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By Murray_Calavera · Posted
Did the machinist give any indication as to why the head failed the way it did? -
By Prof_Finesser · Posted
Dropped off head at machine shop he told me probably going to need valves and a new head core. If anyone has a RB25de non vct head please let me know. -
By Prof_Finesser · Posted
So good news and bad head is off. Good news engine is turning again forwards continuously and pistons have very small mark on the top where valves hit it does catch a finger nail going to still ask machinist if it’s ok to run I think they will be ok. On to the bad I took the exhaust cam off because the exhaust valves where the only on the pistons and it seems like my first cam cap (closest to timing gear) was eating into the camshaft and end up stopping it all the valves have the marks in picture. -
Just sent a query to MX5 Mania about a 2.5 swap Asking about sourcing a low km 2009+ engine (the newer the better) that fits the bill, also what kind of testing and inspections are done, plus what supporting mods they recommend for a NA build, like the benefits of cams and stuff As I'm a lazy no talent MOFO, it will be drive in-drive out jobbie And going of used engine prices, I should be able to sell my 2.0 long motor for about the same cost as a newer 2.5, which is nice, plus the 2009+ 2.5 engines have better internals, as in better bearings, forged crank and rods, and much more efficient top end than the 2.0 From my understanding, the added top end power, bolt on tuned 2.0 to bolt on tuned 2.5, is only a 10% gain, it has heaps more kw and torque everywhere under the curve, and you don't need to rev the shit out of it to get it on the boil If a "tweeked" 2.5 swap gave me the same "pull" in the mid range that the K24 with the header and tune that the Euro Accord has in it does I would be more than happy with the swap, and anything more on top would be cream Do the young kids still say YOLO......
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