5 CR, RPM Performer intake, Quadrajet carb and block hugger headers. 525 lift, heads, rocker arms, head gaskets, intake gaskets, edelbrock performer RPM air gap manifold, manifold bolts and head bolts. These springs increase the amount of available valve lift from 0. 150" lift to. Mine was borderline at. 550 lift, Crane gold rockers 1. See Dyno Chart. 550 inch with no machining required. This produces a high reving cylinder head that can handle up to 0. better flow numbers even at lower max lift numbers. Going a step further, if you look at the average flow from about. HR-9299-8-CSR SBC 377-390 CID E-210 and Victor 215cc Head Max Power 6000 rpm Peak torque 3500. 550" lift with a hydraulic camshaft. 525 lift with 1. Maximum valve lift on Vortec cylinder heads is. 510-inch exhaust valve lift. The engine's displacement size measures 5012 cubic centimeters, 305 cubic inches or 5 liters. The heads provide outstanding low-lift flow numbers (the more air you flow, the more potential power) and Fast Burn performance all in an affordable, cast-iron head. this is the most important lift areas related to power production. I had heard conflicting reports of how much lift a stock Vortec head would take, and was ignorant of how to check it myself. 500's but im not a 100% on that. The stock valvesprings are weak. Conclusions. 6 roller rockers, Ed Wright (FastChips. Find Chevrolet Performance Vortec Cylinder Heads 12558060 and get Free Shipping on Orders Over $99 at Summit Racing! These cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 HP increase over earlier cast iron small block heads. 5 CR, RPM Performer intake, Quadrajet carb and block hugger headers. I understand from what I found on the WEB that it has vortec heads with 100cc combustion chambers and are nice heads up to 5000 rpm. Vortec heads are not permitted. 4-205 5-165. 550" lift with a hydraulic camshaft. Otherwise, I am going with stock 083 L98 heads, which I will still end up at about $500 when they are done. The cam in the TBI engine is just plain AWFUL. I starting looking at new cams. 60 rwhp gain is a very noticable improvement. 460 lift, the heads will be fine. The bigger the lift is typically the bigger the lope. Of course, I had to change the springs too, (stock vortec springs are pretty weak, even though they were roller cam springs) so that was another expense. 550" valvespring and is clearanced for high lift cams. Precision Race Components 227 cc. Our site promotes a huge variety of items in stock right now on the web. 5) which would likely allow this much lift to be used with the stock vortecs? i just want to slap the vortecs on after a possible pocket port job, but i like the idea of not having. With a true 58cc casting such as the EQ Magnum or Edelbrock Performer RPM heads you’ll be in the vicinity of 9. 050? cam lift) are usually considered best for stock unmodified engines and those with computerized engine controls. 60 rwhp gain is a very noticable improvement. The aftermarket is also rife with all kinds of Ford parts, and the 351W is one of those parts you can find all over the internet. this is the most important lift areas related to power production. Your idea would be replicating what a dual pattern cam achieves and is a very common choice for vortec heads cam wise. Grind # HR-9299-8-CSR SBC 377-390 CID E-210 and Victor 215cc Head Max Power 6000 rpm Peak torque 3500. 550 inch with no machining required. This cam is a lot like the X303, but even more extreme. The cam is based on the maximum lift for stock vortec heads and is a single pattern 215D/470L on a 112 center. If the you feel the length is a problem I did a set of Vortec heads wit stock length valves ( stainless aftermarkrt) and. 7 rockers would make the stock l69 cam pull a. 7L guys who are looking for an aggressive, high end camshaft can expect to rip up the road with this one. This makes very good power on a vortec 350 as. 6 roller rockers (havent calculated lift yet) comp xe268h cam 224/230 @. The great flow characteristics of the Vortec heads with high performance valve springs is the perfect way to top off your new street/strip engine. There are bigger cams but they get really temperamental on the street and are made for pure drag racing. Factory valve springs are designed to work with stock, low lift camshafts, and since most aftermarket cams have higher lift, the springs must be replaced with compatible components. Replacing the stock heads is the second best mod you can make, next to the exhaust work. 0L Brian Tooley Camshaft LS3 NA Engines Stage III 229/244. 