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Location:
Hobart, TAS
Registered:
May 2002
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18rg power potential 145hp to ????
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Wed, 03 July 2002 13:33
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Im getting a 18rg, im not touching the bottom end, i was wondering how much hp/kw would be gained if i had the head ported, put better cams in and put 45mm webers on?
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I supported Toymods
Location:
Oyster bay NSW
Registered:
May 2002
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Registered:
July 2002
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Re: 18rg power potential 145hp to ????
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Thu, 04 July 2002 07:32
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Any of you ppl know how much and 18R-GEU would cost? or alternatively how much just the efi gear including everything but the head and block would be(I already have 3 efi heads for 18rg just none of the other gear)?
not surge tank etc, just the specific engine bits
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Location:
Mackay, Nth Queensland
Registered:
June 2002
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 Re: 18rg power potential 145hp to ????
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Fri, 05 July 2002 14:32
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I got my engine and gearbox from a guy in newcastle. It's an 18-RGEU model with twin 45mm Webbers siderafts. The engine was already done up with lightened fly wheel, high compression pistons, 65/20 cams, short-throw shifter, heavy duty clutch, 2 1/4" extractors etc. the lot was for $1500 (good deal) plus $200 freight to nth qld. 
at the moment the engine is in my st141 corona (after 3 months of conversions) modified ra40 cross member to suit the power steering and brackets for aircon and power steering motors.
heres a pic of the engine at the time of arrival 
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Location:
Ipswich QLD
Registered:
May 2002
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I'm running 12.0:1 compression!
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Sat, 06 July 2002 03:09
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My 18RGU is running an enormous amount of pressure!
What do u guys reckon my horsepower would be?
I've got:
balanced and reground crankshaft, balanced and lightened flywheel, major porting, shaved head(thats why comp. is so high), competition cams, 2.75inch straight through exhaust with only one muffler-supertrap, custom mandrel-bent extractors, custom airbox with pod-filter on twin solexs, and a holley red fuel pump.
I tried to get it dyno tuned, but the guy wouldn't do it cause it was running on-a problem when running so much compression.
I'm guessing about 150hp or above. The fastest I've got on the strip is 16.83@89mph with traction loss through till third(baldish tyres-no money). With new tyres i'd think i'd get into the high 15s easily.
PS- is there any quick fix to stop my car running on? I've tried remapping the distributor and lowering the revs, etc... and they don't work when the motor is hot. Any suggestions apart from dropping the compression?
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Location:
melbourne
Registered:
May 2002
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Re: I'm running 12.0:1 compression!
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Sat, 06 July 2002 03:51
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if you were running 12 to 1 it would ping its tits off and would not have much advance and would need to run AVGAS to drive it around town .if it is running on there should be a solenoid valve that runs from the airbox and 2 the rocker cover and attaches to the balance tube ,it shouild be put back there .if you have not got 1 ,lower the heat range of your spark plugs ,by memory your eng should have w-16 exu plugs try w-20 or 22 that should stop it running on
glenn
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Location:
Ipswich QLD
Registered:
May 2002
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Re: 18rg power potential 145hp to ????
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Sat, 06 July 2002 04:29
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It was compression tested at 200psi!
It is running that much i've had two tests and both say the same!
It doesn't ping much at all- only on occassions when its hot and i try planting the pedal in forth at about 2000rpm.
Apart from that its going great. No i dont have that link either. And i have changed my spark plugs to B6ES spark plugs on recommendations from a mechanic and a drag/race mechanic. I'm using the B6ES not the BP6ES. These plugs have pretty much stopped the pinging.
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Location:
melbourne
Registered:
May 2002
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Re: 18rg power potential 145hp to ????
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Sat, 06 July 2002 10:50
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just cause you have 200 psi does not mean you have 12 to 1 ,my comp is 240 psi but i have 10.8 to 1 comp and i have 300 duration cams and 440 lift
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Location:
Ipswich QLD
Registered:
May 2002
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Location:
Brisbane
Registered:
May 2002
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Re: 18rg power potential 145hp to ????
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Sun, 07 July 2002 01:33
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Here's a tip: don't believe anything you read in Hot4's, unless it pertains to gay bodykits or skanky models draped over bonnets. When it comes to technical knowledge, they're full of shite!
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Location:
Ipswich QLD
Registered:
May 2002
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Location:
melbourne
Registered:
May 2002
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Re: I have to agree with u there!
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Sun, 07 July 2002 01:52
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i need to no what cyl head it is ,efi or carby what size cams ,lift and duration what size carbys and what extractors and bore size of pipe ,your comp will be say 10.5 to 1 .when they used to race 18rgs at bathurst they had 10.5 to 1 310 duration and 445 lift cams 48mm webbers and 4 into 2 into 1 exhaust they made 175 hp then went to mechanical injection and dry sump they then made 188 hp and there is still 1 car left in sydney which is owned by Beech Thomas and is the chickadee chicken celica
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Location:
Canberra
Registered:
May 2002
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Re: 18rg power potential 145hp to ????
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Sun, 07 July 2002 04:52
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Sbyder: Where did you get your Cams from and what sizes are they?
Also does anyone know what the lumpiest regring would be?
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Location:
melbourne
Registered:
May 2002
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Re: 18rg power potential 145hp to ????
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Sun, 07 July 2002 07:44
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if you wont a good cam try 304 duration and 435 lift
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