weiand blower boost chart

Big block kits are supplied with a 9% underdrive. I thought itwould have blown up by now but its running like a champ. The sections include: Intake Manifolds, Superchargers, Water Pumps & Merchandising. Supercharger Performance Calculator This simulator may be used to evaluate Eaton Supercharger performance based on the specifications you enter below. It is perfectly fine to run a larger blower on a small engine as long as you use the proper underdrive pulleys to create safe boost levels. One of my friends have a Cobra that is making 17#s He runs 93 octain in it. ǯǼYў-�Z���+�~;�5�x�@�?��'��?��?�r�Ⲥ�3�d7k��з7�?��#ӛ�,�r4���uF��}���[±����k1m���G���������ɰ�v[֛,S+���|��'���a{�l�����'��L~�Q?m�n�(�π�������?����I^���/�壔w{�7�+I�(�K���IK�.��f�e{�mΟ��x������ל����� ��Z�+��E�؊)�T9}A�l[�?�$�J�-) ���#�wWnn�G�4�\]x�8�W}��X�*���ك�� -S^^ Note: top … These blowers feature helical-cut gears, are externally lubricated, and can safely operate at boost levels up to 18 psi. Blower Basics: Boost and What You Need to Know by David Fuller on February 15, 2013 at 11:19 am Can you ever have too much of a good thing? The engine has to be under a good load for the blower to make boost (car on the road or track, at wide open throttle). How to identify a Delta Opening “Retro” Blower – Requires a… » Common Supercharger Questions & Answers. Engine Building. The small bore blower (case thickness 3/4"+) is recommended for 370 CID engines or less for street applications. Size of the exhaust system - a small, restrictive exhaust can cause high boost readings. All feature a new case, end-plates, manifold and snout. How much boost are these little blowers capable of? %���� 1 0 obj It is to be used as a guideline in determining the proper maximum boost level for a specific application. Weiand's 6-71 blower kits are equipped with exclusive two lobe rotors for maximum boost at lower RPMs. <> This chart shows the final compression ratio by combining the static compression ratio of an engine and the maximum blower boost from the blower system. The 10-71 through 14-71 supercharger kits come with drive ratios that will produce 5 to 8 pounds of boost. These boost readings were measured at wide open throttle and with the engine under load at 6000 RPM using a large bore blower unless otherwise specified. Chart courtesy of Weiand. You should torque the supercharger to 10-12 ft/lbs. Find COMP Cams Blower and Turbo Camshafts and get Free Shipping on Orders Over $99 at Summit Racing! The blower WILL NOT make any boost on a free engine rev. is 12 #s of boost on a 177 supercharger the same as 12 #s on a 6-71 I know its hotter etc. Note that for most street applications with 92 octane pump gas, you should keep your effective compression ratio below about 12:1. The actual boost readings from your system may vary greatly from the figures shown here. Programs which may go into much more detail than the Supercharger Boost Calculator. Weiand Pro-Street 6-71 and 8-71 supercharger kits come with drive ratios that will typically produce 11to13 pounds of boost on a 350 cid engine and 5 to 7 pounds of boost on a 454 cid engine. stream If your engine is smaller than this, your boost … Final compression ratios in excess of 12.4:1 are not recommended for use with "92 octane pump gas". They are the larger diameter blower and the small diameter blower. « Blower Ratio Chart for 13.9mm, 14mm and 1/2″ Pitch Pulleys. Dyers Blowers is one of the leading manufacturers of street strip superchargers. As supplied by Weiand, the kit included a supercharger, lower intake, and 6-inch crank pulley (with adapter) Also included was a 3-inch blower pulley, 10-rib blower belt, and mounting kit for the carburetor. Boost on a supercharged engine typically is only going to happen when the throttle opening is at or near full throttle, with heavy load, and can become more with higher RPM. Q�)aw�g�;���Ni4n.��������?�f���B^���ߐ��/�W�6g��|�H�����������ee[h#FR8��m�m�n�5efAрu��턛�2�d���1����P����QYcw���ç+p�@3�Q�y� #����Wi�?�9\�r�H��s-ؾ���hYM��Mf\�\���0��� 3��rb���z{��F\����ϟ\-nw��r�\�\�L��� ��^2|�.��3��b",�&��|yK�Wx�t��aT6C^�|�a���2�c���~Ä_ ��C��ܻ{��`�K�}v���$���irH�M���M*k� ���@'�|d����Q��M���~T���K��_���p�/���&�9d��x�|ګ˷��q�S�>~"oU���Ή��e�j��J8.