I have never found another clutch disc this versatile! Use the stock disc for all applications up to 120 HP. The cylinder walls become too thin to maintain their integrity as the engine gets hot, and the piston, cylinder, and piston ring seal breaks down. If it is over 7500 RPM, you are into Chevy valve spring territory, unless you have ultra lightweight valves and retainers. Your 34PICT carb has a larger mounting flange than the carb for a single port engine. Sometimes, depending on the pushrod brand, they have to be drilled out to match the pushrod ends! bug 1300cc up Set of (8), Stainless Steel Push rod tube set 1300cc to 2175cc (8). You heard that right. There is a sharp edge on most heads on the inside radius of the port, and it is almost impossible to … Rocker shim kits are around $10, and take an hour to put together. SUPER-D 42 X 37 X 94mm bore dual spring cylinder head $ 425.78 Part Number: 25070-94 Add to cart ‘D-Port’ 2×40/44/48IDF Weber/Dellorto DRLA Manifold – Pair DUAL PORT ENGINES: you have a lot of options, we’ll start from the bottom and work our way up, with the accompanying logic so you can follow along. H-beams are lighter and stronger but cost about $150 more than I-beams! These are complete with Valves, HD Single Springs, Keepers, Retainers, bolt them on! Rocker Arms MOFOCO boasts the only completely MADE IN USA VW Aircooled Cylinder Heads. Am I prepared to change my gearing and tire size. Relatively speaking, it doesn’t take a lot of power for you to really get moving! The 1300cc engine can also be upgraded if you bore the 1300 cylinder heads out to the 1600cc size, or replace them with the 1500 or 1600 cylinder head. This is because airflow through the heads is not significant until the valve is open .050″ or so. This kit uses your existing stock rocker arms and includes new shafts and shims. The best all around performance head for street cars that we sell is our Series 5. From 120 HP and up, you have the option of using our dual friction clutch disc. It’s a little more difficult to work with than the 044 (which most shops consider to be the standard of VW performance heads currently), but we feel the end result with the 043 is superior. No trade-off! Rest assured that heads from AC.N are the finest that you can buy for across the board performance. 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). Well, the jury is in and 94s work. Many other heads seem impressive to potential customers because they have big valves. Well it is, but guess what!? 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. Chalk it up to another nonsensical design flaw, but these DO NOT WORK. I can help fill in some of the blanks on the chart. 311-620. (aka: How much will my wife let me spend? Reliability is very good; you can expect about 50K miles before a tear down and replacement is needed. The result of using a ratio rocker cam with ratio rockers is that more valve lift can be achieved without sacrificing durability or engine life. Even a heavily modified single port head struggles to flow what a STOCK dual port head does. Replace them with solid washers. VW HEAD STUD KIT 8MM FOR DUAL PORT APPLICATIONS - 1600CC # 043-198-035. All Rights Reserved. Be sure to get the matching set for your crank and rod combo. We prefer to use the 043 VW casting which is superior to the 040 and 041. Pushrods must be the correct length (remember – pushrod length changes as the engine width changes). Highway or city driving – or both? 94mm cylinders have the same cylinder wall thickness as the stock 85.5mm set (1600cc). There are two basic types of cylinder heads that can be used on an upright engine and the number of intake ports differentiates them: Single Port or Dual Port. Don’t compromise, and use a new case. If you are over the 230 HP mark and using slicks (on asphalt) or paddle tires (sand) , you need to wedgemate the crank and flywheel, or use a “flanged” combination. Consult an expert. That is what the IDAs are like if they aren’t modified! Remember this: Higher RPMs wear out parts MUCH faster. Tuck-Away Dual Exhaust, For Type 1 Beetle Engines, Compatible with Dune Buggy; Siwdoy 285785 Washer Clutch Kit and 285753A Motor Coupling Kit Compatible with Whi (Stock are 85.5 1600cc These are awesome heads with NO ISSUES) Complete Stock w/Hi-rev springs. This means they can only open the valve so far before they have to start closing the valve again. http://www.chircoestore.com/catalog/index.php?cPath=109_115_126 Chirco.com carries a new 1600 Dual Port Head that is casted perfectly. Automobile Parts and Service Toggle navigation Community Chevy Automotive Sales Inc. Vw Dual Port Heads : Vw 1600 Dual Port Top End Rebuild Kit Stock 85.5 With Stock Heads If you upgrade to dual valve springs, you also need to upgrade to solid rocker shafts, with bolt on ends. Well it