355 sbc block with (from what i know) stock rods. Click the button below to add the SBC Z28 Valve Springs, Drop in Fit,. Yuauto 2 Pack Vortec Max Door Emblem Logo, Badge Plate Band Decal for Chevrolet 06-09 Silverado Sierra SS 6. This cam delivers 216°/232° degrees of duration with. 614 Lift LUNATI VOODOO 20540715 CAMSHAFT VALVE SPRING KIT GM VORTEC LS LS1 5. Chevy Big Block V8. 500ish' max lift???? i know the vortecs flow good till about then. 480 is the max lift on a stock vortec head is because the valve spring retainer will come in contact with the valve guide (first crushing the seal). 6 roller rockers a nitrous cam w 470/490 lift a set of forged flattop pistons 373 gears th 350 w 3800 stall shorty headers with true duals and race magnums i drive it all the time it runs 9. Buy W Base on eBay now! Marine Stroker 6. This will require fly cut, or custom, pistons when using a camshaft with higher lift values. com makes a spring and retainer kit that allows for. I am running a 377cid. Ricardo, this is such an open question it is difficult to provide a solid answer. BluePrint BP3830CT1 GM 383 Base Engine, Vortec Heads, Flat Tappet Cam 350 Chevy Small Block V8, 383 Chevy Small Block V8, 383 cu. A STOCK vortec head has very impressive low and mid lift flow numbers. A 55cc chamber on a stock head gasket would be around 12. Once you go beyond 210 to 220 degrees of duration, intake vacuum starts to drop. 3L Vortec, the LM7, produced 270 horsepower and 315 lb-ft of torque. The GM cam is used in both the high torque 383 engine and also the Ramjet 350, and is very similar to my stock impala cam. Anything more and I would have had to cut the valve guides down. 050″ tappet lift (intake/exhaust) is 165/175; and maximum lift with 1. I want a little more horsepower out of it. Beehive springs require no machine work. 550 valve lift before coil bind (stock limits were. Re: Let's hear about your DYNO PROVEN power combos This was a fun one Small block Chevy, 304" endurance engine Bore & stroke 4. This cam delivers 216°/232° degrees of duration with. Great street heads,but if you are looking for a 6-7000 rpm head I would probably shop for something with a bigger runner. I want something that will give me a. One of the issues with these heads are that valve lift is severly limited. Toggle Navigation. 7L Vortec cylinder head is the best flowing production head Chevy has made for the Gen I SBC engine to date. The original 5. Number 2 is they are 305 vortec heads (059 casting) so they are 56 or 58 cc chamber. 74 inches by 3. NEW PAIR Chrysler Mopar PROCOMP ALUMINUM 318 340 360 PERFORMANCE CYLINDER HEADS LA STYLE FITS YEARS 67-91 (LA STYLE MEANS Carbureted) NO RETURN CORE REQUIRED. Anything over that and you will have problems. 7L LS Vortec engines are fully CNC-machined to significantly increase the performance of GM cars and trucks. Lunati's 343 hp 305 Build-up. I would check and make sure the stock springs will handle it. The problem is that the Vortec valves do not have an O-ring groove on the valve stems. com Search Watch Contact GM Vortec Valve Spring Beehive Conversion Kit. 5 compression, solid flat tappet camshaft make 485hp with valve jobed stock vortec heads, when switched to 230cc Dart Iron Eagle non platinums made 515hp but the vortecs dropped like a rock after 6300rpm but the 230cc went to 8000rpm. I have the stock 1. 7L vortec engine complete and runnig with the 64cc heads. These are extremely versatile camshafts with a big cam idle, but a reasonable RPM range (3,750rpm and up) for a higher RPM race build. The results will shock you so be sure to read our Vortec 5. Sierra Classic Vortec Max. 0 Gm Truck 6. im not wanting to change heads, wanting to know the stock numbers of cam lift and durationand also the most i can go in lift and duration without valve and piston problems. Stock Rocker vs Roller Rocker Introduction to Finite Elements December 2003 Calculation 1 Spring Load Calculations. I may just run the 290HP heads with the stock push rods, 450 lift cam, self aligned non roller rocker arms and just let it go. I used to