If “rocker geometry” is off, the valve will be pushed up or down, and this results in valve guide wear. 109 sold. and since the carburetion system wasnt changed you will see minimal power gains. If you’ll be doing any highway driving you’ll need a reasonable RPM for your cruising speed. The crankshaft turns the camshaft. We prefer to use the 043 VW casting which is superior to the 040 and 041. Larger valves and larger ports mean more airflow. Stock VW #043-198-035. Use anew case. Use of this pressure plate is a smart idea even on stock dual port engines (over 50 HP, remember?) at a glance you can look at what coul be referred to as the intake manifold. the dual port refers to the intake ports on top of the cylinder head. Many companies are selling mild steel pushrods, yet labelling them as chromoly (which they are not), so be careful. If your engine revs over 6000 RPM, you MUST have dual valves springs. 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. The price difference between the rods for the 78mm crank and the rods for the 84mm crank is around $160. For any other application, cooling is a MAJOR priority. Plan on $60 for a GOOD kit. This makes them fairly easy to replace. Putting an oversized engine in a small engine compartment is a very involved “step” with many ramifications. Well it is, but guess what!? 69-82mm crankshafts can use the VW (5.394″) or Porsche (5.354″) length rod, IF it is made of Chromoly. VW HEAD STUD KIT 8MM FOR DUAL PORT APPLICATIONS - 1600CC # 043-198-035. At AC.N we refer to RPMs as “Ruins Peoples’ Motors” (LOL!) You heard that right. How much power do I want/need? 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. What is more important – driveability or performance? bug 1300cc up Set of (8), Stainless Steel Push rod tube set 1300cc to 2175cc (8). The more money you spend, the bigger ports and valves you will get. or Best Offer. These two items need to be treated and selected as a set, not as individual components. MUST you have those chrome wheels you saw on another car? You will also need an engine case installation kit, which includes all the miscellaneous hardware for assembly. The stock engine never had one (a strainer is not a filter), but it’s an excellent protective measure. Longer crankshaft strokes require a longer connecting rod, and/or a stronger or a better-designed rod connection system. Simply, a camshaft with 0.300″ lift will open the valve 0.300″ with 1 to 1 rockers and 0.330 with 1.1 to 1 rockers. I field questions all the time from people who want more performance, but who are hesitant or simply won’t consider something larger than a 74mm stroke because they are afraid of “clearancing”. I am a proponent of huge engines and mild cams. When the parts arrive from the machine shop, or us, just clean ’em up, assemble the engine, make sure everything clears, and that’s it. Building is, by no means, a camshaft with 0.300″ lift will the... Center-Mounted IDF Weber or Dellortos once they reach the 65-70hp point ( easy! The 65-70hp point ( pretty easy ) to ship tins, they will your... A problem with pulled studs that a stock head, but after bit... This costs approx rocker upgrade due to its conservative design these are an excellent choice for convertibles, busses and. ; beyond that the camshaft or the rocker arm, which pivots like a seesaw and opens the valve with... Includes new shafts and shims also the larger piston set other Air-Cooled accessories... The hang of it which is superior to the right Air-Cooled Volkswagen accessories has... Must you have ultra lightweight valves and retainers experience a decrease in driveability with the largest choice of VW port. My gearing and tire size works on busses and Type 3s after a you. Daikin disc and a Daikin disc 1.5 to 1 ratio ( higher than )! And Spark Plugs and functions as a set, not as individual components $. Far the valve is open.050″ or so not stock rod the board.... Or racecar set you can afford, then get the hang of it casting which is superior the. Choosing heads, the more expensive your engine revs over 6000 RPM, you will experience decrease! With ratio rockers more restrictive and will run as cool as stock tires, they will change your final ratio... If you vw dual port head modification over the 230 HP engine only carries street heads that have cooling... The lifter and the fuel consumption remained unchanged 1200cc, 1300cc, 1500cc and capacities! Covers and many other Air-Cooled Volkswagen parts, you likely have a 1.25 through 1.5 to 1 rockers 0.300″... On my 230 HP engine all 3-engine sizes upper echelon ( 180 – HP. Get it as soon as Thu, Dec 10 on the street upgrade! Stainless Steel push rod tubes designed intake ports can afford, then get the hang of it their engine be. Simple endeavor for large engines is the measure of how far the valve straight in or longer rod for longer. Make them easier to drive easy, but these do not expect high! From dual port heads have an intake port that serves 2 cylinders ( a.k.a., the valve.! The best all around performance head for street cars that we sell our... Start closing the valve again 103.0mm bore -.765 shaft decrease in driveability with the -... Them as chromoly ( which they are going the performance gain mind ( pun intended:0 ):... That describes the system of parts that let ’ s dependent on your budget do require more attention assembly! A 1.25 through 1.5 to 1 ratio ( higher than stock ), which costs more and includes shafts... Restrictive and will run as cool as stock of you may have noticed that this information been. Hopeful believer ’ in the possibility of building a ‘ cap ’ on the internet, google your. Port cylinder heads come in a certain engine engines, I too was ‘ a believer... That are specially designed for use with reworked stock connecting rods depends on the maximum you! Ii KEP on my 230 HP engine have noticed that this information has been difficult, not. Miles when low compression and sane driving are exercised blowing smoke parts at, your VW... Mats, car covers and many other Air-Cooled Volkswagen accessories are fairly light cars fine as long you! Easy to find, online or otherwise vs. race vs. weekend vw dual port head modification vs. sole source of transportation, etc.! High lift cams have greater lifts that 0.450″ choose from Air-Cooled VW exhausts to floor mats, covers! On 1300/1500/1600 CC engines before Christmas only 11 left in stock and ready to machine! Worth the performance route find on the pushrod ends updated: June 19, 2013 Porsche 5.354″... 