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Toyota R engine
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==== 18R-G ==== [[File:18R-GUengine.jpg|thumb|18R-G on an engine stand]] The 2-valve [[DOHC]] '''18R-G''' and its variations were produced from 1973 to 1982, replacing the [[#8R-G|8R-G]] and providing a performance engine which took advantage of the entire 2-litre limit of Japan's "[[Vehicle size class#Japan|small car]]" class.<ref name="TC27"/> While most 18R-Gs had a head designed and made by [[Yamaha Motor Company|Yamaha]], a very few had Toyota heads.{{Citation needed|date=June 2009}} Yamaha's tuning-fork logo can be seen on the Yamaha heads. Except for the head and related timing components, most parts were shared or interchangeable with the SOHC 18R. Combustion chambers were hemispheric. [[File:18rg.jpg|thumb|18R-G in an engine bay]] In 1975, air injection was added to the Japan-market '''18R-GR''' for improved emissions. This used Solex carburettors.<ref name="TC27"/> A [[fuel injected]] and catalyzed Japan-market version, the '''18R-GEU''', was produced from 1978 through 1982. There was also a catalyzed carburetted version, the '''18R-GU'''. [[File:Bigmikemunizrallycar.jpg|thumb|1973 TE27 Rally Car with a 152E TRD Race Engine]] Competition versions of the 18R-G and -GE include those used in rally Celicas of the period, one of which finished second in the 1977 [[RAC Rally]]. These had 4-valve heads and were called '''152E''', they were of {{convert|89x80|mm|2|abbr=on}} bore and stroke and {{convert|1995|or|1998|cc|CID|1|abbr=on}} (depending on the source).<ref name=TC1>[http://www.3sgte.com/page_27.htm ''Toyota Twin Cam''], p. 25</ref> The [[Group 4 (racing)|Group 4]] [[rallying|rally]] version of the 152E had two twin-choke carburettors, and developed {{convert|240|PS|kW hp|0|abbr=on}} at 9000 rpm.<ref>{{cite web|url=http://i58.photobucket.com/albums/g250/71TA22/Stuff/RA40Rally-1.jpg |title=Toyota RA40 Celica, Modified 18R engine |accessdate=2011-11-08}}</ref> Higher tuned engines developed as much as {{convert|300|PS|kW hp|0|abbr=on}} at 9,200 rpm. German racing team [[Schnitzer Motorsport|Schnitzer]] also developed a [[Toyota Celica LB Turbo|turbocharged silhouette racing version]] of the Celica,<ref name="TC1"/> to take on the [[Porsche 935]]. With a [[KΓΌhnle, Kopp & Kausch|KKK]] <!-- a defunct German automotive parts company, not the Ku Klux Klan --> [[turbocharger]], the [[Group 5 (racing)|Group 5]] Celica developed {{convert|560|PS|kW hp|0|abbr=on}} but reliability was less than satisfactory.<ref>{{cite web | title = Bigger Than Life: The Schnitzer Celica | url = http://speedhunters.com/archive/2009/02/19/retrospective-gt-gt-bigger-than-life-the-schnitzer-celica-turbo.aspx | author = Chong, Rod | publisher = Speedhunters.com | date = 2009-02-19 | accessdate = 2011-01-31 | url-status = dead | archiveurl = https://web.archive.org/web/20110119170131/http://speedhunters.com/archive/2009/02/19/retrospective-gt-gt-bigger-than-life-the-schnitzer-celica-turbo.aspx | archivedate = 2011-01-19 }}</ref> {| class="wikitable" |- ! Code ! Power ! Torque ! Years ! Weight ! Comments |- | 18R-G<ref name="twincams"/><ref name=retro18R/> | {{convert|145|PS|kW hp|0|abbr=on}} at 6400 rpm | {{convert|18|kgm|Nm lbft|0|abbr=on}} at 5200 rpm | 1972β1981 | {{convert|170|kg|lb|0|abbr=on}} | |- | 18R-GR<ref name="twincams"/> | {{convert|140|PS|kW hp|0|abbr=on}} at 6400 rpm | {{convert|17.2|kgm|Nm lbft|0|abbr=on}} at 4800 rpm | 1973β1975 | | low compression for regular fuel |- | 18R-GU<ref name="twincams"/> | {{convert|130|PS|kW hp|0|abbr=on}} at 5800 rpm | {{convert|16.5|kgm|Nm lbft|0|abbr=on}} at 4800 rpm | 1975β1978 | {{convert|182|kg|lb|0|abbr=on}} | emissions control β Japan. |- | 18R-GEU<ref>[http://www.3sgte.com/page_9.htm ''Toyota Twin Cam''], p. 7</ref> | {{convert|135|PS|kW hp|0|abbr=on}} at 5800 rpm | {{convert|17.5|kgm|Nm lbft|0|abbr=on}} at 4800 rpm | 1978β1982 | {{convert|166|kg|lb|0|abbr=on}} | EFI, emissions control (Japan). |} Applications: * 1973β1981 [[Toyota Celica]] GT 2000 * 1982β1983 [[Toyota Celica]] GT 2000 (RA63) * 1974β1983 [[Toyota Carina]] GT 2000 * 1978β1983 [[Toyota Camry|Toyota Celica Camry]] GT 2000 * 1973β1982 [[Toyota Corona]] GT 2000
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