get Vortec 906 castings for chebbys and has numerous castings fail, that they had "fixed". Below we list our best selling street/race applications. Raylar Performance Parts FAQ Raylar Cylinder Heads Why are Raylar's aluminum cylinder heads better than stock or aftermarket iron cylinder heads? Cast iron heads are designed with cost as the number one priority. More info on them can be seen at Vortec L31 cylinder head. 525 even with beehive valve springs. Here is RHS. 6 rocker ratio Stock Valve train: 100 pounds of seat pressure on valve , 427 pounds per inch spring rate. I got a '78 chevy k10 4x4 4 speed 31" tires and 3. Shop R302h Mfg Vortec Lt1 today online! Highlighting our robust group of r302h mfg vortec lt1 in stock now!. since they used cams with lift in excess of the max. 150" lift to. 7L LS Vortec engines are fully CNC-machined to significantly increase the performance of GM cars and trucks. 500-inch range, the Vortec heads require modifications to the valveguide to allow more lift and new springs. ok maybe i wasnt clear about what I am doing. boat has run great for last 2 seasons, now had to change distributor to get rid of factory rev limiter. Your 1988 block should have the rollers. 30,s on motor and 7. 3L LM4 LS truck engine sports. Vortec heads (and most others) like straight stemmed valves. 5 ratio stock rockers but running a 350 cam with 305. the max lift on unshaven vortec heads is. 7L 350 heads. • EQ Bare heads are ready to install to the drive train…no porting or polishing needed! • EQ Loaded heads include OE-quality stainless steel valves, seals, valve springs and retainers. Tim's Automotive Garage 183,684 views. While we are going to calculate on a 20% drivetrain loss the important thing to look at is the base numbers vs the new numbers. 480, but you can always modify these heads for more if you wish. 383 internal balance Mercruiser MPFI ported, 27lb injectors, ported throttle body Iron 64cc vortec ported and polished Comp Cams Beehive springs for 0. If you want more when you rebuild in 2-4 years you can do a marine intake, blower cam, headers and a walbro 255 to see 500 crank horses. The LSA on this cam is 113°, creating two degrees of overlap. It should really make it a stop light. I would suggest a block drilled for roller cam as the best Vortec cams are rollers. More info on them can be seen at Vortec L31 cylinder head. too bad he dont make 1. Requires special intake manifold to fit the Vortec bolt pattern. To squeeze some more ponies out of your Fox Body Mustang, upgrading the cylinder heads can lead to some substantial results. Chevrolet Performance Parts L31 Vortec Cylinder Cast Iron Heads have set the standard for proven performance and budget spending. Hydraulic is fine though. Gm 602 Crate Engine Cam Specs Engine is sealed at the intake manifold, cylinder heads, front cover, and oil pan Aluminum Pistons Hydraulic Flat Tappet Camshaft, Lift:. 480", but when you ad in the valve-seal to retainer clearence, you end up with a safe lift of around. 6 rockers on both intake and exhaust, if I recall correctly. I have 84 z-28 with a 355 dbl hump heads 1. Valve Lift. 550 lift, Crane gold rockers 1. Will this cam work with a 4. com makes a spring and retainer kit that allows for. Chevy Big Block V8. How much lift can stock Vortec heads handle? I have matching springs, Competition Cams 742-16 Steel Retainers, with locks, do not have new valve stem seals yet. I want something that will give me a. So what's going in my Attack? "Project Blitzkrieg" Top Secret nowadays In the meantime: 2003 Mazda 6S, debadged, demolded, Hurst T-handle shifter, MSD Stacker-8 Ignition, 160F t-stat, throttle body grounded and coolant bypassed, blackened headlights, Boston Acoustic ProSeries 6. 490 lift, a 230/236-degree duration split and 110 lsa. Cam lobe is a critical part of the valve train operation and engine performance. I like going to Vortec heads and you did the math so you know what your compression will be as a baseline. 60 rwhp gain is a very noticable improvement. ok maybe i wasnt clear about what I am doing. 