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Registered:
May 2002
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 18R-C Hot Up???
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Sun, 26 May 2002 23:52
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OK, just to consider my options what do you all think of this as a plan?? Im thinking of a rebuild on my 18R-C, new pistons, rings and bearings. I want to get some help with the following ideas;
A new carby (maybe dual throat from XF falcon?)
Extractors
Advance the timing?
Run unleaded (can i do this using upper head lube in my fuel?)
I dont want to spend much, and i dont expect a rocket, but a bit better than stock would be nice. Any help you guys can recomend would be appreciated,
cheers,
chris.
(this is to get me through about a year untill i can afford a 1G-GTE or somthing)
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Location:
Melbourne
Registered:
May 2002
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Re: 18R-C Hot Up???
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Mon, 27 May 2002 01:35
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A new carby (maybe dual throat from XF falcon?)
twin SU's would be a better idea get a couple off an old Rover V8
and then get a couple of V manifolds made
Extractors
sounds good
Advance the timing?
you need to retard it as unleaded its a lower octain then LRP
Run unleaded (can i do this using upper head lube in my fuel?)
18R-c has hard valve seats from the factory
no need for that flashlube crap
Allan
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Location:
Canberra
Registered:
May 2002
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Re: 18R-C Hot Up???
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Mon, 27 May 2002 02:43
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I f you want more poke I have a pair of factory down draught manifolds to suit an 18R-C.
Phil
(Celica2
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Registered:
May 2002
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Re: 18R-C Hot Up???
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Mon, 27 May 2002 23:05
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what sort of carbies will bolt up to the manifolds? I would be very keen to get hold of the manifold/s (do you need one or two?)How much do you want for them and where abouts are you?
Thanx heaps,
chris.
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Location:
Canberra
Registered:
May 2002
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Re: 18R-C Hot Up???
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Mon, 27 May 2002 23:10
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The standard twin barrel carbies will bolt straight onto them or you can use adaptor plates to run something like holleys. You will need 2 of them aas they are individual units. I would like $100 for them (neg) and I am in Canberra.
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Registered:
May 2002
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Re: 18R-C Hot Up???
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Mon, 27 May 2002 23:38
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ok, cool. 100 dollars seems good for me. So if i rip another carbie off an 18R-C at the wreckers i can bolt them both up to the manifolds? that sounds cool then. Would i need to come and pick them up or can they be sent to me? thanx man,
cheers,
chris
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Location:
Canberra
Registered:
May 2002
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Re: 18R-C Hot Up???
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Tue, 28 May 2002 02:51
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Give me a call after 8.30pm tonight on 0412 699 144.
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Registered:
May 2002
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Re: 18R-C Hot Up???
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Tue, 28 May 2002 15:10
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OK...WARNING.!!!!!!!!!....hold it there.
I have been there, done that, with poor increases in power.
I would say get an 18rg twin cam transplant and start from there, but if you insist......
The major restriction here is in the breathing of the engine. I rebuilt my engine with higher compression, a warm waggot cam, and a jetted carby. Fuel consumption was up 50% with small power increases...bad news. The cam I had in there was also not freindly and I could not get the car to stop back firing. i then pegged that cam, put back in the old one and it actually had more power.
Bang for bucks......this is what i would do. Leave the standard cam until the last mod.
1. get a set of good extractors as the existing manifolds are junk!, put through a good 2.5" exhaust. (biggest gain)
2. If you are creative, I've always found quad carbs to run well, and I made some for a civic using 2 sets of 750cc motorbike carbs....worked very well. Otherwise, a custom intake manifold (other major restriction) with a weber or similar. Go for something simple and easy to tune, bugger off the auto choke if you have one for a manual.
3. Prior to a new cam, port the buggery out of the head....and lastly get a warm/hot item knowing that your fuel bill will go up significantly.......
This will cost you in the order of $1000-$1500, so think about it carefully, you could spend that on a newer celica for that.
Be aware that you will still not get much of a power increase as this engine is not balanced especially well, and you will only see power gains in the high revs. I have a supra twin turbo now, so sometimes it is better to wait to work on a high tech engine.
Otherwise...have fun!
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Club President
I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: 18R-C Hot Up???
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Wed, 29 May 2002 11:55
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Chris,
You know there is a reason that nobody does this anymore !! Its not really worth the money. Still if its what you want go for it !
I have had the pleasure of driving a VERY warm 18R-C. We are talking side draft 45mm weber extractors Custom head work including oversize Valves (Holden Red motor from memory) Oversize Pistons at 10.5:1 Compression Blue Printed and Balanced bottom end. Lightened flywheel and a pretty lumpy cam. It was a dead set pick at low RPM but god damn it Hauled !!
For the money tho. A 1GG series conversion or an 18RG would be my personal choice.
BTW Twin Carbs are a PITA to Balance and keep in tune. If you really wanna do this personally I would recomend fitting a Single side draft carby. Linx make a manifold for this and they are still in business. Try looking for "Redline Performance" they are near the City around Parramatta road somewhere. New manifold will prolly cost you around $150 Bucks !
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