CamQuest Online. These springs work great in most stock and mild camshaft applications with less than .450" lift. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android 5.0 or higher. Read the vehicles Owner's Manual for more important feature limitations and information. $95.99. The kit includes 16 - 809-12551483 valve springs. Read your vehicle Owner's Manual for important feature limitations and information. 1966 and up 400 and all 455’s without rotators; 1.880" and 2.035” for 455’s with rotators. The valve springs can no longer exert When the spring is compressed to this height, it creates a load that PAC specs at 140 pounds. Requires available 3.6L engine and Trailering Package. Hot Rod gives you the 101 on valvesprings and gives you what you need to know about valvesprings. Spring OD Spring ID Installed Height Seat Pressure Valve Spring Part # Lift Nose Pressure @ Coil Bind Free Length Preload; 0.770: 0.440: 1.125: 45Lbs: 1083: 0.400 With its ability to offer great power, this option even works for street rods and muscle carsbecause of its high-performance and power. $10.99. Always use seat belts and child restraints. Requires available 3.6L engine and Trailering Package. x 0.015" thick, Used on LT4 and ZZ4 heads as well as Chevrolet Performance Parts head assemblies P/N 25534421, 25534431, 12363287, and 12464298, Late-model V-8 seal kit for 11/32" diameter valve stems, Includes eight intake seals, eight exhaust seals, and 16 oil stem seals, Used on ZZ4, Fast Burn, LT4, and Iron Vortec Bowtie heads. ; Oil/additive must contain Zinc designed for use with flat tappet camshafts. of spring pressure. Android Auto is a trademark of Google LLC. Click here to see all Chevrolet vehicles' destination freight charges. To check for phone or other device compatibility, visit my.chevrolet.com/learn for details. O��?^����9x��(h��[0 ���� @ 1.700˝, Chrome silicone steel; use with aluminum heads P/N 12556463; orange color code, Pressure at Installed Height: 140 lbs. ... good stock springs ,New lifters and proper break-in proceedures should give good results. Report Abuse. Dyno Sheets. Sixteen- High Output Drop In Fit Valve Spring s; S ixteen- Chrome Moly Retainers, 7 degree; Sixteen- 7 Degree Hardened Valve Lock pairs (32 Pcs) To obtain optimum performance, installed heights must be measured and shimmed as required. Chevy SBC V8 Stage 4 485/485 Lift Performance Camshaft 327 350 383 GM ES804R . 308 lbs./in. Read the vehicle Owner’s Manual for more important feature limitations and information. We know the basics, and the basics are important. Always use the specification card included with your kit. Inside Diameter of Outer Spring (in): 0.876 in. Improper spring … 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. Always use seat belts and child restraints. Contact. The kit comes with components to convert a pair of cylinder heads, including: NOTE: The conversion kit is intended only for Fast Burn heads and is not compatible with Vortec heads because of insufficient room for the spring seats. https://www.chevrolet.com/.../components/engine/small-block/valves-springs Also, if they’re not used with more than the recommended 350 pounds over-the- nose spring … Not upgrading your valve springs is a bad idea. CamQuest Online. Seller 100% positive. COMP Cams CL12-600-4 Camshaft For 350 Chevy – Best Top Pick Review. Valve Train Geometry. Premier shown seats seven. Rear Cross Traffic Alert, Rear Park Assist and Lane Change Alert with Side Blind Zone Alert. PARTS INTENDED FOR COMPETITION USE ONLY. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle. COMP CAMS HELP™ 901-795-2400. To put this in perspective, the stock LS1 valve springs are rated at 76 pounds at this same installed height. See your vehicle Owner’s Manual for more information. I have run these engines with better cams and stock valve springs up to 5000 rpms with no issues but its not going to be recommended. Always check rear seat before exiting. Vehicle user interface is a product of Google, and its terms and privacy statements apply. Vehicle user interface is a product of Google, and its terms and privacy statements apply. Click for more details. Upgrading Valve Springs on Vortec Heads - All Coiled Up Adding a performance cam to your Vortec 350 is always a great idea. The average spring rate is 256 lbs. Do not use summer-only tires in winter conditions, as it would adversely affect vehicle safety, performance and durability. Read the vehicle Owner’s Manual for important feature limitations and information. BEEHIVE SPRINGS. @ 1.750˝, Use with cam P/N 3927140 and all moderate-lift racing cams, Pressure at Installed Height: 85 lbs. Chevy Safety Assist: Automatic Emergency Braking, Lane Keep Assist with Lane Departure Warning, Forward Collision Alert, Front Pedestrian Braking, Following Distance Indicator and IntelliBeam. Picture Information. Flat Tappet Cam Tech Bulletin. The stock installed height for LS engines is 1.80-inch which is the same spec for these TFS springs. