This technical paper explains what happens when an upgrade is installed on a stock cylinder head, and what changes you might want to make next to take maximum advantage of that extra boost. Mini 1275cc stage 2 cylinder head mini spare parts mini sport. Cylinder head, 1275, rebuilt sevr0017 seven classic mini parts. This is the special extralength version of the short cylinder head stud to give the little bit of extra threads it needs to allow the coil bracket to be fitted. Cylinderhead porting basics for the home enthusiast.
We supply parts for classic minis made between 1959 to 2000 only. Ghp set of 52 cone cylinder shaped mini sanding engine porting assortment kit. Strange as it may seem, just making the intake and exhaust passages bigger will not always improve performance, and may actually hurt it. Getting the right valves for your classic means knowing your cylinder head.
Cylinder head, 1275 aluminum, cooper sspec, street ported. Weve been working with mini cooper heads for about a year and a half. Porting cylinder heads has long been a right of passage for serious hot rodders. The five golden rules of porting cylinder heads part 7. Tagged 12g202, a series engine, airflow, airflow measurement, classic mini, cylinder head porting, cylinder head testing, david vizard, flowbench, small bore mini. Turbo mini tv building a 10 turbo classic mini the cylinder. How to port and polish cylinder heads eastwood blog. Mini sport specialist cylinder heads and parts, a full range of high quality mini cylinder heads and kits for all road and competition minis. Few other engine builders have the same level of knowledge and skill porting engine heads as david vizard. Cylinder head porting has been an overused term for the last 20 years, and despite all the words written about this process, you cant go more than 10 minutes with any group of hot rodders before someone uses the term port and polished, which merely reveals their ignorance on the subject.
A 1 ball, a 12 ball and a 1 cylinder stone is all that is needed for mini heads. Modifying small block ford cylinder heads mre books. Cylinder head, 1275 aluminum, cooper sspec, street ported c. Allnew aluminum 1275 cylinder head, based on the 12g180512g940 late cooper s head casting. Porting demands the right tools, skills, and application of knowledge. From basic hotrod mild cylinder head porting for that street and strip machine to all out class competition machines where every horsepower matters, youre in good hands with cfm performance. Some engines have the coil on a small bracket which is held to the engine on a cylinder head stud. Cylinder heads are supplied with bronze valve guides and hardened valve seats. You can do it too its basically smoothing out the casting marks and smooth the. Page 3 of 3 cylinder head porting posted in problems, questions and technical. Our extensive range covers standard head studs, rocker studs, thermostat housing studs and bolts, manifold studs and competition head stud kits just part of mini sports huge range of classic mini cylinder head components which covers. This specification of cylinder head, based on used core casting, is modified using the same standards as our race winning 16v and 7 port cylinder heads.
Competition cylinder heads are fitted with bronze guides,hi lift double valve springs and hi flow light weight 3 angle valves on 3 angle valve seats. No additional porting or hand finishing of the cylinder head is required. Specialist components super sport stage 3 cylinder head has been developed as the ultimate fast road cylinder head for the classic mini. We also do 1,2,3,4,6,10, and 12 cylinder engine head work. Find great deals on ebay for mini cylinder head and classic mini cylinder head. Porting cylinder heads allows you to flow more air and unlock hidden. Sc super sport 5 port cylinder head 5 port and 7 port. Preplanning reiterating, the internet is a valuable tool for the novice.
Classic mini engine, cylinder heads, 8 port heads mini. Classic austin mini cylinder head gasket set 1275cc and 0cc engines. Heres a walk through guide as to how i modify a classic mini cylinder head, showing tools and processes involved. Basic porting techniques for chevy smallblock cylinder heads. All the ports are individually optimised for maximum air flow at all valve lifts and they are reproduced in. Classic mini small bore cylinder head rebuilt for unleaded gasoline. I have been thinking alot about how to describe grinding heads and the easiest. Mini spares have a wide range of classic mini engine, cylinder heads. The complex and sensitive shapes required in porting necessitate a good degree of artistic skill with a hand tool.
