This is a really great comparison, especially post #15.
Regarding the other parts changed some seem to be like-for-like, e.g. UICP, EBC & o2 housing.
There's probably some power in the SD intake, maybe a little more in the thicker IC, and the HKS cams are like S1.5's so the S2's probably make some top-end over them.
What's really strange to me though is just how hard the 7460 signs off @ 6800. Was there other stuff going on in your tune? Did the timing get dumped? A/F go super fat?

 

I don't think the timing was dumped, here's some old HKS dynos, it shows similar pattern.... on pump gas


HKS with stock IX cams


With HKS cams

 

Bringing this old thread back up. Running a limited power to weight class (like NASA TT3) where I need to make 350-360 awhp (dynojet) with the best spool and low end I can get, would the 7460 be the best bet?

 

The FP White would be a more reliable option IMO, and it's cheaper, and it makes tons of power. A stock evo 9 turbo will get you to that power effortlessly as well.

 

Here's what's left of my stock IX turbo:

https://www.evolutionm.net/forums/ev...rbo-issue.html

So a replacement is in order. And ball bearing seems to be the safest bet for road racing.

 

Oh..

Well the FP DBB stock frame turbos are out for the time being, so purchasing a new one is not an option.

The HKS GT2 I've heard too many nightmares about it, it's just not my cup of tea. It will get you to 360whp comfortably though.
I would consider something else such as the BBK.

 

All the stock frame turbos are likely to have the same thing eventually happen. Aftermarket turbo might suit him better. EFR7163 would be a great choice if ok for his class.

 

Anybody put one of these on an Evo yet?

 

In terms spool the GTII 7460 is simply phenomenal, it's faster in spool than any other aftermarket turbo that I know of, including the BBk & any DBB FP. Which makes it great for track use. I've tuned 2 GTII equipped Evos, one was 3 years ago, never had any issues, both are track cars.

 

Not sure, but I have one in my garage.

 

John
Clearly, going EFR requires a huge investment into full race turbo kit ($6K total?).
MrFred has an FP Green on the shelf, that you can take advantage of.

And as far as HKS goes, I am a huge fan of them, and had 2, now down to 1.
Only because on the newly built 2.3 the HKS proved way too responsive, trying to make 25psi at 2500rpm...now that is responsive.

The rumors that they had issues, etc...there have been maybe 3 actual HKS turbos that failed discussed on this forum, in my memory. 3 physical items over time, total. And mostly likely at last some of them failed due to over boosting. They are not meant for boost pressures in excess of 30psi.
To compare that to products from FP and CBRD, which suffered alarming rate of failure at some point, HKS is far ahead.
So I think you can put that notion to sleep...HKS is ultra reliable.

HKS is truly amazing on 2.0.
And if you are lucky you may score one used?

So with that said, you have an option of MrFred's FP Green on the shelf, and to buy new HKS 7460, or to wait until one pops up used.

For TT3 its the answer.
It makes easily 350whp on Mustang on 91, so a DJ 360whp is achieved at very moderate boost (maybe 22psi), for moderate back pressure and long reliable life.

Best of luck with our decision.

 

Nice results!

 

I sold my HTA Green quite a few months ago.

 

You have an HKS in your "arsenal" than?

I know somebody other than John, desperate for it...if you have it-John has first Dibs, and than if you and John would not mind- I'd like to send you my friend...of course John first.

BTW: I'll mention it here, that BBK-B on 2.3 is very similarly responsive as HKS is on 2.0.
Its a wonderful turbo, the BBK-B. Looks stock, so important in Cali...and the response/throttle control/diverter valve (smoothness, surge, etc) is just on the verge, which means that its about as responsive turbo you can have on 2.3 without surge issues.

When modulating the throttle I feel "hard" sign off (DV blowing off), its not a "smooth" transition like HKS on 2.0 with Tomei (Stock metal MR with stiffer spring) DV. And its the best that the Synapse with special soft Evo spring hooked up in Most-Responsive configuration (port B only, Port A open) in pull mode can master.

I wish HKS made 8282 for the E5-9, not only for the X.
Now that would be killer combination like BBK-B is.

 

Mychailo
Do you have direct comparison of HKS 274/278 cams to GSC S2?

I ask because in my humble opinion the S2 gain only above 6500rpm...And am curious to see the results...we can chat more offline.
But it would be maybe interesting for the curious gentlemen here to see the charts you have since you are so diligent in collecting data, which helps you and all of us.

Thank you.