Holden 6 cylinder head porting bookshelf speakers

Not sure why we dont already have a thread like this, probably no one has bothered. Hand porting cylinder heads on an olds 455 big block with legendary joe mondello horsepower s, e6. Its been decked alot for high comp around 155160 psi pretty sure and has yt double valve springs. These engines were fitted to all australian designed. There was a set of supports on ebay recently but they must have sold as they are no longer there. But the air in the port is moving, like water through a hose. Black engines were fitted to est and efi 6 cylinder vk commodores. Our services include cad design, 5axis cnc porting, engine building and dyno testing take a look at our photo gallery of our range of cnc ported 4 cylinder heads, cnc ported 6. Uncanny how ford and holden 6s shared bore spacing and head bolt location. Porting 202 heads published by holden fan not verified on tue, 08022005 04. Yella terra heads for the holden 6 come complete, assembled with crow cams springs with inner dampener, chrome moly retainers and valve locks, suitable for most streetable cams up to. This engine was dubbed the red motor, after the colour of the painted block, to distinguish it from the greypainted engine used in all previous holdens. Hand porting cylinder heads on an olds 455 big block with.

When serious engine builders blueprint an engine, theyll port or smoothoff rough head castings around the intake and exhaust ports for. Nz automotive distributors is your online outlet for clutches, brakes, flywheels, water pumps and wheel bearings. There is a flat blank section above the exhaust ports. Cylinder head porting problems, questions and technical. Dont worry about the exhaust ports as a small step will stop the exhaust from re. Well look at cylinder heads more closely later, but generally speaking its difficult to get much more than 230 240hp from the twelve port heads, while the old nine port heads can be made to flow enough to make over 300hp. Holden 6 blue motor manifold hp plus ultraflow intake manifold suit ford 250 xflow. Perfecting the art of performance for over 30 years. Cylinder head warehouse 22 brennan st slacks creek, brisbane, queensland, 4127 tel. 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. Mixture motion from quench action between the piston crown and the cylinder head face can be instrumental toward increased torque at all engine speeds. Aussie manufactured holden cast alloy cnc ported heads flow over.

To start viewing messages, select the forum that you want to visit from the selection below. As long as you have a tuff holden 6 and you have a manifold issue this manifold will give you more bolt on power. At part throttle, lack of mixture motion can also have a direct negative impact on mileage. A red head will not match a blueblack head in flow. The holden straightsix motor is a series of straightsix engine that were produced by general motorsholdens in australia between 1948 and 1986. The ford six with a pipemax designed 6 into 1 set of extractors has one of the most unusual, distinctive and beautiful exhaust i have even heard. Lets get right into that, by having a look at the obstacles that stand between swapping the two vastly different styles, 9 port to 12 port. Usually the smaller holden six heads give a higher compression ratio, unless youre talking about the efi 202 in the vk which has smaller, kidney shaped combustion chambers to give a higher compression ratio, i. Features positive stop viton valve stem seals, crow springs, moly locks and retainers, oversize inlet and exhaust valves, fiveangle valve seats, hardened exhaust valve seats, machined throats and custom port and chamber finishing. All heads feature 6bolts per cylinder and use che seats and guides. I havent got a bigger cam or headers i simply want to acheive a nicer flowing head.

While engines from other manufacturers of the same era had head porting that was at least adequate or even too big eg. The head would be complete fitted with seals springs and valves, in my case i always supply the head with 2 valves out so that the customer can inspect before funds are paid. The lump below it, inside the port is quite pronounced. Go back to your post re cam grinding and look at hysteriasresponce. The yella terra legendary alloy 12 port head to suit the holden straight 6 has been re introduced into the australian market. The old commodores ended up having the radiator top tank lower than the cylinder head, so it was easy to get a pocket of air or steam trapped in the head, especially if the cooling system wasnt bled properly. The basic block continued in the next vc model but painted blue and fitted with a brandnew 12 port head, a 2bbl rochester carb, electronic ignition, improved starfire conrods and a fully counterweighted crank. Lsa ls3 factory rocker ls3 l98 l76 ls1 241 casting ls6 243 casting brodix ls3 brodix ls7 factory c5r. The following is a basic guide to cylinder head design dealing specifically with the holden v8 engine. Cleveland or square port bb chev, the 9 port holden head was barely able to feed stock 149 motors.

Nzad provides better parts, better service, better price. Bob krogdahl twin cam crossflow and ohc falcon heads 6. At least 200cfm should be possible with these heads after porting, a figure that is very very. When engine speeds are 5,000 to 6,000 rpm, the need for portchamberinduced mixture motion is far less. High performance cylinder head and billet intake manifold manufacturer for ls, hemi, small and big block chevy platforms. By combining our own cylinder head knowledge and experience, extensive computer simulations, many hours of flow bench testing, consultation with race teams and engine building specialists, chi have developed a number of cnc porting programs for the ls series of cylinder heads.

