Glenn Beck ad for Chevy Malibu...

Says, "The engineers at GM said they do it with Variable Valve Timing". I shook my head and wonder why someone didn't think of it before"

Um, my '85 Corolla GTS has Variable Valve Timing. So did my '95 Tercel.

Is GM licensing it from Toyota?

Reply to
hachiroku
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Preaching to the choir, my friend...

Reply to
hachiroku

The idea of variable valve timing is not new, as you point out. Ford used it on the Zetec engine on its Escorts, Contours and Mondeos in the 90s.

I don't see why GM would have to license it from Toyota, unless there are patents involved.

Jeff

Reply to
Jeff

Or there's some kind of agreement with Toyota due to NUMMI. According to Beck, GM calls it VVT...

Reply to
hachiroku

But they lack GM's advanced pushrod technology.

Who's Glenn Beck, and what races did he win?

Reply to
beerspill

A motor mouth! And he won the race to CNN.

Reply to
Retired VIP

Actually, the Corolla GTS had a variable intake manifold, where it would switch between runners depending on RPM.

Reply to
Ray O

Hmmmm...I knew there was something like an extra venturi that kicked in ~4,400 RPM, but I thought I saw somewhere it had VVT, also.

IIRC, something like a centrifugal clutch on the (looking towards the rear of the car) left side cam that changed Intake timing.

I never had the covers off, but if I decide to keep it, they'll be coming off soon...

Reply to
hachiroku

Now it came back to me... The system on the Corolla GTS was called TVIS, or Toyota Variable Induction System. VVT, or Variable Valve Timing, came later

Reply to
Ray O

That was it!

There's this:

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And here's an excellent discussion of the 4A-GE and the 7M-GE (hmmmm...)

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Reply to
Hachiroku

The second page looks like something from the new model highlights we used to get every year. Only a few of us read it though...

Reply to
Ray O

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