I think I need to respond to these points since they are simply ridiculous and malicious rubbish and more lies.
The chief difference between scholar and dva building a bottom end is that scholar always use the FAI bolt done up to 60lbft, as they do when they machine and hone the blocks with torque plates at their factory, Whereas dva will always use OE type grade 8 bolts done to the factory setting - ie 20NM +180+180 which equals 40NM , approximately 30lbft - HALF THE TORQUE SETTING WITH WHICH THE BLOCKS WERE TORQUE PLATE HONED!!!
MINDBOGGLINGLY STUPID IN MY UNCLE’S WORDS.
You have never seen me assemble an engine so you cannot possibly know what methodology I use to fix the head bolts, nor are you privy to my conversations with Scholar so it is all just malicious conjecture that suits your purpose of trying to discredit.Just as all the previous posts have benn proven to be.
Firstly that is not the method that I use to tighten the head bolts on Scholar blocks, and secondly when checked after tightening the equivalent torque setting is 58-60lb/ft, which is pretty close to that used by Scholar. I have just checked each bolt on two engines I have just built with a Snap-on torque wrench and it too gives readings of 58-60lb/ft. Why I bother wasting my time on things I know to be garbage I don’t know.
Valve seats…, every valve I put into a head is individually cut with Neway cutters and lapped to give a perfect circumferential seat. Each individual valve is subjected to a drop test, a spin test and a light test to ensure a perfect seal, engines with leaky valves do not make 180lb/ft of torque.
I am absolutely fanatical about proper lapping of each valve as anyone who has been to my workshop will testify. Some have lapped their own valves and will know how hard a task master I am in ensuring that each seat is perfect.
Seats that are badly cut will never lap and it is in my own interest to ensure that the seats are accurate because it makes the lapping much easier.
Valve stem seals are fitted with a specially designed tool that guarantees that they are palced centrally, there is litt oppoortunity to get it wrong since they are a simple push fit onto the end of the guide. I’ve fitted thousands of them and they are dead easy. I cant really see how it is possible to fit one wrong.
If the heads are so badly prepared, please explain how it is that my engines hold the power records at every capacity from 1600 to 1900 at Emerald.
When I assemble engines it is done with the full knowledge of and in 90% of cases under the eyes of the owner who can see for himself the care and attention that goes into a build, having seen the photos and results of one of your builds I am surprised you feel able to comment.
At least my engines do not have the crank and rods hitting other parts of the engine (at hand cranking speed) nor are they full of swarf , nor do any of the compoents show eveidence of being hit with a hammer to provide clearance.
If the valves are bent I�m willing to bet that they have kissed the pistons, probably because the pockets on the pistons are not properly sized or the cam timing is wrong. Since none of those engines were built by me you cant really hold me responsible for valve piston contact.
Valves do not bend when they have poorly fitting seats, they �flex� and eventually fatigue causes the head to detach, mostly they hammer into the seats. If the seats were so bad that the valves bent when they hit them they simply would not seal and the engine would have little compression.
I have cut seats now on more than 800 cylinder heads , even the most incompetent person would have got the hang of it by now.
However 8 of these 9 heads are shot and some have failed in very short order - ie 500 miles, which is too short a period for the softening to occur in the understood manner - ie the heads were supplied soft by dva
No, if they are VHPD heads they are customer supplied, it�s that simple. I have been hardness testing heads since 1998 either at a local facility that specialises in hardening or at my own workshop.
I mark the engines I build with a number and indeed the heads, so it shouldnt be difficult for you to give us those numbers and the customers names so everybody will know what is what.
I’m glad we have now cleared up that none of the engines in that photo were built by me. And as far as I can see it you claim to have two engines that were and 9 heads. So lets have the details and the customer names.
Dave