Shorter runner should reduce low rpm air flow, that's only reason long runners are used but does it really matter? I don't think so, you shoudn't use so low rpm to make power anyway. It would be interesting to see difference on a dyno with a same afr. Would it need 100-200 rpm more to match long runners? Who knows. Anyway, excellent work as always.
These videos of the development work you have done for these engines are always fantastic. I enjoy watching them and I must admit I am somewhat envious although clearly you have brains and the passion, so qudos to you. With those stainless Allen head bolts have considered using a copper washer under the head. Early Jaguars rocker cover nuts were only done up to 4 in lbs with copper washers and never came loose. Or loctite 243 then they definitely won't come loose. But love your work just the same.
Facebook om606 and om605 group are still hating on this. I want to end this drama and i can t find anybody that wants to fabricate the intake tube for this manifold.
All this work on the 606 (which is fantastic), but we here in the diesel hating US, don't have many of these. Would you by any chance have planes to work on some of the 617 or similar engines? (Which we have a ton of over here)
Will not fit 1995 naturally aspirated because of the oil filter housing bolts. Only fits 1998 turbocharged. Cost is over 1000 USD, plus 300 dollars shipping and import tax. 40 hour job to fit (4000 dollars). Use copper antiseize (about 15 dollars) Never use a drill to tighten the lid bolts because you will crossthread all 18 of them. 2.4 inch intake. Pruno
