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Location:
Sydney
Registered:
August 2004
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 12R, turbo or upgrades?
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Fri, 20 August 2004 03:13
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hey all I need some ideas for getting more power out of the tough little 1600 toyota 12R engine
I have one in my corona and I wouldn't mind a few more killawatts to play with cheers.
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Location:
Melbourne
Registered:
August 2003
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 03:20
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18R-G.
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 03:24
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G being the japanese 18r ? how much power and how bothersome to install?
the 12r is a 67kW 1600
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Location:
Melbourne
Registered:
August 2003
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 03:34
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18R-G is:
DOHC w/ bucket and shim valve train
Dual Solex sidedraft carburettors
1968CC
~140HP in original form
It's available in Australia second hand from time to time.
Shouldn't be hard to adapt to your car. Perhaps the R motor's engine mounts/sump may interchange to give you a workable combination. What transmission are you currently running?
As a point of interest, is your 12R a 5 main bearing or 3 main bearing engine?
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 04:00
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she is a 3 main bearing engine strapped to a bullet proof 4 speed manuel
the gearbox case is made of Iron if that helps identify the box?
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 04:26
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If you have an RT81, the box is a W40 (4 speed variant of the Celica steel case 5 speed).
I really wouldn't bother working the little 12R. I know someone who slotted a Rover V8 in one.
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Location:
Melbourne
Registered:
August 2003
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 04:33
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The W40 should bolt to the 18R-G.. I think.
It's bolt-in for W50 transmissions, but I seem to remember old W40's having some strange non-standard or non-interchangable characteristics compared with W5# boxes..?
That may have been for extension housings though..?
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 04:39
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Yes correct she is an RT81
does anyone know wether (just for kicks ) the 12R is built stronge enought to take a turbo even if it is a small one
remembering this is a cast iron head truck engine
PS I have 2 spare 12Rs in full running order
and a 13t-u that I'm not sure if it will even kick over.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 04:51
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The bellhousing for the 12R to W40 will be different to the 18R to W40 bellhousing. The 3 main bearing R motors have a different tail on the motor - almost like a cowl around the flywheel that is an extension of the block.
As a side note, the W55-9 bellhousings will not bolt up to the W40 or W50 boxes.
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Location:
Melbourne
Registered:
August 2003
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 04:58
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Okay, so a new motor will require a transmission change.
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 05:43
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I don't realy whant to bother with changing all of the drive train so just stick to suping up the engine for now
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 06:51
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Hmmm gotta keep replyin to keep the thread at the top
what ever happened to shaving the head ????? it was all the rage when my car was made
would shaving the head enough to bring original compression back cause so much blow back into the crank that it wouldn't be woth doing???
and keep the idea's commiong about turboing the old girl.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Location:
Tamworth
Registered:
June 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 11:45
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hey man,
get a 4M should fit nicely and go like the clappers.
cheers
brad
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 12:43
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OK I'm well aware that dropping a racing engine or a just plain bigger donk would make my corona faster what I'm more interested in is the novelty of getting more power out of the 12R I need every ones thoughts on things like either putting a head spacer in and adding a turbo and an SU carby orrrrr shaving the head and extracting her
ya know things like that
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 12:45
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come to think of it hey Brad and others who know about the 7R
I wonder if it would be worth it buying Joshes 7R and boring it out and extracting it
how much power would that end up ??????
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Location:
Melbourne
Registered:
August 2003
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 13:42
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| toyotacrown76 wrote on Fri, 20 August 2004 21:45 |
hey man,
get a 4M should fit nicely and go like the clappers.
cheers
brad
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You've got to be joking. Seen an RT81? Pass the gas axe...
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Location:
Brisbane
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 14:41
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| 12R4banger wrote on Fri, 20 August 2004 22:45 |
how much power would that end up ??????
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Let me gaze into my crystal ball.
Wait a minute! I'm getting something...
"Fuck all."
Hope that helps. 
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 21:27
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| 12R4banger wrote on Fri, 20 August 2004 22:45 |
how much power would that end up ??????
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I believe I gave you my opinion a little earlier.
| gianttomato wrote on Fri, 20 August 2004 14:26 |
I really wouldn't bother working the little 12R.
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Location:
Tamworth
Registered:
June 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 22:41
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oi adrian, josh is still selling it. also why dont you get the 13T-U and stick that in the corona?
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You've got to be joking. Seen an RT81? Pass the gas axe...
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those coronas look awesome whats your problem are you blind?
brad
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 22:58
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well ok lets talk about the 13T-U this is a very torquey 1.8 OHC 4cyl wich is rumoured to be one of the free'st revving engines for it's time (it's suposed to have a twin chamber head) inventing a 13T-UGTE sounds kinda cool
by the way I LOVE Torque!! nothing makes me smile like low revs wet weather wheelspin in 3rd gear around corners and roundabouts
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Fri, 20 August 2004 23:31
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bump
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Location:
Brisbane
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 00:06
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| toyotacrown76 wrote on Sat, 21 August 2004 08:41 |
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You've got to be joking. Seen an RT81? Pass the gas axe...
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those coronas look awesome whats your problem are you blind?
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He was responding to your suggestion of a 4M in an RT81. If anyone's blind it must be you if you think that great lump is going to fit. 
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 00:07
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| 12R4banger wrote on Sat, 21 August 2004 08:58 |
...inventing a 13T-UGTE...
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Ever heard of a 3TGTE? Better idea, less hassle.
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 01:10
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ok so no one on here has any clue about tuning you all just pay thousands and put huge donks in your cars.....????
my car weights 950kgs I just whant some tips for cheap ways to get my cars power near or over it's original power level
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Location:
Gold Coast
Registered:
October 2002
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 01:40
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| 12R4banger wrote on Sat, 21 August 2004 11:10 |
ok so no one on here has any clue about tuning you all just pay thousands and put huge donks in your cars.....????
my car weights 950kgs I just whant some tips for cheap ways to get my cars power near or over it's original power level
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 01:50
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No. None of us have any idea.
Turbocharge your 12R. Inform us of the total cost and nett power improvement. We eagerly await your no doubt outstanding results.
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Location:
Sydney
Registered:
August 2004
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 01:57
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yeah ok I'm not writing anything else in this thread
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Location:
Gold Coast
Registered:
October 2002
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Re: 12R, turbo or upgrades?
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Sat, 21 August 2004 02:05
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have a hissy fit then.
but the cheapest easiest and best power gains are to be had from conversions not fixing up your current motor
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