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Stock Block HKS 7460GTII 91oct 23-24psi

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Old Aug 11, 2017, 03:45 PM
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Stock Block HKS 7460GTII 91oct 23-24psi

This customers Evo IX from Canada put down some decent power on a very limited octane rating of 91oct.

full mod list:

Stock block /w 110K
HKS 7460GT2 turbo
ets manifold
maperformance test pipe
custom 3" catback with res and muffler
tomei downpipe
ets intake
3.5 inch ets intercooler
ets intercooler piping
3port
Precision 1200cc
walbro 255
Tephra v7 MAF /w ecuboost

Graph below:

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Old Aug 11, 2017, 05:33 PM
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Kinda off topic: Is 20psi at 3800+ RPM typical of these turbos? I used to have one, so just curious.
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Old Aug 11, 2017, 06:46 PM
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Im at 20psi at 3500 and 26 by 3800 and capping off at [email protected] 4000 3rd gear street pull. E85 though 300ft above sea level.

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Old Aug 11, 2017, 07:29 PM
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Cool, thank you. FP Greenish, but DBB. NICE
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Old Aug 12, 2017, 02:30 AM
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Now time to push more!
I did 490whp and 500wtq on e85
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Old Aug 12, 2017, 10:18 AM
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Mine did 29psi by 3300-3350.
I did not test & try what will it push on top, but conservative tune held 26psi to redline.
This on E85.

On 91 it pulled 26psi by 3300rpm, and was tuned to taper to 22-23psi on top.

Fftec in Hayward, running the most conservative Mustang Dyno along with GST Motorsports, pushed one to 440whp, and many to 425whp.
Stock E9 does 215whp on this dyno, for comparison.
This dyno reads spot on 15% lower then DJ.

Tom had good reason to keep this car conservative, surely.
Cooke be fuel or other issues.
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Old Aug 12, 2017, 01:04 PM
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One of the craziest setups i did with this turbo was back in 2013.

A 2.4L equipped with this turbo on hks cams.

Put down 566wtq




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Old Aug 12, 2017, 01:07 PM
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The HKS 7460 can spool faster than a stock 9 turbo and make more power up top. But they have been plagued with a number of issues that lead to early failures. If it was more reliable I would buy one.
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Old Aug 12, 2017, 01:11 PM
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Originally Posted by nemsin View Post
The HKS 7460 can spool faster than a stock 9 turbo and make more power up top. But they have been plagued with a number of issues that lead to early failures. If it was more reliable I would buy one.
Its larger then a stock turbo it cannot spool faster then a stock turbo.

BB doesn't make a turbo spool faster then stock either. All BB does is make your on/off (transient response) improve.

Also pulls done in 3rd. There is no 7460 GTII on 91oct hitting 26psi by 3300RPM in 3rd gear in 70-80F temps either.

Only place I could see 91oct with a 7460GTII doing that kind of boost downlow would be Alaska.

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

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Old Aug 12, 2017, 01:17 PM
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When I had mine, there were all these wild claims about how quick these turbos spooled. Mine was nowhere close, so I sold it, thinking something was wrong
god damn, the internet...
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Old Aug 12, 2017, 01:19 PM
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From what I remember they had a lot of issues with the wastegates going bad or something with the flapper warping im not 100% Its to long ago id have to go back to remember.

Some of them also locked up and needed full replacements from HKS.
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Old Aug 12, 2017, 01:20 PM
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Originally Posted by kaj View Post
When I had mine, there were all these wild claims about how quick these turbos spooled. Mine was nowhere close, so I sold it, thinking something was wrong
god damn, the internet...
Yep I remember it. Also the turbo came out the same time around the revised HKS 274/278 cams released I think. Ivey was the first to test the combination together.
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Old Aug 12, 2017, 01:22 PM
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Originally Posted by tscompusa View Post
One of the craziest setups i did with this turbo was back in 2013.

A 2.4L equipped with this turbo on hks cams.

Put down 566wtq




Thats a torque monster.
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Old Aug 12, 2017, 01:23 PM
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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
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Old Aug 12, 2017, 01:29 PM
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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.
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