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Location:
Hobart
Registered:
June 2002
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 18rg clarifications, solexes & fuel
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Fri, 01 August 2003 03:27
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Hi, after searching the forums i know both these topics have been discussed in detail, however the conclusions are unclear.
I have an 18r-g... that is the early 145hp 9.7:1 CR. Now this was produced before japan went to unleaded fuel, right?... so this doesn't have hardened valve seats (unless it was rebuilt with them), therefore needs upper cylinder lube?, so you shouldn't run straight PULP, ULP. ... however, they all have alloys heads so does this mean they do have hard valve seats?
also, the solexes. Did the early 18r-g come with 40mm or 44's? mine has main jets with 170 and 145 stamped on them. A mechanic told me today that i had the "baby" carbs (just by looking at them), from 18R-GU and that i should rejet the carbs to get more performance. I haven't measured my carbies since i haven't had them off. He was suggesting the early 18r-g came out of the factory with bigger than 40 carbies.
anyway... doesn't any of that make sense?
Cheers
Chris
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Location:
Sydney
Registered:
January 2003
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Re: 18rg clarifications, solexes & fuel
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Fri, 01 August 2003 04:03
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Dont quote me on any of this, but this is what I've read around a few places. You cant run your 18R-G on ULP as it only has 91 RON(octane). I thought you would be able to use PULP 98 RON Petrol in any older car, but I've got a list(from shells website) below & the 18R-G isn't on there so I dunno....maybe someone on the forums is using it with/without problems...anyway hope all this helps. To use PULP 98 RON Petrols in a leaded car you also need to use valve seat protection additive in with your petrol. I've taken a screenshot from the Shell website, pretty useful.
Toyota Celica TA20 engine 2T 1972-1977
RA60 engine 21R-C 1981-1983
SA63 engine 2S-C 1983 on
RA65 engine 22R-C 1984 on
Corolla AE71/80/82 engine 2A-C, 4A-C 1981 on
Sprinter AE86 engine 2A-C, 4A-C 1981 on
KE1/2 engine K, 3K, 3K-H 1972-1974
KE38/55/70 engine 3K-C, 4K-C 1974-1984
RT133 engine 21R-C 1979-1983
ST 141 engine 2S-C 1983 on
RT 142 engine 22R-E 1983 on
Corolla Liftback KE50 engine 3K-C 1977-1978
T18 Liftback TE72 engine 3T-C 1979-1983
Camry SV11 engine 2S-E 1983 on
Corona RT132, RT133, engine 21R-C 1979-1983
Corona Mk2 MX13, MX23, engine 4M 1976-1977
Cressida MS65 engine 4M 1971-1976
MS83, MS85, MS111 engine 4M 1970-1980
MS112 engine 5M-E to number 5M-3429547 1977-1983
MX73 engine 5M-E to number 5M-3429547 1983 on
Crown MS65 engine 4M 1971-1976
MS83, MS85, MS111 engine 4M, MS112 engine 5M-E to number 5M-3429547 1977-1983
MS123 engine 5M-E to number 5M-3429547 1983 on
Tercel AL25 engine 3T-C 1983 on
Supra MA61 engine 5M-E 1983 on
Hiace YH50/60/70 engine 2Y-C,3Y-C 1982 on
Liteace KM20 engine 4K, 4K-C 1979 on
Liteace YM21 engine 2Y-C 1979 on
Liteace KM36 engine 5K-C 1985
Coaster Bus RB11 engine 20R 1977-1982
RB20 engine 22R 1982 on
Hilux YN57/60/65 engine 3Y, 3Y-C, 4Y, 4Y-C 1982 on
YN55 engine 1Y-C, 2Y-C 1982 on
Tarago YR20 engine 2Y-C 1982-1984
YR21 engine 3Y-C 1984 on
Land Cruiser FJ62/70/73/75 engine 3F 1980 on
RJ70 engine 22R-C 1984 on
FJ40/45/55 1979 on
Dyna YU60 engine 3Y 1984 on
*edit* Image & Table...plus some more info *edit*
[Updated on: Fri, 01 August 2003 04:21]
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Location:
Brisbane
Registered:
May 2002
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Re: 18rg clarifications, solexes & fuel
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Sat, 02 August 2003 01:56
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The 18R-G is an import engine so it's no surprise it's not in that list. You will find that all 18R-G's have hardened valve seats and thus do not require leaded fuel or other snake-oil additives.
