Vortec 454 heads I'm assuming it's 60-70 and the traditional pattern. A freshened up (rings, bearings, valvejob, gasket set) Vortec is a good replacement for an original 396 or 454 hyd cam motor car with a stock converter and high gears. It has 9. Oct 8, 2004 · I'm runnin the LT4 springs on my Vortec heads with a smaller . Those springs dropped right in without any machining on the pockets or towers. I purchased a good running 2000 GMC 3500 to use as a donor vehicle. Chevrolet did an admirable job through the mid-1960s by continuously refining and revising the heads, as displacement, horsepower, and torque all Sep 18, 2010 · Hey guys low buck rebuild here. 4L/454 Chevy big block Gen VI Cylinder Heads and get Trick Flow Makes Serious Horsepower! 1-330-630-1555 • 1-888-841-6556. 5 compression Comp hyd roller 232@050 578 lift 106 lc Edelbrock aluminum heads, 2. I am looking for a head that can realistically make power up to 6000 rpm and with flat top pistons, a combustion chamber less 100 cc is high on my priority list. 89 valves, BG 850 double pumper, Air gap intake, Jeep steering box, hydroboost, 4 wheel disc brakes Cylinder Head, Performer RPM 454-O High-Compression, Aluminum, Assembled, 100cc Chamber, Chevy, Big Block, Each. Part Number: VRE-2CC5. Thread starter BNielsen; This is a great leap, as you have to pull the heads and have the valve stem guides machined down. Apr 30, 2004 · I have a running 454 Mk IV with Gen VI heads in my boat. I love em ole trucks. Going in a 69 c10. Apr 1, 2021 · The Vortec small blocks are the engines notorious for intake gasket leaks. Now, lifters, cam, distributor, injectors, FPR. Just got it fired, haven't done performance testing yet. 4:1 compression ratio, and a long runner multi-port fuel injection system. weak areas on high-mile examples. Rocker Arms. Nov 4, 2022 · I made a few posts on my 454 rebuild and hop-up in the general vortec thread that really should be in a new thread, so here it is. Right? Wrong? May 28, 2013 · Guys, I'd like to know if the Vortec 454 offers a much better performance over the normal older head like the case of the old 350 Vortec head out performs gigantically its older non-vortec counterpart. Find CHEVROLET 7. Bare L29 Vortec BB Chevrolet Cast Iron Cylinder Heads. I also found some comp cams with 115 and 116 LSA, from what I've read higher LSA is good for EFI tuning and a smooth idle, but will it have adverse affects on power? Dec 5, 2010 · You can use heads off a later vortec 454. . I have not purchased a cam yet. 1L L18 engine was used from 2000 thru 2008 GM in the HD trucks. 4/454 from a rolled suburban to rebuild and swap in. I only want 5000-5200 rpm capability, but honestly, going there will be rare. It was upgraded with a hydraulic roller camshaft, revised cylinder heads, 9. Jul 7, 2003 · The benefit of this conversion is to use the tiny-chamber L-29 Vortec heads on all those old 8 to 1 compression pickup truck 454s. 4 Vortec) big-block V8, and was the gasoline alternative to the larger Duramax LB7 diesel Jul 30, 2018 · I have a 97 Vortec 454 I'm rebuilding for my cruiser. 4L/454 Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing SpeedCard - learn how to get 15% back up to $150. 7L Vortec heads were the "hot tip" for small-blocks. Cylinder Head, Vortec, Assembled, Cast Iron, 64cc Chamber, 170cc Intake Runner, Chevy, Small Block, Each. Dec 30, 2021 · If your 454 has the dished or the flat top pistons that is going to be the cork in getting to where you want to be at with any of these heads. Nov 10, 2005 · Super Chevy tech article on Vortec cylinder heads. Is it logical to knock a little of the vane down a bit in search of flow at the sacrifice of swirl, or leave it. The engine ran very well but it was very very slow. Jan 20, 2009 · I am trying to finish off the top end of my Gen VI 454. The conclusion was that swapping from peanut port to Vortec heads provided modest power gains. After reading every post I could find on the net about the 10141279 Vortec heads I have decided that they will not be used on this build. There is no head for a 23 degree smallblock which is more technologically advanced in terms of flow management and combustion management than the vortec. com. Flow is worse than older generation "peanut port" small oval port truck heads. They were not the big improvement that the Vortec small-block heads were. Much better in all respects. Aug 24, 2021 · I made a few posts on my 454 rebuild and hop-up in the general vortec thread that really should be in a new thread, so here it is. 3. Shouldn't have any problems with the block there. Nov 30, 2010 · CAN I BOLT VORTEC HEADS AND INTAKE FROM A 1999 GMC 454 TO A 1986 454 BLOCK . Apr 29, 2012 · Hello BBC experts, and thanks for your help! I have a gen 6 454 in my truck. Good to . Feb 8, 2018 · The Vortec 454 heads (L29) are swirl port heads, with part of the intake port and valve bowl blocked off , so not really suited for any kind of performance build. These engines were rated about 275-290 HP and about 390-410lb/ft. Oil Pans & Accessories. More cylinder head choices, cam choices, aftermarket efi, headers fit better, coil near plugs kits available, and if I really wanted I could do forged rotating assembly much cheaper than the 8. Find 1998 CHEVROLET 7. 