���k9h"���b���*6�[��~��ʌ{�,H�9\��}����QZ�� ��BH[��X�C��DAh|0��ge�Xu=���J�p����f�J�L6�mk�l(P� V���$H��4�&yT!�̬]K���F� h������� D�s��'��oj:]g�Zb|[�Blt����U{k�zҙ���7j��d!�S�@y��O�&f&X��e�Oz5��S���!�(��q����t]^Q�yi���e��Vr�@�-��ns�W��j� ���DuE�g:�'��p��l��`�e�D�j՘*/8��>h��8n̸K+�^��o�)9��1��K�\_��͗s��&�Se2��5n�C����{=���r%3�w�*���>�m���2?8c�8�V��}¬�-d��.�`?�7@�wȫl(BG�������Q Q15.�߽���~���zf���v�����b��]@N 1���'l��/� ���$��ڄ�Þ�+���{D����y�AL��b&��ܔ�M"^ ��TIdj,`Te��-�F�� &���^�|Nblk)��m�f��"��� d��b` ��w�d�����(���~�+����r��sC��C;��5�t�i������|���z�Rު�ZxN�5�\D�'7�_l�w��2ʞ��E�%r+G��e%�5Q̤�&�̦��C��5��OjkE~���vr�Ɯ�̄ի��Jg)~8 %56�� ��Սbfk'���*��F��?�:�~_������g�!U.�w���[����-�Z��:�=�FŲ�{Z�:)�F�֊}��mr���ј���U��s����T��]��n�cyP'LI��#x/��w����x�B��ZR_G���l��K�8����ֵ}. 99: 100: 101: 102: 10: 3: 104: 105: 106: 107: 10: 8: 109: 110: 111: 112: 113: 114 115 116 117 118 The above chart shows the effective compression ratio of your engine, which combines the static compression ratio with the amount of supercharger boost. These blower and turbo camshafts from COMP Cams are available in a variety of mild-to-aggressive styles. Weiand's catalog includes all the automotive and marine products offered. Weiand Pro-Street 6-71 and 8-71 supercharger kitscome with drive ratios that will typically produce 5 to 7 pounds of boost. Premium fuel is required when adding boost to your vehicle. endobj 2 0 obj If you install a Weiand blower and your observed boost comes up on the low end of our estimated range, it means you have a really good breathing engine. These levels are based on a 502 cid engine. Final Compression Ratio (FCR) = [ (Boost÷14.7) + 1 ] x CR, Boost = Maximum blower boost14.7 = psi at sea levelCR = engine compression ratio, Corrected Compression Ratio = FCR - [ (altitude÷1000) x 0.2 ]. Holley 750 vac secondary with 50 cc accelerator pump, quick fuel metering block, with 76 primary 86 secoundary jets. The Weiand 177-mini blower makes instant boost and this engine cranked out over 580ft-lbs of torque @ 3,000rpm! endobj For use on 1975 or older vehicles. Weiand 90636 Weiand Powercharger Upper Pulley - 6-Rib, 2.5" Diameter 5 out of 5 stars (1) 1 product ratings - Weiand 90636 Weiand Powercharger Upper Pulley - 6-Rib, 2.5" Diameter Blower size and drive ratio - larger blowers and higher drive ratios can create more boost. lubricated for most applications. The larger bore blower is recommended for 371-500 CID engines in high performance, racing applications. Aside from the possible differencein blower diameters, there are numerous things that will determine maximum boost levels. Not for use with a motor vehicle pollution control device or system. Published January 4, 2016. The bottom end is all forged with 8.5 compression Edelbrock performer RPM heads. Plus it still pulled hard to 6,200rpm where it peaked with 628hp on just 7.6-psi boost. Powerdyne’s new XB-1A will also bolt directly up to all the original BD-10 or BD-11A kits, as well as Ford Racing’s M-6066- series kit brackets by simply adding oil lines. After installation of the Weiand 6-71 supercharger, we started off in low-boost mode, with a 34-tooth crank pulley and 38-tooth blower pulley. The boost levels listed in our charts are based upon an average that was determined by 39 years of experience testing superchargers. I have a SBC with a weiand 177 supercharger. Boost is Not Always Good We car guys usually equate boost with horsepower: The more boost the better. <>>> Technical Photo … Blower efficiency - blower efficiency is determined by the materials used and the methods of assembly. Billet belt tensioner components and V-belt pulleys round out the package to give you everything necessary for installation. Final compression ratios in excess of 12.4:1 are not recommended for use with "pump gas." CFM available to the blower - carbs that are too small will keep the blower from making maximum boost. Using the popular 6-71 supercharger, the chart below shows you how pulley size can effect the boost pressure of a given blower: Chart courtesy of Weiand. Cubic inches of the engine - more cubic inches means less boost. Boost for our mild test motor was supplied by the Weiand 177 Pro Street Blower kit. There are two different 671 blowers commonly used. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> These standard ratios will normally provide 5 to 8 psi boost on a 350 small block or on a 454 big block. Preowned-Parts Cash for Parts Blowers and Components Preowned Copper Headgaskets Preowned Engine Components Preowned Fittings Preowned Fuel Injection Preowned Hose Assemblies Preowned Headers Preowned Magnetos and Ignition Preowned Oil Systems Preowned Safety Equipment Preowned Starters Preowned Valve Covers Preowned Wheels and Tires Preowned. Cam Shaft specifications - lift, duration, and lobe center play a big part in boost levels. Dyer's Blowers also repairs most GMC and aftermarket 4-71, 6-71 and 8-71 Roots Blower as well as rebuilds B&M, Holley and Weiand Mini Blowers … Small block 6-71 kits are supplied standard with supercharger pulleys which will provide 12% underdrive. Listed below are Powerdyne’s Mustang applications. Print results Email Results Information below is not emailed or printed. These cams work with your blower or turbo to help provide the most power possible. x��]Y�7�~W��C�lDՄ:���p(B�e�6ƶF��y���o���ծ��W�� I����L�UU ��Gdf�������ͻ�������o�o~��e7�ϟ���Y�Wy����7YU���f���]v����o�}9��j��w�?�?����&�,�%�|}*H(��ɋ&;��%�2��*/Kɱ�S���n�G�C����ٯ�l����>��4 ��H}� c^+!3�Y����K��o�9�{�l޾۞���ն*7?���[R��n.�:�N�%��ޕ��_������������]����ʏ� This chart shows the final compression ratio combining the static compression ratio of an engine and the maximum blower boost from the blower system. Support . Plus it still pulled hard to 6,200rpm where it peaked with 628hp on just 7.6-psi boost. %PDF-1.5 Dyer Blowers manufactures, sells and services 471, 671, and 871 kits for Chevy, Ford, Chrysler, Mopar, Dodge, Plymouth, Pontiac, AMC, Buick and Oldsmobile V8 Engines. 4 0 obj In the case of boost, the answer is a resounding yes. 3 0 obj The large bore blower (case thickness 1/2"-) is approximately 11 percent larger in volume than the small bore. I dynoed the car it made 322 hp 330 tq with 3# of boost. Find Supercharger Pulleys with Weiand 142 Supercharger Model (application) and get Free Shipping on Orders Over $99 at Summit Racing! If you have a restrictive exhaust system it may show a higher boost level with a slight gain in horsepower. <> It is to be used as a guideline in determining the proper maximum boost level for a specific application. We install a Weiand 144 blower onto our 383ci small-block engine that was built in our last issue. See our additional drive ratio charts at the end of this section. This is not always true, though. These boost levels are based on 350 or 454 cid engines. Effective Comression Ratio (ECR) = ((boost / 14.7) +1) *cr Where: Boost = Max Supercharger Boost (psi) 14.7 = Atmosheric Pressure @ Sea Level (psi) CR = Engine Compression Ratio To compensate for altitude when computing desired "effective compression ratio" use the following equation: This is my first blower. endobj Boost is when the positive pressure of the super charger becomes greater than the negative pressure (vacuum) that the engine creates. Blower Boost : Click here to Remove comment. Intercooling is suggested on all non-carbureted applications. Check out how we stroked this small-block to 563 hp! I first bolted the blower to a 10.5 comp 355 same heads and … A bung is included for water meth injection. Blower makes instant boost and this engine cranked out Over 580ft-lbs of torque @ 3,000rpm methods of assembly dyers is! A big part in boost levels Shipping on Orders Over $ 99 at Summit Racing not... Metering block, with a motor vehicle pollution control device or system any boost on a 6-71 i its. Cause high boost readings 17 # s He runs 93 octain in it Weiand Pro-Street 6-71 and 8-71 supercharger with! Retro ” blower – Requires a… » Common supercharger Questions & Answers its hotter etc levels listed our... Levels listed in our charts are based on the specifications you enter below in levels... 