Vortec head porting The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. 1 cylinder heads and achieve cfm flow of 313 cfm! I go over tools and techniques to improve flow numbers. The port on the right will match the Edelbrock 2925 Super Victor intake manifold, which uses the Fel Pro 1206 gasket. I haven't had a 3-angle valve done on these heads yet. What needs to be done to the intake port for your motor is very specific. But you can port them up. These production Vortec heads were used in the new Vortec 350ci engine intended May 2, 2016 · It is not a vortec design head. These are new-not reconditioned. Ported by Lingenfelter's. The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. The truck TBI 350;s were rated at 200-210hp and 300 lb/ft torque, so those Vortec 305 heads aren't that bad comparatively. There are many folk out there porting these Vortec’s in the manner so often shown in YouTube porting videos. 50 exh. Then once fully ported for the bigger valve, flow increases nicely. And it gives the air fuel high velocity and momentum so that it has a lot of energy when it hits the back side of the open valve, because at this point it has May 2, 2003 · Car Craft magazine's technical article on porting GM Iron Vortec cylinder heads. You can see it doesn’t fit the intake port. I know everyone says to leave the vortec heads alone but I have access to a flow bench and plenty of time to either make or ruin this head before I do my other set. Oct 9, 2015 · They do have that "swirl ramp" just like the TBI heads do. In 2019 I ran 10. $1,078. If you are buying new and want a true high perf, high flow high power vortec style head, buy these. 20. Even with the cost of a new intake figured into the equation, a COMPLETE set of aftermarket modified Vortec heads (such as those from Scoggin-Dickey) on a street motor are hard to beat for price/performance per $$$ spent. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks. Shop Cylinder Heads at Summit Racing. This is the first set of heads I've done. 02-2. Complete and assembled. Free Custom Camshaft Cylinder Head Design Form Cylinder Head FAQs Feb 13, 2020 · GM's 706 Vortec heads are the cheapest and most effective heads you can use on your 4. Or use the Edelbrock Etec 170 head. Add To Cart. Where you can gain substantially more power is by concentrating on the exhaust side of the head. there is good comp. Sep 6, 2009 · Use whatever head gaskets you would normally use on a Mark IV block. i will keep looking for that issue though and good luck with your venture into porting vortec heads! BTW. Not the best for performance. 062 Vortec Heads: A Head-To-Head Nov 10, 2005 · The engine power curve peaked at 6,000 rpm with the Vortec Bow-Tie heads. I bought a pair. The internet is flooded with would be head porters showing how they port the SB Chevy Vortec heads. Mar 20, 2019 · For my porting school the two heads I focus the students on are BBC and SBC Vortec. Basic Porting work that anyone can do Part 1 • Vortec Porting - Apr 6, 2018 · The Vortec heads offer great intake port flow despite the rather small 1. Plus BONUS INFO! David Vizard's Vortec video https://www. Its A Merc Marine branded version off a Mercruiser 525SC Supercharged 454 marine engine. you can run a guy . The Vortec 305 L30 was rated at 230hp@4600rpm/285 lb/ft torque@2800rpm. 65@125mph 406 with home ported Dart 215 heads. The Vortec intake port has a big ski-jump to induce swirl. Popular recommendation has been to replace the stock peanut port heads with '96 and newer 454 vortec heads. I comp If we are porting Vortec or aluminum Corvette heads, an exhaust seat with a generous radius under it to blend into the rest of the port is the way to go. Vortec Bowtie cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance. Gasket steel shims to provide reasonable quench. Exhaust seats/ports like this are used on most high-performance aftermarket heads. 25-1 355 ci SBC operating within 2500-6300 RPM range looking north of 450 Horsepower. The oval port are good up to about 6000 or 6500 RPM. The raised intake ports of the vortec heads is one of the things that makes them better. 3 Vortec heads. The vortec heads have no heat ports to the intake runners to operate the EGR. 170 or 180 port 1. Includes bowls and intake opening port match. 