gt2540 good for r33 gtr?

[viking]

i've spoken to a few people and the responce is 2530 are better for gtr than 2540.

perhaps for quick responce around a track but down the line wouldnt the 2540's be a better option?

[Morgs]

Best to do a search, but you'll find GT2540s are a little mistmatched for a stock(ish) motor, better off with GT2530s, GT-SS generally.

[Cefiro_PWA]

Best to do a search, but you'll find GT2540s are a little mistmatched for a stock(ish) motor, better off with GT2530s, GT-SS generally.

get 2530's .. i have a complete DVD all about the mines r34 GTR> goes for around 1 hour.

that thing is so nuts.. you guys havnt seen all of its glory YET!

2530's!!x2

[Highlander]

On the GT2540, the decision you have is what power do you want and what is your use - street, track or drag...?

I have 2x GT2540 and had HP drop off at 7000 rpm. I use it for street / track. Pressure management showed that the 3.5" Blitz turbo back exhaust was restricted at the cat and muffler. The turbos are at full boost by 4250 rpm. But...I have full forged internals.

Stock internals, I agree with Morgs. Stock you can push 330 wKW with a pair of GT2530s. But you cannot run this power reliably for track use - you will run lean in cylinder 6 and even with a power FC you will get pre-det once the engine bay, induction and track temperature rises.

If you plan for forged internals, increase intercooler and radiator size and add an oil cooler I would go GT2540s. You will run max HP spread from 5500 - 8500 with a 4" turbo back exhaust.

HL

[viking]

thanks for your reply guys. i hav stock internals and only plan for street use (weekends mainly) one guy told me the 2540's were quite laggy compared to 2530's which makes street driving terrible.

and that stock internals may not handle the full force of 2540's??

im getting my car dyno'd with

pod filter

exhaust (twin 2 1/2" all the way)

apexi cooler

pfc

for now hoping around 220awkw

my goal eventually be around 300-330 with the turbos, injectors,fuel pump.

[JAGR33]

On the GT2540, the decision you have is what power do you want and what is your use - street, track or drag...?

I have 2x GT2540 and had HP drop off at 7000 rpm. I use it for street / track. Pressure management showed that the 3.5" Blitz turbo back exhaust was restricted at the cat and muffler. The turbos are at full boost by 4250 rpm. But...I have full forged internals.

Stock internals, I agree with Morgs. Stock you can push 330 wKW with a pair of GT2530s. But you cannot run this power reliably for track use  - you will run lean in cylinder 6 and even with a power FC you will get pre-det once the engine bay, induction and track temperature rises.

If you plan for forged internals, increase intercooler and radiator size and add an oil cooler  I would go GT2540s. You will run max HP spread from 5500 - 8500 with a 4" turbo back exhaust.

HL

Full boost by 4250 rpm with 2540's???? Have you got a dyno graph to prove this?? Yet later in the post you say you get max HP spread from 5500 - 8500rpm??? I'm confused...

Also forged internals will not help you with response, its just stronger!!!

From talking to hundreds of people, 2540's are very laggy on a 2.6, and the response could well be non existant!!!!

[FATGTS-R]

If anything wouldnt forged internals decrease response? Due to making the rotating assembly heavier?

[viking]

so in theory lets say drag wouldnt the 2540's be a better choice because of the hi-rev launch?

[Sydneykid]

If anything wouldnt forged internals decrease response? Due to making the rotating assembly heavier?

I don't know about yours, but my forged internals are much lighter than the cast ones I replaced.

[Sydneykid]

so in theory lets say drag wouldnt the 2540's be a better choice because of the hi-rev launch?

Still dop off boost on the upchanges. It's all about the average power available/used on the run. The max power at one rpm point is irrelevant.

[Munna]

get 2530's .. i have a complete DVD all about the mines r34 GTR> goes for around 1 hour.

that thing is so nuts.. you guys havnt seen all of its glory YET!

2530's!!x2

Were can I get that DVD?

[viking]

well the main reason im asking is that my engine is getting rebuilt and i hav a pair of 2540's doing nothing at the moment. At the moment i really cant afford the 2530's so i figure the 2540's will be much better than the stock gtr turbo's? correct me if im wrong.

[Sydneykid]

well the main reason im asking is that my engine is getting rebuilt and i hav a pair of 2540's doing nothing at the moment.  At the moment i really cant afford the 2530's so i figure the 2540's will be much better than the stock gtr turbo's? correct me if im wrong.

What are you getting done to the engine? A bit of extra capacity will help the poor old 2540's. As would some more compression, a set of mild cams, gapless rings, ceramic coating the combustion chambers, exhaust ports and the piston crowns. Maybe power port the exhaust manifolds and a set of split dumps are a must (not those short ones, the combined dump and engine pipe style). Basically anything that makes more exhaust flow:cheers:

[viking]

when i got the car dyno'd i realised the rings were shot. couldn get much rwkw out of the little sucker. so to cut a long story short i need to rebuild the beast. forgies i reckon will be on the list!! make use of the 2540's no cash after the rebuild to get any thing else. perhaps raising the revs to 8500rpm should help them flow better.