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Location:
Lost in the K hole
Registered:
May 2002
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Location:
Sydney
Registered:
January 2003
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Re: 18rg clarifications, solexes & fuel
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Sat, 02 August 2003 07:12
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There you go, smart people answered it for you 
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Location:
Hobart
Registered:
June 2002
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Re: 18rg clarifications, solexes & fuel
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Sat, 02 August 2003 07:22
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ok they all have hardened valve seats.... that is good news.
problem is i live in tassie and we dont get any good fuel, apparently (word of mouth) all tassie fuel comes from one shipment. Eg pulp from shell is identical to that of bp, caltex... etc etc.... and since shell don't do any of thier own supplies, shell optimax (and others) aren't here.
so i guess, the answer is PULP + octane boost.
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Location:
Adelaide
Registered:
June 2003
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Re: 18rg clarifications, solexes & fuel
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Mon, 04 August 2003 01:55
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Premium unleaded is generally around the 98 RON mark no matter where it comes from. If you use premium you shouldn't have any trouble or need for octane booster.
My brother is running about a 9.8:1 CR in his 18rg and has shorter duration cams than the original (later model engine with early model pistons) and has had not trouble with pinging or detonation on straight PULP.
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Location:
Adelaide
Registered:
June 2003
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Re: 18rg clarifications, solexes & fuel
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Mon, 04 August 2003 01:58
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All 18rg's came out of the factory with 40-phh-4 solex carbies.
these are 40mm ones.
The jets sound framiliar but I would be interested to know if you have the externally adjustable float bowl.
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Location:
Brisbane
Registered:
May 2002
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Re: 18rg clarifications, solexes & fuel
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Mon, 04 August 2003 02:47
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| Steve M wrote on Mon, 04 August 2003 11:55 |
Premium unleaded is generally around the 98 RON mark no matter where it comes from.
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PULP is required by law to be 95 RON; only some brands are higher than this. Shell Optimax and BP Ultimate 98 are the most common (in my area at least), but it's worth remembering that not ALL BP/Shell servo's carry the 98 RON stuff (ie many smaller ones still have 95 RON PULP).
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Location:
Hobart
Registered:
June 2002
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Re: 18rg clarifications, solexes & fuel
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Mon, 04 August 2003 06:48
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| Steve M wrote on Mon, 04 August 2003 11:58 |
All 18rg's came out of the factory with 40-phh-4 solex carbies.
these are 40mm ones.
The jets sound framiliar but I would be interested to know if you have the externally adjustable float bowl.
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yep i have externally the adjustable float bowl. So, all 18rg's came out with 40mm carbies. How do the 18rgu ones differ?, different jets? or are they the same.
Do ppl jet the carbies up at all?, this 'mechanic' i talked too said i should jet them up (he didn't say what size) to get more torque down low?... although i've lost confidence in him now, sine he was telling me early 18rg's came out with larger carbies. not the 'baby' ones in his words.
as far as fuel is concerned. I have recently learned that there is some high octane fuel coming to tassie, its just not sold at the servo. The local Performance Automobiles guys & customers get access to it. Im thinking someone must know a way of getting this.
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Location:
Adelaide
Registered:
June 2003
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Re: 18rg clarifications, solexes & fuel
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Tue, 05 August 2003 02:15
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have you got a wing nut on the top of your carbies?
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Location:
Hobart
Registered:
June 2002
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Re: 18rg clarifications, solexes & fuel
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Tue, 05 August 2003 04:12
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nope, no wing nut on mine
Chris
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Location:
Adelaide
Registered:
June 2003
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Re: 18rg clarifications, solexes & fuel
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Tue, 05 August 2003 12:42
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is there one bolt holding on your top plate or are there four of them?
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Location:
Hobart
Registered:
June 2002
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Re: 18rg clarifications, solexes & fuel
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Thu, 07 August 2003 04:24
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you mean the little plate covering the jets?... if so, one screw. if you mean the large cover over the carbie there would be 4-5 screws i think.
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