor picked up everywhere. .3 3mph in the 1/8 no other changes I had a combo probably comparible … WebMay 2, 2003 · Ported heads are a wildcard, because there's no telling ahead of time what you'll get, or what it'll cost. Conversely, hot performance engines and headwork go hand in …
WebNov 2, 2010 · The Vortec heads will make 400hp or more out of the box. I've always heard there is no gain in porting them and to leave them alone. C cfm Registered Joined Mar 14, 2003 18,950 Posts #4 · Jul 19, 2010 The big thing is, that they are totally fine to 400-425hp then have issues moving more air for more hp than that.
WebPorting L31 Vortec Heads. In the absence of a flow bench, Vortec heads are about the most goof-proof castings to rework and get good results. Fig 6-12, the stock L31 head is considerably better than the “Fuelie”- style heads we find ourselves working with if factory heads are the order-of the- day. Because of the exceptional casting quality ... diabetic sight lossWebThe vortec 350 is a really good motor with a good ignition system and terrible fueling. The LT1’s of the same era have great fueling and a terrible ignition. It’s going to be expensive but aftermarket intake manifolds exist for the vortec 350 intake bolt pattern on the heads, or just swap heads too while you’re at it. diabetic sides for thanksgiving dinnerWebDec 8, 2003 · 2,521 Posts. #4 · Dec 6, 2003. All I know is that some of the traditional porting techniques can hurt the Vortec's more than help. Just do plenty of homework before … diabetic signs detected in skinWebDetails. Edelbrock part #2913 Super Victor Vortec intake manifold is designed for racers using Vortec cast iron or Edelbrock E-Tec aluminum cylinder heads. This manifold offers the same awesome top-end horsepower, throttle response and advanced design features as Super Victor #2925. Designed specifically to enhance the performance of the Vortec ... cinema hd threadsWebMar 21, 2012 · In the tale of the tape, the cathedral-port heads offered 245cc intake ports, a 2.08/1.60 valve combination and peak flow numbers of 338 cfm on the intake and 237 cfm on the exhaust. The CNC ... diabetic sightWebApr 13, 2015 · The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. The Vortec heads are a little bit lighter than the older … diabetics in australiaWebAug 7, 2014 · L30-230hp/285lb/ft (Vortec 305 059/520 GEN 1E heads and same cam as LT1 iron/L99/L31 iron) Vortec 305's only came with single cats, L31 got dual cats. The LT1 was needed for MY1992, the 1st iron LT1 was needed for MY1994 The 1st L31 was required for 1996, same for LT4. diabetic signs in women