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Stock Block HKS 7460GTII 91oct 23-24psi

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Old Aug 12, 2017, 01:29 PM   #16
kaj
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The flapper issue is a shame. Such an awesome turbo and i'd be looking for another, if not for that.
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Old Aug 12, 2017, 01:33 PM   #17
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The flapper issue is a shame. Such an awesome turbo and i'd be looking for another, if not for that.
they fixed the problem. The new ones are fine, its not to late.
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Old Aug 12, 2017, 01:41 PM   #18
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I have read they still have issues with the flapper arm loosening and with surging. There are a couple threads on lancerregister full of people that have bricked these turbos.
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Old Aug 12, 2017, 01:43 PM   #19
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I have read they still have issues with the flapper arm loosening and with surging. There are a couple threads on lancerregister of people that have bricked these turbos.
ah really? Damn thats a bummer. If mine ever does fail i was planning on picking up another. Guess ill have to plan for other options.
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Old Aug 12, 2017, 01:47 PM   #20
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Well you can get a Blouch 1.0Xtr or BB 71HTA from Owens Development for around the same money. Both of which have proven more reliable.
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Old Aug 12, 2017, 01:49 PM   #21
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HKS, and a number of owners, claim better than stock spool /shrug https://www.hks-power.co.jp/en/produ...turbo/db/12542
If its larger then stock its not going to out spool the stock turbo. From what I've seen when you have a properly set preload on the stock turbo and WGA its not going to out spool the stock turbo. Of course the wheel designs are more aero efficient im sure, but hks was just marketing their product.

Its not a bad little turbo, and they rarely get shared, that's why I shared it. This one probably needs the WGA preloaded more or something of that nature. I was more impressed with its peak #'s on 91oct then anything thats why I decided to share to give some old school mixed results.

I like to share cars based on their setup. If i feel like others will enjoy seeing it ill share it. I have a stock turbo result ill share soon also that made decent power on low octane with meth.

This car was averaging about 20psi by 3600RPM in 3rd.

(EDIT: I may be wrong and this car in particular I shared has the defective WG flapper issue)

Typical rule of thumb is if a turbos bigger its going to spool a little later. (However I'm not saying better aero in a lighter billet wheel design cannot break this rule though).

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There was a combination of issues with the first gen that added together to cause the wastegate flapper to fail. They changed the metallurgy of the flapper on the revised "Kai" version. I have one of the original versions that came with the cams. So far i have not had any issues with the flapper, but I don't track it, and I check/adjust the actuator preload on occasion. Its been like 70k miles and like 6 or 7 years of Daily since I installed it.
That is impressive. 70K miles on it!
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- Stock Block/ECU (10.0 @ 146.11)(Scott)
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Last edited by tscompusa; Aug 12, 2017 at 03:04 PM.
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Old Aug 12, 2017, 01:59 PM   #22
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I dug up another car I did on the 7460GT II that does have a pretty nice spool Im sharing the logs below:

This one was a 2007 evo ix EDM back in 2012 I did (bc 272 cams). This is also 93 octane fuel.

This was in bar format in the log:






So this one here must of had a WG issue I shared.

One thing to note though this was done in march where its much colder outside, which will improve spool extremely.

--------------------

Found one more back in 2011 on 93oct:




Seems to me the average these are doing is 20psi by 3200 when starting pull at 2500RPM in 3rd, and around 25psi by 3500RPM.

Not to say these arent having the WGA issues also. I've done about 20 of these 7460GT2's and averaging the results pretty much.

I know back in the day people had to cut their actuator rods shorter also or it wouldn't even spool right, so these results are all over the place due to a various reasons.
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car #1: TSComp 2.4L BR Vband FF 6466 (10.26 @ 148.14 (3200lb) - E85 37psi)
car #2: 2009 GT-R FBO (10.81 @ 132.19 - 18psi / 93 octane)


- Stock Block/ECU (10.0 @ 146.11)(Scott)
- Quickest & Fastest HX40 Evo (9.73 @ 146.17) (Best MPH 148.95)(Josh)
- Highest TS FP Black 719.78WHP (Tom)
- 3425lb Evo IX 2.0L 6466 (9.86 @ 145.77)(Ronnie)


