Twin Turbo Rb25 Gtst R33

[Nismo_Boy]

Personally, I think the RB25DETT deal sounds too good to be true.

I agree. I don’t advise any one to do such a conversion IMHO. The motor in the Silvia owes big money. 600rwhp and a 10second time slip.

All sounds good, but could have been done ALOT cheaper starting out with an rb26dett.

[code blue]

well lets way up the prospects to get 300kw@wheels in a standard 2.6 i would expect that you would have to replace the turbos, ecu, at least then replace wiring loom? labour to install engine?? then you have to add the cost of the engine itself, keeping that in mind you have still standard internals!!! or you could rebuild your rb25 to suit the twin turbo setup , install an apexi , and go sick!! but guys dont get me wrong either we all know a gtr 2.6 would be the best option but also the most expensive, from what i see you dont have to run full boost 300kw@wheels anyway . after any car running this sort of power figures would need to be modified- but the guy claims with correct tunning and engine combo this etup would out preform a standard 2.6tt package and plans to market it as GODZILLA KILLA.only time will tell hey!!

[EnricoPalazzo]

Steves engine runs a thicker headgasket lowering compression to 8.6, and he told me this is very important to keep his engine alive, sorta like engine insurance

[Sciby]

well lets way up the prospects  to get 300kw@wheels in a standard 2.6 i would expect that you would have to replace the turbos, ecu, at least then replace wiring loom? labour to install engine?? then you have to add the cost of the engine itself, keeping that in mind you have still standard internals!!! or you could rebuild your rb25 to suit the twin turbo setup , install an apexi , and go sick!! but guys dont get me wrong either we all know a gtr 2.6 would be the best option but also the most expensive, from what i see you dont have to run full boost 300kw@wheels anyway . after any car running this sort of power figures would need to be modified- but the guy claims with correct tunning and engine combo this etup would out preform a standard 2.6tt package and plans to market it as GODZILLA KILLA.only time will tell hey!!

I don't think you're thinking this through clearly. Yes, an engine transplant is expensive, but doing a non-factory, semi-custom twin turbo set up is going to be just as expensive. You can't just slap it all together, install an 'Apexi' (not sure what you're referring to there, I assume a PowerFC) and 'go sick'.

A proper rebuild is going to cost you at a very, cost cutting minimum of $2k (parts and labour), then $3k for the for the twin turbo kit, easily $1k for the installation and screwing about on that if you don't do it yourself which I'd advise against, then $1k for a Power FC, $750 (roughly) for an decent EBC, $1k for bigger injectors, $400 for a bigger fuel pump, then at least $500 for a decent tune, both for the PFC and the EBC. We're up to $10k already and you're still 100cc less than an RB26, which does make a difference.

An RB26 doesn't need the rebuild because the internals will handle up to 350-400rwkw from all reports, it doesn't need the labour of the rebuild, it comes with solid lifters, 440 injecters, fairly lumpy cams, an extra 100cc of capacity, all for roughly $6k, and that price generally includes the stock ECU and loom, if not afm's and and piping. A set of more aggresive cams would cost you roughly $1k for a set of bolt in Tomei's, and $1.5k for a set of better turbos. Installation would be roughly $1k, so $9.5k there.

I'm sure you're saying "$500, so what?" but the thing is, the $9.5k will be just that. there won't be any hidden problems like finding out the manifold you got hasn't be welded properly because it's a 'custom' job, or that extra injector controller and injectors is set up dangerously, or whoever you get to do it has to take an extra amount of time because the sellers didn't say that he'd have to **** about with X, Y and Z.

A car recieving an RB26 does not need to be heavily modified because it's a factory spec engine. Nissan have done the hard work for you, you almost literally give it a dust off, set the loom and ecu in the correct places and put it in.

I know you like this idea Code Blue, and if you're determined, nothing we say will stop you from doing it, but listen to Nismo_Boy, because he's done what you want to do.

[GTRgeoff]

My advice is to get some experience swinging spanners and welding, like I did, and it's nowhere near as expensive from there as most of it is DIY. Bollocks to buying someone elses kit. Also if you can afford the time, get a mech eng degree too, helps heaps.

Ultimately for you to get a workshop to do this will be very Exxy, and they'll love you for the money you'll spend.

[Sciby]

Geoff, how painful is the manifold side of things? Is it simply a case of slicing off the flanges and then getting them rewelded to match up the 25 head, or is it more complex than that?

[code blue]

so you would not need injectors ??? fuel pump???? pfc ???? ebc ????? or even dyno tune the rb26 to reach the same power level lol this would bump your rb26 conversion cost up a little bit , if you are going to compare apples to oranges why bother

[Sciby]

Don't need a PFC for the RB26, the 26 stock ECU is fine, because you're only changing mechanical devices: turbos and cams. You'll need some aftermarket help for the RB25 because it's stocker has no idea about having two turbos. The RB26 440ccinjectors should be fine, and apparently they have a bit more headroom at higher PSI levels, you might need a new fuel pump, so what's that? $400?