is, but guess what!? But these short rod engines will have a VERY premature engine life, and a very limited RPM range (I don’t recommend them). I use the Daikin disc and a Stage II KEP on my 230 HP engine. i dont completely agree with the other answer. The first crank upgrade above the counterweighted 69mm crank is the Stroker crank. A slight drawback, however is that since the fin area is the same, and the engine is now larger, these do run slightly hotter than stock or 90.5 piston sets. German 1.6L Dual port VW head Price: $155 shipped: I reworked this one good used German VW factory made head. Single port covers are quite different from dual port covers. In camshaft selection you trade off low RPM for high RPM power or vice versa. I recommend a 5.7″ or longer rod for strokes longer than 88mm. Air speed through the port is far more important, but this measurement is difficult to quantify. Then the next item you will need is a pair of sheet metal cylinder covers. The alternative to stock rockers and associated modifications, are ratio rockers. I am a proponent of huge engines and mild cams. A stroked crankshaft allows the engine to make power without higher RPMs. article original post date: Feb 21, 2000 This means your carb does not fit on the single port manifold. Cam selection should really be done last, after choosing heads, carburetion, and exhaust. Am I prepared to put more money into a car than I can reasonably expect to get back out of it? We provide the classic VW hobby with tech tips, project advice, and quality parts for VW Restoration, VW Performance and Custom Aircooled VW projects. It works ‘okay’ for low mileage race applications, but it’s prone to the same problems as the 87/88mm slip in combination. However, now the 92mm P&Cs are available in the old version (which we recommend against), but also in “Thick Wall” versions, with a 94mm register at the top, and EITHER a 94mm register at the bottom, or a 90.5/92mm register at the bottom. From Air-Cooled VW wheels and Air-Cooled VW exhausts to floor mats, car covers and many other Air-Cooled Volkswagen accessories. I never recommend reusing or rebuilding old rods. VW bug 1600 dual port cylinder head 85.5 bore 40 x 35 SS valves large ports EACH (Fits: Volkswagen Transporter) 5 out of 5 stars (1) 1 product ratings - VW bug 1600 dual port cylinder head 85.5 bore 40 x 35 SS valves large ports EACH. FAST 'N FREE. This means that a 1500cc engine can be upgraded to a 1600cc engine by simply installing the 1600cc piston and cylinder set! Cutting and assembling your pushrods is a real pain (I hate it). The word "Volkswagen" and "VW" are registered trademarks and copyrights of VWoA. Do not expect a high lift cam to live longer than 40-50K miles on any engine! This stuff is very easy to find on the internet, google is your friend. If you have a 6V car, or have a pre-63′ bus, you likely have a 180mm clutch. Many companies are selling mild steel pushrods, yet labelling them as chromoly (which they are not), so be careful. 140 HP will keep even the Mustang GT’s in your rear view mirror on the street, and 180 HP will eat Corvette’s and Vipers for lunch all day. If you are looking for Air-Cooled classic Volkswagen parts, you have come to the right place. (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. 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. Do not make the common mistake of choosing an oil pump bigger than what you need because engine overheating and blown oil coolers will be the result. Pushrods If you're looking for an easy way to bolt on some power to your VW Beetle, Ghia, Type 2 Bus or Thing with a 1300 to 1600cc based engine, look no further. To achieve more valve lift you can change the camshaft or the rocker arms. Get it right! Ratio rockers have a 1.25 through 1.5 to 1 ratio (higher than stock), which further enables an increase in valve lift. 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. Add to this a budget restraining effect, and you can see the balancing act that must occur. Aircooled.Net offers the service of cutting and assembling your pushrods, saving you the do-it-yourself grief. You’ll be able to drive easily if you get stuck in traffic, or want to take a nice drive out with your mom or a date. Imagine driving a car with two power settings; idle and full throttle! When you move up to the Series 7 heads, you will experience a decrease in driveability with the increase in power. Engine: VW Type 1 2 and 3 1600 Dual Port This article is a guide to the theory and choices involved in building performance engines for Aircooled VWs (Type 1). The aircooled VW engine uses cylinder sets that are removable; they are not cast into the block like most engines. Which cylinder heads you buy is mostly dependent upon your budget. One more thing: things start getting pretty tight in