The K series engine. You are visitor number since 1.

September 1. 99. 9Last update 2. Details on rotor arm spigot fitting Details on fitting distributor cap to converted VVC head. Details of VVC conversion kit. Details of cam fouling and fettling of follower bore tops. ACKNOWLEDGEMENTSThe information contained below is the result. Rover 'K' series engine by myself (Dave.

Spark Plugs. Under the bonnet of your car you have a number of spark plugs. They are connected to the ignition and engine, and work as part of the intenal combustion.

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• Electronic fuel injection is a great means of delivering fuel to an engine. With multiport systems, each cylinder receives its own dose of fuel, and with sequential.

Andrews) and Bernard Scouse - a friendly and. Elise owner who has used his car as a guinea pig for engine developments. Bernard. has a web site here  where. Caterham and Elise. Others. who have provided various engine parts for modification are Caterham and Elise owners Tor Atle, Paul. Ranson , Johnty Lyons, Steve Butts, Mike.

Bees, Mike Dresser, Peter Carmichael, Simon Parker , Rob Day, Ian Coburn, Edgar Shih. Andreas Rektenwald,Luca Adami, Stefan Winquist, Rolf Plus, Stein Oexseth, Simon Thornley. Warren Johnson, Mike Williams and many many others all of whom have heads modified to. He has also done.

Elise for weeks at a time while it was being used as a test platform. Emerald ECU. We hope that the information following may dispel a few of the myths.

K' series engine and answer a few of the questions usually. K equipped cars. If nothing else it may help to show the choices. Neither. Bernard nor myself have any connection whatsoever with any tuning company nor supplier.

There are many Caterham and Elise owners who have been inspired by the details on. DIY. many of these have come to my garage for advice or for some sample port work with them. Some of these are Martin Lewis (Elise), Mick Smith. Caterham), Rob Walker (Caterham), Brian Bannister(Caterham), John Howe (Caterham), Lorne.

Mason, Alan Betts, Dale Cordingley, Simon Kelly , Ray Pearce , Mark Boardman, Julian West. Rob Turnock and many others whose names I can't remember. All have acheived worthwhile. The following two link have been added since.

Fitting verniers and timing cams. Fitting Jenvey DTH throttle bodies. Navigation around the page may be easier using. Engine general. Bolt- on upgrades.

Selecting a head to modify. Cylinder head discussion. Big valve conversions.

Paul Ivey valves. VVC Cylinder head. VHPD Cylinder head. Pictures of standard and modified heads. Black Lips Good Bad Not Evil Download Blogspot. Flowbench comparisons. Graphs of flowbench comparisons. Valve spring caps.

Valve stem oil seals. Camshaft and cam drivetrain. All about cam followers. Solid followers Converting hydraulic followers to solid. Drawing of solid follower conversion shim. Adjustable followers.

Follower weights. Re- using existing followers.

Cam timing, verniers vs. It comes in three displacements, 1. It is a popular engine in motorsport due to its relatively light weight and. The cylinder head is of twin overhead cam design, 4 valve with a. Because of its inherent under- square nature.

Cosworth BDA , YB or Vauxhall 1. As installed in standard form it is well below its optimum. All told it is confusing for the newcomer or the inexperienced owner who does not.

There is the Caterham Supersport kit. MEMS ECU and cam upgrade and includes an airfilter and plugs, the cams. Southern Carburettors do an.

Jenveys single throttle bodies on a custom made manifold, together. GEMS ECU, this retains the standard fuel rail/regulator, injectors. The ECU is a straight replacement for the.

MEMS. The current price of this upgrade is . There are other. . The overall cost of this conversion is around the. The VVC head has larger valves and better porting but it’s. Minister are. experienced in reworking K series heads and SP Performance continue to make almost surreal. At present it is not an easy task to decide what to do to. At a recent Lotus Elise rolling road.

