Rb20 - Rb25 Options For R32 Gtst

[Simon-S14]

yeah and when it blows (it will.. they all do) you'll need need to spend a fortune fixing it

[simor32]

dude go the 25det man, i did it and its great, about 5k to do it properly with r33 box, tailshaft mods, ect. do it, you no u want to lol. later

[bubba]

Im in the process of starting a engine swap and this thread is inspiring me to forget the 25, and go with a 30 setup, in my r32!!

Im guessing the potential of the 30 is significantly higher than the 25, and if im there i may as well go all out,

like mentioned earlier, im replacing the original motor, might as well have the potential there for future perfomance gains.

thanx guys...for making me wanna spend more money...lol

great thread, ill be keepin an eye on this one.

Cheers

Peter

The tradeoff between a 25 and a 30 (unless you're going to spend BIG dollars on the 30) is revs for torque. Similar mods (internal and external) both engines would likely make around the same power, the 30 would make it a lot sooner but unless you build it to rev to 8k the 25 will be able to make similar power due to the higher revs (that's my theory anyway..).

I went for the 30 because I was offered a forged bottom end for a good price, going from the 20 to the 30 was amazing.. the abundance of torque in practically any gear is arousing.. the 20 would never pull up a hill at 2000rpm in 5th! I love it!