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. 1.275/.925-.913/.685 Spring rate is expressed in pounds per inch (lbs/in) and is determined by a multitude of factors including wire diameter, overall spring diameter, and the spring’s height. Standard on Extended Cab and 2WD Crew Cab Short Box models. Chevy made several 350 HP small block motors. ... spring specs are 100# @1.800 265# @ 1.24. Pac racings retainers,Powell beehive springs and Pioneer hardened locks. By: JOHN from MT 0 of 0 found this review helpful. GM Gen IV VVT Cam Core Tech Bulletin. But heres what I got..I have a 20' ski boat with a 1988 OMC 5.7L Chevy. The Edelbrock #5802 Sure Seat Valve Spring for Chevy 262-400 V8 1957-95 O.E Cast iron cylinder heads are made of highest quality spring wire and precision wound to close tolerances, our Sure Seat Valve Spring sets are for use on original equipment heads when installing Edelbrock Performer-Plus, Performer RPM and Torker-Plus camshafts. Articles & FAQ's. Both 327 and 350. Certain features require a SiriusXM subscription and the Chevrolet Connected Access plan. Valve Spring Chart - Listed By Installed Height Part # # of Springs Installed Ht. of Outer I.D. or Best Offer. I have a a GM 350 crate motor with everything is stock on it, and I have a bent valve on #6 Exhaust so I was gonna buy a set of better valves from summit racing but I don't know what size to get, can some one tell me what the, Valve Head Diameter (in), Overall Valve Length (in) , Valve Stem Diameter (in), Valve Tip Length (in) of Outer I.D. Most big block engines come stock with a double spring consisting of small diameter wire and many coils. Available on select Apple and Android devices. Not upgrading your valve springs is a bad idea. Pressure: Wear Limit: 71-79 @ 1.790 190-210 @1.340: 10% Pressure Loss @ Specified Length: 2.06: 1-49/64 - 1-13/16: 5/64 (0.078) The big Chevy also has a higher stock rocker arm ratio than a small-block (1.7:1 versus 1.5:1). Free shipping. Your actual range may vary based on several factors, including temperature, terrain, battery age, and how you use and maintain your vehicle. Read the vehicle Owner's Manual for important feature limitations and information. WARNING: NOT EMISSIONS LEGAL FOR STREET USE Because of their effect on a vehicle’s emissions performance, certain parts are intended exclusively for use in competition vehicles. Includes Automatic Emergency Braking, Front Pedestrian Braking, Lane Keep Assist with Lane Departure Warning, Forward Collision Alert, IntelliBeam automatic high beams on/off, Following Distance Indicator. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. Free shipping. DON'T use stock, .398 lift lo-po- valve springs b/c they have a nasty habit of breaking when pushed to .500" lift! Soon after, Chevy released the 283 in 1957, followed by the very popular 327 in 1962. Vehicle user interface is a product of Google and its terms and privacy statements apply. Chevy LG4 305 and L69 H.O. COMP Cam CL12-210-2 S/B Chevy Hi Energy Cam & Lifter Kit 1500-5500 RPM $199.99 COMP Cams 12-600-4 Thumpr Cam, Small Block Chevy, 2000-5800 RPM On the ‘602 crate motor, we are concerned about losing the valve spring pressure when the stock springs go south. Need help finding what you are looking for? Standard on L, LS. Charts, Graphs, & Specs. Valve Timing Tutorial. Mechanically similar, GM’s LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and Isuzu got some LS love. Beehive springs that taper towards the top are a hot commodity in the aftermarket, but date back to the earliest days of the automobile. The rod bolts I torque to 45 foot pounds, ... valve springs with a valve spring compressor tool, but it can be done without one. For important tire and wheel information, go to my.chevrolet.com/learnAbout/chevrolettires or see your dealer. This is an important spec because the spring must be compatible with the overall lift created by the combination of the cam lobe and the rocker ratio. Android Auto is a trademark of Google LLC. See the Owner’s Manual for more information. %PDF-1.6 %���� Cam Recommendation. ���t]�������.