For the love of a tractor engine: The life and times of the 18R-G

[JadeEstevez]

Hey just curious, Would boring my 18RG to 2.2litres cut into the revving characteristics much? Also I want to have pretty high compression, whats the highest and safest compression ratio you can go with the pistons in the 18RG (Some guy on Classic-Celica.com has 12:1 ratio pistons for sale!?). Sorry if this is the wrong place to ask, just looking for some info ready for my rebuild ;P

[JustenGT8]

A bore out to 2.2 won't make much difference and maybe even enhance how it revs (being oversquare).

12:1 will be pushing it for 98 but it will depend on cams, whether still carby or going EFI etc. Doable but not really recommended for a daily....unless your local servo has E85?

[JadeEstevez]

It's carby =) What about 11:1 then? Keeping in mind it will be my daily, just want it to have some balls! Also forgot to mention I will be getting cams to suit the bore.

Want it to go hard but still be used as a daily.

[JadeEstevez]

Double posted for some reason O__o

[JustenGT8]

11:1 will be happy enough on 98, specially with biggish cams.

It's not going to be a cheap exercise to build an n/a 18RG with 'balls'. For not much more $$$ you could go turbo and have a lot more balls

[JadeEstevez]

Well I have thought about turbo, But I think that's the next step...

See, I have rebuilt an 18R all on my own, extractors, weber blah blah blah... Next step is a twin cam, with twin carbs I think... Then EFI (Which I know nothing about), after I learn about EFI, I'll tackle Turbo.

But I figure I should make a sweet N/A 18RG with a little bit of work instead of just stock ;P Especially when I'm completely rebuilding, I'll have the chance to bore it and work on it a bit.

[JustenGT8]

Having done all that myself (by necessity not choice), i'd just shortcut to the good stuff

[JadeEstevez]

Should I really jump that gap?

I mean 18R............................................... ..Turbo charged 18RG. Way different ;P

As much as I'd love to, I don't know anything about EFI or Turbo's, I wouldn't know how to set any of it up O__o

[o_man_ra23]

There is a thread dedicated to whacking a turbo on the 18rg. Start there. I would suggest a ball bearing turbo in the gt25 or gt28 size range, depending how much powah you want, against how quick you want the turbo to spool.

[JadeEstevez]

Well I'll go hunt for it. Thanks peoples.

Time to learn about turbo's!

[Zammo]

Y U TURBO RG


they sound so much better N/A

[JadeEstevez]

Well I must admit, it does sound sick at the moment N/A and twin carbs =) But I do like the sound of a turbo.

[Willofan]

Try this Marcus

http://www.toymods.org.au/forums/tec...ce-manual.html

To start with, you need low compression pistons about 8.5:1 for optimum performace from a turbo unit.

Not my cup of tea personally, I prefer 11.1:1 89mm pistons naturally aspirated with 48mm DCOE webers and 304 cams. It happily produces close to 200hp and revs to 8,500 all day long. Racing set up of course, not for the street.

[JadeEstevez]

Sounds nice, How street friendly could you get with a setup like that?

Thanks for the link dude =)

[JustenGT8]

I had a daily with around 180hp n/a and it was fine for way back then

No way do you need 8.5:1. Modern fuels and modern ECU... even 10:1 is fine and dead easy to set up. I have an 11.5:1 setup build from scratch for turbo and not a bit of concern this will cause me dramas.

I find that most folk who don't like turbos haven't been in a decently set up car I agree the induction roar from quad carbs is spine tinglingly good, but i'd trade that any day for the rush of torque that pins you to your seat and nothing can deliver that like a turbo