What Can A Rb25 Handle?

[crazy_ado]

Just want to know what sort of boost a RB25 can handle with a standard bottom end?

Also if anyone has any experiance with auto trans in r33, how much power can they handle before they fail? and

How power loss compares between auto and manual trans in a 33?

Any help would be appreciated.

[The Dan]

Just want to know what sort of boost a RB25 can handle with a standard bottom end?

Also if anyone has any experiance with auto trans in r33, how much power can they handle before they fail? and

How power loss compares between auto and manual trans in a 33?

Any help would be appreciated.

Have seen around 50psi.

I've seen autos handle 250rwkw and heard of them breaking at 220rwkw

About 50hp loss I think

[W0rp3D]

the standard drive train loss equation is 10-20% for manuals and 20-30% for auto's.

[PM-R33]

Just want to know what sort of boost a RB25 can handle with a standard bottom end?

This has been covered A LOT of times, please search through the forums and you will learn the answers.

The simple fact is there is no such thing as "how much boost can they handle".

Boost doesn't kill engines.

Running 20psi from a T28 at 7000RPM making 250rwkw is a lot different from running 15psi from a T04Z at 7000RPM making 350rwkw. *figures are just made up*

Please research into what "Boost" actually means as turbos don't technically make boost, they produce high amounts of airflow that increases as the RPM increases which in turn is too much for the engine to swallow and therefore the pressure builds up in the intake system. This pressure is what we call boost. If you get a good understanding of how turbochargers work and what actually can destroy/make an engine fail you will learn a lot.

Also let's please not go into the whole drivetrain loss argument, that has been covered to death aswell.

Edited November 26, 2010 by PM-R33

[R31Nismoid]

its not a percentage, it'd be fixed.

nissan quoted from memory 9kw between auto and manual fly figures on the RB25.

[PM-R33]

Here are two of probably the best threads regarding drivetrain loss that I know of on these forums. Once you read should cover everything (Also saves this thread from turning into one of them again.)

http://www.skylinesaustralia.com/forums/Bh...drivetrain+loss

http://www.skylinesaustralia.com/forums/Dy...drivetrain+loss

[KiwiRS4T]

You can get your auto rebuilt to handle 300kw+ or you could save the money and get a manual box.