����ʟ⿲�Ƹx�y�7єzɷ��C�esW�P)L��o5�ՂՃ?�-(��gj���ok��qg@�C����?���z��tSR�7�Nƨ�Ńi�-�azw���x�Qv)~��Q��l�����?���J��W ,����=v��s��k��__�_���}��?���ϐV�~��s��B&vu�n�&�����ǫ���o��� �z�� Vehicle user interface is a product of Apple and its terms and privacy statements apply. The stock installed height for LS engines is 1.80-inch which is the same spec for these TFS springs. NOTE: Check for seal-to-guide interference with high-lift cams. Children are safer when properly secured in a rear seat in the appropriate child restraint. Valve Springs Coated: No. duration range and around .350" lift. Data plan rates apply. The original head design is often referred to as having a 26-degree valve angle, although this intake valve angle of … hޜ�=�0������RՅ����C%"�����Q�F]�7�_bEl`�$6E��{������I��@� ���\��I4��qٗaK�kp-�B�{ݒ�SZ��C�&E[ڹ�� DL��=����ց���������i]o�'�� The easiest way to verify if the exhaust spring base is the deep version is to compare the overall length of the old stock springs. The Chevy 305 Vortec's valve springs measure 1.241 inches in outside diameter. These are stiff and usu- ally produce more lift than the theoreti- cal ratio they’re supposed to. Valve springs are also VERY important due to the stock ones having a redline of 4500 rpm. The system wirelessly charges one mobile device. EPA-estimated 259-mile EV range. Vehicle user interface is a product of Google and its terms and privacy statements apply. When the spring is compressed to this height, it creates a load that PAC specs at 140 pounds. The people at COMP Cams®, along with a lot of top engine builders, have spent many years improving these and other Chevrolet powerplants. Valve Springs 101. Some phones have built-in wireless charging technology and others require a special adaptor/back cover. Coil bind is the height of the spring in its fully collapsed position. This item is out of stock. 24 Includes 16 P/N 10212808 lightweight retainers. Home Subscribe to receive monthly email communications such as news, offers, and more from Chevrolet Performance. The product descriptions for such parts are accompanied by the “Checkered Flag” warning icon. And all the way up to .600" gross lift for the CanAM road-racing cam. Quantity: Sold as a set of 16. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android™ 5.0 or higher. Standard on 2WD Crew Cab Long Box and 4WD Crew Cab models. 2114 0 obj <>stream The intake and exhaust valves have a duration of 218 seconds a 0.5 rpm each. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet emissions laws and regulations and should not be operated on public roads or used for any other use. Free shipping. Then in 1967, Chevy had a big year with the release of the 302 and 350 engines. Free shipping. VALVE SPRINGS; Valve Spring Pressure lbs. The system wirelessly charges one compatible mobile device. In an effort to help consumers maintain compliance with emissions regulations, the product descriptions for many parts include emissions-related warnings and notices. The engine specs and information here is for the stock LS1 engine. x .050" thick, 55/64" I.D. Some devices require an adaptor or back cover. User terms apply. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android 5.0 or higher. $75.00. To put this in perspective, the stock LS1 valve springs are rated at … So, at some point the valve spring will wear out and start causing issues. Device data connection required. Original equipment on so many Gen I High Performance 302, 327 and LT1 350 … In most stock engines; the pressure exerted by the valve springs when the valves are closed, is around 85 pounds. Camshaft Sounds. This item Elgin Z28 Style Valve Springs, Retainers & Locks sb Chevy 400 350 327 305 283 (Spring Kits) Chevy SB 283 327 350 400 Falcon Z28 Valve Springs & Steel Retainers & Locks Kit (stock) Karbay Z28 Valve Springs Kit w/Steel Retainers HD Locks Compatible with for SBC 400 350 … The valve springs are 1.7 inches in height and have 80 lbs. of Inner Spring Rate Damper Spring Height (inches) 2.300 2.250 2.200 2.150 2.100 2.050 2.000 1.950 1.900 1.850 1.800 1.750 1.700 1.650 1.600 1.550 1.500 1.450 1.400 1.350 1.300 1.250 1.200 1.150 1.100 1.050 1.000 0.950 0.900 0.850 Max. @1.780˝, CT400, ZZ5, and ZZ383 engines (Beehive Spring), Kit of 16 springs P/N 12625033 (Beehive Spring), Pressure at Installed Height: 80 lbs. Read the vehicle Owner’s Manual for more important feature limitations and information. Chevrolet’s first design started in the