Dave Walkers workshop various bolt- on upgrades were tested and evaluated. The results of this will be published. CCC magazine, it should make interesting reading. To see the results as.

Lotus list on the web click here. The first decision to make is whether you are.

If not then bolt on kits. Solid lifters can be shimmed with the engine in situ but it is. It is questionable whether it is worthwhile using cams with more than 2. Power gains of up to 4. BHP or maybe more can be had by using these bolt on kits. If you. are after more serious horsepower then the cylinder head definitely needs to be removed. Selecting a. cylinder head for modification.

If you are considering modifications to your. When the porting is complete the original head can. Make sure when you buy a. K1. 6 head that you know what you are buying. Be sure to select the right sort of. Low- port heads can be identified by two. The second way to identify a low- port head.

Behind the flange the casting drops down to the top of the. K heads, the drop is only 1- 2mm with the inlet port being visibly higher.

It is not possible when modifying older low- port heads to raise the port. Below is a picture showing the inlet ports from a high- port and low- port head alongside.

Below is a list of casting numbers from the various heads produced for the K series, the. Casting number. Port size.

Head type. LDF 1. K low port. LDF 1. K high port. LDF 1.

K high port. LDF 1. K high port. LDF 1. VVCLDF 1. 06. 97. VVCLDF 1. 02. 90. VHPDThe list is not exhaustive but gives an idea of. The chances are that if your casting.

Make sure you inspect the head thoroughly to. Rover. In particular make sure the head casting is not cracked and that the followers (if. If in doubt reject the head.

Look for excessive recession of the valve seat inserts in the. Buying a bare casting is not always a good economic proposition unless.

Standard K1. 6 Cylinder Head. When the cylinder head is examined it becomes. Good results can be achieved by simply porting. If careful. attention is paid to the port size, valve throat shape and size and to the valve guide. If done in. conjunction with a cam upgrade and suitable remapping of the fuelling worthwhile gains can. Even if the standard cams are retained, torque can be increased significantly.

For serious horsepower, a big valve conversion. Bigger valves retaining the standard. VVC sized inlet valves running in new. VVC head with solid cam conversion (3. VHPD head(3. 1. 5mm inlet 2.

VVC/VHPD head running larger 3. A big valve head used in conjunction with a cam. Big valve conversions.

Paul Ivey (Race Engine Components of West. Bromwich) manufactures superbly designed valves, he can supply oversized inlet and exhaust. K1. 6 head. These are single piece. N stainless steel forgings with tuftrided stems, the inlets.

The valves are of waisted stem design with very low. This improves the flow over the back of the valve considerably; these. VVC head, flow bench comparisons are available by clicking here. These are available ex- stock and despite being.

OEM valves. from Rover. There are some pictures of a standard K1. VVC head and a modified VVC head on the K Head Page.

VVC sized inlet valves can be fitted to the. Paul. Ivey also manufactures VVC sized inlet valves to the same design as the 2. VVC valves are 3. VVC valves. are sometimes difficult to obtain from Rover, without question the VVC sized valves from. Paul Ivey are vastly superior and less expensive, however the ones from the KV6 are.

VVC ones if you must buy from the OEM. The ports need some. No. doubt larger valves can be fitted and I have heard of the K8 (8 valve K series) valves. There may well be a bore/piston clearance problem on the smaller capacity. A VVC can take a 3. VVC head fitted with.

CFM which is a 3. To see flowbench comparisons between the.

K1. 6 head, the VVC/VHPD casting and some modified K1. VVC big valve heads done. For an engine to need the larger 3.

RPM would need to be reached especially on the smaller engines. If engine. speeds of greater than 7.

RPM are to be used on a regular basis careful attention would. There has been talk of instability in liners at these higher RPMs specifically. Rumour has it that the supercharged. Futher below are some words and schematics. VVC valves. If you are not confident in undertaking. The inlet ports are larger by a mm or two and the port angle is. The cam followers are also an.

K1. 6 ones, they also hold less oil.