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Location:
Gold Coast
Registered:
June 2002
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18RGEU to 18RGRTU???
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Mon, 04 November 2002 10:16
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How do these motors go when they are turbo'd?
i have a t03 here that i want to put to use and build up a engine on the side.
Any ideas helpful or links would be great
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Location:
Brisbane
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Mon, 04 November 2002 23:06
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18R-G's respond very well to forced induction, and the later-model 18R-GEU works especially well because it already has a turbo-friendly compression ratio. A T03 should work well; I have a series 5 RX7 turbo ready to go on mine and it's a similar size. I plan to install it as soon as my Supra is on the road (hopefully soon). 
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 05 November 2002 05:24
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from memory is it not true that the 18rgeu has 8.3 compression, and the 18rgu has 8.7:1??
if so, can i possibly slap ein turbo onto my 18rgu with the standard internals (low boost of course) considering that i already have twin 45mm webers? im guessing that the dizzy would need re-graphing and the webers re-jetted to suit the forced induction?
other than that would it be much more difficult than doing it to the 18rgeu? i do understand there would be problems with possible detonation with the carby version, but will it cost much more to do in comparison to the efi version?
i really need to know cos i WANT to do this BAD!!!
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Location:
Brisbane
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 05 November 2002 06:27
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Yeah it will be much harder to get a carby turbo running properly, which means it will end up costing you more. The results will never be as good either - the extra flexibility offered by EFI makes all the difference when you add forced induction to the equation. My advice: keep your eyes out for factory EFI hardware and go from there...
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Location:
Ipswich QLD
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 05 November 2002 07:02
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| Norbie wrote on Tue, 05 November 2002 17:27 |
Yeah it will be much harder to get a carby turbo running properly, which means it will end up costing you more. The results will never be as good either - the extra flexibility offered by EFI makes all the difference when you add forced induction to the equation. My advice: keep your eyes out for factory EFI hardware and go from there...
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I second that advice and also advise to plan to change the diff and box and brakes and radiator and injectors(on EU) and the list goes on....
Thanks
Ben
*NOTE*: small turbo applications will not need all the above suggestions implemented, but i do recommend upgrading the brakes and do a good head port and polish
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 05 November 2002 12:20
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damn... looks like i will have to search for some EFI gear...
i've never evan thought of what u need to turn the carby into efi... jus the intake manifold, ECU, loom, fuel rail, fuel pump+surge, .... what else? sensors?
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Location:
Brisbane
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 05 November 2002 13:32
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You will also need an airflow meter and a themostat housing from a GEU engine (it's a different shape to clear the plenum).
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RGEU to 18RGRTU???
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Wed, 06 November 2002 22:45
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well it looks like i will get me some of those bits.... now i wonder if Juzzo84 still has that 18rgeu hanging around??
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Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Thu, 07 November 2002 00:41
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If you are going to turbo a carby, make it a suck through rather than a blow through.
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Location:
Brisbane
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Thu, 07 November 2002 06:08
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Why? So it can have less boost and run like crap at anything less than WOT?
Blow-through is definitely the preferred option, it's just a little harder to set it up. Note that suck-through systems can't use an intercooler, and that alone is a good enough reason to give suck-through a miss.
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Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Thu, 07 November 2002 07:28
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..and suck-thru apparently take longer to start, but i was under the impression blow-thru setups eventually kill engines because of mixture problems!?!?
i take it you can't blow-thru the stock twin solexs (or webbers), even with a higher fuel pressure and plenum chamber?
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Location:
Brisbane
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Thu, 07 November 2002 09:13
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Both suck-through and blow-through can kill engines if the mixtures aren't setup right, and this is hard to do because carbies aren't well suited to large pressure variations. Obviously on a turbo car you've got constant pressure variation, so the best you can do with a carby is make it rich as hell and hope for the best...
You can use the sidedraughts for a blow-through setup, in fact HKS used to have a kit for this very purpose. Here's a pic of one of these kits installed in an RA28:
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18RGEU to 18RGRTU???
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Thu, 07 November 2002 10:33
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i like bolt on.... im going to email toysport in the USA about this...
well i think for now i might hit the EFI... and find a turbo
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Location:
Brisbane
Registered:
October 2002
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Re: 18RGEU to 18RGRTU???
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Thu, 07 November 2002 11:28
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u can't have a blow off valve on a draw thru either.
At willowbank last night there was a MK1 escort with a 2lt blow thru, ran 11.8's at 125mph
no BOV or inter cooler
BTW who's celica was that there last night
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Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Fri, 08 November 2002 13:35
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Seen the hks blow through before.
Imagine fitting that blow through kit on a set of 20 year old solexs - they stay tuned NA for about 5 mins at best.
No you can't use an intercooler.
Norbie, no disrepect mate, when you say a little harder to set up, it might be a bit more difficult than that?
I was suggesting suck through for the sake of simpliciy or ease of setup. Cause blowthrough can be real difficult to setup.
Maybe not for you.
And no, if they were both perfect suck through wouldn't be as powerful.
But EFI would kill either.
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Location:
Hornsby, N.S.W
Registered:
September 2002
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 Re: 18RGEU to 18RGRTU???
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Fri, 08 November 2002 21:48
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i heard of a guy that was running a turbo 18rg-eu it was pulling 150kw @ the treads.
JUZZO
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Location:
Brisbane
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Sat, 09 November 2002 06:06
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| jase wrote on Fri, 08 November 2002 23:35 |
Imagine fitting that blow through kit on a set of 20 year old solexs - they stay tuned NA for about 5 mins at best.
No you can't use an intercooler.
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Are you talking about suck-through or blow-through? You can use a cooler on a blow-through setup; in fact the car in the pic above has a water-to-air setup on top of the engine.
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Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Sat, 09 November 2002 07:43
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I was agreeing with you on the fact you can't use an intercooler on a suck through.
Is that ok sir?
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Location:
A.C.T
Registered:
July 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 17 December 2002 01:24
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Here, i'll help you decide to put a turbo on your 18RG. I have a turbo manifold for and 18RG right here for you to buy right now!!! u name a price. only thing is the way it's designed you'd have to do a suck through job i'd assume. or just get it injected 
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Location:
adelaide
Registered:
May 2002
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Re: 18RGEU to 18RGRTU???
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Tue, 17 December 2002 06:13
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ToyRota.. Just out of interest mate, how much would you be asking for that turbo manifold and what turbo housing does it suit? I have an injected 18Rgeu waiting to be put to use. Pity i just bought new pacemakers for the motor or i could of considered it.. damn, hehe.
Peace
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