Rb20Det And Rb25Det

[paulos]

Im being told that rb20's make power easier than 25's

Also that my mate has 270rwkw from his rb20det...

There was a thread created a while ago for people with rb20's making 260rwkw or more and all seemd to have trouble getting there

Just to confirm rb20's make less torque, have more turbo lag and as a genral make less power if the mods where the same for an rb25

?

[Lithium]

Im being told that rb20's make power easier than 25's

No. A mate of mine has basically the same mods on his RB20DET as I have on my RB25DET. We both have upgraded turbos on stock manifolds, stock motors, aftermarket ECU and fuel system etc.

My car is tuned on BP98 at 17psi and makes 301wkw, same dyno his car tuned on 30% ethanol and 21psi makes 295kw. He gives me a bit of a run for my money on midrange torque - probably more to do with extra boost and better fuel, but his falls flat at 6000rpm and mine keeps making more power. On the same fuel and boost I have roughly 50kw on him, better off boost torque and way better midrange.

No comparison.

[t_revz]

simonr32 swapped rb20 for a 25 and transferred parts across and ended up with 120ish more rwhp.

[paulos]

Il grab the list of mods and let you guys decide

apparently stock injectors, stock ecu.. 3incj zorst, fmic, 18psi, flat top pistons, to4e turbo and a tune making 256rwkw

il update if there are any mods i left out

[SimonR32]

simonr32 swapped rb20 for a 25 and transferred parts across and ended up with 120ish more rwhp.

Not exactly, it's got a new exhaust manifold, inlet manifold and different turbo...

[t_revz]

Not exactly, it's got a new exhaust manifold, inlet manifold and different turbo...

have to read through it again. thought you had that turbo on when you blew the box up

[PaulosECR33]

Il grab the list of mods and let you guys decide

apparently stock injectors, stock ecu.. 3incj zorst, fmic, 18psi, flat top pistons, to4e turbo and a tune making 256rwkw

il update if there are any mods i left out

stock injectors would not let you produce that much power.

[Simon-S14]

i made similar power on stock injectors... although with modified FPR (tapped with a hammer) and injectors at 90% duty.... but not far off the mark.

to the OP

both engines respond well to mods. the 25 does it better tho

[joeyjoejoejuniorshabadoo]

RB20 fanbois will say ANYTHING

truth is they are not as good as an RB25... the end

[Dose Pipe Sutututu]

I've owned both RB20DET and RB25DET, for someone to say RB20DET makes more power easier than RB25DET mod for mod, they must be on drugs

Mod for mod, the RB25DET will make more power easily, why on earth would R32 boys be putting RB25DET motors into their cars? Go figure!

[Rolls]

The rb25 will be better at everything, end of story.

You can get similar power levels with identical supporting mods but the 25 will make a wider spread and come on boost quicker. It will also be quicker off boost.

[JonnoHR31]

and (puts flame suit on) revs just as hard as a 20