Rb20 Wastegate On Rb25

[040122]

hi i tried searching but found no usefull results.i want to know if anyone has put an rb20 wastegate on their rb25 turbo. has there been problems? was it easy/hard? is it neccessary to do other mods? currently all i have is 3inch cat back. i want to do this mod because i want my car to appear stock. thanks guys

[GTSBoy]

It has been done and posted about more times than you have had a hot dinner. It is a triviality.

[040122]

okey dokey then. any other opinions.

[scotty nm35]

My opinion? Try searching using Google, you may get better results.

[niZmO_Man]

Easy. Unbolt existing, bolt in RB20, enjoy 10psi.

What is so hard to grasp?

[DoseVader]

In short yes it works 10psi all day everyday.

[Ben C34]

In order.

Yes

No

Easy

No

[040122]

to the key board heros, cheers for the attitude, im innocently trying to learn, thank you to the people that had some useful input.

[Blackkers]

yeah its super easy man your grandma could do it. just remove the standard boost solenoid. you can unplug it and throw it away

[Ben C34]

Some people learn by researching their own info.

Others love the spoon.

Nom nom nom.

[hardsteppa]

.i want to know if anyone has put an rb20 wastegate on their rb25 turbo.

thing is though son, I know it sounds like, oh wow I'd be able to boost like, all the way up to 10 psi....but I found it made point-oh-shite all of difference and unless you get one for 10 bucks, not worth chasing down.

I would suggest the adjustable kinugawa wastegate with the low-pressure spring, that will bolt on, give more responsive boost as well as some degree of adjustable boost control. They're only $100-something off ebay new.

[self_slaughter]

Yeah I dropped one on my neo because my actuator couldn't hold shit anymore.

As said not really worth the effort unless you score it for next to nothing.

Not gunna suddenly make the car a powerhouse over a couple of psi.

[040122]

ok cool ill check that out

[GTSBoy]

ok cool ill check that out

Be aware that you can't run more than about 12 psi on a stock RB25 ECU without it cracking the shits at you. After that (actually really, after about 10 psi) you are into the need to tune/swap* ECU area already.

*swap on R33, tune (via Nistune) on R34, or swap.

[040122]

does anyone think a turbo back exhaust would be a better performance mod than winding the boost up 3 psi

[GTSBoy]

No.

The car will feel better with 10 psi than it will with 7 psi and a dump added.

But it's not as if it's an either-or sort of thing. A good dump pipe is almost an essential upgrade. The increased internal volume and better flow of the dump (whether drainpipe type or a good long split) will speed up the building of boost and make the car feel stronger even without adding any extra boost. And it will usually also add some extra boost on its own as well, just from reduced restriction. Given the price (a few hundred), it's pretty much a forgone conclusion that you should have one.

And naturally, you should always run any (stockish) turbo car at the highest boost you can (within the limits of the various support systems) so as to maximise benefit of having a turbo. So a boost control upgrade is also a near-compulsory thing. And it's also only a low amount of money (between $20 and $500 for your typical options).

Just do it (both).

[DoseVader]

But at the end of the day you will probably want a good free flowing exhaust too after adding a little extra boost with a split dump pipe.

[GTSBoy]

He already has a cat back. Hence why I just focused on the dump. Probably should have mentioned a better cat too.

[DoseVader]

He already has a cat back. Hence why I just focused on the dump. Probably should have mentioned a better cat too.

My bad

[040122]

hey about the kinugawa wastegates; do you have to mess around with the boost solenoid when you install it? cheers