01-11-2007, 10:07 AM
Andy Wrote:Duh. Variable valve timing could be adjusted at the cam. I think the Ford Cobra motor did that too.? Ford Cobra motor was DOHC?
Andy Wrote:I can't imagine that you could package 20 pushrods on one side of a motor for the lift part, run oil to the head for locking actuators without running into some real packaging problems. If they went to all that trouble of casting new blocks and heads, they might as well make the thing DOHC with 4 walking cane long camshafts. That would be awesome.
You would only need to run one pushrod per exhaust valve. Why would you need to run two? Also, part of the reason they can even fit a 90┬░ V10 in the first place is because it *is* OHV. Considering they made 400+ hp with a cam in the middle, I doubt they want to spend the money to make new cylinder heads, then redesign the entire engine compartment.
Maybe Jeff can shed some light? Paging Jeff. Please pick up the white courtesy phone. Thank you.
edit: Thayer, that's a pretty sweet method for OHV variable lift. Combine that with some kind of variable timing down low and you'd probably be set.
1987 Oldsmobile Cutlass 442