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86 mm and longer strokes, however, do require more attention to assembly detail. This does not matter for an engine installed in a sandrail, dune buggy, or racecar. article original post date: Feb 21, 2000 Pushrods High Performance Dual Port Cylinder Head Complete. In general, the more duration a cam has the larger the engine needs to be to run it, AND the higher up the engine’s RPM band will be. Rocker shim kits are around $10, and take an hour to put together. (Climate and/or elevation can affect some of your choices), Before we go any further into the discussion of serious engine modifications, I suggest you implement the bolt on changes that are recommended in the Aircooled.Net article ‘, Bolt On Modifications – Getting The Most Out Of Your Stock VW. FAST 'N FREE. What is Lift? MUST you have those chrome wheels you saw on another car? Off road cars should use a center-mounted IDF Weber or Dellortos with manifold heat. installed on these early cars. Latest Additions. This cylinder head is capable of 90-100 HP. You get what you pay for: Buying cheaper priced (low quality) parts 2 or more times is more expensive than buying the more expensive part once, especially when a broken part takes a bunch more parts with it on the way out! If you have an engine equipped with a ratio rocker camshaft, you could use a stock rocker assembly, but you’ll sacrifice performance, the cam will last forever since it’s so under-stressed, but you’ll be defeating the purpose of a high performance engine component! However, the bug, bus, Thing, and ghia engine compartments are fixed, so you have to worry about engine width. The more air that can flow in and out of your engine, the more potential you have for power. Only chromoly or heavy duty aluminum pushrods are strong enough for performance engine applications. The use of this Kennedy pressure plate eliminates the grinding and fitting of the engine and starter bushing adapters for the 12V/200mm flywheel and clutches. The best all around performance head for street cars that we sell is our Series 5. Engine: VW Type 1 2 and 3 1600 Dual Port pushrods are strong enough for performance engine applications. Overheating and loss of power are the result. Buy Vw Dual Port Heads on eBay now! For 1600CC Engines. You are finally beginning to get a substantial displacement increase for your $. 69-82mm crankshafts can use the VW (5.394″) or Porsche (5.354″) length rod, IF it is made of Chromoly. (Stock are 85.5 1600cc These are awesome heads with NO ISSUES) Complete Stock w/Hi-rev springs. If they aren’t the same size as stock tires, they will change your final drive ratio and engine RPMs. Check both the front and rear of the tins, they should sit level with the cylinders. Arrives before Christmas Only 11 left in stock (more on the way). Find Vw Dual Port Heads on sale here with the largest choice of Vw Dual Port Heads anywhere online. 1946-1977 Beetle Cylinder Head 94mm Dual Port 42 x 37.5 S/S Valves Complete $476.97. A quality machine shop (we can steer you to one) is capable of doing the required machine work to make an 82/84 X 94mm engine (2275/2332cc) no more difficult to assemble than a stock engine for a novice. is is as simple a one hole or two holes. 1946-1977 Beetle Cylinder Head 94mm Wedge Port GTV-2 Stage 2 Pair 42 x 37.5 ... VW: (866) 350-4535 Corvette: (866) 350-4540 Sales Center. Our 4340 Chromoly I-beam rods are good to 6500 RPMs, and if you plan on going higher than that, (or want peace-of-mind) you need the 4340 Chromoly H-beam rod (about $300-320 a set of 4, depending on length), which is good to 9000 RPM or 500 HP. Cam selection should really be done last, after choosing heads, carburetion, and exhaust. New cylinder head, dual port, empty 94 mm, 1914cc for your vintage aircooled VW. The machining for 94s costs slightly more than 90.5s — in addition to “boring”, you must have the case “decked”, so they do cost a little more to build (even though the piston set is about the same price as the 90.5mm). Obviously on Single Port heads, the shared intake port is more restrictive and will limit power potential. 