jadu

iTrader: (42)

the current gen tacoma chassis has been around since late 2004

Hoovey689

iTrader: (16)

Ok had to double check (wiki I know ). But yes the AM V12 traces it's roots to 1993 and Cosworth helped develop these V12's which were essentially two Duratec 3.0L V6's

Aron9000

The old cast iron 4.3 V6 dates back to the mid 80's. Its the same in terms of bore spacing, stroke, displacement, etc. Its still used in the 2014 van lines, 195hp/260lb-ft torque.


However GM has introduced a new and redesigned all aluminum 4.3 V6 engine in the 2014 Silverado/Sierra 1/2 ton truck lines. Different bore/stroke, different head design(still 2 valve/cylinder, cam in block), all aluminum, direct injection, variable valve timing, variable displacement(ie runs on less cylinders under light loads/cruising). That engine has 285hp/305lb-ft torque.

Despite the different body styles, the new V6 is impressive. The old V6/4 speed auto in a 1/2 ton Cargo van is rated at 14/19mpg, the new V6/6 speed auto in a basic 1/2 ton Silverado work truck is rated at 18/24. Both are 2014 models.

Aron9000

This has not been true since GM introduced the LS1 V8 in the Corvette back in 1997. In the next 4 years they introduced derivatives of the new LS1 V8 in the van/pickup/suv/Holden lines. This Gen III architecture killed off the original 1955 small block chevy's 40+ year run. Now all current GM products use the redesigned "Gen IV" architecture, which boasts many changes over the old Gen III stuff started back in 1997 with the LS1. The newest 2014 Corvette engine using the LT1 monikier is considered "Gen V", soon all the V8 trucks/Tahoes/Vans, etc will be powered by different displacement "Gen V" motors, with such adavances as direct fuel injection, variable, valve timing, multiple cylinder displacement. Yet all of these engines still use a single cam in block, two valves a cylinder.

Read, read, read, and read some more about how GM has been kicking everybody's a@@ with what many snobs would call "obsolete". The aftermarket for these engines is simply incredible. Bolt one into a lightweight body, like a Corvette, or a late 90's Camaro or Trans Am, and they simply fly.

http://en.wikipedia.org/wiki/GM_LS_engine

Toys4RJill

The Toyota 70 series is probably the oldest generation of any Toyota product still on the road today. Although parts here and there have changed over the years.

The 4.0 V6 in the trucks and SUVs is still used.

mmarshall

That is primarily what I was refering to. That configuration, of course, (and part of the block itself) goes back to the original 265 cid V8 of 1955. But you are correct that there have been many modifications over the years. Another very old GM design that had many modifications, but was used for many years after its early-60s introduction, was the 90-degree 3.8L V6 used by Buick and Pontiac. It was once quite unrefined and rough-running, but, over the years, ended up almost as smooth as a V8....and the turbo versions, of course, gave it extra spunk.


No arguments there. GM has often been criticized in the auto-press for sticking with push-rod designs, but the proof is in the pudding.

Hoovey689

iTrader: (16)

New Vette is no joke even against competitive DOHC's

Personally I'm a huge fan of the Ford and Lexus 5.0s

Aron9000

ONCE AGAIN you are inncorrect/misinformed. The ONLY thing carried over from the "Gen II LT1" to the Gen III "LS1" architecture was the bore spacing of the cylinders. That was it. Other than Ed Cole's original idea of cam in block, pushrods, and two valves a cylinder, these engines share nothing in common.

The way the block is made between those two engines is very different. 2 or 4 bolt main caps vs 6 bolt mains on the LS1. The oil and coolant passages are entirely different. The cylinder heads are completely different. As a result, there are ZERO parts that interchange between the old small block chevy and any 1997+ LS1 based car/truck. If you've ever tore one down or looked at pictures of various engine parts, you can see they aren't even remotely related, other than being V8 engines.