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Location:
Nor Calif USA
Registered:
June 2002
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turbo 18RG
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Thu, 24 April 2003 06:20
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Hi All,
on your turbo 18RG
How much Boost can you run until you have
to cut O-ring in your block?
My turbo project is getting close to the end. I know
I need to O-ring the block to run big numbers of boost
And I'm wondering How much boost could you run before you
had to O-ring your block.
I'm hoping to run big numbers of boost of 14 to 16 psi before I O-
ring my block.
This is a long term project for me.
I have 1 block built all ready and I have another
in the planning stages.
That is why I'm asking this question.
If you can help that would be great.
If not have a great day and keep the rubber on the
on the road.
http://photos.yahoo.com/toyceli72
here is some of the pics I have.
Some need to be updated.
I know some you have seen this all ready.
so please bear with me.
Karey
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Location:
Brisbane
Registered:
July 2002
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Re: turbo 18RG
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Thu, 24 April 2003 06:40
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I assume you want to get the block o-ringed later so you can run a metal gasket.
I'm running 16psi on my 18rg, but i've got a 2mm copper gasket and i've had the block o-ringed.
I think i would only run around 8-10psi max if i was using the standard gasket though. It all depends on what has been done to the engine and how much compression your running but i think 14-16psi would be pushing it.
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Location:
Nor Calif USA
Registered:
June 2002
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Re: turbo 18RG
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Thu, 24 April 2003 06:57
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Hi
My compression is going to be near 9.0
with the 20R piston.
I will be using ARP studs.
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Location:
brisbane
Registered:
March 2003
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Re: turbo 18RG
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Thu, 24 April 2003 11:49
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you can run up to 10 psi safely if you got your twin webbers still on but if you bring the compression to high 7's you could run 15-18 safely 9 to 1 you wouldnt run anymore then 9 psi without forged pistons
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Location:
Brisbane
Registered:
July 2002
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Re: turbo 18RG
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Thu, 24 April 2003 23:31
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I'd have to agree with that, considering your setup.
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Location:
Nor Calif USA
Registered:
June 2002
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Re: turbo 18RG
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Fri, 25 April 2003 00:16
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you can run up to 10 psi safely if you got your twin webbers still on but if you bring the compression to high 7's you could run 15-18 safely 9 to 1 you wouldnt run anymore then 9 psi without forged pistons
This engine has forged 20R pistons and it will
have APR head studs.
so I hoping to get 14 to 16psi
now and my next engine it will be 20 to 25
with a O-ring block.
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Location:
adelaide
Registered:
May 2002
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Re: turbo 18RG
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Sun, 27 April 2003 09:10
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How about a standard rebuild 18rgeu? can these handle any amount of boost safely without risks? if you replaced the injectors with 3tgte items or something.. ?
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Location:
brisbane
Registered:
March 2003
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Re: turbo 18RG
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Sun, 27 April 2003 11:55
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as long as the bores are round and the pistons still fit int he bores flush you shouldnt have any problems blackra28 but you would only be able to run veyr low boost.. like no more then 8 psi being a 9:2:1 compression engine with alloy pistons you can run more boost if you bring the compression down.
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Location:
MACKAY
Registered:
May 2002
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Re: turbo 18RG
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Sun, 27 April 2003 12:21
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I built a standard 18RG a few years ago for a mate and then decided to fuel inject it and run Haltech E6S and stick on a turbo ,Was running on 15 psi for quite a while and there was no signs of any trouble until we decided to turn up the boost to 24psi and then it broke the ring lands , when I pulled it down there was no sign of any leakage in the head gasket.
Trevor
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: turbo 18RG
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Sun, 27 April 2003 12:35
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TurboRG, Just wondering what your custom Inlet manifold is made from?
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Location:
brisbane
Registered:
March 2003
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Re: turbo 18RG
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Mon, 28 April 2003 12:20
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thats because it has had a rebuild and the heltech was running the engine properly.. any engine lasts longer is it has been tuned right 
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Location:
Nor Calif USA
Registered:
June 2002
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Re: turbo 18RG
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Tue, 29 April 2003 00:03
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Aluminum pipes.
This manifold I haven't finished and
I don't think I ever will. Now that I have
2 stock EFI manifolds.
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Location:
Argentina
Registered:
August 2003
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Re: turbo 18RG
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Fri, 07 October 2005 04:39
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| TurboRG wrote on Thu, 24 April 2003 03:20 |
How much Boost can you run until you have
to cut O-ring in your block?
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Can anybody elaborate on this "o-ring" thing? what kind of o-rings are used for this? metal? what kind? Are there pics of this?
Also, are there news on this project?
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Location:
Brisbane
Registered:
May 2002
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Re: turbo 18RG
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Fri, 07 October 2005 05:15
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Um, are you aware this thread is over two and a half years old?
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Location:
Tassie
Registered:
October 2003
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Re: turbo 18RG
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Fri, 07 October 2005 07:25
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at least he searched
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Location:
Brisbane
Registered:
October 2002
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Re: turbo 18RG
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Fri, 07 October 2005 09:38
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true
o-ringing is where they machine a tiny groove about 1.5mm on top of the bore in the block, they fit a little metal o-ring, it just makes for a better seal
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Location:
Argentina
Registered:
August 2003
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Re: turbo 18RG
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Fri, 07 October 2005 12:16
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I realized that and dont consider the date a problem. I am a moderator myself on another forum and there we encourage to do this (use old topics).
Thanks for the info on the o-rings. I was in the doubt, mainly, on the o-ring material. I know that on drag racing in the USA it is a common practice to use o-ring for cylinder head sealing (only o-ring, not gasket at all). Generally these o-ring are little metal tubes filled with Sodium, for example. They leak pressure at low temperatures, but in normal codition they seal just fine.
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Location:
Toowoomba
Registered:
May 2002
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Re: turbo 18RG
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Sat, 08 October 2005 04:23
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hey MR DOHC who is that chick and where do we get more photos from? 
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