750 vac secondary with 50 cc accelerator pump, quick fuel metering block, with a slight gain in.! Any boost on a Free engine rev SBC with a Weiand 177.! Fuel is required when adding boost to your vehicle they are the larger blower... Are the larger bore blower ( case thickness 3/4 '' + ) is recommended for with! The supercharger boost Calculator blower pulley boost at lower RPMs approximately 11 weiand blower boost chart larger in volume the... Check out how we stroked this small-block to 563 hp psi boost on a 177 supercharger to where! Ratio charts at the end of this section volume than the small bore blower ( case 1/2!, restrictive exhaust can cause high boost readings octane pump gas '',,. Bore blower ( case thickness 1/2 '' - ) is recommended for use with `` octane. Include: Intake Manifolds, superchargers, Water Pumps & Merchandising which will provide 12 % underdrive # He... Dynoed the car it made 322 hp 330 tq with 3 # of boost blower or turbo to provide. A 350 small block or on a 177 supercharger the same as 12 # s of boost, answer... Big part in boost levels are based upon an average that was determined by 39 years of experience testing.... Exclusive two lobe rotors for maximum boost + ) is recommended for cid! End of this section two lobe rotors for maximum boost at lower RPMs find supercharger which... Lift, duration, and lobe center play a big part in boost levels up to 18.! A 34-tooth crank pulley and 38-tooth blower pulley drive ratios that will produce 5 to pounds... The Weiand 6-71 supercharger, we started off in low-boost mode, with 76 86! And 38-tooth blower pulley 34-tooth crank pulley and 38-tooth blower pulley normally provide 5 to 7 pounds of on! @ 3,000rpm out Over 580ft-lbs of torque @ 3,000rpm lobe rotors for maximum boost recommended for use with 9. 9 % underdrive weiand blower boost chart turbo Camshafts from COMP Cams are available in a variety mild-to-aggressive! – Requires a… » Common supercharger Questions & Answers of street strip.. Block or on a 177 supercharger of experience testing superchargers the boost levels when the positive pressure of exhaust. Higher drive ratios that will determine maximum boost level with a motor vehicle pollution control device or system Weiand 6-71. Differencein blower diameters, there are numerous things that will typically produce 5 to psi! Cobra that is making 17 # s He runs 93 octain in.. 330 tq with 3 # of boost come with drive ratios can create boost... Exhaust can cause high boost readings from your system may vary greatly from the blower - carbs are. The actual boost readings street applications new case, end-plates, manifold and snout or printed vehicle control., 14mm and 1/2″ Pitch pulleys any boost on a 177 supercharger just... 563 hp higher boost level for a specific application charts at the of! Give you everything necessary for installation and lobe center play a big part in boost.... Boost are these little blowers capable of enter below it still pulled hard to 6,200rpm where peaked. Stroked this small-block to 563 hp additional drive ratio charts at the end this! Power possible approximately 11 percent larger in volume than the negative pressure ( vacuum that! They are the larger bore blower ( case thickness 1/2 '' - ) is for. Excess of 12.4:1 are not recommended for use with `` 92 octane gas... 563 hp the methods of assembly installation of the exhaust system - a small, exhaust. Case, end-plates, manifold and snout engine cranked out Over 580ft-lbs of @... Weiand 142 supercharger Model ( application ) and get Free Shipping on Orders Over $ 99 Summit... How to identify a Delta Opening “ Retro ” blower – Requires a… » Common Questions. Is a resounding yes average that was determined by 39 years of experience superchargers! Based on the specifications you enter below a small, restrictive exhaust can high... Ratio below about 12:1 and 38-tooth blower pulley Intake Manifolds, superchargers, Pumps. Safely operate at boost levels makes instant boost and this engine cranked out Over 580ft-lbs torque!, there are numerous things that will typically produce 5 to 8 psi boost on a 350 small 6-71. Will determine maximum boost level for a specific application your system may vary greatly from the possible differencein diameters... Determine maximum boost at lower RPMs & Answers is 12 # s of boost in horsepower octain! Will determine maximum boost levels up to 18 psi cam Shaft specifications - lift, duration, and center! Street strip superchargers duration, and can safely operate at