that engine with a crank of this size, so you had better know what you are doing if you get one! However, the bug, bus, Thing, and ghia engine compartments are fixed, so you have to worry about engine width. This does not matter for an engine installed in a sandrail, dune buggy, or racecar. The only reason you would ever use a stroker smaller than 78mm would be if you are racing in a class that limits your displacement. More lift is better, when trying to increase engine power because more valve lift increases airflow and thereby increases power potential. There are also “high lift” cam designs, that give maximum power, at the expense of noise (they are louder), and accelerated wear to the valvetrain. Since the cylinder is attached to the crankcase, you need to use cylinder spacers to adjust the compression ratio to where you want it to be. 10mm studs don’t do this, and that’s why 10mm stud engines have a problem with pulled studs. Buy Vw Dual Port Heads on eBay now! When you upgrade to HD valve springs, you must also upgrade your pushrods and rocker arms. What is Duration? The importance assigned to the above factors will dictate ALL of your engine building choices. 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). Complete Stock w/Dual Springs. Plan on $1200 for one of these large cranks, not including the $320 connecting rod price. If you have a 6V car, or have a pre-63′ bus, you likely have a 180mm clutch. Both our brand new SSP Volkswagen Beetle engines and re-manufactured SSP air-cooled Beetle motors are covered by our market leading two-year warranty. When you stroke an engine, I feel there is no point in using a crankshaft smaller than 78mm. I use the Daikin disc and a Stage II KEP on my 230 HP engine. As performance increases, reliability decreases. Arrives before Christmas Only 11 left in stock (more on the way). The engine compartment of your vehicle is going to dictate some of your engine choices because of the relationship between rod length, crankshaft stroke and engine width. These modifications make them easier to drive by improving the progression circuit. Another excellent disc is the Daikin. It may have been fitted with twin-port heads at some stage, but it''s pretty easy to tell the difference by looking at the inlet manifolds anyway. It offers tremendous air speed and makes far more power than many “bigger” heads sold elsewhere. On a stock head, the valve is ALREADY capable of 40% more flow than the port allows. New cylinder head, dual port, empty 94 mm, 1914cc for your vintage aircooled VW. installed on these early cars. When in doubt, go smaller. Think about it — if the head port only flows a certain amount, the installation of a large valve does not help, since the valve is not the restriction! The price difference between the rods for the 78mm crank and the rods for the 84mm crank is around $160. A test 2.0L engine with these heads made 186 HP with Dual 44 Webers. Streetcars should use dual 2bbl Webers or Dellortos once they reach the 65-70hp point (pretty easy). You use the adjustable pushrod to cut your pushrods to the desired length then tap the ends in using a hammer and two old lifters (to keep from screwing up the ends of the pushrods). These heads have combustion chambers of approx 59cc without modification 84mm strokers require a different connecting rod, which costs more. Engine selection is a series of compromises – you can’t have everything! The solution is to either strengthen the existing rocker assembly or install the alternative: Ratio Rockers. (We are more than happy to help you with your cam selection when the time comes – email. ‘. 77mm, 83mm, 85.5 mm: Stock VW engines (aircooled type 1 1300/1500/1600 cc) came stock with these piston sizes, respectively. Longer crankshaft strokes require a longer connecting rod, and/or a stronger or a better-designed rod connection system. For example, a Stage I KEP and a dual friction disc is about equal toa Stage II KEP and a Daikin disc. vollks.com.au has all the essential Air-Cooled VW parts whether you are doing a Air-Cooled VW restoration, modification or resto-mod. The more air that can flow in and out of your engine, the more potential you have for power. 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. Streetcars will always see more usable power out of stroker engines than out of a small engine running at high RPMS. Many years ago, I too was ‘a hopeful believer’ in the possibility of building a do-it-all engine…*sigh*. I will refer to “machine in” and “slip in” piston/cylinder sets. I recommend going to a type 4 center main bearing on a crank of this size, or even type 4 mains all the way along (special engine case machining is required for this installation). The stock rod length is fine as long as you use a stronger than stock rod. 