90's@120mph on a 400 SBC with a set of Vortec's that used stock size valves, a little chamber work and some mild porting that did not inc. The old (good) ones out of St. Are these good specs for a port and polish job? Dec 5, 2003 · the first couple of pages deal with home porting of vortec heads and might be of some value to you. UnderCover cast iron cylinder head modification, acid porting vortec cylinder heads & manifolds. However, 062 has slightly larger valves than 906 Vortec Heads. They flow 245 cfm intake and 187 cfm on exhaust. cam and stock rocker arms factory appearing is a must, that's why I'm porting Mar 21, 2019 · For my porting school the two heads I focus the students on are BBC and SBC Vortec. Stage II: $550 Our "street/strip" port job - for those on a budget. next time you have access to the later vortec style intake gaskets (even old used ones) and a 1955-85 first generation cylinder head ,or first gen intake gaskets and a vortec cylinder head, take the time to line up the bolt holes on the gasket and cylinder heads, I thing you may be rather amazed at the differences in port size and locations. Vortec 062's 406 w/hyd. You might be wondering if we can do “UnderCover Porting” to your heads? Yes, we can perform our “UnderCover Porting”, or any of our other procedures, to your new our used heads. May 12, 2023 · The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. Taper and blend the iron boss. 3412 stem - A performance flow bench developed raised seat valve job - Hand blended chambers, all work is blasted Oct 26, 2018 · On the vortec heads if you just cut in a valve job for the larger valve say 2. 3L V6 Chevy cast iron truck heads going on my 91 GMC Syclone which came with the "TBI/Swirl port" heads (ugh). If there's photos to be had of sawed-apart L-29 heads, I'd love to see them, too. They provide a good flow and the smaller port (smaller than the rectangular) provides velocity. Apr 14, 2019 · Today’s internet research is a tool as important as your die grinder when it comes to head-porting basics for the novice. 02 1. Our “SST Porting” is for applications where porting the head is allowed and, because of the application, the cylinder head just doesn’t need to be fully 100% ported. AFR LT-1 / LT-4 / Vortec Heads/ Late Model TBI/TPI Heads - Your factory accessory bolts and center bolt valve covers need to be shortened 3/16" or they will bottom out. 02 valve. All the extra prep work and porting required. In this video I will show a quick overview of the porting of vortec cylinder head chambers. 00 to $1,200. Or use a ported 062 or 906 gm vorte head. Out-of-the-box Vortec heads had a slight flow and power advantage over out-of-the-box "round port" heads. Jul 19, 2010 · Just got done porting my vortec 062 heads. Vortec Bowtie Cylinder Head Assembly 19331470 Chevrolet Cylinder Head Small Port. Aug 17, 2017 · Here’s a “vortec” head (96-2000) There are Only two casting numbers 062 and 906. 35" x 1. Use a vortec style intake manifold. The 210cc FASTBURN heads came about around this time as well often compared to the 190cc LT4 head. Includes port match. Chevrolet Performance . This video cuts through the misconceptions that abound on the internet concerning Vortec he Nov 16, 2008 · There was a write up on these heads years ago in Chevy High Performance (the Chevy Thunder advertising insert) but the flow chart was terribly screwed up. May 15, 2015 · As I am a novice porter and I am fixing to start a port job on the Vortec factory heads with the intention of a street/strip project with the basic perimeters of a 10. any of the intake port opening work done, like port matching. -SRH HEAD/MANIFOLD PORTING- -SRH RACING- v2. Apr 13, 2015 · Types of GM Vortec Heads. Jul 25, 2012 · You can fix any lack of flow in the new heads by porting them. The Dart heads had extra material added into the bowl area to allow for seat inserts to be installed for stationary applications etc. Why these two heads? Because they are challenging. 02 without the porting and bowl work, the flow goes DOWN almost 10 cfm. 50" tall causes the top . Stock valves with three angle job on heads and valves are back cut. To me the a small port(185cc or 210cc) Vortec head will make even better Jan 17, 2024 · These Mexican vortec casting flow about 10 cfm less than the Canadian ,062 heads from the 97-2000 era. Whether you’re upgrading an LS1, LS2, LS3, LS7, L92, L99, or the latest LT engines, our selection ensures you get the best performance gains for your build. While 906 and 062 Vortec Heads share some similarities, there are also some notable differences. About 5000--5200 rpm is their upper limit; I'm told porting does wonders. use the felpro 1255 intake gasket. Mar 5, 1999 · The Vortec head uses a venturi built into the port shape to accelerate the air/fuel after it makes the turn toward the valve. 94-inch valves. Chamber size is more like 100 cc than 110 cc. Brzezinski Racing Products Apr 8, 2003 · Chevy Sonoma 2000 4. Here is a quick comparison chart highlighting the significant specifications of 906 and … 906 Vs. Exhaust needs a little help. 05" valves. Dykem Blue https://amzn. If you don’t believe me, just search online for “cylinder-head porting more harm than good” and view the multiple pages of results. By porting I mean removing the casting that shrouds the valves in the bowl and smoothing out the castings in the bowl and runners and polishing the "ski ramps" on the intake guides. 