Specialist components revolutionise the aseries tuning market again with our unique billet alloy 7 port cylinder head. Classic mini engine, cylinder heads, 8 port heads mini spares. Classic austin mini 7 port aluminum cylinder head assembly with valves classic austin mini 7 port aluminum cylinder head assembly with valves. A series engine, classic mini, cylinder head porting, engine simulation, engmod4t, siamese port. Dave and his team have amassed a huge amount of experience and expertise and are now creating some of the best performing cylinder head and cam. A charge that has little motion not only burns slower but also burns less effectively. Mini 1275cc cylinder head cylinder heads for mini mini sport. How does it perform weve run one on the dyno, and heres what the numbers look. Mini cooper cylinder head modifications the old one. The chart below will help you identify which cylinder head your mini, sprite, austin or midget might have. Xtremeamazing new intake exhaust engine porting tool cylinder head snowmobile carbide tungsten. Tagged classic mini, cylinder head testing, engine simulation, engmod4t, flowbench. All mini sport cylinder heads are produced in our own workshops with over 40 years of experience going into each hand built head to give unbeatable performance and reliability.
And if you have questions be sure to give us a call 8009462642. Mini spares article cylinder head identification by. Classic mini cylinder head install the paint has dried and now its time to install the cylinder head to the block. Sc billet alloy aseries 7 port cylinder head 5 port and. Flow bench tests show the alloy head outperforms the standard at all lifts.
Classic austin mini aluminum alloy cylinder head 5 port mini mania. Services range from basic pocket porting and chamber work, to port matching and maximum effort portnpolish for full race applications. Understanding gm lsseries cylinder heads cartech books. Our price includes free shipping to mainland uk no obvious signs of damage but i havent used it so i recommend a rebuild and reface to make sure its good to go. Power tec 10 ep5 david vizards vortec cylinder head porting, duration. I mounted the cylinder head to be tested an aseries head as per austin a35 and later the mini cooper engine on the block with a means of. Great savings free delivery collection on many items.
Used, miele 10660630 classic c1 junior powerline b. The space between the thermostat housing and the valve cover is small, at 116. Porting and flow testing to increase horsepower muscle car diy. Midgetsprite, mini 9481275 with slot drive oil pump. Lack of adequate mixture motion can cut torque output at, say, 1,000 to 2,000 rpm by as much as 25 percent. Knowing this will help you find the correct valves you need. Posts about cylinder head porting written by mowog. Designed using 3d cad modelling and rapid prototyping techniques, with over 200 hours of design time, the cylinder head is machined completely from a solid block of aluminium by the latest technology of 5axis cnc computer controlled milling machine. Mini cylinder head for sale in uk view 36 bargains. Mini tv building a 10 turbo classic mini the cylinder heads. Explore the mini sport range of top quality remanufactured or modified 1275cc cylinder heads. Classic inlines offers professional cylinder head porting for all small six cylinder heads, including stock log and australian 2502v cylinder heads, and our new aluminum cylinder heads. Here at mini sport, we supply a full selection of cylinder head bolts and studs for all classic minis from mk1 to mk5, including mpi and spi models. David vizards how to port and flow test cylinder heads.
If you dont believe me, just search online for cylinderhead porting more harm than good and view the multiple pages of results. Double cut cylinder shape with radius end sf5l4, size. Classic austin mini head alloy 5 port aluminum cylinder head bare. The space between the thermostat housing and the valve cover is 58. Mini sport cylinder heads suit all classic mini applications for road, race or. When engine speeds are 5,000 to 6,000 rpm, the need for port chamberinduced mixture motion is far less. Cylinder head and manifold porting services cfm performance. Cylinder head work page 1 classic minis pistonheads. Classic mini engine, cylinder heads, performance mini spares. In this article well discuss the windsor cast iron cylinder heads, valve size and port shape, and how to improve the performance of these castings.
Porting cylinder heads for better performance is as much an art as it is a science. Mini spares have a wide range of classic mini engine, cylinder heads, 8 port heads available in stock to order online. Our emphasis has been on increasing flow quality rather than just focusing on bulkflow quantity. Here is an area where there is a tremendous amount of potential for success and also failure. Ram pipes with built in filter backplate mounts fits roundnose mini. At some point in the life of your classic mini, austin, sprite or midget, you will need to do a valve job but before you do, make sure you know which cylinder head you have this handy guide will help you identify your classic mini cylinder head according to your engine and then identify the valve and settings you ne. Classic mini cylinder head for sale in uk view 43 ads. It takes a craftsmans touch to shape the surfaces of the head for the optimal flow characteristics and the best performance. All the aspects of porting stock as well as aftermarket. Since the factory l92 cylinder heads were released, one of the hottest topics has been how to convert older cathedral port lsseries. Dave localio is a longtime friend of ours and the owneroperator of headgames motorworks, a cylinder head specialist founded in new jersey in 2001.
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