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. Even the stock 1600 dual port is a good candidate for performance tuning. The cylinder openings in the head are roughly 94.5mm. Aircooled.Net offers the service of cutting and assembling your pushrods, saving you the do-it-yourself grief. When your engine studs need to be replaced, use these 8 mm studs for great results. Also the larger the engine you build, the more complicated and intricate the engine building process. Duration is the number of crankshaft degrees that the valve is open or ‘for how much of the crankshaft’s rotation, is the valve open?’. the dual port refers to the intake ports on top of the cylinder head. New cases have case savers (Helicoils) built in, and these are far stronger than head studs threaded directly into the case. • Fits without modification in any street car. A perfect example of pure marketing hype. At AC.N we refer to RPMs as “Ruins Peoples’ Motors” (LOL!) Once you’ve got all your engine components selected, you will almost always need cylinder spacersand/or head gaskets to set the engine’s deck height. This determines the operating RPM range of the engine. 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‘. Camshafts are rated/compared by crankshaft duration. IAP Performance AC119313 Cylinder Head Tin (Black Dual Port Pair for VW Beetle) 3.8 out of 5 stars 18. When it comes to performance engines, in general, “Jack of all trades – master of none” is the axiom that applies. On top of a new manifold, you will need a new carburator. Request to Add an Item or Combine an Order, Request to Cancel [Either an Item or Order], Report PROBLEM WITH SHIPMENT [within 10 DAYS], Request RETURN AUTHORIZATION [within 30 DAYS], Initiate a WARRANTY CLAIM [timeframe varies by product], Get VW Project/Product Tech Help [Free via Email], VW Performance Engine Building Considerations, Carbs 101: Selecting the Right Carburetor System, What is my budget? Cutting and assembling your pushrods is a real pain (I hate it). Almost all piston and cylinder sets are available in two versions: short stroke (these are considered “A” pistons), and long stroke (these are considered “B” pistons). These heads have been ported and polished for … Only chromoly or heavy duty aluminum pushrods are strong enough for performance engine applications. Aircooled.Net only carries street heads that have full cooling fins, and will run as cool as stock. Other options New from $31.12. “Stroker” refers to any crankshaft with a stroke longer than stock, (which in the case of Type 1 engines is 69mm). These are an excellent choice, and routinely last 100K miles or more. 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. Plan on $60 for a GOOD kit. The lifter pushes the pushrod outward. The PORT is the limiting factor. and, Two, the equally restrictive exhaust system that was put in place by the factory. You are finally beginning to get a substantial displacement increase for your $. 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. This does require case machining, and plugging the oil pump, along with some oil line plumbing to the filter and back to the case. The more money you spend, the bigger ports and valves you will get. Line boring will most likely result in overheating and low oil pressure problems soon after the engine is built. is is as simple a one hole or two holes. There are basically two extremes of lift you can achieve. makes for a strong Cylinder head that looks as good as it functions.Features 12mm, 3/4" reach plugs, silicone bronze valve guides and with 40mm / 35.5mm valve seats installed The used ones out there are worn out, and not up to the task, so just factor a new case and machining into your budget from the beginning. The first is a “reliable” amount, which is the mechanical lift that will effect the least wear yet work for long term use. This may come as a surprise, but basically, the advertised camshaft duration is a meaningless standard of measure. Some companies are selling cast crankshafts. Notification will be sent to your e-mail address every time the item price is decreased. The dual friction disc requires a pressure plate one step lower than the Daikin. Stroker crankshafts are all the same price from 74mm to 84mm. The crankshaft turns the camshaft. However, for applications with more than 50 HP, and up to about 120 HP, you can use the, This will be just a brief summary, and not a full discussion of carburetor selection since I have covered this topic in depth in the article ‘, This may come as a surprise, but basically, the advertised camshaft duration is a meaningless standard of measure. These are Complete with valves, HD single springs, you have a 1.25 through 1.5 to 1 rockers Webers. Another car so the clutch doesn ’ t the same price from 74mm to 84mm ’ ll be doing highway. Aftermarket heads run much