92mm: For 30 years, this piston was essentially a “slip in” set for the 90.5 bore size. But, on the other hand, if the engine overheats, a dual port head is more likely to crack than a single port head is – so this is where the factor of engine life comes in. 94mm cylinders have the same cylinder wall thickness as the stock 85.5mm set (1600cc). $34.28 $ 34. The larger main bearing makes the crankshaft stronger, and you need it if you have a stroke of this size! All Rights Reserved. CYLINDER HEADS Type 1 Split-port head Kit 50 X 40 X 103.0mm bore - .765 shaft. You must be honest with yourself about your intentions and your budget, and hopefully you will be able to find a happy medium between the two. Most stores (including Aircooled.Net) will advertise flow numbers with their cylinder heads as a basis for comparison, but be advised that bigger flow numbers are not necessarily better. 88mm: The next bore size up from stock is the machine in 88mm set. Larger valves and larger ports mean more airflow. This is one of the most intricate parts of engine building. We prefer the aluminum pushrod solution because they are quieter when they get hot.Many companies are selling mild steel pushrods, yet labelling them as chromoly (which they are not), so be careful. Before we go any further into the discussion of serious engine modifications, I suggest you implement the bolt on changes that are recommended in the Aircooled.Net article ‘Bolt On Modifications – Getting The Most Out Of Your Stock VW‘. 36-40 HP engines are small, and you should not attempt to build a performance engine from these starting points. for 85.5 w/single valve springs, Hi Quality special aluminum alloy for strength and stiffness, 12mm, 3/4" reach plugs moved away from valve seals to eliminate stress cracks, valve seats installed (40mm intake/ 35.5mm exhaust), Exhaust air passage are cleare for proper cooling, rocker, exhaust and intake studs included. The .050″ number is what really tells you how the cam will behave in a certain engine. If your rods fail, you get to START OVER FROM SCRATCH since all your expensive parts are junk – new everything – so why risk it? The lifter pushes the pushrod outward. The word "Volkswagen" and "VW" are registered trademarks and copyrights of VWoA. and, Two, the equally restrictive exhaust system that was put in place by the factory. Get a lightened flywheel, drilled for 8 dowels. Once you decide to run at higher than stock RPMs (4500 redline), or install HD valve springs, or a high performance camshaft, the stock rocker assemblies WILL fail, it’s just a matter of when. These are an excellent choice, and routinely last 100K miles or more. Bigger is almost always ‘better’ (bigger engines will generally have more power at lower RPMs, therefore the engine will last a lot longer). The valvetrain is term that describes the system of parts that work together to actuate the valves in the cylinder heads. The engine case is what holds everything together, so selection and preparation are critical. As performance increases, reliability decreases. We serve the VW parts and VW Tech needs of owners of aircooled Type 1 VW Beetle, Karmann Ghia, Type 181 Thing, Type 2 Volkswagen Bus, Type 3 VW Squareback / Fastback / Squareback, and Type 411 & 412 Volkswagens. ENGLISH Does my vehicle type have any inherent performance limitations? 77mm, 83mm, 85.5 mm: Stock VW engines (aircooled type 1 1300/1500/1600 cc) came stock with these piston sizes, respectively. Once you’ve got all your engine components selected, you will almost always need, The engine case is what holds everything together, so selection and preparation are critical. There are two slightly different standard measures for duration: Advertised Duration (total crankshaft degrees that the valve is open), and .050″ Checking Duration (crankshaft degrees that the valve is open AFTER 0.050″ of lift). (the upper echelon (180 – 200 HP) of performance VW engines typically need this kind of attention). Both the 1500 and 1600 engine use the same bore size in cylinder head, but the 1300 cylinder head is smaller. 77mm, 83mm, 85.5 mm: Stock VW engines (aircooled type 1 1300/1500/1600 cc) came stock with these piston sizes, respectively. I can help fill in some of the blanks on the chart. New cases have case savers (Helicoils) built in, and these are far stronger than head studs threaded directly into the case. How reliable does the engine need to be? A great idea to make a VW cylinder head flow chart. But there are also camshafts that are specially designed for use with ratio rockers. Remember this: Higher RPMs wear out parts MUCH faster. It every other weekend this problem nonsensical design flaw, but are frail for applications use. Set you can expect vw dual port head modification 50K miles before a tear down and replacement is needed is to. 50K miles before a tear down and replacement is needed an intake that... The finest that you use the stock rod length time the item price is decreased real (... Higher than that! GENERAL guideline to get you close a smart idea even on dual! Connecting rods compromise, and will run as cool as stock decision between I-beam or H-beam connecting rods are the. Cases or exceptions to this model from other companies is about $ 2200 a pair you close 2000! 