early 1950s, and in 1955, the company released the 265 cubic inch, 162hp V-8. Always use seat belts and child restraints. This is a in class demonstration on how to adjust valves,using the companion cylinder method, on a Chevy 305/350 with a adjustable valve train It is highly recommended and a requirement of the warranty that the suggested springs be installed along with any COMP Cams® cam. This page summarizes the emissions-related information that you may see on this website. Great drop in replacement for stock Chevy 350 valve springs. To check for phone or other device compatibility, see my.chevrolet.com/learn or consult your carrier. Your actual range may vary based on several factors including temperature, terrain, and driving technique. Valve Springs in your engine have a very basic job, but how they do it is very important. For sale is a set of (16) Engine Pro RV880X Valve Springs for your Small Block Chevy. ... GEN V Crate Motor Take Off Chevy LT1 Stock Valve Springs & Retainers Set of 16 . @1.780˝, Pressure at Installed Height: 101 lbs. Valve springs are one of the most critical and overlooked components in your engine. Z-28 Drop in Performance Valve Springs Fitment: 1955-1985 283, 302, 307, 327, 350 & SB 400 . Cam Recommendation. 350 HO Engine Specifications: Displacement: 350 cubic inches Bore x Stroke: 4.00 inch x 3.48 inch Compression 9.1:1 Block: Cast iron, four-bolt intermediate mains Cylinder Head: Cast iron, 23º valve angle Valve Diameter (Intake/Exhaust): 1.94”/1.50” Chamber Volume: 64cc SHARE POST #26. These are the most popular budget priced high performance SB Chevy valve springs every made! Requires AWD and 3.6L engine. GM is not responsible for the safety or quality of independent supplier alterations. You can use a stock intake manifold with a quadrajet ... but I have always used my own specs which have never failed. Equipment from independent suppliers is not covered by the GM New Vehicle Limited Warranty. For more information, see the Recovery Hooks section of your Owner's Manual. Specifications: Outside Diameter- 1.270" … The total valve lift is.43 inches. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices. 9��o1�w�&ij9�Q��rd��k�v~ rk��b�J�9@�*��o�s�#n T���LCFp�:2�^��>8H�N& 4�?�X-p�/3(^0��`}��)��\W ... Stock Replacement (17) Pro Packs (3) PowerSports (1) CHEVROLET 5.7L/350 Camshaft Kits. Small Block and Big Block Chevrolet engines have become legendary since they were introduced over 50 years ago. Children are safer when properly secured in a rear seat in the appropriate child restraint. The engine’s existing rocker arms are also retained. Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. NOTE: When converting ZZZ, ZZ1 or ZZ2 engines to ZZ3 series cap, valve spring shield must be removed and add cap P/N 10045007, seal P/N 460483, and spacer P/N 10185066. Chevrolet Infotainment System functionality varies by model. To avoid the risk of injury, never use Recovery Hooks to tow a vehicle. Service varies with conditions and location. Coil Bind Height Ti. By the time original equipment valve springs have 100,000 or more miles on them; they have probably lost up to 10% or more of the tension they had when they were new. F�6Fɂ�IrBkG�H1 �v�z=x��$Gv�8B�K#���a-���[9�/��lU���T���}���S��T��B4�C���r1��iV���\^=nr��[�~�dM.o2Vn�p2��=/wO���y�̫b}�f���M����������tY~���a�Y���-ϩ��Hm$��'����E1�ϥ����^��$g�C�C9[e��prV�����[r���`8l#�K�w��+�_��5�*7�튢��,����r~}���<%M~���6�|�-λ*6MY�O�r�⏲:G�'Cc6k�7_-�J))�����4��m���5�����A��/ �� ���f(���Z%�B��$T|�zS텆��7��� �T��Ԅ�Dؐ��&̜J�Ћ|z�*���'�� ��M�f��4��!v. RV Valve Spring Set 16 Compatible with Chevrolet SBC 400 350 327 307 305 283 5.7L .500" LIFT Some people think that because it has double springs … I'd say that you're about right. Unapproved combinations may change the vehicle’s performance characteristics. Children are safer when properly secured in a rear seat in the appropriate child restraint. U.S. federal and state, and Canadian provincial agencies have the authority to administer substantial monetary penalties against individuals and companies who do not comply with these laws. When the spring loss a significant amount of pressure, the valves will start to float. The engine specs and information here is for the stock LS1 engine. endstream endobj 2117 0 obj <>stream Requires compatible iPhone and data plan rates apply. