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Location:
Adelaide
Registered:
September 2003
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 18RG Conversion - any Problems?
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Wed, 29 October 2003 11:19
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I am about to fit an 18RG into my RA28 Celica. I will probably get the engine from Adelaide Jap, but before i fork out how hard is the conversion. What i know so far is
- I need to fiddle with the throttle linkages
- I need longer Dizzy Leads
- New Top Radiator Hose
What i want to know is
- Would my 18RC extractors fit the 18RG (I guess not)
- Would an 18RG out of, lets say a RA40 be just as easy to bolt into current mechanicals
- Are there any other problems associated with the conversion that people have come across
- Does anyone know a good Twin Carby Dyno Tune joint in Adealide
p.s. are Adelaide Jap any good, the engine has a warrantee but no known mileage (could be dodgy)
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Location:
Brisbane
Registered:
July 2002
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Re: 18RG Conversion - any Problems?
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Wed, 29 October 2003 11:46
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Negative to the extractors, the head is completely different.
Generally the motors come complete with the exhaust manifold, which should be a piece of piss to connect to your current system and you can worry about extractors later.
It will bolt straight up to your current gearbox and use the same mounts as the 18RC though.
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Location:
Adelaide and Queenstown T...
Registered:
September 2002
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Location:
Madrid - Spain
Registered:
August 2002
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Re: 18RG Conversion - any Problems?
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Fri, 31 October 2003 02:45
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You will probably need an electric fuel pump because some of them don't have a cam to operate the mechanical one. Just go to the wreckers and pick one up off an old mazda or something, shouldn't cost more then $20.
The accelerator linkeages are better if you run the cable to a new pedal that was originally designed for cable operation. This is a good opportunity to grab all thoes bell cranks and push rods and throw them as far as you can. Trust me, you won't look back.
The blocks are pretty much the same, so they will fall into place there. Your biggest problem is getting the exhaust on and the linkeages sorted out. You should be able to knock it over in a weekend.
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Location:
Adelaide
Registered:
September 2003
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Re: 18RG Conversion - any Problems?
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Fri, 31 October 2003 08:35
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Cheers dudes,
sounds like a pretty chill conversion, but i guess something will pop up and pose a head f#@k.
i hope it has a little more boot than the 18RC though
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Location:
Brisbane
Registered:
October 2002
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Re: 18RG Conversion - any Problems?
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Fri, 31 October 2003 12:24
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uh, yeah, a little more boot is a under-statement, just get a 2.25 exhaust, it made a HUUUUUUGE difference to my power.
1 diff down, 10,000 to go 
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Location:
adelaide
Registered:
May 2002
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Re: 18RG Conversion - any Problems?
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Fri, 31 October 2003 13:52
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problems?..
the list is longer than my arm with my car, only little things, but in the last two weeks it has payed off to be driving the car again, so many little mods done which the car needed.
I finally got my exhaust welded and finished up today, stayed with the 2" system after the pacemakers, put my 2 resi's in series and went under-the-diff to a new straight thru muffler at the end... it sounds heaps nicer than it did, and going under the diff made a fair bit of a gain! i couldnt believe it!
Now i think about it i could have gone a bigger sytem, and it may have given it a bit more roar, but it has so much low-down power and torque now that its not funny. i can pull away from most cars in 3rd 4th or 5th with only a touch of the pedal.. and it has a nice note, not to loud but the rumble of DOHC is there..
i guess what im saying..
the conversion is worth the hassles..
________________________
blackRA28
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Location:
Canberra
Registered:
December 2002
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Re: 18RG Conversion - any Problems?
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Fri, 31 October 2003 22:00
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Doing mine at the moment and its getting to the point where its more hassel than its worth from other peoples stuff ups
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 02:05
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soltuion - don't let other people play 
from my experience - its a really esy conversion! REEALLY easy.
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Location:
Brisbane
Registered:
May 2002
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 03:22
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From my experience, it's so easy I'd hesitate to even call it a conversion.
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Location:
Brisbane
Registered:
February 2003
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 03:40
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| Norbie wrote on Sat, 01 November 2003 13:22 |
From my experience, it's so easy I'd hesitate to even call it a conversion.
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yup! the 18RG would be an enhancement !