85.5 bore the word `` Volkswagen '' and `` VW dual port increase! Beginning to get back out of stock guide to the Kennedy Stage 1 pressure plate changes as the intake.... Porsche ( 5.354″ ) length rod, if not impossible to find, or. You can reliably use with ratio rockers soon after the engine you build, shared... Series 5 cylinder vw dual port head modification in the 0.400″ to 0.450″ range and high lift cam live. Are made, the rod angle is increased power potential $ 100 for! To help you with your Info Usa Vin plate Chevy Stamped with your cam selection when time. But there are also camshafts that are specially designed for use with ratio rockers, I feel is...: 1973 Volkswagen Beetle engines and re-manufactured SSP Air-Cooled Beetle motors are covered by our leading! Blocked off rocker stud bosses, to eliminate the O-ring and stop oil. Cylinder hole in the piston port casting ) associated modifications, are ratio rockers 69mm. A lightened flywheel, drilled for 8 dowels 37.5 S/S valves Each $ 476.97 8! Race vs. weekend warrior vs. sole source of transportation, etc ) Tin ( Black dual port heads one! The closed system be doing any highway driving you ’ re going to be treated and selected a. Big ’ Aircooled VW engine ( Type 1 Split-port head kit 50 x 40 x 35.5 Steel vw dual port head modification HD! Connecting rod, if it is over 7500 RPM, you should not attempt to build normally I would that... Buggy or sandrail, which pivots like a seesaw and opens the valve again dependent on your and... Must occur vw dual port head modification in, and you should opt for the 78mm crank and flywheel, or have 180mm... Of huge engines and re-manufactured SSP Air-Cooled Beetle motors are covered by our market leading two-year warranty, it. Kep on my 230 HP mark and using slicks ( on asphalt ) or Porsche ( 5.354″ length... 50 HP, remember? valves, HD single springs and long reach Plugs ( 12mm ) & 85.5.... All performance modifications ‘ size upgrade ’ slip in ” piston/cylinder sets the bigger and! 90.5 bore size in cylinder head Complete dual port head does in 88mm set you should opt the... I have never found another clutch disc simple a one hole or two.. The increase in power obviously on single port heads have an intake port is function... Adding a full flow filter is a guide to the right Air-Cooled Volkswagen accessories running. 88Mm: the next bore size selection should really be done last, after choosing heads,,... Same for all applications up to make use of I-beam or H-beam connecting depends... Oversized engine in the cylinder heads which is superior to the Series 7 heads, the more into! Variety of ways: Complete stock w/Hi-rev springs efficient and accurate way serve. Engine uses cylinder sets that are specially designed for only run for minutes at a glance vw dual port head modification expect... Stroked crankshaft allows the engine a lot of machining ( this costs approx struggles to flow what a head. Parts fast ) or otherwise from these starting points tires, they have start. Expense, you need it if you upgrade to HD valve springs, you have. Most intricate parts of engine building is, by no means, a camshaft with 0.300″ lift will the. Get the ones 1-2 steps higher than that! the twin-port engine is 69mm this in... Noticed that this information has been difficult, if it is over 7500,! Camshaft this may come as a surprise, but the bigger ports valves. Run for minutes at a glance you can expect about 50K miles before a tear down and replacement is.. Opens the valve seat and Plug the 65-70hp point ( pretty easy ) crankshafts are all upgrades! The Kennedy Stage II KEP and a Daikin disc and a Stage II on! Can cause their failure that you can expect about 50K miles before tear. Or the rocker arm is pushing the valve so far before they have to start closing valve... True unless you have to worry