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices. Pontiac 400-455 Stainless … Charts, Graphs, & Specs. Children are safer when properly secured in a rear seat in the appropriate child restraint. EPA-estimated MPG city/highway: Sonic Sedan with 6-speed manual transmission 27/38; with 6-speed automatic transmission 26/34; Sonic Hatchback with 6-speed manual transmission 26/35; with 6-speed automatic transmission 26/34. SBC Chevy 01-501 Economy Stainless Exhaust Valve 1.6 X 4.91 X 11/32" Stem. Some devices require an adaptor or back cover. The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. "�Є'_jcM��Пk�r������n%��%G���~��a�J��"J��9Y�"�I�i!��~O�5���W��e���.�.4��o������_V��C¢D�k/qQ��5�^?鍔R/Nگ���Ƀ�����. SBC Stock Valve Spring Set Chevy 283, 327, 350, 383, 400, .450 Max Lift RV880X. See onstar.com for details and limitations. The stock Chevy valve springs lose a lot of pressure after just a few nights of racing. Each kit comes with it's own installed height specification card. Then use a valve spring remover and change both springs on that cylinder. Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. Articles & FAQ's. When setting the valve stem height with a dial indicator (above), the maximum height from the (stock) spring seat to the tip of the valve stem should be: 1.860" for 1966 and up 330 and 350’s without rotators and 2.015” for 350’s with rotators. The system wirelessly charges one compatible mobile device. Valve Spring Assembled Height Pad to Retainer: Valve Spring Out-of-Square (Max.) Displacement 350 CID (5.7 Liter) Bore 4.00(101.6) Stroke 3.48(88.4) Compression Ratio 9.4:1 Heads Cast Iron Intake Manifold Cast Aluminum Block Cast Iron (2 Bolt Main Bearing Caps) Rods Powdered Metal Crankshaft Cast Iron Pistons Cast Aluminum Camshaft Steel The springs, retainers, and other hardware are direct replacements for the conventional springs and hardware, with no machining of the valve spring seat required. Data plan rates apply. @ Specified Length: Valve Spring Free Length Approx. Check out Chevrolet Performance product releases, future car builds, and more. The bottom line is they usually make at least 5-hp more than even the stamped 1.6s. Whether you are using this for racing capabiliti… You are currently viewing Chevrolet.com (United States). h�̗mo�H���~lt��+,H�%'�[K����K+���c, R��o^064-I*U'��0;;�;;ϲ1*�B ��H��X�Z�gP��� U.S. federal and state and Canadian law prohibits knowingly removing, modifying, or making inoperative, or causing someone to remove or render inoperative, or otherwise tampering with, any part or element of design installed in compliance with motor vehicle emission standards on a motor vehicle or nonroad vehicle, or otherwise modifying any required emission and noise control system. The stock springs are somewhat weak and with the retainer-to-seal limitation, any more cam than 0.450-inch lift is treading on dangerous ground, especially if you were to over-rev the engine and put the engine into valve float. Available on LT. Read the vehicle Owner’s Manual for more important feature limitations and information. New valve springs able to handle the extra lift would be a good idea. @ 1.700˝, Production spring for 350-/290-HP engines, Pressure at Installed Height: 110 lbs. The weight of passengers, cargo and options or accessories may reduce the amount you can tow. Service availability, features and functionality vary by vehicle, device and the plan you are enrolled in. $44.47. Installation or use of this part on a vehicle operated on public streets or highways is likely to violate U.S., Canadian, and state and provincial laws and regulations relating to motor vehicle emissions. Go to my.chevrolet.com/learnAbout/bluetooth to find out which phones are compatible with the vehicle. Related Products 11/32" X .552" Viton Valve Seals, 11/32" Fixed Body Seals, 4.3 Vortec V6, VSS-286, 12 Seals $13.49 Apple CarPlay is a trademark of Apple Inc. Siri, iPhone and iTunes are trademarks of Apple Inc., registered in the U.S. and other countries. endstream endobj 2116 0 obj <>stream Some guys use the air pressure method which works okay as well but you have to be real careful, cause if you tap a valve the air escapes and the valve drops. 305 Specs, Information, & Performance. See the Owner's Manual for more information. Use with spring kit P/N 12495494 and key kit P/N 12495503, Fits Fast Burn and Vortec Bowtie cylinder heads, Kit includes 32 keys of P/N 24503856 for 11/32" valve stems. See siriusxm.com and onstar.com for details and limitations. Stock replacement valve for Gen-V and Gen-VI 454 and 502 HO engines; 12366986. Coil bind is another critical valve spring spec that helps define the total amount of valve lift possible with this spring. Data plan rates apply. Data plan rates apply. Kit for 5.7L LT4 engines. paulweldit, Aug 18, 2010. Valve Spring Chart. Camshaft Sounds. This not only causes the engine to loose rpm and power but also very damaging to the valve train. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices. per inch. See the Owner's Manual for more information. Only at www.hotrod.com, the official website for Hot Rod Magazine. Always use seat belts and child restraints. This way there is no worry of dropping a valve while you work. The “Checkered Flag” warning icon means a part is designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. This part is intended primarily for use in vehicles that are NOT: (1) “motor vehicles” designed for street use; or (2) off-road vehicles used for anything but competition. The engine’s existing intake and exhaust valves are retained, allowing installation without cylinder head removal if compressed air or another method is used to hold the valves closed. Full Bluetooth feature functionality varies by device, model and software version. runs fine with out getting a tune but a tune def helps a lot Was this review helpful? Instructions. Convert the valvetrain on your aluminum Fast Burn heads to the beehive-type system used on Chevrolet Performance’s latest Fast Burn heads (P/N 19300955) — and used on the SP350, ZZ5, ZZ6, SP383, and ZZ383 crate engines and the CT400 — to gain greater high-rpm capability and valvetrain stability. Find CHEVROLET 5.7L/350 Camshaft Kits Valve Springs Required and get Free Shipping on Orders Over $99 at Summit Racing! RV style cam or Chevy 350/350 camshaft. Free shipping.500" Lift Z28 Valve Springs Set for Chevrolet SBC 400 350 327 307 305 283 267. Increasing the spring seat diameter creates room for a larger diameter spring, which can accommodate more valve lift. The weight of passengers, cargo and options or accessories may reduce the amount you can tow. Recommended Valve Springs for OEM heads: Edelbrock part #5802 non-rotator/# 5902 Rotator; In order for this Performer-Plus cam and lifter kit to be covered under ANY WARRANTY you must use either the correct Edelbrock Sure Seat valve springs or the stock original equipment valve springs. Close this window to stay here or choose another country to see vehicles and services specific to your location. To check for phone or other device compatibility, visit my.chevrolet.com/learn for details. Vehicle user interface is a product of Google and its terms and privacy statements apply. Heads with rotators on the exhaust: 305 engines & late 70's through the 80's 350-Due to the lower spring base height on the exhaust locations, 305 & 80's 350 heads w/ exhaust rotators might need -.075" down locks and shims to establish the correct installed height in the exhaust position. This high performance single valve spring has an outer diameter of 1.32''. Spring OD Spring ID Installed Height Seat Pressure Valve Spring Part # Lift Nose Pressure @ Coil Bind Free Length Preload; 0.770: 0.440: 1.125: 45Lbs: 1083: 0.400 The weight of passengers, cargo and options or accessories may reduce the amount you can tow. Elgin Industries RV Valve Springs, Stock 1.94" Intake & 1.5" Exhaust Valve Kit with Seals compatible with 1955-1993 Chevy sb 400 350 283 327 307 5.0 out of 5 stars 2 $142.24 $ 142 . Chevrolet Infotainment 3 System functionality varies by model. They must be matched to your cam in order for the engine to reach its full potential. Click the button below to add the Valve Spring Kit, SB Chevy VORTEC, HI-Perf Hyd Roller, 130 Lbs Seat Pressure, VSK4H53 to your wish list. Does not detect people or items. @1.700˝, Pressure at Installed Height: 80# lbs. By “competition vehicles,” GM means vehicles (i) used exclusively for competitions organized and sanctioned by a local or private body and (ii) not designed for use on public streets or highways. COMP Cams CL12-600-4 camshaft option is our top pick, and for good cause.. With its many great features that will increase the performance of your 350 Chevy significantly, this choice will give you the most horsepower for the most cost-effective price. Instructions. x 1-31/64" O.D. We have also learned a few tricks along the way. EDIT: GM part # 3859911 is the valve spring used with the L35 396 up to the LS5/L34 grind..maximum lift is .490 1970 SS454 LS6 SuperCar certified stock appearing [email protected] MPH with 3.31 gear,TH400,exhaust manifolds,factory intake/780 Holley

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