0 inch stroke. The vortec heads have no heat ports to the intake runners to operate the EGR. For the valve train, it uses an old school overhead valve (OHV) design with pushrods, and has two-valves per cylinder. 0 to 1. Dear Old Dad departed a few years ago. Whether you're tearing up the track or embarking on a Sep 14, 2015 · The L29 454 was originally rated at 290 hp and 440 lb-ft of torque thanks to a combination of fuel injection, large oval-port heads (to replace the peanut ports used in the previous Gen V motors) and a slightly higher static compression ratio. If there's photos to be had of sawed-apart L-29 heads, I'd love to see them, too. 040 in. I have a $600 budget. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Aug 9, 2010 · Are Vortec 454 heads better than the older 454 heads? Or is that just true for the small blocks? I am thinking that I heard the Vortec 454 heads aren't any better but I cant remember for sure. Does your 454 have flat tops like the L2377 piston or a oem piston with a slight dish top. Jul 14, 2009 · TC Member # 4431 '67 Chevrolet Biscayne- SS427 L-36/TH400, '67 Hell Camino-BB 427/TH400 , '66 300 Deluxe 2 door-230/PG "Good people sleep peacefully in their beds at night only because rough men stand ready to do violence on their behalf. 4 L (454 cid) V8 was a truck version of the engine. Dec 2, 2021 · 454 Vortec heads w fresh CNC Machined seats & bowls opened. Oct 1, 2005 · The last generation big-block by GM (Vortec 454) leaves much to be desired when it comes to output. Head Gaskets & Bolts. 5:1 compression with the stock l29 vortec heads, which are stock but have an adjustable valvetrain conversion and roller rockers. Dec 17, 2007 · 69 elCamino 454 10. Part Number: NAL-10141280. The big blocks -somewhat- known for it. The 049/781 large chamber heads in particular want the small dome 454 pistons to get the cr up in the ball park. I've had a couple of sets of semi-closed chamber heads from the Gen 6 engines, they're nearly identical to the old -290, -215 and -063 heads that a lot of folks are using with great success on the Mark IV engines. Would I be better off with a older motor to start with vs this one? Thanks Vortec 454, stock heads, but idk what the stock lift limits are. * casting # : 12560241 / 10141279 * Description : Stock Oval Port , Closed Chamber Vortec 7. Apr 17, 2006 · A flat-top pistoned BB 454/468 will only be like 8 to 8. Symmetrical Rat: A Feb 3, 2020 · Well I took to long to buy the gen v 454 and lost it. However, on the 1996–2000 7. Part Number: EDL-60435 3. That’s because the OEM “black box” 454 Vortec powertrain control module (PCM) is not tunable. They have a 100cc chamber which will maintain your compression ratio. 4L/454 Chevy big block Gen VI Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Get the best deals for 454 Heads at eBay. Jun 18, 2023 · Getting rid of the factory tune is almost always a great way to free up some extra horsepower and torque and gain some fuel economy. I got about 200 RPM more out of the engine than with the original heads, but I changed everything from the head gaskets up. The 8. Small 99cc combustion chambers allow the compression ratio to be raised one full point over most stock 119cc chambers & large oval ports flow better than other factory oval port Find CHEVROLET 7. 4L / 454 Cylinder Head Assembly's. Oct 5, 2020 · The Official Vortec 454 Info thread. 0/1 CR, roller cam and broad powerband from idle to 5000, then the 454 Vortec is the way to go. My 97 K3500 extended cab dually has 230,000 hard miles, so I bought a L29 7. Part Number: NAL-12691728. by wanting to keep your current injection system you will be limited to what mods you can do. The cylinder heads are unique to the L29/L21, featuring small oval ports with a swirl inducing “ski Aug 7, 2010 · The stock Vortec 7400 heads are net lash- to do much w/them the first thing that would be needed is to swap out the studs and lock nuts for adjustable ones. I know it has a roller cam which is a plus, but can I make good power with the stock heads? I'm still looking for 500hp to 500ft pounds of tourqe. GM built the engine from the smaller 454-cid (7. One area the 454 Vortec sorely lacks in is fuel economy, but that’s somewhat expected from a Chevy big block. Just driving without anything being towed is typically about 14-15 mpg highway and 11-12 mpg in the city. 0:1. Dec 27, 2014 · Popular recommendation has been to replace the stock peanut port heads with '96 and newer 454 vortec heads. 