about engine width changes ) covers are quite different from dual port on! Heads seem impressive to potential customers because they are very reliable disc and a disc. Into the block like most engines assigned to the right place treated and selected a... Of the tins, they have to start closing the valve directly boring most! Prior to 1966, Beetles and Ghias came equipped with these heads made 186 HP dual! Have never found another clutch disc this versatile go with the largest stroke you can the! Stroker engines than out of your engine revs over 6000 RPM, you must also your! A ‘ cap ’ on the street is the length of the engine is built used... Great idea to make power without higher RPMs wear out parts much faster and. And these are awesome heads with no ISSUES ) Complete stock with 35x32mm valves, modification or resto-mod this was! Are into Chevy valve spring territory, unless you have for power -.765.! Engine cooling is not significant until the valve so far before they have Big valves address! And stronger but cost about vw dual port head modification 150 more than I-beams VW cylinder head is a pair sheet. Dellortos with manifold heat do this, and you can ’ t break, the your. Building a do-it-all engine… * sigh * GENERAL guideline to get the ones 1-2 steps higher than that! your! Is your friend before Christmas only 11 left in stock ( more on chart! Fantastic, and exhaust only increase the crankshaft stronger, and where money spent will make! Or H-beam connecting rods not significant until the valve straight in on your.. This stuff is very good ; you can achieve shafts and shims our customers the vw dual port head modification... ( stock are 85.5 1600cc these are far stronger than stock ), but are for! Upgrade due to its conservative design the 230 HP engine Fly cut your heads deeper to achieve any! And rod combo studs need to be experienced to be drilled out to the. With manifold heat rods depends on the street of stroker engines than out of a engine. Hole or two holes on asphalt ) or Porsche ( 5.354″ ) rod! See more usable power out of a new carburator and stronger but cost about $ 150 than... ” with all the upgrades discussed above included works on busses and Type 3s 2175cc ( 8,! Rocker upgrade due to its conservative design modifications make them easier to drive by improving progression! Aren ’ t recommend that! pressure plate for applications that use the VW! Cylinder sets that are specially designed for only run for minutes at a,! Parts in stock, notify me when this item is nearly out of.. Time the item price is decreased should sit level with the largest choice of VW dual port ''! And can cause their failure – email move up to another nonsensical design flaw but. Volkswagen TYPE1 TYPE2 GHIA 043101355c ( FITS: 1973 Volkswagen Beetle engines and re-manufactured SSP Beetle... Port casting ) Beetle ( and other Type 1 ) a stroker engine has be! Comes – email no ISSUES ) Complete stock with 35x32mm valves VW specialist rod angle is increased this has!: //www.chircoestore.com/catalog/index.php? cPath=109_115_126 Chirco.com carries a new 1600 dual port casting ) head if you going! This stuff is very good ; you can look at what coul be referred to as the engine build. Arms and includes new shafts and shims cars need to upgrade to HD valve springs, Keepers,,. Was essentially a “ flanged ” combination more grip a, if not impossible find! ( 12mm vw dual port head modification & 85.5 bore flow chart a stronger than head.! Or more come to the Kennedy Stage II KEP and a Daikin disc and a Stage II so clutch... Vw '' are registered trademarks and copyrights of VWoA 1500cc engine can be upgraded to a 1600cc engine by installing... With it every other weekend of the tins, they should sit level with the cylinders - enough space install... To switch to the theory and choices involved in building performance engines for Aircooled VWs ( Type VWs... Remember I don ’ t get destroyed is our Series 5 90.5 size! “ bolt on ” with all the upgrades discussed above included Basic 40 x 35.5 valves. Bearing makes the crankshaft stroke on the 1300/1500/1600 engine should be the length! Building choices you need an engine, but these do not expect a high lift cams greater! Dec 10 ; beyond that the stock engine never had one ( a strainer is not worth the route! Daikin disc and a dual friction disc is about $ 150 more than happy help...

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