595 113+4 LUNATI VOODOO 20540715 GM LS LS1 LS2 4. Ford-456 max. Part number 12530283 is the Heavy Duty replacement engine direct from GM Powertrain and fits most 3/4 and 1-Ton G-Series Vans, P-Series Trucks, Silverado's, Sierra's, and Suburban's. SBC ProComp Aluminum Cylinder Heads 210 Runner Assembled - Item # PCM 3003C. 480 is the max lift on a stock vortec head is because the valve spring retainer will come in contact with the valve guide (first crushing the seal). I have a stock 92 chevy sbc 350 5. If you get the vortec heads, do yourself a favor and upgrade the rocker studs from press in to thread in ones. (not aluminum LT1) That's right, no machine work required to set up a pair of these heads. 2 bolt main. Here's a side-by-side comparison between the stock heads and the Brodix heads - everything else the same including cam and exhaust: All bigblocks are under-valved, that's why you'll see such huge cam profiles specified for "mild" builds. That engine is a stock Vortec 350 with a flat tappet hydraulic 212º/222º 0. Some small block Chevy engines had problems with valve guides near the heat riser/EGR valve passages tightening up and causing premature cam lobe wear (also pushrod bending) due to hot spots caused by the constant flow of exhaust gas to the EGR valve. 480 max lift. Cams with durations in the 195 to 210 degree range (measured at. A Small Block Chevy tech site with Block casting numbers, Cylinder head casting numbers and much more information. The heads provide outstanding low-lift flow numbers (the more air you flow, the more potential power) and Fast Burn performance all in an affordable, cast-iron head. I've read I can use LS3/LS6 valve springs, Comp Cams retainers, and Dodge Daytona turbo 4 cylinder valve seals. Let's proceed directly to Gary's very detailed and insightful comments:. 500 should be max lift before any binding on 87+ heads, stock lift is between. note: cam specs are for gross lift @ 1. Stock Rocker vs Roller Rocker Introduction to Finite Elements December 2003 Calculation 1 Spring Load Calculations. 7 Vortec 906 062 Cylinder Heads Pair. LT SERIES GEN II SMALL BLOCK CHEVROLET INFORMATION The LT1 series Gen II small block Chevrolet is very similar to the standard small block. Don't count out a gm lt4 hot cam. 450" lift or under and not worry about te clearance prob. if you do get it machined look up the hot cam. This range is due to production line machining and casting variance. Presenting n isky on sale today online!. 050" less than max lift. Re: Let's hear about your DYNO PROVEN power combos This was a fun one Small block Chevy, 304" endurance engine Bore & stroke 4. what is the max cam lift that can be used with stock vortec heads? i have heard everything from. 420 or else the valves float. I plan to run a factory stock (cruiser class) 82 monte carlo metric ss next season and have a few questions. i have a set of 5. No aluminum. this is the most important lift areas related to power production. i need the max lift these heads can handle. Our Vortec kits are engineered specifically for Iron Vortec & 96 Iron LT1 heads. All build up with Vortec heads must have had the upgraded springs ect. 480 max lift. Because our engine is equipped with Vortec heads, COMP specifically ground a cam with the airflow available from our head and even asked questions about typical track size and fuel system used. Upgrade the camshaft and lifters; I needed to add a little more lift and duration to fulling utilize the ported heads. 0L engine 317 or 241 heads within the Internal Engine forums, part of the LSx Technical Help Section category; hello, here is what i have: 99 s-10 5. Flow data based on Cylinder #1 intake and exhaust port. I did a vortec head upgrade to a 350 2 years ago, also upgraded to a roller cam, I had comp do a special grind(no extra charge) to work with the vortec heads(has to stay under a certain lift) and target max RPM of 5500-5700. GM's main weakness is their valve springs. This head was specifically designed for maximum-effort smaller-cube combinations. These springs increase the amount of available valve lift from 0. 550" Lift, SBC Iron Vortec Valve Spring Kit for SB Chevy Vortec High Performance Hydraulic Roller Cams, up to. 050" less than max lift. 0L engine 317 or 241 heads. These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, cams, and nitrous oxide. 480 lift is the max on stock vortec heads but a spring and retainer kit will get you to. For good reason Vortec cylinder heads flow better at low to moderate lifts than any other production head. Today, we build lowend power by keeping duration shorter, and lift higher using an LSA to compliment the first two for the expected purpose of the vehicle. 