Turbo Change, Same Power?

[UWISSH!]

I wana change my current turbo a t88-33d with 18cm housing to either a t51r kai or spl (depends on what i can get at a good price)

first up its on a stock capacity 2.6l but with all usual built bottom end and has some head work done aswell as a complete fuel system so it has all correct supporting mods

what i want to know is if i go and get the kai version will it make more power than my current turbo if they use the same boost level?

i dont want to go and buy the turbo n find out that it will still make the same power as i currently make.

i just love the sound of a t51r spooling up and t88's are quite an old turbo even tho mine has only done 13,000 kms

so yeh any help would be nice and i dont wana hear all the usual stuff like t51r shouldnt be on a 26 n its going to be laggy blah blah blah.

im used to lag with the t88, to me driving it around is still perfectly fine

[Super Drager]

T51R SPL should make more power, however i think the Kai T51R is rated to similar power to the T88-33D.

[UWISSH!]

yeh that was kinda my understanding, i think the spl non ball bearing with 1.0 rear housing was rated to about 900hp but i couldnt find a definative answer on the kai.

i think my t88 is rated to 750-800 hp

[N1GTR]

How hard have you pushed the T88 you've got now? Tried the larger rear? If you havnt tried over 25psi or so, turn it up more before buying a new turbo

Edit; T88 ratings are pretty typical Japanese, eg they'll say "800hp engine" but there's guys here making nearly that at the wheels with them.

[Lithium]

You aren't necessarily going to make anymore power unless the T88 was reaching its flow limit. Iirc the T88 is twin scroll, might be easier to go a GT4202R which is also twin scroll, sounds awesome an flows well

[UWISSH!]

yeh its the 18cm housing on a 33d.

high boost is currently set at 25psi. it pushed out 427kw on uni group dyno when i just did a power run. figure seems quite low in my opinion, also as said above love the sound of a t51r coming on boost

may seem stupid but i want more power lol

[Piggaz]

That does seem low. Is there other issues? Exhaust big enough? I doubt it's the turbo's fault....

[N1GTR]

If wanting more power is stupid, then a lot of us here are in trouble haha

It's worth moving max boost to 30psi for a run (Yavuz shouldnt need much convincing to do that haha), if that's not enough, try the larger reared 34D - that will put a smile on your dial. Or, when you're totally crazy, throw a GK on there.....i'll come watch that dyno run

As nice as a T51R sounds, I'd be taking a GK over a T51R every day of the week. Who gives a shit about spooling noise when you're putting close to 1000rwhp to the floor

[UWISSH!]

That does seem low. Is there other issues? Exhaust big enough? I doubt it's the turbo's fault....

i have a full 4" exhaust from turbo back so there is no restriction there.

cant run e85 as closest station to wollongong is heathcoate (half hour away)

yavous didnt tune the car either, croydon did, only did a power run at unigroup

[Aggroman]

yavous didnt tune the car either, croydon did, only did a power run at unigroup

there's your problem

[UWISSH!]

dont realy get where the problem is? one of the most reputable tuners/ engine builders in the country

[Aggroman]

doesn't mean its good though does it.. I'm thinking of Sx developments s15 with a bolt on turbo spanking jet200 as an example..

anyways I dont want to be OT so back to the discussion

[Lithium]

As nice as a T51R sounds, I'd be taking a GK over a T51R every day of the week. Who gives a shit about spooling noise when you're putting close to 1000rwhp to the floor

Isn't a 38GK no better flowing than a T51R SPL BB but laggier? Haven't experienced both back to back but its certainly the impression I have from other results I have caught wind of.

[Super Drager]

What about a HKS T62R?

[UWISSH!]

no there will be no t62 r.

wonder if i should take it somewhere else to have a look at what they think bout the power level

have seen people with very similar set ups to mine making 460kw+

[NYTSKY]

A friend of mine just did the same turbo swap.

T88 22cm to T51R KAI

They are closely matched power wise (500awkw+) however the 51R is 200rpm laggier.

Im going twin scroll with my T51R KAI

[UWISSH!]

what model t88? 34d or 38gk?

also is it still 2.6? what sort of other mods?

idealy id like to try n get close to the 480-500kw mark

[N1GTR]

Isn't a 38GK no better flowing than a T51R SPL BB but laggier? Haven't experienced both back to back but its certainly the impression I have from other results I have caught wind of.

I dont know back to back either regarding response/lag. Surely a tiny bit more lag one way or the other when you're talking this amount of lag isnt going to make too much of a difference. Asking a friend of mine who knows all things T88, the GK has been proven to do 1000rwhp - I'm not sure, and not feeling well from NYE so not going in search of T51RSPLBB figures, but isnt the T62R the one that competes with those numbers? Im a twin turbo kind of guy so not up to date on every single turbo spec

[N1GTR]

Chris I asked that same person who knows all about T88's about your setup. He's very confident that turbo at 30psi and maybe a touch more will get 480kw, his one makes 460kw at 27psi. I asked if you were to change to hit 480/500kw what would he suggest. 34D 22cm was the answer and it will have more left in it for when you're tired of that number, but even the 22cm rear on the 33D should get there he said without any worries as long as the rest of the car is right.

Unigroup dyno isnt a high reading one, it's pretty common knowledge it's a bit of a low reader. They focus on getting the engine running perfectly and having great drivability rather than just a high figure and sending someone on their way out the door.

[luke gtr]

They focus on getting the engine running perfectly and having great drivability rather than just a high figure and sending someone on their way out the door.

This I like. It's what matters, unless using for dyno comps of course....