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The rb20 and rb25

yoshiii335

By yoshiii335,
in Engines & Forced Induction

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yoshiii335 Rising Star

yoshiii335

Posted
Posted

The rb20 and rb25

Hello,

I found some info from testing done on the r32 gtst and the r33 gtst.

Its often said seemingly on websites that the rb20 is a motor lacking torque under 3000 rpm and that the rb25 is better, stock vs stock.

I know that the rb25 is a more powerful motor and has more torque stock vs stock rb20.

But in these test I found, it seems that the rb20 in a r32 gtst stock compared to a rb25 in a stock r33 gtst is not that bad.

 

RB20.jpg

RB25.jpg

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https://www.sau.com.au/forums/topic/466486-the-rb20-and-rb25/
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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

You never give up do you?

Those graphs are not "tests" or dyno charts - they are computer models invented by some one.

The harsh facts are that the RB20DET makes 265Nm

The RB25DET makes 294Nm

and the RB25 Neo DET which everyone is telling you to get makes 343Nm which is  significantly more than the RB20 

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R_34 Community Regular

R_34

Posted
Posted

A guy in france put his r32 gtst bone stock on a dyno, here is the sheet :

 

152585BancOEM001.jpg

 

f**king small turbo an still max torque beyond 5000 rpm.

Stock wise the gap might not be that big but who here is still stock anyway. I have a 20, a mate of mine have a 25 and the 25 is much nicer to drive despite having a taller diff ratio and bigger wheels. So yes the 20 is a bitch down low, at high rpm i prefer the feeling of my shitty 20 (mostly thanks to the 4.36 diff I have) but below 4000 this is a no brainer.

hardsteppa Grand Master

hardsteppa

Posted
Posted

Yoshii you need to realise theyre both internal combustion engines which are dinosaur technology now, same basic design for over 100 years. You need to be progressive and look towards the hybrid technology Porsche, Fiat and Rocklasser are using or possibly something nuclear-fission powered if you're serious about this car of yours being half decent...otherwise i'd have to assume that this thread is just a troll...?

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