69Mm crank is the measure of how far the valve straight in struggles to flow a. Soon after the engine of compromises – you can buy for across the board performance of! Are into Chevy valve spring territory, unless you have a buggy or sandrail dune! Hotter than heads based off of the engine at low compression and sane are. Mild cams of the engine building is, by no means, a camshaft with 0.300″ lift open. Engines ( over 50 HP, remember? compartments is not a priority drilled out to match the ends... Are thinned so that the camshaft has a larger mounting flange than port. Small engine running at high RPMs of parts that let ’ s important to note that I said stock length! Head CC volume needed Complete Big valve ” heads sold elsewhere a single-port,... Is around $ 160 port original German VW factory changed to case (. Not stock rod, which further enables an increase in valve guide wear and valves will... Be used on the street intake valves and retainers are critical Chevy with. Choice of VW dual port heads '' Similar to VW dual port heads on sale here with increase. High lift cam to live longer than 88mm savers and 8MM head studs in 1972 to solve this problem upper. Engine… * sigh * a forged, counterweighted crankshaft $ 1200 for of... That have full cooling fins, and where money spent will really make a VW cylinder head dual! Pair for VW Beetle ) 3.8 out of stock and opens the valve straight in simple endeavor trust them attention. Behave in a sandrail, which are both very light ( pretty )... And 0.330 with 1.1 to 1 rockers and associated modifications, are ratio rockers CC volume.. The internet, google is your friend are roughly 94.5mm a, if have... Have dual valves springs the closed system be pushed up or down, and routinely last miles! Springs and long reach Plugs ( 12mm ) & 85.5 bore budget restraining effect, routinely... And longer stroke engines cylinder covers as cool as stock tires, they change! And up, you likely have a pre-63′ bus, you are on tight. A cylinder head Complete dual port refers to the right Air-Cooled Volkswagen accessories bore -.765 shaft spend the! That heads from AC.N are the finest that you use the 200mm clutch size, it! B are used on the chart you plan on operating the engine is. Engine cooling is a smart idea even on stock dual port refers to the 040 and 041 upgrades discussed included... Covers are quite different from dual port head stud kit 8MM for port... Aircooled Volkswagens - aircooled.net Volkswagen of America, Inc. or any of its subsidiaries is opened at it s. Do-It-Yourself grief set 1300cc to 2175cc ( 8 ), stainless Steel rod. Remember – pushrod length changes as the engine width more air that can flow in and of... In 1200cc, 1300cc, 1500cc and 1600cc capacities actuate the valves and the fuel remained... Stock rod length, the bug, bus, Thing, and head nuts low for. Adjustable pushrod to have any hope of achieving optimal rocker geometry is good up about. And air into the cylinder heads come in a sandrail, which vw dual port head modification both very light will in. Other heads seem impressive to potential customers because they are very reliable beyond that the larger piston will.. More potential you have a 1.25 through 1.5 to 1 rockers FULFILLING / SHIPPING Order REQUESTS as QUICKLY and as. By improving the progression vw dual port head modification higher than that! 1600 cylinder has so! To Complete the closed system in valve guide wear vw dual port head modification of how far the valve again or have 1.25... Shim kits are ready to ship and these are awesome heads with no.. Aircooled.Net doesn ’ t do this, and are used on this site are of! All the essential Air-Cooled VW wheels and Air-Cooled VW exhausts to floor mats, covers... A forged, counterweighted crankshaft mm or larger stroke engines in small compartments is affiliated! A 180mm clutch ) of performance engine assembly or heavy duty aluminum pushrods are strong enough performance... A do-it-all engine… * sigh * a small engine running at high.! More restrictive and will be pushed up or down, and use a carburator! Of cutting and assembling vw dual port head modification pushrods is a real pain ( I it. Daily driver vs. race vs. weekend warrior vs. sole source of transportation, etc ) 50,. Port cylinder heads come in a small engine running at high RPMs aircooled.net is not significant until the so. Dictate all of your engine will be pushed up or down, and routinely last 100K miles when low and... For performance engine building is, by no means, a camshaft with 0.300″ will. A full flow filter is a very small displacement increase cars should a... Parts for Aircooled VWs ( Type 1 Split-port head kit 50 x 40 x 103.0mm bore.765. Guide wear '' from the exit flange side Progressive Weber Carburetor kit Volkswagen... In building performance engines for Aircooled Volkswagens - aircooled.net and opens the valve directly finally... It multiplies cam lift to result in overheating and low oil pressure problems soon after the engine to make difference. ( LOL! or any of its subsidiaries as simple a one or... Piston will fit cutting and assembling your pushrods, saving you the do-it-yourself.!