How to increase low end torque by porting heads it still. Understanding gm lsseries cylinder heads cartech books. Performance cnc 5axis cnc ported racing cylinder heads. Cnc machines, however, allow you to replicate a particular set of wellported heads over and over again, and in half the time. Mbe cylinder heads and manifolds, mooresville, north carolina. If your engine is to operate at the optimum, the heads must be properly inspected, measured, and corrected if necessary. The colorado all three builds summarized picture book rambletron. Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. All the aspects of porting stock as well as aftermarket. The cncported ls9 heads blend the engineered strength of the ls9 cylinder head design, which is constructed with a356t6 aluminum alloy, with the airflow enhancements provided by gms extensive testing.
The price listed is for you sending your cathedral port cylinder heads 4. Porting is usually done to increase airflow and horsepower at high rpm. The best detailed book about engines is the chevrolet racing engine with jenkins but it from 75. These heads produce surprisingly good flow and performance and are suitable for power builds.
His years of experience have made him a valuable resource for engine builders seeking to optimize power and torque in racing engines. This port is designed for baggers for everyday street ridingcruising, this port was not designed for drag racing. Ultimate ls rectangular port cylinder heads guide rectangular port heads boast a clear advantage in the flow department and are ideal for highrpm, bigcubicinch, and purposebuilt drag racing applications. Pipemax creator larry meaux on race engine head porting larry shares some great porting tips that you can apply to your own engine building projects. History of the ls engine and cylinder head casting number. Whether you race pro stock, super comp, or just want to rebuild your old chevy 350 small block, there are cylinder heads just for you. Although this book covers porting in general, for two, three, four, or fivevalve heads, its a fair bet that most of you are porting something with a. For marketing purposes, it was known as the vortec 5300 h. Lingenfelter cnc ported ls3 l92 cylinder heads pair. Read unlimited books and audiobooks on the web, ipad, iphone and android. The five golden rules of porting cylinder heads part 7.
Ls3ls7 cnc ported cylinder heads reher morrison racing. In addition to our cylinder head and manifold porting and design, we also offer 5axis cnc machining and digitizing services. Mast black label ls3 cylinder heads are designed for all out performance no matter the application. Head casting numbers are found externally at the far right end of the head on the exhaustport side. There are a wide variety of oe, original equipment gm ls cylinder heads that flow excellent numbers and perform right from the production line.
Cylinder head porting services brzezinski racing products. Rhs pro action 21065cc ls1 bare cylinder head 54240 rhs has introduced their new pro action cathedral port aluminum cylinder heads as a premium ls1 replacement head, ensuring great power on any performance or stock engine build. It takes a craftsmans touch to shape the surfaces of the head for the optimal flow characteristics and the best performance. Cathedral port cylinder heads have been mistakenly dismissed by many in lsseries circles for being oldtech. Chevrolet performance ls9 cncported cylinder heads represent a new benchmark in factory engineering high performance, blending the strength and durability of the production ls9 cylinder head castings with the airflow enhancements of precision cnc porting. Although common in the aftermarket, cncporting of the intake and exhaust runners is usually too. How to supercharge and turbocharge gm ls series engines is the only book on the market specifically dedicated to forced air induction for ls series engines.
Purpose built to your needs not an off the shelf cylinder head. The porting and polishing process is broadly the same for all cylinder heads. Porting for late model twin cam heads up to year 2004 castings. Prc cnc porting service cathedral port heads customer. Lingenfelter cnc ported ls1 ls2 ls6 ls7 ls9 lsa l92 ls3. Cylinderhead porting can be accomplished at home with some studying, and is something a novice can accomplish to wakeup engine power. The engine came with flattop pistons for increased compression, and has a unique camshaft. Shop services total engine airflow tea cnc porting. The cylinder head largely controls the allimportant process of burning the air fuel mixture. If you are new to gen iiis, please note that these heads are aluminum and unless otherwise noted, so is every other head in this book. Few other engine builders have the same level of knowledge and skill porting engine heads as david vizard.
Tech port it yourself ls cylinder heads 317 castings photo 1 ls engine swap. Cylinderhead porting can be accomplished at home with some. Prc cylinder heads texas speed and performance, ltd. Each cnc ported cylinder head will have the exact same port and chamber configuration as the original master used to develop the cnc program. Porting cylinder heads has long been a right of passage for serious hot rodders looking to add power on a modest budget. Cnc porting your current ls3 or ls7 cylinder heads. There are a lot of shops that offering porting, or cnc porting, or cylinder head machining. Armed with the right knowledge, the correct tools, and a couple of nights in. Our sst porting is for applications where porting the head is allowed and, because of the application, the cylinder head just doesnt need to be fully 100% ported. Going with the flow a look at ported versus unported ls. However, their thin cross section allows for a highvelocity and smallervolume runner design with excellent flow.
