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Bought A Hks 25-40 For My R33

Dean_HR31
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Dean_HR31 Mentor

Dean_HR31

Posted
Posted (edited)

Good afternoon,

Well I have done a search and not totally satisfied with the info i have recieved on peoples experience with the 25-40 as alot of it is related to people running it on the RB20's or on RB25's with half the supporting mods, so thought id start my own thread about peoples experience running this turbo with all supporting mods.

My motor is being rebuilt with forgies, gtr rods etc, 720cc injectors, pump, cooler, exhaust and the rest..

Will this turbo be laggy with a decent setup?? I will be running standard cams/heads with a microtech ecu.

Ive read through threads that this turbo is a little laggy but its mainly from people who arnt running all supporting mods or using the turbo on an RB20..

Im hoping for atleast 240rwkws and decent boost coming in from 3000rpm and onwards...

Any input on ur experience with this turbo on a well setup RB25 would be excellent.

Thanks

Edited by Dean_HR31
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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Its the worst turbo of the ball bearing brigade.

It makes a tad more peak power 2530, but with a much poorer midrange... so lag vs gain its not worth it.

Moral - the 2530 is the choice, then say a 2835 or similar, just skip the 2540 altogether, old design

Dean_HR31 Mentor

Dean_HR31

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  • Author
Posted (edited)

The 28-35 turbo was out of the question as i want a turbo that looks standard. Do not want to replace turbo in the case of an EPA.

And I couldnt find a second hand 25-30 for sale... Do they also look standard in size like the 25-40??

Edited by Dean_HR31
R31Nismoid Grand Master

R31Nismoid

Posted
Posted
The 28-35 turbo was out of the question as i want a turbo that looks standard. Do not want to replace turbo in the case of an EPA.

And I couldnt find a second hand 25-30 for sale... Do they also look standard in size like the 25-40??

2530's are the same, its the comp wheel thats different (and too big)

GCG hi-flow is what you should have purchased, perfect turbo for 250rwkw :thumbsup:

Or even a GT-RS or one of the other good options on the market

Dean_HR31 Mentor

Dean_HR31

Posted
  • Author
Posted

Obviously though a GCG hi glow wont be of the same quality of a HKS turbo!??

I want something reliable as my engine is costing me alot of money...

Ive heard nothing but excelent reliability from HKS turbos...

Dean_HR31 Mentor

Dean_HR31

Posted
  • Author
Posted (edited)

Can i just have someone confirm that the HKS 2530, 2535 & 2540 all look the same - stock size turbo looking..?

I am planning to put the heat shield back on with this turbo....

Thanks

Edited by Dean_HR31

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