Questions Regarding Turbo Selection For Rb25det

[Housie]

Im pretty sure i know the answer, but would like to have it confirmed to reduce my concerns.

Firstly, unfortunelty all my spare cash in getting poured into my wedding fund, and outlaying $3000+ for a bolt on HKS/Garrett turbo isnt even thinkable

BUT, im crapping myself about the stock turbo, its going strong but the car's comming up tp 90,000kms and i sure as hell dont want bits of worn ceramic reeking havoc anytime soon.

So, im set on a new Turbo. After hours of reading the massive debates about MonstA, JJR and KKR turbos i think the general concensus is to stear clear of MonstA all together. JJR and KKR most people consider to be identical, correct? with a few pointing out slight differences such as how long each individual turbo is balanced etc with most suggesting KKR receive superior balancing compared to JJR. I think i even read that KKR is balanced using VSR which apparently Garrett use???

So at this stage of my essay, it would appear that KKR are the best turbo chargers in my budget (also apparently a very good warranty???).

OK, so now do i go the kkr 430 or kkr 480?

My overal aim performance wise it to achieve 250-270rwkws.

I need a turbo that can help me achieve this with the following supporting mods

FMIC

Apexi Filter

IN/EX Adjustable Cam Gears

GTR Injectors (unrelated question 1: are they a direct replacement for the rb25det stock injectors? Unrelated question 2, is an aftermarket ECU required for injector swap? it is right?)

4inch Catback Exhaust

Hiflow Cat

3" Dump & front pipes

Fuel Pump (undecided on exact pump to use, recomendations?)

So the kkr 430 will have less lag, but will have to work harder to achieve 250-270rwkws. Were as the kkr 480 will lag like bs but will easily push the required PSI to hit 250-270rwkws.

So, what turbo out of the two do u recommend?

At this stage im leaning towards the kkr430.

Agree? Disagree? Discuss!

All replys appreciated!!!

Cheers Jason

[PM-R33]

OK, so now do i go the kkr 430 or kkr 480?

My overal aim performance wise it to achieve 250-270rwkws.

If you want to push over 250kw forget the KKR430, go the kkr480. The most i have seen out of a KKR480 is around 260kw at 18-19psi.

GTR Injectors (unrelated question 1: are they a direct replacement for the rb25det stock injectors? Unrelated question 2, is an aftermarket ECU required for injector swap? it is right?)

GTR injectors wont fit the RB25 as they are top feed not side feed. Therefore if you want to get out of it cheap you can use S15 injectors. But honestly just fork out a bit more cash and get yourself some Nismo 555cc injectors. Yes you will need some form of engine management so you can scale the new injectors. The stock ECU won't allow you to do this.

Fuel Pump (undecided on exact pump to use, recomendations?)

Either install a Bosch 040, or if you want to save yourself the hassle in modifying one to fit, get a direct replacement Nismo/Tomei item.

[The Bogan]

1. Ive been running 14 psi on my stock turbo and its got 170k on the clock, But its only a streeter so it doesnt see wot for too long and i change the oil at every 2.5k klms.

2. Im upgrading to GT30 soon though, BUT, in my opinion save your dollars (hide it from your misses) and buy quality later instead of sacrificing it now to save a couple of bucks.

3. A after market EMS is a must to get a safe tune in my opinion.

4. I have to many opinions, LOL.

5. My 2 cents.

[SLY33]

BUT, im crapping myself about the stock turbo, its going strong but the car's comming up tp 90,000kms and i sure as hell dont want bits of worn ceramic reeking havoc anytime soon.

Sorry this wont ease your mind, but if your cars coming up to 90k kms, its a safe bet that its already well past that figure.

You didnt mention looking at secondhand options? There are usually some good HKS stuff around that may suit your budget, look around and see if you can find something nice, maybe even a used GCG highflow. Sure its used, but you could end up with a more responsive and better quality turbo

[bluey33]

Warranty will not cover the turbo once it is on the car.

You seem to have read a lot.

Surprised you have not read that you get what you pay for when it comes to turbos.

Don't stimp on cheap products.

The KKR will need many extras which will bring the price up a bit more which isn't much less then a highflow (which I still wouldn't buy) and less responsive.

[Amec]

agree the KKR480 will get you the power you are seeking, but will not come on boost until over 4000 rpm.

[joeyjoejoejuniorshabadoo]

Also only get an exhaust cam gear as you will want to retain vct i'm guessin...

[Gothik33]

hows it going

firstly i'll list my mods,

kkr-430, 555cc nismo squirters, power fc, full 3.5 inch turbo back exhaust. front mount.

i'm running 1.15 bar (almost 17psi) and i'm getting 308hp (230kw), and the turbo has a long way to go before it runs out of puff. i'm hitting full boost at 3950revs and holding strong to 7000, torque is quite good too, however the KKR internal wastegates are super shitty. like unbelievably bullshit. sorry about the swearing but i'm totally disappointed with their quality. it leaks like a sieve. i've had to replace the wastegate actuator with a hks item and that works a treat. no leak at all. the turbo itself is quite responsive, great fun to drive and overall not too bad on fuel with the right tune. however, please remember you have to have a new oil supply line made up when your installing the KKR series (430 or any other) as they are a journal bearing and need more oil than your stock ball bearing unit. oil starvation will kill your KKR. anyways hope that helps, good luck in your quest for ponies. i will be selling my kkr 430 in 2-3 months, going ball bearing route. let me know if your interested. cheers

Slav

[Housie]

wow, cheers for quick responses.