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Last edited by tscompusa; Aug 12, 2017 at 02:15 PM.
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Old Aug 12, 2017, 02:15 PM   #23
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So in your opinion, how does the 7460 spool compare to a stock 9 turbo? I can't recall any stock turbo dynos showing 23psi at 3200 rpm on pump gas.
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Old Aug 12, 2017, 02:40 PM   #24
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This is the fastest stock turbo i could find spool on my computer with a quick search:

Mods on this car are: 90 octane + meth

Full 3" TBE
ported aftermarket O2 housing
3.5" FMIC
upper/lower pipe (stock recirc BOV)
3" intake pipe k&n filter
Grimmspeed 3 port
Ported stock intake mani / exhaust mani / tb
kelford 272 cams
alcohol/water injection 50/50 /w torco additive to gasoline

Also note it has quite large cams for a stock turbo! stock cams will make it spool even quicker.



Raw data: (3rd gear) - graph from above

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car #1: TSComp 2.4L BR Vband FF 6466 (10.26 @ 148.14 (3200lb) - E85 37psi)
car #2: 2009 GT-R FBO (10.81 @ 132.19 - 18psi / 93 octane)


- Stock Block/ECU (10.0 @ 146.11)(Scott)
- Quickest & Fastest HX40 Evo (9.73 @ 146.17) (Best MPH 148.95)(Josh)
- Highest TS FP Black 719.78WHP (Tom)
- 3425lb Evo IX 2.0L 6466 (9.86 @ 145.77)(Ronnie)


EcuTek Master Tuner for Nissan GT-R

For Scheduling Remote Tunes please visit: TSCOMPTUNED

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Old Aug 12, 2017, 02:41 PM   #25
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Originally Posted by nemsin View Post
So in your opinion, how does the 7460 spool compare to a stock 9 turbo? I can't recall any stock turbo dynos showing 23psi at 3200 rpm on pump gas.
It spools great. Just make sure the flapper and wastegate are working properly and it looks to spool as good or dare I say better then a stock turbo can on a Evo IX.
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car #1: TSComp 2.4L BR Vband FF 6466 (10.26 @ 148.14 (3200lb) - E85 37psi)
car #2: 2009 GT-R FBO (10.81 @ 132.19 - 18psi / 93 octane)


- Stock Block/ECU (10.0 @ 146.11)(Scott)
- Quickest & Fastest HX40 Evo (9.73 @ 146.17) (Best MPH 148.95)(Josh)
- Highest TS FP Black 719.78WHP (Tom)
- 3425lb Evo IX 2.0L 6466 (9.86 @ 145.77)(Ronnie)


EcuTek Master Tuner for Nissan GT-R

For Scheduling Remote Tunes please visit: TSCOMPTUNED

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Old Aug 12, 2017, 02:49 PM   #26
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What is the correct flapper preload for KAI version?
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Old Aug 12, 2017, 02:54 PM   #27
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What is the correct flapper preload for KAI version?
I would just use the typical half circle with it or upgrade to a different WGA like a turbosmart with a heavier spring set. If the flapper itself is warped though, you have to remove the turbo and machine it and fix it.
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car #1: TSComp 2.4L BR Vband FF 6466 (10.26 @ 148.14 (3200lb) - E85 37psi)
car #2: 2009 GT-R FBO (10.81 @ 132.19 - 18psi / 93 octane)


- Stock Block/ECU (10.0 @ 146.11)(Scott)
- Quickest & Fastest HX40 Evo (9.73 @ 146.17) (Best MPH 148.95)(Josh)
- Highest TS FP Black 719.78WHP (Tom)
- 3425lb Evo IX 2.0L 6466 (9.86 @ 145.77)(Ronnie)


EcuTek Master Tuner for Nissan GT-R

For Scheduling Remote Tunes please visit: TSCOMPTUNED

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Old Aug 12, 2017, 03:39 PM   #28
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Mine reaches 16psi at 3000rpm
And 26psi by 3300rpm
On 91 but not in 3rd gear: it's in 4th

My 2 original(non Kai) never had an issue.
Still going strong- now bolting up to friends car.
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Old Aug 12, 2017, 05:32 PM   #29
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On 91 but not in 3rd gear: it's in 4th
.
That would explain it.
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Old Aug 13, 2017, 01:01 AM   #30
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I remember reading someone saying the hotside is more like a 9.8 not 10.5 like the stock IX turbo.
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