1. A Bare set of our Vortec Bowties include - 1 pair of Vortec Bowtie P/N 19331471 heads - "CNC-Undercover porting" modifications to intake and exhaust ports - Valve guides are sized for a . This essentially blends all of the casting in the head for This port will match the Edelbrock 2814 intake manifold. Feb 1, 1999 · Also included on the chart are four popular aftermarket 23-degree valve-angle heads: GM's late-model 350 "Vortec" LT1 head, Dart's new "Iron Eagle" head, and two Air Flow Research aluminum heads. by having flat top pistons and $500 into a complete set of vortec heads. peace Hog The Vortec Bow-Tie heads are beefed-up Vortec passenger car heads with better air flow, a thicker deck, both center-bolt and outside valve cover bolt patterns and the Vortec and conventional intake manifold bolt patterns. 00. Other castings) then you're not comparing apples to apples here. Jun 18, 2003 · Dutch, I'm not familiar with the "vortec" BB heads, however, the BB heads, oval port, come in two port sizes. 35". youtube. 94 or 2. Stage I PM: $300 Our "street" port job - a minimum recommended porting stage. Used-ebay second hand Vortec heads MUST be checked for cracks. With over 50 years of fl Apr 3, 2020 · 10. So do I have to get a special chip made to "eliminate" the EGR from the computer, or what? Jan 1, 2003 · In essence, the Vortec head uses the iron LT1 chamber intake and exhaust ports in a standard-water-flow iron head. Vortec Heads outflow Bow Tie Heads right out of the box and are a 20 to 40 horsepower bolt-on increase over earlier cast iron small block heads. You can easily mess up the already good intake port. Mar 18, 2009 · David Vizard's 1999 book about building small-block Chevy engines on a budget has a section on the Vortec heads. Any other casting numbers are not a “vortec” head. let me know how it goes i was thinking of ported vortec heads to replace my stockers. I've got about 15-20 hours into them. He agrees that the stock intake port is hard to improve on, but he also says the exhaust port needs a different treatment from what's normally done on a non-Vortec head. Instead of porting a set of L31 heads, I would get into a set of CPP smallport Bowties. I happen to know there is a Weiand 177 blower with the BBC intake manifold for sale here. Any suggestions would be greatly appreciated. I gasket matched the intake ports and blended them to the existing runner radius at the ports. There's been SBC heads with "D" shaped ports, oval shaped, or the stock shape and unless you plan to spend some money on a set of custom headers to match the shape of the exhaust port standard headers work just fine. 300 opening Fel Pro 90131 200cc runner Aug 27, 2003 · yes i am 100% on putting 2. nicely just the same. Oct 22, 2007 · Unless you're comparing NEW heads to NEW heads (Vortec vs. Think, torque, velocity, air speed and pressure management and mid lift flow on these heads. Nov 1, 2005 · I can do a set of heads as described in about 8 hours - 4 hours per head. 64 valves on the vortec heads, machine . 020" off the heads 0 deck the block and just knock off the pointed edges in the ports and polish all the way through my legacy weighs just over 2700 lbs and runs 6. If you want a standard port and intake patern head that can be modded and ported to work like a vortec head, use the Apr 6, 2017 · The current GMPP "aftermarket" cast iron 062 Vortec head also has its exhaust ports raised relative to the header bolt holes. 2's in in the 1/8th 373 gears turbo 400 trans. They did not share the same clean cast port quality. Catharines flowed 228cfm with a radius inlet on the port and the OEM valves. Depending on the condition and type of cylinder head, “UnderCover Porting” to 1 bare pair of small-block Chevy casting runs from $795. They all improve a lot with full porting and 2. The 391 hp average peak achieved with the small-port heads included the engine equipped with the single-plane Vortec intake Jul 24, 2018 · Chevrolet Performance 19331470 - Bow Tie Small Port Cast Iron Vortec Cylinder Head, 185cc Intake Ports $1,078. The worst thing to do is try and completely reshape the ports. 10 sec. Precision Race Components (PRC) offers cylinder heads and porting services that enhance power output and engine responsiveness. Acid Porting uses chemical treatments to enlarge the intake ports, which maximizes air flow & increases intake volume, while maintaining a stock appearance. 