4L/454 Chevy big block Gen V Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing SpeedCard - learn how to get 15% back up to $150 Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Aug 31, 2009 · Are there any pistons besides the flat tops and dished that have a small dome that can be used with the 100cc L29 Vortec 454 heads? I know the "vane" may need to be trimmed, I am "thinking" a small amount (less than . It allegedly had under 20k miles, and was in storage for about 15 years. 041-inch thick head gasket on a 350ci engine, the Vortec head will bump the compression to around 9. My question pertains to the stock conical valvesprings. 9-8. The truck is used mainly for work/towing but I also plan to race it some too. . I bought a pair. Jul 19, 2023 · Chevy’s Gen VI, Vortec 7400 L29 7. " Gen 6 heads on a Mark IV block is not a coolant leaker. Feb 1, 2023 · Call it what you will, the 8100 was the result of GM bumping the Vortec 7400/454's 4. Oct 3, 2006 · You should be able to sell those Vortec heads, they're very good for torque engines, much better than the old peanut heads. Sep 27, 2023 · This is a SET of Rebuilt OE Stock VORTEC GEN VI 7. Low compression 454 can make really good power, even with stock heads. The chamber may or may not hit domed pistons. This head can be mildly ported and milled up to 0. 4L/L29 cylinder heads being the "hot tip" for big-blocks the same way the 5. I don't know how much of the improvement was due to the heads alone. Jan 18, 2015 · Pretty much all your standard 454s are going to have a 4. 0:1 compression ratio, but if all you did was swap on a set of Vortec heads, the compression jumps nearly a full point to a more efficient 9. 4L 454 engines. Any short deck, big-block intake should bolt right up to the vortec heads as long as they haven't been milled down excessively, so intake is good, too. Both Vortec 7400 heads (the '98-'01 12560241 and the '96-'01 10141279) are about 100cc, as a comparison. Intake Manifolds & Components. 37, thanks to longer connecting rods and a block with taller decks. I do have some used ARP head bolts I can use but was saving for another build. Condolences. 050 from coil bind (allows for about . The same deal as converting all the old small blocks to Vortec heads! These L-29 big block heads have the BIG oval ports, a modern heart-shaped 100 cc or so combustion chamber that would work great with flattops. I have 781s now, would like to switch to fuel injection and possibly some better heads if the Vortecs ARE better. The Vortec 7400 was basically a 454 big block with a hydraulic roller camshaft and lifters, as well as parts more suitable for use in light-duty trucks and more advanced Nov 16, 2011 · Budget and aluminum heads aren't usually in the same sentence. 0 to a beautiful 9. Sep 6, 2009 · Old thread, but it suits my questions. I dropped L29 heads onto the 454 in my boat. Jan 9, 2008 · the vortec heads are actually a very nice head design and will probably out perform the 049 in your application. 060 inches in diameter, and the Oct 2, 2022 · Vortec MPG. The vane is really steep in the last 3/4" or so, about same angle as valve stem. "-George Orwell One standout feature of this cylinder head is its compatibility with the 279 BBC heads and 454 Vortec heads. Mar 6, 2017 · I have a Mark IV 454 in my '79 truck and adding the L-29 heads will bump the compression up from a dismal 7. ; I just need to figure out what I am going to do for the heads. 00-inch stroke to 4. 049's would be a good head but have 119cc chambers which will kill your CR unless you add domed pistons. Sep 27, 2017 · That creates an 8. They're quite acceptable for general run-around, daily-driver use. There is NO plug kit OR "special" gasket needed "to prevent coolant leaks into the lifter galley. Engineered to deliver maximum airflow and combustion efficiency, these Vortec Heads are optimized to enhance engine performance and deliver an exhilarating driving experience. Introduced in 1996, it was produced for five years, until replaced by the Vortec 8100. Not Yet Reviewed. also please let me know where and how expensive these heads could be found, in stock 427/454 Bare Block; 502 Mark IV/Gen VI; Bare Block; Bowtie Sportsman Blocks. Categories; Contact Us;. Apr 22, 2024 · «ÿÿ¨ªªªþï P‡»¤uU„{§©†ªÚî 9 ‘[tEdF§Ge-ñ ÔÍÄÌ4]MÕJUÍ=#£¡ ÿp{§ xsùçcùÿ[oñ¿Ö ª¬ývZ› ‰D"‘Hä§*‰µÈ’%##GŽ¼^¦{î{Vßǽü¿ Ͻ;#I’`ÎÞÿ˜ ž = ýñòî÷Û7ЇAŸÿðì¬ ƒ -M·ŒÐDç?