Afr had also branched out into nascar, porting cylinder heads for top. Does anyone out there know the casting numbers for holden 6 heads. They seal one end of the bores in which the pistons slide, they admit fresh petrolair mixture, provide a space for it to burn, locate the spark plug which starts that process, and they allow waste gases to be expelled. Can someone tell me where to take a bit off metal out of the head to make it flow better. I realise it wouldnt be as good as hand ported heads, and difficult to tell the quality of work without viewing the heads, but whats the general opinion from the people here who have experience with porting. I wasnt sure if it should look smoother and more polished than it does. Every car will be different, the head pictured came from a 98 sunfire engine ln2. Street performance spec holden 202 9 port cylinder head. Ultraflow intake manifolds suit holden 6 red and blue. Aussies are world renown for their resourcefulness and. Hey davidburns, if your thinking of a port job etc. Some cylinder heads are measured from a head bolt boss down to the deck surface.

Pavtek performance engines cnc holden vnvt semi full port cylinder heads price seems fairly reasonable. Id pay that much even now for that, sounds like a good price to me. Our ls 6bolt ports are designed and developed by darin morgan at rehermorrison racing engines. Ive seen a red motor with an alloy crossy head adapted to it. The black efi head is different to the est head, it has no exhaust emission control and has better port work than any of the factory heads. I used it on my first engine for just over 5000ks which was tuned rich for run in so it has a bit of carbon build up on it. Page 1 of 3 cylinder head porting posted in problems, questions and technical.

Holden 6 cylinder red motor engine identification guide. Holden inline 6 blueblack 12 port alloy cylinder head. New holden 6 blue motor intake manifold hi performance. The information below is listed as a quick guide so the user can denote approximatley which series of cylinder heads they have and what is interchangeable. Holden six is 3290ccs, the top equation for that engine would work out to be. Postal address come racing po box 2263 caulfield junction vic 3161. Revised port designs that flow over 30% better than that of the factory 12 port heads with potential for much higher flow figures when professionally ported. Or does anyone know a definate way to identify red heads. Paid for it to be ported and polished etc, new guides, valve seats cut for large inlets. Airflow, airflow measurement, classic mini, cylinder head porting, cylinder head testing, david vizard, flowbench, small bore mini, valve cutting. With run in tune made 99rwhp with stage 1 cam and used to rev its head off. When the eh was launched in august 1963, it was powered by two versions of a completely new 6cylinder engine, the 149 and 179 named after their cubic inch sizes. Holden 6 worked cylinder head suit red 161 173 179 186 202 performance eh lc lj.

Cast iron xu1 heads have been fetching a premium on ebay and finally someone has been motivated enough to make new castings. His engine mods listed may help with some of your questions. Air flow researchs cylinder heads outflow and out horsepower everything in their. Some of the new improvements include a revised port design with an increase of over 30% better flow than the factory 12 port cast iron head. Aside from everything else, a 12 port head has more port volume per cylinder than a 9 port head. The initial grey motor was so dubbed because of the colour of the cylinder block, later motors came in the form of a red, blue, black, and the fourcylinder starfire engine. Lingenfelter cnc ported ls1 ls2 ls6 ls7 ls9 lsa l92 ls3. Sort by chrome bolt kit holden 186 202 six cylinder mirror topz chrome. Looks like its loosely based on a jag 6 head, sounds the goods. Engine bearings, try any rare spares outlet or look up the rare spares. The bigger, later motors were equally asthmatic despite having bigger valves. Clarkos performance has exclusive access to after market holden red cylinder heads.

The 12 port head has triange shaped holes just inboard of the head bolts on the spark plug side of the head, the 9 port does not, but does have two holes outboard of the head bolt hole. After market holden 6 cyl 9 port red heads clarkos. Higgins racing heads have been supplying cylinder heads to major race teams from. Cylinder head porting page 3 problems, questions and. On the nonefi heads this would have a threaded hole leading into the port. Yella terra has reintroduced there aluminum 12 port holden 6 cylinder head into the australian market. Holden 6 cylinder 186 202 thermostat spacer for use with aussie speed rocker covers. L98 heads vs ls2 heads discussion in ve holden commodore 2006. This was my first big build and i am in over my head at the moment. By this stage cylinder head porting and flow testing played a major role in shanes engine development and it started to show, a national record in 6 cylinder hydrofoil class 105mph average and breaking a longstanding world record held by jack roush with a ford, this flowed over v8 supercars, and in 2001 a set of his modified cylinder heads. Quick disclaimer, please read this first what i intend to do here is show and explain to be the best of my ability the different generation holden six cylinder.