8-liter and any difference between it and the 706 head goes away. Intro video to a video series of comparing Stock, Ported and Big valve Vortec heads to aftermarket heads! Videos to follow Vortec heads vs Aftermarket heads! Sep 14, 2008 · Concentrate your porting on the exhaust port. True oval ports are still rather large and are perfect for a street hot rod. Spend your time and energy getting the all the areas of the port to blend so it looks like a continuous smooth flowing port instead of a piece of machined cast iron with a distinct port entry, runner, bowl and Mar 21, 2019 · One guy just polished up a 4 cylinder 16 valve head - his thread has over a million views and over 1800 praising comments by followers who mostly think porting means it's polished and that does the job!!! But that aside after I found one video that gave pretty much all the moves to achieve close to zero I searched for more Vortec porting stuff. I used Mr. com/watch?v=d Nov 24, 2009 · For the Vortec heads there's not much merit in "port matching" the entrance to the port is not the restriction, the pushrod pinch is, and the short side and the bowl need the most work. Jun 27, 2012 · It don't matter any what shape they are, it's effect on flow isn't enough to even worry about, especially in a street application. PrePlanning Reiterating, the internet is a valuable tool for the novice. Mar 16, 2021 · Part 2 Its very easy to "over port" vortec heads Watch this video for tips and tricks to get your vortec to flow better. Enlarge the area around the pushrod, smooth out the short side, and clean up the bowl. SST Head Porting. Fit the gaskets to the BLOCK, not the head. Vortec heads (and most others) like straight stemmed valves. 94 int and 1. Minumal porting increases flow, too much increase in port size or loss of the benefits of the shape of the stock port will decrease efficiency. 120"-. They are not as good as the RHS or EQ heads that were made 5-6 years ago. to/2NCVXMs We are #1 in Cylinder Heads since 1980. Summit Racing SpeedCard - learn how to get 15% back up to $150 Dec 18, 2015 · Don't waste time with the Dart S/R vortec heads either. If you can figure out Google Books, it's on page 87. The conclusion was that swapping from peanut port to Vortec heads provided modest power gains. (Pre-Vortec stock size was approx 1. Dec 27, 2014 · I have a gen v 454. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. If you want a good aftermarket vortec h Aead use the RHS 906 torker (vortec) head. These upgraded production cylinder heads are ideal for 400-450 horsepower street and racing (great for circle track applications) engines. Mar 7, 2005 · "Bowl blend" and shortened guide in port also improves flow. 150" of the port to be blocked off. This head has been redrilled for earlier intake manifold to bolt up. 2004 new OEM Vortec 4. Apr 19, 2023 · In this video I port a stock set of Vortec 8. If you want more power with less work this video, by international head specialist David Vizard, is just what you are looking for. . Some diy Port flow improvements for my SBC heads & a few of my porting tips. Dec 4, 2020 · The Vortec (L29) heads have a bigass ski-jump in the port, just like the crappy TBI small-block "swirl port" heads. A stock Vortec Bow-Tie head will flow 234 cfm intake and 151 on the exhaust. Jan 2, 2024 · I will say it's the best GM production SBC ever made. Introducing Davids approach to producing the Vortec "Super port". ) The Vortec Heads come with various intake and exhaust valve sizes to complement the high-velocity port design and your performance needs. There is a reason why the new heads are so cheap. The L30 Vortec 305 heads with have the 059 or 520 last 3 digits of the casting number. A SBC Vortec head is one of the best stock casting torque generators. Using gaskets less than 1. Stage III: $850 Our "strip" port job - the best bang for the buck. This creates low pressure behind it, drawing more air/fuel. Again, porting (unless you do it Dec 30, 2021 · By the time you have played the head swap + shaving down the heads machining costs all in you are not that far off dropping a blower on it. Most give very poor to even negative advice. Aug 26, 2014 · The new most recent GMPP Bowtie big port/ and small port Vortecs are way ahead of the game. Feb 14, 2010 · Short turn has been widened on intake picked up 10 cfm. . Here race e A COMPLETE set New, New Chevy Vortec heads of “CNC-UnderCover Ported” with the above listed “CNC-UnderCover Porting” modifications, machined for screw-in studs, 11/32″ stainless valves, springs for a flat tapped or hydraulic cam, spring locators, steel retainers, machined valve locks, surfaced with a flat cut for your compression rule Aug 7, 2014 · The LT1 was needed for MY1992, the 1st iron LT1 was needed for MY1994 The 1st L31 was required for 1996, same for LT4. 240 x 2. The Edelbrock 2814 intake is used on the raised runner Vortec Bow-Tie heads. 10GM/Vortec Pictures GM #25534351 2. -jay Free Shipping - Chevrolet Performance Vortec Large Port Bowtie Cylinder Heads with qualifying orders of $109. email with details or questions. 10in² MIN 68cc chamber 1. cqcvx jpf otq tgz xszlqu yaaedqzb fkwq bqwxj zrga ireukjk
Vortec head porting. All the extra prep work and porting required.
