Rb20 Better Than Rb25 Or 26?

[rory_kieran]

Hi,

I have a R32 GTS-T. Mods include full exhaust system, boost controller, coil packs, air intake and soon to be fmic and apexi fc. Just a question? Is it possible to get this baby to smoke your average R33 or R34 and even stand in the shadow of a GTR?

I've been told they have no bottom end but there must be a way to fix this? Any points of view out there. I just think that If I spend another $10000 or so on carbon bonnet, coil overs, bearing turbo, fmic and other items without knowing what its worth.

Thanks

[Simon-S14]

mod for mod, the 25/26 wil always beat the 20 due to its extra capacity. however there are a few highpowered RB20's arounjd the place that with a grippy set up car would more then likely blow away a stock GTR...

as for having no bottom end.. well they are only a 2 litre motor, so you either need to rev them to get power, or add capacity

either way, i love my rb20, makes great power for bugger all bucks!

[JCMarshall_Law]

what simon said, mod for mod, $ for $ no way your going to get a rb20 to beat a rb25 or 26. But sure spend stupid amounts of cash and you could probably "beat" a stock GTR.

[R31Nismoid]

dollar for dollar spent... RB20 wont ever match an RB25/RB26

Its just not going to happen. Capacity dictates much more broad power curves so more power, for longer.

The only way to be better, is to spend more, and i mean a LOT more money than the other person

[N1GTR]

  rory_kieran said:

Hi,

I have a R32 GTS-T. Mods include full exhaust system, boost controller, coil packs, air intake and soon to be fmic and apexi fc. Just a question? Is it possible to get this baby to smoke your average R33 or R34 and even stand in the shadow of a GTR?

I've been told they have no bottom end but there must be a way to fix this? Any points of view out there. I just think that If I spend another $10000 or so on carbon bonnet, coil overs, bearing turbo, fmic and other items without knowing what its worth.

Thanks

How do you mean "beat" a GTR? Can the GTR be modified aswel?

[R31Nismoid]

also, if you have an RB20, stick with it... but if you want much more than around 220-240rwkw, its time to look at a motor conversion

[_8OO5TED_]

Power FC, GTR injectors and a HKS GT2530 will give you 270ish rwhp, and a well powered, reliable and responsive RB20DET. going any bigger turbo will give you excessive lag, unless u like lag

Edited August 17, 2006 by _8OO5TED_

[nF]

rb25 has a far better head for flow than rb20 so you're already losing

the 500cc difference means squat all in comparison in my opinion

rb25 isn't built any tougher than an rb20 though, so you'll bend or break things anyway

[WazR32GTSt]

rb20 = lag

but its f**king reliable and very kind to its owner...

not sure one could say the same for an rb26.. it generally needs money adn TLC to keep going from what i have read

[Roy]

Dont forget, R32 GTSt is between 1250-1300kg. An R32 GTR more like 1550kg. So you dont really miss the torque as the car is reasonably light.

If you want general all rounf performance keep an eye on power to weight. An R32 GTSt with 230rwkws will not be a slow car. With sensible suspension, wheels and tyres it will do mid 12s at the drags, and be on par if not quicker then std turbo GTRs. (Gross generalisation but i think there is some truth to it)

[Roy]

The head flow thing is interesting as well. Sure the RB25 has bigger valves, but what is the ratio of the cc of each cylinder to the total inlet and exhaust valve face area?

I have never done the calc, but could be interesting. Ditto the SR20 vs the RB20, as each cylinder has less cc, and the smaller physical valve size may not be such a big deal when you look at it as a percentage of cylinder displacement.

[N1GTR]

  WazR32GTSt said:

rb20 = lag

but its f**king reliable and very kind to its owner...

not sure one could say the same for an rb26.. it generally needs money adn TLC to keep going from what i have read

With RB26 and being reliable, they need one good rebuild IMO and that cant include shortcuts, then go and abuse it however you please!

If you had a standard RB26 and didnt do boost exhaust etc and treated it well it would last for ages, the thing is, who buys a GTR to baby it? They're all driven as hard as they can be at one point in their life at least, and after 200,000k's in some cases you cant really blame them for bearing failure etc

  Roy said:

Dont forget, R32 GTSt is between 1250-1300kg. An R32 GTR more like 1550kg. So you dont really miss the torque as the car is reasonably light.

If you want general all rounf performance keep an eye on power to weight. An R32 GTSt with 230rwkws will not be a slow car. With sensible suspension, wheels and tyres it will do mid 12s at the drags, and be on par if not quicker then std turbo GTRs. (Gross generalisation but i think there is some truth to it)

Standard turbo GTR R32 running 15psi and clutch etc should do a mid to low 12

[Roy]

When are you GTR guys going to come to terms with the fact that your cars plain suck!

...lol and when are ppl going to stop comparing them? A neat GTSt will be a good all round car. A std GTR is a good all round car. From what i have seen a GTR doesnt have to be very modded to be an even better car, as the factory gave the thing pretty good gear from the start.

...doesnt change the fact that GTR owners have to use velcro shoes because they struggle with shoe laces

[N1GTR]

  Roy said:

When are you GTR guys going to come to terms with the fact that your cars plain suck!

Lol

I give credit where credit is due

I drove an R32 GTST, the boost never came, even though it was lighter than a GTR which was good i would still take a more peaky turbo/motor combo over the RB20 standard setup

Anyway this thread isnt about GTR vs the world, in answer to the question, you can get heaps of power out of the RB20 for the R32 shell (good power to weight i mean) but as for it matching a GTR, doubtful IMO, there are some out there with huge power, but power is no good without traction

[Roy]

  N1GTR said:

I give credit where credit is due

...i dont

Im going to so kick some GTR ass at Wakefield....and if i dont ive got a long list of excuses already prepared.

[silver gts-t]

if u want reliability then stick with the rb20

funny that the rb20 is older yet seems there is many more 25's and 26's blowing up... maybe due to the fact that every man and his dog has either an r33 or 89 gtr

[N1GTR]

  Roy said:

...i dont

Im going to so kick some GTR ass at Wakefield....and if i dont ive got a long list of excuses already prepared.

LOL!!!

Ill be there, look for the guy hungover with an SAU shirt on and a can in hand - come say Hi

[N1GTR]

  silver gts-t said:

if u want reliability then stick with the rb20

funny that the rb20 is older yet seems there is many more 25's and 26's blowing up... maybe due to the fact that every man and his dog has either an r33 or 89 gtr

Also, the more powerful motors are thrashed harder IMO so they have a much harder life

Rebuild time is just a good chance to upgrade anyway

[predator]

there just as many dead or dying rb20's out there in my experience as anything else.

[BlueRB240]

Another RB20 vs RB25 vs RB26? I say we forget about it because who the hell cares. Now for the real question, can a Unicorn beat Lion in a fight?