Chevy Wiki

Difference between revisions of "Opel Straight-6 engine"

Opel Straight-6 engine (view source)

Revision as of 15:27, 3 February 2009

4,853 bytes added ,  15:27, 3 February 2009
m
1 revision
m (1 revision)
 
m (1 revision)
 
Line 1: Line 1:
'''S-TEC''' is a low-displacement engine range codeveloped by [[Suzuki]] and [[GM Daewoo|Daewoo Motors]] for use in micro- and subcompact cars.  
{{Infobox Automobile engine
|name=Opel Straight-6
|aka=Vauxhall Straight-6
|manufacturer=[[General Motors Corporation|General Motors]]
|production=1968–1993
|successor=[[GM 54-Degree V6 engine|54° V6]]
|class=[[Pushrod engine|OHV]] 12-valve [[straight-6|I6]]<br>[[SOHC]] 12-valve [[straight-6|I6]]<br>[[DOHC]] 24-valve [[straight-6|I6]]
}}
[[Opel]] used the [[straight-6]] [[piston engine|engine]] configuration for many years, creating a major family of straight-6 engines for the 1970s and 1980s.


The first model was '''0.8&nbsp;L''' [[Straight-3]] engine, based on the powerplant of the [[Suzuki Alto]]. It was used in [[Daewoo Tico]] and later the [[Daewoo Matiz]].  
==Predecessors==
Opel used two straight-6 engines prior to the better-known modern family.


In 2002, the range was extended to '''1.0&nbsp;L''' and '''1.2&nbsp;L''' [[straight-4]] engines and updated with [[EGR]] valve to reduce pollution. A new engine plant for the updated model T4 was built. The 1.0 version is used in [[Chevrolet Matiz]] and the 1.2 in the European [[Chevrolet Kalos]].
===Moonlight===
The [[Opel Moonlight]] [[roadster]] was the first Opel vehicle with a straight-6. It used a 1790&nbsp;cc six in 1933. It was a 12-valve engine with a very-[[undersquare]] 65.0&nbsp;mm (2.6&nbsp;in) bore and 90.0&nbsp;mm (3.5&nbsp;in) stroke, typical for the time. This engine produced 33.5&nbsp;[[Horsepower#PS|PS]] (33&nbsp;[[Horsepower#hp (SAE)|hp]]/25&nbsp;[[Watt|kW]]) and 100&nbsp;[[Newton metre|N·m]] (74&nbsp;[[Torque|&nbsp;ft·lbf]]).


In 2004 the 0.8/1.0 engines were updated again. New intake and exhaust systems, along with low-friction aluminum [[cam]] followers with rollers were added, resulting in better economy. They are used in [[Chevrolet Matiz]] (model M200).
===Kapitän===
The 1956 [[Opel Kapitän]] was the next vehicle from the company with a straight-6 engine. This was a 2605&nbsp;cc unit with 12 [[overhead valve]]s. Bore and stroke were now [[oversquare]] for high power output at 85.0&nbsp;mm (3.3&nbsp;in) by 76.5&nbsp;mm (3&nbsp;in). A single Opel-designed [[carburetor]] and 7.8:1 [[compression ratio|compression]] yielded 91&nbsp;PS (90&nbsp;hp/67&nbsp;kW) and 186&nbsp;N·m (137&nbsp;ft·lbf).


For 2008, a new 1.2 L version dubbed '''S-TEC II''' is introduced with the new [[Chevrolet Aveo]] hatchback; new features include  chain-driven 16-valve [[DOHC]] [[valvetrain]] and [[Variable Length Intake Manifold|variable intake geometry]].
==1968–1993==
The modern (1968–1993) straight-6 was used in the largest Opel and [[Vauxhall Motors|Vauxhall]] cars from [[General Motors Corporation|General Motors]]. It was displaced by the Opel-designed [[GM 54-Degree V6 engine|54° V6]] in the mid 1990s.
 
These engines were [[pushrod engine|pushrod-operated overhead valve]] units with [[carburetor]]s in the 1960s and 1970s,
but was later fitted with Bosch [[fuel injection]] in the early 1980s.<br />
A special 24v head design appeard on the Carlton/Omega and Senator in the beginning of the 1990s,
this was later turbocharged by Lotus for the 1990s [[Lotus Carlton|Lotus Omega/Carlton]].
 
