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Apexi Ax53b70 Or Hks2535

abu

By abu,
in Engines & Forced Induction

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abu Grand Master

abu

Posted
Posted

Hey

Upgrading turbo again on standard RB20 motor just wanted to know what would be a better option

I can either go with a Apexi AX53B70 or HKS2535 - both turbos in similar condition, for similar price and both come with split stainless dump pipes and braided lines

Anyways its not the cost I am worried about its the better suited turbo for the RB20

I am chasing around 230rwkw and have the following mods;

Apexi Power FC

Apexi AVCR

Blitz Intercooler

HKS adjustable CAM gears

GTR injectors

3" turbo back

BOSCH 040

I have seen a internally standard RB20 making about 230rwkw with the Apexi AX53B70 turbo but not sure on what boost and I'm aware there are a few members with standard RB20s cracking 230rwkw + with the HKS2535 on around 19psi

Anyways, I'm just after a comparison of the two and wondering whats a better suited combination for the RB20 with my supporting modifications

I'm aware the Apexi AX53B70 is rated at 370ps but whats the HKS2535 rated at, I've heard mixed responses

Any advise or past experiences would be appreciated

Thanks

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https://www.sau.com.au/forums/topic/219678-apexi-ax53b70-or-hks2535/
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rad100 Grand Master

rad100

Posted
Posted

abu i believe the apexi is rated at 420hp?? correct me if im wrong...

just rememebr i think the apexi still runs the ceramic rear wheel! so i have read 18psi is max??

with supporting mods they have seen to make 250 on an rb20 so plenty more for u!

as i have the same setup besides cam gears im looking at 220-240kw! but u will prob find the cam gears to help with some response!

good luck with ur choice!

cheers

Roy Grand Master

Roy

Posted
Posted

dont like your current setup? I would try the Apexi turbo myself. The results i have read with them are at least line ball with the 2530, and could be Just be sure you get the right housings, not the P22 etc as that sized housing would be overly laggy,

Also re the 230rwkws, it makes for a quick car. But the lag at 230rwkws isnt too different from the 450hp style turbos that will bag you 250rwkws with just about the same amount of response. You arelady have the injectors etc

Bunta Grand Master

Bunta

Posted
Posted

I had a AX53B70 P25 on my 25 and made 20psi by 3000rpm and 253rwkw my tuner often commented it was the most responsive turbo he had ever tuned , i would try it but check the exhaust housing around the wastegate hole, they can sometimes crack there

limpus Mentor

limpus

Posted
Posted

Having a 2535 myself i would say its a good thing...but funnily enough i was thinking of going with the apexi turbo with the rebuilt engine...

From the results i've seen on here they seem to be pretty similar...the 2525 is rated at 340ps from memory...but it probably makes abit more than that...personally i'd take some time and just pick the one which is in better nick...

abu Grand Master

abu

Posted
  • Author
Posted
well driving mine in the last 2 days i have found mine is hitting 10psi but about 4500-5000k which i think is abit high???

any ideas y??

Probably just needs to be tuned but thats still quiet high.. my T04e made 1 bar (14psi) by 4,500rpm and 18psi by around 4,700rpm

You have supporting mods I assume, cooler, turbo back exhaust etc?

AX-onevia Enthusiast

AX-onevia

Posted
Posted

I have used 2 Apexi AX53 turbos on my SR20 and had awesome results HOWEVER I have seen many of them failing due to the compressor wheel hitting the front housing and mashing the blades. This happened to both of mine and at least 3 others here in SA and they are unable to be rebuilt as you cannot obtain Apexi parts for them.

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