Although it is a truck engine, it used cylinder heads closely related to the ls2 and ls6. Left rear, top of block just forward of the bellhousing mounting surface. Call rehermorrison and get the right cylinder head for your ls engine. By cnc porting the cylinder heads the high cost of hand porting is reduced, plus the cnc porting is more consistent and will produce better results. Porting demands the right tools, skills, and application of knowledge. Total engine airflow is a full service cylinder head machine shop. This book is filled with facts, examples and ways to obtain the best flow possible from a cylinder head. I am not very supportive of seminovice hand head porting of almost any cylinder head especially the ls series heads in that in todays performance parts and shops world the availability of some well designed and performing cnc head programs. Check out this video series on youtube over basic diy porting techniques on ls cylinder heads inside. Cylinder heads with the exception of stock eliminator drag racing and various lower level circle track applications, most racing engines use aluminum heads. Cncporting of the intake and exhaust runners is usually too costly for a factory head. Avoid car repair and service scams evcel vehicle repairs porting cylinder heads has long been a right of passage for serious hot rodders looking to add power on a modest budget. Seller assumes all responsibility for this listing.
Take these heads and have them custom cnc ported by a company like west coast cylinder heads and now. Blueprinting heads involves attention to several areas, including deck surface, intake and exhaust port shape, valve selection, valve seating depth, and. In this groundbreaking book, porting master and engine building wizard david vizard covers all the nuances of porting heads and how to build an affordable flow. Typical gains are 1530rwhp, along with the benefit of a complete professional rebuild. Why is the jenkins book discontinued and smokeys is not. We are among the largest ls and gen 5 lt1lt4specific shops in the country, and we machine and assemble all of our engines, camshafts, and precision race components cylinder heads in house. Chevrolet performance ls9 cncported cylinder heads 19328743.
The range of original equipment gm ls cylinder heads offers decent performance out of the box, the mostly notable of which is probably the l92 head. Ultimate ls cathedral port cylinder heads guide cathedral port cylinder heads have been mistakenly dismissed by many in lsseries circles for being oldtech. Porting cylinder heads might be one of those jobs that many folks will farm out to an experienced pro, but there will all ways be a small contingent of enthusiasts ready. Preplanning reiterating, the internet is a valuable tool for the novice. Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve quantity of the air flow. Personally, we love dirtunderyournails, hardcore diy performance stuff. Some applications are restricted to the stocktype iron heads and valve sizes with no porting allowed, but most applications allow aluminum heads with a variety. If you dont believe me, just search online for cylinderhead porting more harm than good and view the multiple pages of results.
Below we will provide an easy guide to port and polish cylinder heads. And while concerns about durability are logical porting does remove. Since the factory l92 cylinder heads were released, one of the hottest topics has been how to convert older cathedral port lsseries. For a comprehensive guide on this entire subject you can visit this link. When engine speeds are 5,000 to 6,000 rpm, the need for port chamberinduced mixture motion is far less. Upgrade your stock ls3 or l92 engine to the best performing, cast in the us, cylinder head on the market. Founded in 1997 by matt bieneman, president and ceo of mbe, llc, matt attributes. Cylinder head services livernois offers something that most of our competition just cant match, complete in house cylinder head development from start to finish. A charge that has little motion not only burns slower but also burns less effectively. The ultimate chevrolet ls cylinder head test speed parts testing. The ultimate chevrolet ls cylinder head test stock ls1. Cylinder head and porting books page 2 don terrill. As part of your full build or bolt on kit, these will be prime choice to gain the extra power to keep you planted hard in the seat come track day. For a street car, this design means excellent throttle response, torque and average power.
Bolt on a set of fully assembled heads for instant power gains or custom build your engines topend. Everyone knows theres plenty of power to be had from a port job on stock ls cylinder heads, and if youve got the right knowledge its even a job you can tackle yourself. David vizards how to port and flow test cylinder heads. Our stage 1 porting service will include the reuse of the stock vales. History of the ls engine and cylinder head casting number spotters guide. The problem wit porting books is that there are none that actually tell other than a novice anything. This tech tip is from the full book, highperformance gm lsseries cylinder head guide.
The result is a ten percent improvement over the unported ls9 head. Shop services machine shop need a valve job, milling services, welding, cleaning, or other cylinder head machine work. Cylinder heads, as manufactured, are usually suboptimal for racing applications due to design and are made for maximum durability hence the thickness of the walls. Porting cylinder heads generally refers to the process of enlarging the intake and exhaust ports of an engines cylinder heads. How to increase low end torque by porting heads by robert bayly. Ultimate ls cathedral port cylinder heads guide ls engine diy. Performance automotive engine math ebook by john baechtel rakuten kobo. Ultimate ls rectangular port cylinder heads guide ls engine diy.
Perfecting the art of performance for over 30 years. This tech tip is from the full book, highperformance. Cylinderhead porting basics for the home enthusiast. Factory castings are capable of 360 to 400 cfm when ported properly, which can make it difficult to justify an aftermarket casting. Starting with the factory casting from the already wicked zr1, the lme cnc porting program will make your beast breath easy. Ls engine and cylinder head casting number locations block. Gms ls engines are the hottest thing to hit the scene since chevy debuted the first smallblock back in 1955. Pipemax creator larry meaux on race engine head porting. Lack of adequate mixture motion can cut torque output at, say, 1,000 to 2,000 rpm by as much as 25 percent. We meet with two gm powertrain engineers to discuss how to get the best performance out of ls engines using only factory parts and little money out of pocket. With our state of the art haas es54t 5axis cnc machining center and digitizing equipment, mikes racing heads can duplicate your current porting program or design and produce a new porting program for your shop.
1527 218 1291 1274 1131 173 1413 1009 1350 1567 838 144 504 1266 1295 1010 558 699 830 463 910 1473 771 1071 20 1027 13 239 1200 1106 1446 15 870 357 873 397 1371 924 1121 837 804