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Pros And Cons Of Putting A Rb25 Into A R32gts-t

335

By 335,
in Engines & Forced Induction

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Bunta Grand Master

Bunta

Posted
Posted

yeah i owned on for a while...and as far as i was concerned it was all pros!

but i guess depending on your power goal a con could be that you may spend more money for a similar power level

eg if you are chasing anything under 250rwkw you can do it on a RB20 while being still relatively responsive and save money by not having to do the swap, if you want over 250rwkw the extra capacity wil help get higer power with out getting too laggy

335 Rising Star

335

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I am looking at 300 to 350 rwhp so 250 rwkw should be good. I don't want to have to go through abunch of stuff just to get that. If its easier and cheaper to keep the RB 20 to get this, I will. Friend has a RB25 he wants to sell me for about 300 or 500 dollars. But I would need to find a transmission, wiring, computer and so on. Worth it? I would than still have to buy the parts to make the RB25 get 300 to 350 rwhp

Worth it?

PM-R33 Grand Master

PM-R33

Posted
Posted

All pro's mate, go for it. Think of it this way, if you can get a RB25 for a couple of grand and spend few grand on it, you'll have more power and better respone than if you had spent the money on the RB20..

Bunta Grand Master

Bunta

Posted
Posted
the only con is the conversion cost.

after that it's all pros.

You will spend similar money on either engine to get to your target power after that.

I agree totally, but got his power level im not sure if the 25 would be that much better for the cost ,plus im not sure how good a $300 RB25 would be :S

quiksta Community Regular

quiksta

Posted
Posted

No cons really besides traction. One of my mates done this conversion along with basic supporting mods and we were blown away with the results. Although he wasn't pushing massive power (208rwks), the response of the rb25 along with the weight of the 32 made it a bit of a street weapon. Here's the link of his for sale ad.

http://www.skylinesaustralia.com/forums/SOLD-t130416.html

Lithium Grand Master

Lithium

Posted
Posted
rb25's have weak ringlands and don't like bouncing off the limiter

if you are going to drift it keep the 20 and put a bigger turbo. otherwise its all pro's

I often wonder if tuners over there are a bit rough when hearing this kind of thing - or is this people running stock turbo and no tune?

All pros aside from the conversion cost imho.

Shaun Mentor

Shaun

Posted
Posted

Dont forget about going through all the legalities with the extra capacity of an RB25. Im not sure if your in NSW, but the capacity increase falls outside the owner certified modification thing in NSW. R32's only came out with RB25DE's, so you'll have to get an engineers certificate. This means that everything will have to look standard including the intake, charcoal cannister, breather hoses going back into inlet, quiet exhaust etc, etc. This is a massive con!

I did, however, get my R32 with a single turbo RB26 re registered and engineered (no thanks to the RTA), so it is possible. Its a massive fcuking effort though.

Shaun.

blind_elk Grand Master

blind_elk

Posted
Posted

I've done the upgrade, fitting a Stagea RD25DET into my R32 GTS4. I also fitted an aftermarket ECU, lightweight flywheel and HD clutch assembly. I'm still using the original gearbox.

Went from 115 awkW to 180 awkW. The RB25 is so torquey that I ended up changing to the Stagea diffs (4.1 instead of 4.375).

Building a RB30DET is a lot of stuffing around. RB25DET is factory- just buy one and fit it. Get a R33 halfcut, and you will have everything you need.

cln Proficient

cln

Posted
Posted

i rb25'd my 32, like bunta said unless ur goin for 250kw+ keep the 20 and strap on a 2530(or something larger).. you'll love it. no point doing the conversion unless your gonna go all the way. nothing is more fun than bouncing a 20 off the limiter!!!

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