"uncle_vito" > wrote in message
...
>
> "Dad" > wrote in message
> .. .
>>
>> Why do you need an electric cloth top? On the other had I do like the
>> hard (soft) top on the SC300, looks sharp. Actually the convertible looks
>> much better than the coupe and for some reason it does not show all the
>> add on scoops/vents.
>>
>> Still lust after its VVT and DI in a push rod engine. Just a few reasons
>> and the first is the amount of sensors on the DOHC with VVT and DI, each
>> head gets 4 camshaft sensors and cam position sensor actuator and all the
>> wires for same. Plus all the added bolts and screws to just hold it
>> together. Eighteen for the DOHC and 4 for the push rod valve covers. Now
>> lets talk timing chains, one for the old pushrod and three for the DOHC,
>> 9 sprockets in place of 2 and the worst part is well over 400 link pins
>> to wear on 3 chains with 16 timing marks versus one. All that to get rid
>> of the 16 push rods. Plus the engine gets less MPG than my old school C6
>> with none of that crap. The only thing I like about the DOHC is the red
>> line, sounds good at 7,000 but not worth the cost.
>
>
> But the Toyota V-8 is an engineering work of art that does not develop
> valve float at high RPM nor needs cam destroying spring pressures to do
> it. Just as well that GM sticks to OHV engines. With the 'complexity'
> of DOHC, the C7 would never be out of the shop.
By the time valve float would happen, which it don't when computer
controlled, your Toy would be two counties behind. Sorry, try again.

Just to let you in on where I'm coming from I drive what I'm talking about.
How about you?