Variable hydraulic lifters for 440 engine
The only thing i am doubting about that is that it will increase the dynamic compression ratio again, and my cranking pressure will also go up.
It will, but it will only exist at idle. as soon as the lifters pump up again, the pressure goes down, and with a 3000TC, the transition should be seamless. At Part throttle this is ideal, between idle and stall, this is ideal.
I don't know if a different type manifold would help?
No; I think an open plenum will make it worse. But at your pressure and VP it might be worth a go.
But at that time still the valve would seat around 61* After BDC (compared with the assumption above) which is still late, and might not improve much on the vacuum as there is still heaps of air being blown back.
61* is actually pretty tame, I run 64/65* @.008, and my 367 idles quite happily at 550 rpm, she is such a sweetheart.
i want to ask where did you find the other problem?
Well,
the machine shop I trusted, sent my block out somewhere to be decked for zero with my KB107s. I trusted them both. I never checked it until the engine idled like a pos.
What I found was that, the one bank was running downhill from end to end, and so was the other bank also running downhill, but in the opposite direction; and the banks were not at 90* to each other.
So this was all twisted up and the cast-iron TQ intake I was running, ended up sucking in the valley from both sides because it just couldn't conform.
So I bolted on an old aluminum Excellerator for the summer with a thick gasket, and got away with it. The following winter, I sent the block out to a Mopar shop, who said I need an align hone.
Ok so after they got thru with it, the decks were fairly well straightened up ................ to the now running uphill at the back crank. The rear main seal now leaked, and the wear-pattern told the tail.
But the new RPM AirGap intake sealed real nice.
So the following winter, I took the block back to the machine shop, who denied they screwed up the line-hone, but would be willing to machine a different block that I would bring, for free. Ok said I what about the boring and decking? Oh no, they said, I'd have to pay for that, only a line-hone would be free.
I, politely, declined, and loaded up my crummy block. So I did some research, and found that a 383 Mopar rear rope-seal fit into my 360 with just a bit of trimming. It still seeps a bit, but it's bearable.
The 292 cam was only in there for the first summer.
The plan was to eventually replace the block but that combo runs like a scalded cat, so if it ain't broke, don't fix it.
