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Toymods » Tech & Conversions » 18rg in a Rx30, a few questions

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tomjon
Newcomer


Location:
Christchurch NZ
Registered:
September 2005
18rg in a Rx30, a few questions Wed, 14 September 2005 14:36 Go to next message
Hi, well I'm very much a newbie to all of this but I'm learning fast. I've got a mint 1979 Rx30 Cressida which I'm planning on putting a 18rg in, now I've spent days going through google etc & a coupla hours over previous postings of which there are a lot, so hopefully I won't ask too many basic questions, anyway: I've currently got a full 18rgeu with efi gear etc (done less than 100,000kms, imported frm Japan out of the car, bought for $270nzd frm local engine shop) & also I picked up a 82' Celica Camry (Jap import not sure if you got them in Aussie) with a mostly complete 18rgeu, & a w55 box, so from that I can get all the ecu & loom etc, if i need it). Is it going to be cheaper to put on twin carbs as form what i can tell efi is a real mission to put in + I like twin sidies. I've jst found a carby engine for sale now which I'm thinking of getting as it would make the whole thing easier cos i wouldnt have to worry bout fuel pumps etc +plus it comes with the twin solex carbs jetted etc for the engine. So basically 3 things: Am I beter off getting & using the older 18rg or putting the $$$ to the other 1, (are there any problems fitting carbs to a 18rgeu). Also Is it worth trying to put in the w55 box, my car has a w50 standard, & will the coil etc frm the 18r work for the 18rg. Also are there any other major things I need to sort out (apart from the exhaust & throtle setups) ie brakes or hoses etc. Sorry for such a big list Embarassed
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earlyrolla
Regular


Location:
Perth
Registered:
May 2003
Re: 18rg in a Rx30, a few questions Wed, 14 September 2005 15:08 Go to previous message
EFI = better driveability and better economy (depending how you drive of course!)

Side draughts = Sweet noise Very Happy and simple to fit

In my opinion if driven everyday I would go EFI, if only a weekender then either way.

Carbs onto 18RGEU - no problems that I know of...

Depending on the series of the older engine it will have a higher compression ratio and better cam profiles compared to the 18RGEU, hence more power potential.

The W55 box should fit easily size wise, not sure about the rear mount lining up though. Someone else might be able to answer this. At a guess I don't think it would be that far different to the W50. Just becareful to get the same shifter position on the box.

The coil from the 18R will work on the 18RG points distributor. If you have electronic ignition then you will need a different coil for the ignition system. The 18RG and 18R distributors have different advance curves so if possible stick with the 18RG distributor.

[Updated on: Wed, 14 September 2005 15:14]

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