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RB30 Head Gasket thickness for more boost

VL_Turbo
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FiXtUrE Enthusiast

FiXtUrE

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8:5;1 comp in ideal for boost. There are copper head gaskets that are custom made if you know the thinness to achieve 8:5:1.. 9;1 comp is fine… but you will be limited to how much boost you can run.

Www.coppergaskets.com.au. If your after one 👍

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Piggaz
Piggaz

What’s the limit of boost at 9.0:1? Very curious to know.

FiXtUrE
FiXtUrE

From my understanding you can achieve about 5 - 10 psi with 9:1 - 9:5:1 comp safely before it goes pop.. before you think this wack boost levels, you have to consider the turbo, dump back exhaust, fmi

FiXtUrE
FiXtUrE

Regardless to fuel it’s the boost/comp pressure that will determine if it gos pop or not.

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Piggaz Grand Master

Piggaz

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Posted
26 minutes ago, FiXtUrE said:

8:5;1 comp in ideal for boost. There are copper head gaskets that are custom made if you know the thinness to achieve 8:5:1.. 9;1 comp is fine… but you will be limited to how much boost you can run.

Www.coppergaskets.com.au. If your after one 👍

What’s the limit of boost at 9.0:1? Very curious to know.

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FiXtUrE Enthusiast

FiXtUrE

Posted
Posted

From my understanding you can achieve about 5 - 10 psi with 9:1 - 9:5:1 comp safely before it goes pop.. before you think this wack boost levels, you have to consider the turbo, dump back exhaust, fmic etc your going to use on your rb30. 

what power do you want, and is it a 5sp or auto?

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VL_Turbo Contributor

VL_Turbo

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3 minutes ago, FiXtUrE said:

From my understanding you can achieve about 5 - 10 psi with 9:1 - 9:5:1 comp safely before it goes pop.. before you think this wack boost levels, you have to consider the turbo, dump back exhaust, fmic etc your going to use on your rb30. 

what power do you want, and is it a 5sp or auto?

You can leave the stock comp and put it on e85 and run higher boost?

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted
2 hours ago, FiXtUrE said:

Regardless to fuel it’s the boost/comp pressure that will determine if it gos pop or not.

what comp ratio do you think this thing has to run 100psi of boost?

 

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FiXtUrE Enthusiast

FiXtUrE

Posted
Posted

Lol… I doubt it’s running 100psi.

rb30 with 8:5:1 head gasket + stock mani with spacer adaptor to blolt on rb25 t03 (with ceramic wheel) and possibly stock dump depending where turbo sits + custom mid pipe + r31 house rb20det cat back + hr31 stock intercooler at a maximum 12 psi + nistune should the job with auto (400kw)

steel wheel t03 + r32 gtr or r31 house fmic + forgies with big boost, go for your life with manual if you can find a clutch up to the job 👍

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Murray_Calavera Mentor

Murray_Calavera

Posted
Posted
7 hours ago, FiXtUrE said:

Lol… I doubt it’s running 100psi.

rb30 with 8:5:1 head gasket + stock mani with spacer adaptor to blolt on rb25 t03 (with ceramic wheel) and possibly stock dump depending where turbo sits + custom mid pipe + r31 house rb20det cat back + hr31 stock intercooler at a maximum 12 psi + nistune should the job with auto (400kw)

steel wheel t03 + r32 gtr or r31 house fmic + forgies with big boost, go for your life with manual if you can find a clutch up to the job 👍

Yeah I doubt these 6 second 200+mph cars are running the boost they say they are. 

I mean look at this guy claiming he is running 90+psi of boost and a 250 shot. 

Why can't they just be honest and say they are really running 12psi of boost. 

 

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Murray_Calavera Mentor

Murray_Calavera

Posted
Posted

It's basically Hollywood isn't it? I mean look at this! You can see the car on the dyno, see the data from the log.... 600KPA target. 

More like 82KPA target and a bunch of YouTube Hollywood magic showing fake numbers and fake data, right? 

 

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GTSBoy Grand Master

GTSBoy

Posted
Posted
9 hours ago, FiXtUrE said:

Lol… I doubt it’s running 100psi.

rb30 with 8:5:1 head gasket + stock mani with spacer adaptor to blolt on rb25 t03 (with ceramic wheel) and possibly stock dump depending where turbo sits + custom mid pipe + r31 house rb20det cat back + hr31 stock intercooler at a maximum 12 psi + nistune should the job with auto (400kw)

steel wheel t03 + r32 gtr or r31 house fmic + forgies with big boost, go for your life with manual if you can find a clutch up to the job 👍

What the hell kind of crack smoking joke is this? That is literally double the power possible with a stock ceramic shitter. When I'm talking about shards here, they can either be what you are on, or the pieces of turbine. Take your pick.

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