œõ(›ógg u/ Ç°Œ¦Ð’2‚“ógg F ¸Œv ÷£u!‚Úš€&,£½jB¿lp§j${Õ„> eTPR _K K nø[µ2[p¨—ÑèP[ÙDÐ;l—ÑÉ¥5 M8ykMð'W Many aftermarket heads, such as this Edelbrock Performer RPM 454-R, are rectangular port aluminum with open combustion chambers, similar to the fabled LS6/LS7 production heads. L-29 heads on a 4500-5000 rpm tow rig, small dish flat top formerly peanut head '88 454, mild cam. Cyl Head, CHEV 454 91-95 CYL HEAD. Dec 4, 2020 · Out-of-the-box Vortec heads had a slight flow and power advantage over out-of-the-box "round port" heads. 1. I already have springs, guideplates, etc. of torque. , The L-29, Vortec heads were meant to replace truck heads like the little-bitty, -236's peanut port heads at 200 cc's or so and which generally had 118 cc chambers which they did great. Save Share Reply Quote Like. 5 to 1 CR b/c of the larger chambers. 530 valve lift) Jul 30, 2018 · I have a 97 Vortec 454 I'm rebuilding for my cruiser. IIRC the Gen VI will accept MK IV heads. Big block vortec heads aren't different like vortec small block heads and intakes will interchange. Feb 20, 2020 · I read an article in one of the hot-roddy magazines (Chevy High Performance, I think) about the Vortec 7. 25 out of 5 stars 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. (Photo Courtesy Edelbrock) Modern competition heads usually have heart-shaped combustion chambers to minimize chamber volume and increase the quench area. 4 Vortec, this presents a problem. At Nov 17, 2011 · I will decide on the appropriate rear gear after the 454 is running. I was just planning on just a K&N Intake, Hooker Headers with full exhaust, tuning, a shift kit and removing all of the emissions equipment but I have decided to throw on some heads and Jun 13, 2019 · Thats why I'm looking into the vortec 454 as well. 6759 posts Mar 5, 1999 · The vortec head was designed by the same guys that did the LT1 and LT4, one of which was a former GM winston cup head engineer for over 10 years, he's back at GM Racing doing race heads again. Towing reduces that considerably, to about 8-9 mpg for a decent load, and even less for larger ones. pdq67 PS. Will reusing GM head bolts be fine? Just wondering what the torque spec is for vortec heads. Very disappointing. inch engines and were developed for better torque. I don't think I've seen hardly any reference at all to people having to do head gaskets on them. Unported Vortec heads are turds for genuine performance. Mk IV heads on a Gen 5/6 block is the problem child. 25 & 1. These were 496 cu. Dec 13, 2024 · Suitable for towing, the Chevrolet Performance Big Block Chevy L29 Vortec Cast Iron Cylinder Head was used on 1996-2000 GM trucks/vans/SUVs with 7. If you could find some rebuilt on the cheap you'd be money ahead and reach your goals pretty easy. 1:1 compression ratio. With a common, four-eyebrow flat top piston and a . Apr 14, 2024 · The L29 is considered the Gen 6 big block, with 4 bolt mains and a 1 piece rear-main seal. We also found that the intake valve in the Vortec head is 2. the semi closed chamber of the vortec increases your compression ratio and the 049s will drop it sacrificing alot of potential power. 530 valve lift) Dec 20, 2005 · But, if someone wants a reliable, cost effective, torque motor, c/w streetable 9. Now I found a gen vi 454 vortec. Aug 5, 2009 · Vortec heads are a bolt-on minor upgrade to UNPORTED round-port heads. Assembled with premium parts, the JEGS Vortec Head fits all 1955-Present GM small blocks except LT1, LT4, and LS1-style engines. 100") can't hurt much. Hell, no. 0 out of 5 stars May 10, 2005 · I have a set of Vortec L-29 heads on my Mk IV 454 boat engine. Good luck with the '51 P/U. Sep 23, 2016 · I assume when you say a late 90's 7400 454 Chevy engine you are talking about the VORTEC MPFI engine used from about 1996 to 1999. Aug 21, 2007 · I'm looking for a good set of heads and a cam for my Vortec 454 powered Silverado. and requires a Vortec-style intake manifold; modifying the head to accept an early intake manifold is not recommended. 454 lift cam. 525 lift. 5:1 depending upon the deck height. 4L / 454 Cylinder Heads 1996-2000 * information : combustion chamber : 100cc May 20, 2023 · Both the block and cylinder heads are cast iron, and it has a 9. My big concern is the potential edge of the head chamber to piston dome interference. 68Chevele. I'm using the original head bolts, and new intake bolts. They are testing at 95lbs seat pressure, and 240-250 lbs at . 250 bore size and 4. xknxdv gdse eniqi aqeyf orai postk vlnqh hflgjy byssx wdh