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Author

Topic

RT104GT
Regular

Location:
Western Victoria
Registered:
September 2004

Re: Preferred Fuel used on 2TG	Tue, 07 September 2004 04:39

CORRECTION: hindesite is a wonderful tool but in 1974 here in AUSTRALIA we only had STANDARD and SUPER FUEL. My original RT104GT had a twin solex carburetted 18RG-R racing engine with very high compression (9.7:1 book figure) On the original Toyota/TRD head with 12 mm head bolts this was terminal. We ran on AVGAS but it was very dry and you need UCL Upper Cylinder Lubricant (all the time) The crap fuel I experienced meant that I ended up wrecking my valves and had detonation problems We fitted a Yamaha head conversion and had to drill and tap the block out to the 14 mm bolt size to accomodate the Yamaha head version with the ULP hardened valve seats which may be more tolerant of ULP but the compression was still too high even with the Yamaha head and re-designed combustion chambers reducing the comp ratio to 9.2:1 instead of 9.7:1 After API brought out twin cam engines in 1984...all was revealed but remember in 1974 I had one of only 2 twin cam 18RG engines in Australia (the other was in a purple RA40GT owned by AMI) and had to get parts, gaskets and advice from Noumea or Vila where there were a few RA40GT running 18RG engines. AMI used to tell me to go away whenever I asked about twin cam parts.. [Updated on: Tue, 07 September 2004 06:20] [Report message to a moderator]

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