===2.5===
The modern Opel straight-6 line began in 1968 with the 2.5&nbsp;L (2490&nbsp;cc) unit used in the [[Opel Commodore]]. Still a 12-valve engine, it had a very oversquare 87.0&nbsp;mm (3.4&nbsp;in) bore and 69.8&nbsp;mm (2.7&nbsp;in) stroke. 9.5:1 compression and a single carburettor produced 117&nbsp;PS (115&nbsp;hp/86&nbsp;kW) and 174&nbsp;N·m (128&nbsp;ft·lbf), while 9.0:1 compression and dual carbs produced 132&nbsp;PS (130&nbsp;hp/97&nbsp;kW) and 186&nbsp;N·m (137&nbsp;ft·lbf).
 
In the 1977 [[Opel Monza]], this engine had gained fuel injection[[Robert Bosch GmbH|Bosch]]  producing 130&nbsp;PS (148&nbsp;hp/103&nbsp;kW) and the same 186&nbsp;N·m (137&nbsp;ft·lbf).
The fuelinjected version was also found in both Senator models and the last Commodore model.
 
===2.6===
At the introduction of the 24v DOHC engine in Senator/Carlton/Omega,
the 2.5 increased volume to 2.6 and with a reworked cylinderhead (still 12v pushrod) and RAM Induction it now produced 160 PS
 
===2.8===
The 2.8 was introduced in the first Commodore model.<br />
The carburated version can also be found in the Monza and Senator,<br />
wile the second Commodore also had a fuelinjected version produsing 150PS
 
===3.0===
The 3.0&nbsp;L (2969&nbsp;cc) version was introduced in 1977 alongside the fuel-injected 2.5.<br />
The carburatted version had 150hp, while in the more popular fuleinjected version, the 3.0 produced 181&nbsp;PS (178&nbsp;hp/132&nbsp;kW) and 248&nbsp;N·m (183&nbsp;ft·lbf) in the [[Opel Monza]] GSE and [[Opel Senator]] 3.0E.<br />
Bore was up to 95.0&nbsp;mm (3.7&nbsp;in), but stroke remained at 69.8&nbsp;mm (2.7&nbsp;in).
 
The 1986 [[Opel Omega]] 3000 / Vauxhall Carlton GSi introduced the latest version of the 3.0.<br />
The injected engine produced 180&nbsp;PS (177&nbsp;hp/132&nbsp;kW) and 240&nbsp;N·m (177&nbsp;ft·lbf).<br />
Amongst the chages were larger valves and the change to Bosch Motronic. <br />
It was later used in the Senator and Omega 3.0i.
 
In 1989, a [[DOHC]] 24 valve version with a [[variable length intake manifold]] was introduced, with power increasing to 204&nbsp;PS (150&nbsp;kW) and 270&nbsp;N·m.
 
The Omega Evo had a special Irmscher version of the 24v with an uprated head,<br />
forged internals producing 230PS
 
===3.6===
Irmscher made a 12v 3.6 engine and fitted it to the Monza.<br />
Later, they fitted it with the 24v DOHC head, <br />and put the engine in special Irmscher versions of the Omega A/Carlton and Senator B models.
 
===4.0===
4.0 24v DOCH versions were made both by Irmscher and Mantzel.<br />
The Irmscher version was put in the Omega Evo models, producing 272PS
 
===Lotus===
The [[Lotus Carlton|Lotus Omega/Carlton]] introduced a stroked (to 85.0&nbsp;mm (3.3&nbsp;in) version of the engine displacing 3615&nbsp;cc. Lotus used twin [[Garrett Systems|Garrett]] T25 [[turbocharger]]s and an air-to-water [[intercooler]] along with 8.2:1 compression and custom fuel injection. The turbos were arranged in parallel, each fed by and feeding three cylinders. The company reportedly experimented with a variety of [[forced induction]] schemes, including paired [[supercharger|supercharging]] and turbocharging and sequential turbos, before settling on two small turbos for quick spool-up. The Lotus engine produced 382&nbsp;PS (377&nbsp;hp/281&nbsp;kW) at 5200&nbsp;rpm and 568&nbsp;N·m (419&nbsp;ft·lbf) at 4200&nbsp;rpm.


==See also==
==See also==
* [[GM E-TEC II engine]]
* [[List of GM engines]]
 
==References==
* {{cite web|url=http://www.lotusespritworld.com/LotusModels/LotusCarlton.html|title=Lotus Carlton|work=LotusEspritWorld.com|date=March 5 2006}}
* {{cite journal|title=Lotus Carlton|journal=[[Car and Driver]]|issue=April 1991}}
* {{cite web|url=http://www.carfolio.com/specifications/models/?man=4694&f=6c&f=ci|title=Opel Straight 6-cylinder cars|work=Carfolio.Com|date=March 5 2006}}


[[Category:GM engines]]
[[Category:GM engines]]
Budlight
Bots, Bureaucrats, Administrators
529

edits

Retrieved from "https://www.chevy-wiki.com/wiki/Special:MobileDiff/3759"