Apexi AX53B60 turbos versus HKS 2530's for GTR

[JAGR33]

OK, done a search as per title and didn't find anything conclusive in regards to main differences in size, response, power etc....

Basically what are the main differences:

- size (what would the AX53B60 be equivalent to in the HKS range)

- which would be more responsive/which would be laggier

- which would give you more out right power

- cost

Obviously the 2530s are much more popular, but why is that??? power? response? price?

Any one have any experiences with both these turbos???

Any comments will be greatly appreciated.....

Cheers

[DoughBoy]

2530's have been around for ages compared to the new Apexi's. A user on the SkylinesDownunder forum (Tyndago?) has dealt with a car with the AX60's on it - it got 540awhp(~400awkw) with 280 deg cams on an RB26. They sound like a pretty good turbo though.

[Merli]

According to that chart taken from Option Magazine, they're equivalent to GT-SS/GT2510s... They should be good for 600ps, or just over 300kw @ wheels...

What I've heard about APEXi turbos are that they are AMAZINGLY fast spooling, but have weak shafts and are prone to damage when running decent boost.

That's not personal experience though, just what I've heard.

[Merli]

2530's have been around for ages compared to the new Apexi's. A user on the SkylinesDownunder forum (Tyndago?) has dealt with a car with the AX60's on it - it got 540awhp(~400awkw) with 280 deg cams on an RB26. They sound like a pretty good turbo though.

Take into account US dyno inflation and you have about 300-320kw @ all four

[DoughBoy]

Why are there 2 dots for the AX53B70P28?

[Merli]

Why are there 2 dots for the AX53B70P28?

Magical turbos

[JAGR33]

Great graph there Merli.....

So therefore according to the graph the equivalent to the 2530s in the Apexi range are the AX53B70P21's???

What's the pricing like on the Apexi turbos?? I noticed Doughboy has a set of the AX53B60's for sale for $3400, so therefore they're generally more expensive than the HKS equivalents (2510)??

[JAGR33]

Just reading the posts above, Merli claims these turbos are good for 300krwkws (400rwhp), whereas Doughboy claims hes seen 540 awhp.......

Are these turbos capable of 540 awhp???

[meggala]

thanks for that merli I 've been looking ofr the graph on the t518z's and I'm very pleased.

JAG look into the trust t517z's I ahve heard tremendous comments about them which would put them just above the 2530's PH from these forums runs them. they are non ball bearing and oil lines only no water lines write up in the latest gtr issue of hpi.

actually they list the twin 517's @ 600 hp

cheers

meggala

[JAGR33]

Cheers Meggala, but according to the graph the t517z are rated bigger than 2540's, does that mean they would be laggier than 2540's??? If that's the case I'll do without!!!!

But then again, just because they are rated at more PS does that mean they would be laggier ???

[Merli]

Just reading the posts above, Merli claims these turbos are good for 300krwkws (400rwhp), whereas Doughboy claims hes seen 540 awhp.......

Are these turbos capable of 540 awhp???

540awhp was made on an American DynoJet... Tyndago himself has written on his website that he's seen back-to-back testing comparing Australian and American dynos, and the American dynos read 17% higher than Aussie dynos.

540awhp = 402awkw

so 83% of 402awkw = 333awkw which is much more realistic.

[DoughBoy]

What's the pricing like on the Apexi turbos?? I noticed Doughboy has a set of the AX53B60's for sale for $3400, so therefore they're generally more expensive than the HKS equivalents (2510)??

The price I have on turbos is mainly based on condition of turbo(s). Rec retail on the AX's are 398,000Yen, so loosely convert that to $AU5,000. This is a loose figure not including shipping, gst/customs fees or even a discounted "sale" price. All of HKS bolt on replacement turbos are cheaper than the AX series, so one would hope that there is something exceptional about the Apexi's.

[JAGR33]

The price I have on turbos is mainly based on condition of turbo(s).  Rec retail on the AX's are 398,000Yen, so loosely convert that to $AU5,000. This is a loose figure not including shipping, gst/customs fees or even a discounted "sale" price. All of HKS bolt on replacement turbos are cheaper than the AX series, so one would hope that there is something exceptional about the Apexi's.

Yeah you would think the AX's would have to be as good, if not better than 2530s, but it seems they are not as popular. Is this the case in Japan aswell??? If the Mines 34 uses 2530s on their circuit car, surely they must be 'the bomb' in regards to response and power??? I dunno, but then again Mines might have special dealings with HKS instead of Apexi.... who knows.......

Basically just trying to see which turbos (HKS, Apexi, Trust) would be the way to go on my GTR in the next stage of modifications...... Looking more for response, streetable power and least lag.

Target = 350rwkws, but wouldn't mind hitting 400 after strengthening bottom end.....

[Steve]

Have a friend who just fitted an AX53B60 to his GTiR, is very, very impressed by the spoolup and midrange, but said top end seems to be a little lacking, when compared with the stock turbo.

He is still running stock injectors, ecu and cooler, with only an old model apex AFC, boost (1.2bar) and fuel pump.

Sorry, not really quantifyable results, he has e-manage, injectors z32afm waiting to go in, so hopefully in the not too distant future will have something a little more tangible.

[Autobacs]

The only way you would find out for sure is to drive a GTR from both setups which for most people, including myself, is not possible. The next best thing would be to rely on the opinion of people you trust. Based on information that I have solicited on both turbos, the Apexi AX53B60 has no performance advantage over the HKS 2530 to warrant its higher price when purchased new. If anything, Tyndago has said that the 2530's have slightly more output than the Apexi's. I do know that generally speaking, second hand 2530's go for a HIGHER price than used Apexi's AX53B60's at Yahoo auction Japan and they generate much more frenetic bidding activity. You can't go wrong with either turbo for the GTR but for the above reasons, I bought the HKS 2530's. Just my opinion.

[Autobacs]

The only way you would find out for sure is to drive a GTR with both setups which for most people, including myself, is not possible. The next best thing would be to rely on the opinion of "reliable" people that you know. Based on information that I have solicited, the Apexi has no performance advantage over the HKS 2530 to warrant its higher price as sold brand new. If anything, Tyndago has said that the 2530's have slightly more output than the Apexi's. I do know that generally speaking, second hand 2530's go for a HIGHER price than used Apexi's at Yahoo auction Japan and they generate more frenetic bidding activity. Based on that, I purchased HKS 2530's over the Apexi. Just my opinion.

[BU5TER]

Would the carboy graph Merli posted be HP at the wheels?

[DoughBoy]

Would the carboy graph Merli posted be HP at the wheels?

At the engine, in PS.

[jezzrrr]

rgw T51's 0n that graph are rated MUCH higher than either the Gtss or 2530's (if my reading is correct?). That artice in HPI rates them rather highly, I was looking at GtSS's but now considering these new Trusties

[ph1]

t517z are available with two different exhaust housing sizes, 8cm2 and 10cm2. the 8cm2 are roughly equivalent to 2530s.

t618z are the equivalent of the new HKS GT-RS, and are too big for a standard capacity RB26.

As meggala said they are oil cooled only, unlike the HKS range.