Didnt really consider the 2nd hand option, alot of dogey stuff gets done as we all know lol.

Air research is garretts old stuff ay? Found a to4 Air research done under 2000km/s since being hiflowed ($2000 worth apprantly, with reciepts). Came off a 13b. Sounds ok? but that would need to be high mounted correct? and new flanges fabricated etc..... owww bolt on is so easy, dont want to have to pull the welder out the shed HAHA

[TiTAN]

something that came off a rotary will probably have a huge exhaust A/R that is not suitable to a 2.5L piston engine.

[gt-ahhh!]

kkr-430, 555cc nismo squirters, power fc, full 3.5 inch turbo back exhaust. front mount.

i'm running 1.15 bar (almost 17psi) and i'm getting 308hp (230kw), and the turbo has a long way to go before it runs out of puff. i'm hitting full boost at 3950revs and holding strong to 7000, torque is quite good too, however the KKR internal wastegates are super shitty. like unbelievably bullshit. sorry about the swearing but i'm totally disappointed with their quality. it leaks like a sieve. i've had to replace the wastegate actuator with a hks item and that works a treat. no leak at all. the turbo itself is quite responsive, great fun to drive and overall not too bad on fuel with the right tune. Slav

dude i have similar set up but mines a dog. im hoping my ebc and stock ecu remap will fix it. full boost not till 5000+rpm = ridiculous. whats your boost control? i reckon it must be the wastegate leaking, but the actuator looks the same as the old hks one i had on my stock turbz?

i would kill for response.

[SLY-25T]

BUT, im crapping myself about the stock turbo, its going strong but the car's comming up tp 90,000kms and i sure as hell dont want bits of worn ceramic reeking havoc anytime soon.

i got a 94 r33 gtst with around 190 000 on the clock and its still going strong with stock turbo. i rekon u got a fair while left with the stockie so u shouldnt rush into buying a new one and goin the cheap route. save up and get a decent one so it lasts u ages and it bolts on with ease.

thats wat i rekon anyway gl with the search and build!!

[bozodos]

tbqh I'm really over my KKR480 on mine, it was dynoed at 240rwkw at 18psi for the previous owner, and though after getting a mate to stuff around with the wastegate actuator and replacing the shit manifold gasket which was on there with an OEM one, and hopefully soon changing the V-band, it doesen't feel all that fast. If i had to replace it, i'd definitely going for a HKS/Garrett ball bearing as a replacement.

mind you though, im lucky that mine starts to boost at ~2500rpm, another guy I know has one on an R33 and yeah it dosen't really start to boost until 4000rpm, just seems like theres all these other little things that play up with one of these turbos!

[H@ME]

i installed kkr480 but awaiting an ecu n tune..

[sl33py]

Errrr is your current turbo making strange noises like it's going to die, or you're just replacing it out of paranoia? have you boosted it? If not, why not just wait until it starts playing up before boosting and doing those other mods. That way the wedding will have passed and you'll have time to save up and buy whatever high quality parts you want instead of scrounging for whatever you can get in the meantime. It's not a sure thing that a turbo will find it's way into the cylinders anyway. The fans in my stock one completely disintegrated but no parts were found at all haha. I'd say if it isn't broke right now, don't fix it. Oh, and don't bounce it off the limiter etc in the meantime... until you can afford to replace parts.

[nuclear_skyline]

get a highflow... I run 230rwkw with a GCG highflow and if I got some injectors i'd be able to push 245rwkw without the monster lag issues you guys are talking about! I'm on full 15psi by about 3200rpm. Plus, you can keep you standard oil and water lines... Keep it looking factory for when the poo poo pull you over.

[STATUS]

I went for a fang i the old HPI R34 and the KKR turbo on that thing was shouse. HKS GT-RS or a decent GCG high flow would be far better.

[Housie]

What about this bolt on kit?

Seems a good price for a garrett setup.

What are the arguments for internal V's External Gate?

This kit is internal.

http://www.tweakit.net/shop/product_info.p...roducts_id=6637

[edit] WTF Turbine Housing are they using on this kit? Doesnt match up to any GT30 on turbobygarrett.com HELP!

Edited September 9, 2008 by Housie

[Housie]

Errrr is your current turbo making strange noises like it's going to die, or you're just replacing it out of paranoia? have you boosted it?

Its running the lowest duty cycle % with the gizmo IBC, so around 8 PSI max. Its going great, but rather replace a turbo now than an engine later.

Oh, and don't bounce it off the limiter etc in the meantime... until you can afford to replace parts.

thats the fun bit LOL

Edited September 9, 2008 by Housie

[sl33py]

Haha ok... I'd look into how many times a failed turbo = f'cked engine though man... my turbo died with no ill consequence to the engine at all. Same with a mates just recently. Mind you, both those cars have done well over 100,000kms (clocks read a little over 100ks). I'm just looking at it from cheap shortcuts now vs nicer gear later. I hate doing things half assed.

BTW, HKS GT-RS FTW, I've got one and it's great