whatudrivin

This isn't a 928 video but I thought it was neat to see the valves and lifters in action at 14000 rpms. It really gives you an idea of what's going on in your motor. As the rpms rise you can actually see the valves and springs rotating and the camera is too slow to register the movements of them.

Mark Anderson

pretty amazing. Hard to imagine 20k in a F1 motor

Leon Speed

BOOM!

17prospective buyer

I saw that video a while ago and it was truly amazing. I think it's the best video to hit home how important/effective ignition or valve timing becomes at high speeds. Right now in college we are experimenting with timing effects (both valve and ignition) on a glass engine, so it is very similar to this cutaway, and very very cool. You can really see the effect of valve rotators in the second one.

mark kibort

so funny that our motors, are much shorter of a stroke then the masserati 4.5L v8s.

they are 84mm stroke, 2mm greater stroke than our 6.5liter strokers, yet only 94mm diameter. (1mm less than our 4.5liter 928 motors). they spin up 7500rpm, stock! no oiling issues? what gives.

Rob Edwards

Mark-

6.5L strokers are 95.25 mm. A stock GTS has a longer stroke (85.9) than a Maser, if in fact its stroke is 84 mm. But modern Masers are 92 mm bore, 80 mm stroke- typical modern oversquare Italian engine- good for revs, bad for torque. Barely more stroke than a stock 4.5L 928 motor.

There is no modern 4.5L Maserati engine. Unless you are talking about the 450S, which I would much rather own than any 928.

So none of the numbers you quote are correct. Wait, was this some sort of Tom Sawyer trick to get me to do your due dilgence for you?

Imo000

Cool clips!

Couple years ago had a project car with a clunking engine. Before pulling it, took the oil pan off, revved it up and looked under to see what it looks like. The crank and the conecting rods whipping around, even only at 3K, was really something else.