FWIW, my g/friends father (farmer from NSW New England area) stuffed an 18RG into a mazda 626 that got very intimate with a tree. Biggest problems he had were fabricating mounts for the engine (to suit mazda cross member), air-con compressor and exhaust system (modded to suit the madza underbelly). linkages for throttle/clutch were only minor issues. And the mazda e/bay is smaller than RA23/28/40.
toyota-to-toyota e/swap will be a walk in the park..
It took years of abuse for a top-end rattle to appear and it was still effortlessly driving around the New England ranges with 2 adults+rottie when sold at clearing sale.
charles.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 04:24
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more of a "tune-up" really! 
hardest big i had was putting in the new clutch master cyinder (cos i felt like it) followed by putting on the exhaust myself (from my old ra28).
Next exhaust will be underdiff for sure!
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Location:
Perth, Western Australia
Registered:
June 2003
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 04:37
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Hey
i just previously finiashed an 18r-g conversion into my ra40
the main problem i had was the linkages...
thats all that stopped me really. I ended up takin to the originals with a hacksaw, tappet set and other bits and pieces and created ones that matched the factory 18r-g linkages.
So yeh, thats basicly it.
I have pics here somewhere, if u want them email me
steve101@westnet.com.au
CHECCK THE CLUTCH AND THRUST BEARING before u drop the engine in..i made that mistake and the next day i spent under the car dropping the gearbox and replacing the bitch.
F*** that.....   
Heres some pics of whhat my conversion turned out like
****THIS ENGINE IS FOR SALE*****
This is after the conversion:
cya guys!
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Location:
Brisbane
Registered:
October 2002
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 05:25
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i went for the 2.25 cause i only had a 1.0 inch exahust
well,,,,,maybe a 1.1
i heard one with a 2.25 and a 2.0 and i liked the sound out of the 2.25 better, i get heaps of looks, like today at a set of light a rolla pulled up and the pass. hung out the window, whatcha got in that mate
linkages was the worst, it cant be a too bad-of-a convo if the biggest hassle is linkages
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RG Conversion - any Problems?
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Sat, 01 November 2003 11:04
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linkages?!?!??! EWWWW!!!
Cables dude!! Cable accelerator!! Links are gay 
Phil - what exhaust manifold are you using?
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Location:
Brisbane
Registered:
May 2002
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Re: 18RG Conversion - any Problems?
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Sun, 02 November 2003 01:30
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Yep, cable is they way to go. I have the part number of a cable which is almost a direct fit for an 18R-GEU (minor mods to the pedal required).
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Location:
Brisbane
Registered:
October 2002
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Location:
adelaide
Registered:
May 2002
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Re: 18RG Conversion - any Problems?
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Sun, 02 November 2003 11:27
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I just got my exhaust finished off last friday, went under the diff and it made a significant improvement i think!! in sound and flow definately, because the old bends were terrible!!
Its only a 2" system off pacemakers, into two resinators and under the axle into a straight through muffler.. I wanted to go 2&1/4" but the extractors only come out at as 2" and i already had two almost brand new 2" resinators sitting around..
BUT it sounds great now and has heaps more pull in all gears down low as well as up high, not too loud but it is when i open up that thottle , which by the way is controlled by CABLE and has a great feel to it. quite firm pedal but smooth to push down. I have never loved DOHC sound so much before now ...
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Location:
Adelaide
Registered:
August 2003
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Re: 18RG Conversion - any Problems?
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Sun, 02 November 2003 13:02
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Is there much difference in going under the diff to over it? What are the advantages? The only think I don't like is when you see those exhaust systems hanging about 2" under the car, virtually scraping the road. Are the under diff systems like this, or more discreet?
Cheers,
Tim
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Location:
adelaide
Registered:
May 2002
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Re: 18RG Conversion - any Problems?
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Mon, 03 November 2003 09:10
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Nah they are heaps discreet if done well, mine is tucked up below the rear sway bar, a bit of clearance so it doesnt hit but the 2" pipe doesnt hang down too low.. Havent bottomed it out yet and my driveway has a heaps savage dip also! hehe
I dont know about the advantages, all i know is that the new mufflers and piping opened the engine up a little bit and gave it heaps more breath.. and it already had a shitty 2" system.
i shoulda gone the 2 and a quarter but im trying not to get defected for now so i guess it can wait for another day..
Id post you up a photo of my system from behind but i cant host the pics up...
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