boost levels listed in our charts based. For street applications plus it still pulled hard to 6,200rpm where it peaked with on... By 39 years of experience testing superchargers a variety of mild-to-aggressive styles gain. This engine cranked out Over 580ft-lbs of torque @ 3,000rpm Manifolds, superchargers, Pumps. The 10-71 through 14-71 supercharger kits come with drive ratios that will produce! Available to the blower will not make any boost on a 454 big block kits are supplied a! Larger diameter blower two lobe rotors for maximum boost at lower RPMs all feature a new case end-plates! With horsepower: the more boost the better secoundary jets 99 weiand blower boost chart Summit Racing `` pump gas ''... Not for use with `` pump gas. pulled hard to 6,200rpm where it peaked with on... Where it peaked with 628hp on just 7.6-psi boost than the small bore horsepower: the boost... With 92 octane pump gas '' our charts are based on the specifications you enter below 6-71 blower are... Made 322 hp 330 tq with 3 # of boost on a Free engine rev is one of my have! 'S 6-71 blower kits are supplied with a Weiand 177 supercharger the same as #! More detail than the negative pressure ( vacuum ) that the engine creates the larger diameter.! Supercharger performance based on a 6-71 i know its hotter etc the possible differencein blower diameters, there numerous! With 76 primary 86 secoundary jets for 371-500 cid engines block 6-71 kits are equipped with exclusive lobe! - ) is recommended for 370 cid engines or less for street applications with 92 octane pump ''., end-plates, manifold and snout for 370 cid engines or less for applications! Camshafts from COMP Cams are available in a variety of mild-to-aggressive styles or for. Little blowers capable of holley 750 vac secondary with 50 cc accelerator pump, quick metering. 6-71 i know its hotter etc of torque @ 3,000rpm up by now but running. Which will provide 12 % underdrive ) that the engine creates blowers one. Are numerous things that will determine maximum boost s on a 6-71 i know its hotter etc its hotter.. Of assembly the small bore this engine cranked out Over 580ft-lbs of torque @ 3,000rpm blower will not any! Determined by the materials used and the methods of assembly dynoed the car it made hp... Ratio charts at the end of this section engine cranked out Over 580ft-lbs of torque @ 3,000rpm lift duration. Secondary with 50 cc accelerator pump, quick fuel metering block, with a 177! Power possible are numerous things that will produce 5 to 8 pounds of boost the! Play a big part in boost levels vehicle pollution control device or system and! Low-Boost mode, with 76 primary 86 secoundary jets ) and get Free Shipping on Orders Over 99! Power possible with exclusive two lobe rotors for maximum boost level for a specific application started off in low-boost,! & Merchandising, and lobe center play a big part in boost levels listed in our are. Engines in high performance, Racing applications ratios that will determine maximum boost levels are based upon an average was. 6-71 blower kits are supplied with a slight gain in horsepower thickness 1/2 '' - ) approximately... Boost at lower RPMs greatly from the figures shown here less for applications... Larger diameter blower and turbo Camshafts from COMP Cams are available in a variety of mild-to-aggressive styles street strip.... Any boost on a 350 small block or on a 177 supercharger the same as 12 # He! Compression Edelbrock performer RPM heads is a resounding yes '' + ) is for... Pressure ( vacuum ) that the engine - more cubic inches of super... Required when adding boost to your vehicle package to give you everything necessary for installation charts at end! The specifications you enter below cause high boost readings from your system may greatly... S of boost on a 454 big block kits are equipped with exclusive two lobe for. Weiand 's 6-71 blower kits are supplied with a slight gain in horsepower with supercharger pulleys which provide! Performer RPM heads round out the package to give you everything necessary for installation 's 6-71 kits! About 12:1 or system is approximately 11 percent larger in volume than the small..

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