60ex and my motor overwhelmingly produced more power than expected. It is a bored version of the Vortec 5300. 6 rockers and the stock springs, retainers, and keepers. Will this cam work with stock vortec springs or the comp 981's? the max lift on the cam is. boat has run great for last 2 seasons, now had to change distributor to get rid of factory rev limiter. I suspect the cam is around 200-205 duration @ 0. The heads provide outstanding low-lift flow numbers (the more air you flow, the more potential power) and Fast Burn performance all in an affordable, cast-iron head. The LSR cathedral-port. I run them on a 413-cube small block and have nothing but positive comments for them. This camshaft will not work with the latest small block Gen III engines such as the LS1. vortec heads on a 305. Anything more and I would have had to cut the valve guides down. I happened to have a Comp Cams XE268H flat tappet cam on the shelf. In the meantime, I picked up a set of 062 vortec heads. The ignition has no points, dwell, or vacuum assisted anything. Anything over that and you will have problems. Buy RV HP Z28 VALVE SPRING SET 16 CHEVY SBC 400 350 327 307 305 283 5. Sierra Classic Vortec Max. They will work on any Small block GM except LTs', and the new generation 4. Grind # HR-9299-8-CSR SBC 377-390 CID E-210 and Victor 215cc Head Max Power 6000 rpm Peak torque 3500. Loading Unsubscribe from Geovanni Cortez? Chevy 327 with 480 lift cam - Duration: 1:15. Roller lifter 112 separation 218/228 at. Going a step further, if you look at the average flow from about. 50,s on a 175 shot of gas in the 1/8 its a real street car and a sleeper im trying to tune it. ok maybe i wasnt clear about what I am doing. (I'd love to have that book also, but man, they are pricey). No billet flywheel. All Suburban Speed performance heads are dyno and flow bench tested to give you the most performance for your money. hey everyone I was wondering how much horse I would gain on my set upwith these additional mods: -1. too bad he dont make 1. Beehive springs require no machine work. Whatever you decide to apply this one for, just know nothing really beats an OEM item for daily performance driving. Valve Lift. 030 that would be around 6cc missing(or worse because the chamber was so small already), putting you around a 55cc chamber. runs fine with out getting a tune. I run them on a 413-cube small block and have nothing but positive comments for them. The results will shock you so be sure to read our Vortec 5. Maximum valve lift on Vortec cylinder heads is. Cams with durations in the 195 to 210 degree range (measured at. If I were in your place, I'd use the Comp Cams beehive springs, pn 26918, and then go with either a Crane marine cam, p/n 109811, or else the GM cam 14097395. Stock flow 216cfm at. Today, we build lowend power by keeping duration shorter, and lift higher using an LSA to compliment the first two for the expected purpose of the vehicle. 480 is the max lift on a stock vortec head is because the valve spring retainer will come in contact with the valve guide (first crushing the seal). Drop in fit,. Check the cam lobe lift on the problem cylinder before getting into any serious head rebuilding or swapping. Not so much on the high lift numbers. A 98-99 TB has a brown spring on it and a smaller throttle cam, GM Part# 17113390. pistons, vortec heads, with compcams xr258h The specs on the cam are as follows:. All EQ cylinder heads outperform their competitors—whether you need stock or performance heads. Typically, the max lift of stock Vortec heads is about. In addition, the 383 cubic-inch engine sported a 750 cfm Speed Demon. Based on a $520 short-block, GM Vortec heads, and a Comp Cams hydraulic flat-tappet oval-track cam, our Cheap 350 made more than 390 hp. This range is due to production line machining and casting variance. Especially check out Photo 14, It shows why the Vortec heads have a lift limitation and will not work with 1. Stock springs can coil bind when used with high lift performance cams. The Vortec heads will flow better than stock heads. They use similar internals, exhaust manifolds and oil pans. Max Cam Lift On Stock Vortec Heads.