Under Slow construction!! all done from home after hard days work.
THE KR1 Head -non vvc, This is my 100% seller, I have not retained the std Inlet Valves in a porting job in over 4years on 16/1800's, so forget your wasted thoughts on porting while retaining the puny 27.8mm Inlet valves of the standard production head! Worth more than any airfilter/sport cat/throttlebody- the KR1 utilises a pair of my own 2mm larger performance Inlet Valves for major flow improvements (made in uk, supporting Uk jobs) With porting, this head flows as well as an unmodded VVC/motorsport casting- see the page- flow fig. comparisons.
The midrange flow change over the modded Std valve version is vast, with the Major advantage of greater port velocity for much improved cylinder filling. This head will give the grin inducing shove in acceleration to limiter lacking in the std 16/1800cc non vvc engines. Flows enough to achieve near 190hp with the right components.
All that, WITHOUT any loss of the nice idle, in traffic manners or other pleasing std car features such as the all important emmisions(provided you retain the catalyst/std cams) come Mot time!! There is also the proven plus of keeping the existing fuel consumption & on many occasions a mild improvement!
So WHY?? The std head was designed for a 1400cc, as such it is ok but Massively undervalved in a 16/1800!! As a comparitive on its puny 27.8mm inlet, the vvc uses 31.5mm, most other manufacturers use 32/33/34mm valves. So what are the possible's, 15hp minimum on a basic 1800 and with all the right additions as in cams/verniers, performance 421, and ecu/remap etc (all sold here!!) 175- 180hp on a phlenum can be achieved(1800) when using our proven cam choices & with a respectable idle.
WANT more?? there are always those who do, Cams are the most often request. Great idea, while my Kr1 is superb on its own, the addition of a proven selection of cam choices will make a great conversion even better!! for those wishing to retain the standard Ecu/mems there are a couple of choices, Newmans Phase 1 grind offering a nice increase in lift- a valuable area with your massively increased headflow- but a not excessive durational change- 8 deg's more than standard- 252 deg/10.15mm lift( std 244/8.8mm)A grind very similar to the Mgft 135/VVc exh but with more lift of .7mm- this grind will retain as much of the cars original character as the std cams but up your hp/Acceleration even further. NEXT, there are the Phase 2's, these have 260/10.15mm lift, so are 16degrees more than std- a similar spec to the piper 633. These will have a respectable idle with even more zing.
Price for these cams is £310 a pair inclusive of delivery and Vat!! a Bargain! One word of warning, uprated cams require accurate timing to get the best from them.
Ok, KR1 cost- £660 Excluding Delivery- Whats in the headwork?? £130 of 8 new 2mm larger performance Inlet valves, £32 of 8 new OE Inlet valve guides- necesary with the larger valves for a couple of reasons, £25 of new valve seals, exh valve redress/reshaping, All required porting, all required chamberwork, Controlled three angle seatwork- see my specialist equipment in the photos elsewhere on the site, check valve seal/lap/blue doublecheck, Chamber Volume checks/faceskim/volume rechecks plus much else besides, Finally a thorough scrub/wash & assembly.
Delivery is based on weight/package size. I use a company based on offering a low cost service, IF your worried then added insurance can be taken out. It takes 30-50 min to properly box a head to counter possible damage- so the delivery includes my time in that area too. Cost £25 upwards.
Within reason I will correct small issues within the work BUT greater oddities/problems do occur, so we will talk this over until a mutual fix/price is agreed before continuing the work. Most common is excess inlet spring seat height variables, ok on std cams but more critical with high lift types or when fitting uprated springs.
I supply most K series required parts, Verniers- I primarily offer Kent cams items for their 5 spoke legs, a good feature to avoid slippage, price £210. Piper/Janspeed exh manifolds,-price on application- asking costs nothing & you could be pleasantly surprised on the savings available, Oe headbolts £60, Oe gaskets, Headgaskets- Landrover Mls £48 & what I class as the best- the Raceline Supersteel, 25% uprated valvesprings- £96.
The KRV Head, VVC. The VVC head is quite efficient, a good size of valves relative to the std 1800 bore of 80mm. But ! It was made to do 'The job' as required by it's manufacturer, so space forGood improvement- more to do with 'Careful' rework of the correct areas, with the aim to finish the job as Rover could have. As a small note; while employed with Janspeed, we were asked by Rover to make changes to the VVC casting. Many porting/chamber/seatwork changes were made/offered BUT rover decided to their detriment, to do as little as possible by taking the easy route- we later found this was part of the VVC160 development, so while people think the 160 casting to be superior, it in fact offers little against the earlier version- see figures in 'Flow Figure comparison'.