They're hardly apples and oranges, if you can't see that, you've got rocks in your head, but hey, it's your money, you do what you want. Good luck with it, hope it doesn't bite you in the arse... but I have a feeling it will.

[predator]

An RB26 doesn't need the rebuild because the internals will handle up to 350-400rwkw from all reports, it doesn't need the labour of the rebuild, it comes with solid lifters, 440 injecters, fairly lumpy cams, an extra 100cc of capacity, all for roughly $6k, and that price generally includes the stock ECU and loom, if not afm's and and piping. A set of more aggresive cams would cost you roughly $1k for a set of bolt in Tomei's, and $1.5k for a set of better turbos. Installation would be roughly $1k, so $9.5k there.

...BUT of course any rb26dett you pick up off the shelf from somewhere, its going to be as good as the day it came out of the factory yes?

anyhow, who knows how serious you are.. but just spend the money on building a very strong rb25det and single, don't dick around code blue.. GTR and twin turbo setups are for the most part for GTR and 4WD..crossing the water only works if you have a lot of money to throw at the project.

[Sciby]

pred: What? You mean all RB26's don't come from grandma's cars with pink ribbons around them?

[EnricoPalazzo]

All i can say is this kit is very different, look where the airfilter is1!!!???

[Wilso R32]

Wouldnt it be a cheaper optin to build an RB30dett like i am? extra 400cc, stock internals, gtr head loom ecu cet and half the price (long engine)

[GTRgeoff]

Geoff, how painful is the manifold side of things? Is it simply a case of slicing off the flanges and then getting them rewelded to match up the 25 head, or is it more complex than that?

Straight cut, shut, weld and port match on only 2 of the flanges. You wouldn't drill and tap to suit as there may be water jacket issues.

You don't want a GTR engine due to the crappy sump and the need to replace it or weld and baffle it.

Seriously I think I can do it for a lot less than people think, but shopping around is the key. If I don't like it I sell it and put my setup back on and maybe even make money, and learn a little.

[Sciby]

Well, maybe Code Blue will go ahead, and show us how expensive it really is.

[code blue]

you finished now??? well i look at it like this you could buy this system $3000.00 fit microtec ecu ( no need for afmeters) direct plug in unit with controller for $1300.00 run only 7psi boost pressure ( lets say 250kw@wheels ) lets forget the 300kw@wheels for the moment as we seem to all think that anyone who purchases the system would have to rebuild there engine ( only if you plan to run high boost pressure ) sure but his can be done at a later stage as finaces become available ( not all of us have 10k to spend in 1 hit on a 2.6 setup ) at this point i would have spent $5000.00 at worst i could always add engine rebuild - fuel pump- injectors- ect as your finaces would permit at a later stage ,the fact is any engine that produces 300kw@wheels will need alot of money injected into it!!!! regardless 2.5 2.6 , thats if you own a gtst , its not fun being the little brother of godzilla, we try to be like them at yet we get lectures even if we dream , if i had the money i would look long and hard, but i dont the point for any turbo system able to produce even 250kw@ for a gtst fully rebuilt with manifolds , dump pipes , braided oil lines silicon hose ect is still damn cheap for 3k sorry for dreaming!!!!!!!!!!

[Sciby]

Geez, someone's a bit touchy.

You have several people giving you helpful advice, in case you were about to blow a lot of money, and playing devil's advocate so you could look at it objectively, instead of going "WOW, TW!n TURB0S!! L33T! MUST HAVE! EVERYONE IS WRONG EXCEPT FOR ME AND MY DREAM! LOLZ!!!1!! KTHXBI" and blowing a wad of cash on something that could be done more effectively and safely and mildly more cheaply.

Yes, GTS owners (me included) have the 'Little brother of GTR' stigma to combat when we're trying to build a car that is capable and quick in it's own right, but you have to balance things up. Do you want to spend all that money just to have two turbos? Most GTR's go to a big single anyway after they've gotten what they can out of the twin setup.

Like I said before, I totally understand the want/need to have a unique(ish) car, to make your baby stand out from the crowd, but you don't cut off your nose to spite your face.

[Fitzy]

Hi guys i belive it is being done as we speak twin ts on a 25

Fitzy

[Sciby]

Hi Fitzy, it's already been done before. Nismoboy stated before that his Silvia has a twin turbo RB25 in it...

[mambastu]

My S13 also has a twin turbo RB25 in it. Currently using standard R33 GTR turbos on it.

[scottman]

i wish my motor was that Clean omg what u do clean it with a Tooth bush

what do i clean my SR20 with I want it to look sick