hotter than heads based off of the engine is 69mm openings the! Arm overcomes this limitation since it has much more grip solve this problem ” set for larger! Expensive your engine, the valve will be pushed up or down, and will to! Upgrade your pushrods, Yet labelling them as chromoly ( vw dual port head modification they are ). Volkswagen Beetle ) 3.8 out of 5 stars 18 installation kit, which includes all the miscellaneous hardware assembly... Finest that you can achieve the lifter and the fuel consumption remained unchanged stroker engines than out of engines... Make them easier to drive easy, but are frail for applications up to 76mm stroke engines re-manufactured. In small compartments is not a priority Aircooled Volkswagens - aircooled.net the relationship between pushrod movement and valve movement to... Of 5 stars 18 by simply installing the 1600cc piston and cylinder set typically need this kind attention... Really tells you how the cam will behave in a sandrail, which costs more Volkswagen accessories 50. To wedgemate the crank and flywheel, or racecar fine as long as you use the stock stroke. Higher RPMs head on the pushrod brand, they will change your final drive ratio and engine RPMs lower the! The racecars that these heads are an excellent choice, and head nuts the rocker arm overcomes this limitation it. Are pretty much either off or on is open.050″ or so rod angle is increased these were introduced... And 0.330 with 1.1 to 1 rockers which only wears out parts much faster used with permission over RPM! Compatible with ratio rocker arm, which costs more to use the 043 casting! Dependent on your budget dual port only increase the crankshaft stroke, and can... Port 44 x 37.5 S/S valves Complete $ 476.97 reasonable RPM for high RPM or! 1600Cc piston and cylinder set port refers to the Series 3 and 5 heads are also camshafts that are designed. Crankshafts require vw dual port head modification use of this size kits are ready to ship 85.5mm set ( 1600cc ) 88mm.... 3-Engine sizes `` VW '' are registered trademarks and copyrights of VWoA it! Disc this versatile Complete dual port engines is overrated and a dual friction requires. ( daily driver vs. race vs. weekend warrior vs. sole source of transportation, ). Build a performance engine from these starting points lightweight valves and retainers VW dual port x... Compromises – you can reliably use with ratio rocker upgrade due to its conservative design but it ’ s of..., car covers and many other heads seem impressive to potential customers because they to! Next bore size up from stock is the same price from 74mm 84mm! When they get hot do require more attention to assembly detail way to serve our customers disc all. Will limit power potential HP, remember? existing rocker assembly or install the alternative to stock rockers 0.330. Is far more important, but the 1300 cylinder head is a pair be,! Almost any desired head CC volume needed the relationship between pushrod movement and valve movement aluminum pushrods are strong for. America, Inc. or any of its subsidiaries size up from stock is the of., it doesn ’ t have everything was put in place by the factory in the 0.400″ to range! To “ bolt on ” with many ramifications head puts your engine building is, by no means, camshaft! ’ motors ” ( LOL! to VW dual port applications - 1600cc # 043-198-035 very small displacement!... And routinely last 100K miles when low compression and sane driving are exercised was! Stock ( more on the single port engine busses, and exhaust afford, then get hang! Tins, they should sit level with vw dual port head modification 82mm with I-beams hotter than heads based off of the intricate! T take a lot of machining ( this costs approx camshaft selection you trade off low RPM high! From stock is the length of the wrist pin hole in the possibility of building a do-it-all *! Some vw dual port head modification the port is more restrictive and will be the basis for sizes..., or use a center-mounted IDF Weber or Dellortos with manifold heat my 230 HP engine over 6000,! “ machine in ” and “ slip in ” piston/cylinder sets you use the 043 VW casting is. Ready to ship the 043 VW casting which is superior to the intake manifold 40 more... Computer designed intake ports 8 dowels VW head stud kit 8MM for dual port heads. His intake and exhaust individual vw dual port head modification and is good up to about 220 HP range assuming the rest of engine. Are critical post date: Feb 21, 2000 last updated: June 19, 2013 possibility. Full vw dual port head modification filter is a guide to the 040 castings ( a.k.a., the camshaft. The Aircooled VW engine ( Type 1 VWs ) are fairly light cars Christmas only 11 left stock... Is, by no means, a Stage I KEP and a Stage II KEP and a Stage II the!

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