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Forced Induction Turbo, Supercharger, Methanol, Nitrous

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Old 08-27-2012, 11:24 AM   #67
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I would love to see the dyno graph, if this has typical SC spool and torque curves, then this would be my second favorite power adder (first would be full bolt-ons with cams). If/when I pull the trigger on an FR-S, I want to maintain the linear power and immediate throttle response of N/A, and SC does a better job of that than turbocharging.
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Old 08-28-2012, 02:40 AM   #68
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The kit is not available yet.

So far I know this - Boost is approx 0.6kg/cm2 on the kit but it has been fitted with an inlet air restrictor to limit airflow and power to 236PS as the plug in F-Con iS computer (pre programmed) and harness cannot control the chamber injector (only outboard injector in the intake runner). So with only extra fuel coming from the upstream injector only total power increase has been reduced to suit fuel flow. The engine itself is capable of up to 300ps (reliable) without modification same as the GT7040 Supercharger supplied in the kit without restriction.

So I'm trying to see if we can buy the kit less computer and harness for those that want to chase their own tuning solution which will allow a larger HP gain than the supplied F-Con iS piggyback. This has all come about because HKS haven't finished off their own flash tuner for the 86/BRZ yet so the kit had to be limited while running the F-Con iS computer. Even with the restrictor HP increased 28% and torque 33%.

As always I will post information when possible.

Below is a dyno graph and finished kit picture.
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Old 08-28-2012, 02:47 AM   #69
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No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?
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Old 08-28-2012, 02:55 AM   #70
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It maybe more of a limit of the tuning device. It could be the case when tuned properly by someone like Visconti with decent software that the dip would disappear
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Old 08-28-2012, 05:00 AM   #71
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wow the power gain is just a like a turbo... but still has the huge dip in the 3 -4 k rpm range :s...
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Old 08-28-2012, 05:12 AM   #72
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pft with 6500$ i could just put a downpayment on another FRS!!
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Old 08-28-2012, 05:42 AM   #73
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Quote:
Originally Posted by sw20kosh View Post
No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?
This kit relies on engine torque to spin the compressor. When there's less torque available at the crank, the compressor can slow down and push less air.

Turbos can get around this because they have no direct mechanical coupling to the crank.

-Justin
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Old 08-28-2012, 05:55 AM   #74
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Lots of love for the rotrex unit, but a little disappointed in the HKS pricing however.

A rotrex with the bracket with my own piping and a EcuTek would be mint and come out much cheaper...
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Old 08-28-2012, 06:45 AM   #75
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Quote:
Originally Posted by sw20kosh View Post
No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?

Thats not the FCon doing that Muahahah (evil laugh)
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Old 08-28-2012, 11:35 AM   #76
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Thats not the FCon doing that Muahahah (evil laugh)
your answers always leave more to be desired....
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Old 08-28-2012, 11:38 AM   #77
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Quote:
Originally Posted by Justin.b View Post
This kit relies on engine torque to spin the compressor. When there's less torque available at the crank, the compressor can slow down and push less air.

Turbos can get around this because they have no direct mechanical coupling to the crank.

-Justin
It actually uses engine RPM to gain its RPM. This is why the boost is tied to engine RPM and you dont make max boost till max RPM.

It has nothing to do with torque.

4k rpm = X rpm on the compressor so it is not a boost issue.
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Old 09-03-2012, 06:17 PM   #78
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Old 09-03-2012, 06:38 PM   #79
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You should send me a kit so I can stay HKS everything saving up for hyper coils and my HI-Power goes on this weekend I'll put the two biggest HKS decals you got on the car and get HKS tattooed on me lmao! So stoked for this kit.
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Old 09-03-2012, 07:51 PM   #80
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Quote:
Originally Posted by sw20kosh View Post
No offense to HKS but I don't like the torque dip and the loss of power 6200 rpm and up. (If that is a real representation of the dyno plot). All the turbo kits alleviate this problem why can't this kit do it? Is it a limitation of the tuning (Fcon)?
Thats pretty typical of SC. Broad powerband that falls off up top while turbos typically wont have as much down low but build with RPM's.
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Old 09-04-2012, 12:23 AM   #81
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It only falls off because they are using a restrictor in the inlet to keep the boost/flow in check at high rpm with a smaller SC pulley vs. killing the midrange with a really large SC pulley. If this SC was unrestricted, in would most likely make peak power at redline.
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Old 09-04-2012, 04:12 AM   #82
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No dipsy

Quote:
Originally Posted by uspspro View Post
It only falls off because they are using a restrictor in the inlet to keep the boost/flow in check at high rpm with a smaller SC pulley vs. killing the midrange with a really large SC pulley. If this SC was unrestricted, in would most likely make peak power at redline.
Yes to that

As for the dip, that is 99% likely to the short comings in the tuning product

With an ECUTEK tune that dip would disappear as the bit of manifold pressure plus good tune - be dip free curve
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Old 09-13-2012, 04:44 PM   #83
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I need to buy and install my own spark plugs?! Deal-breaker right there!!

@HKS Australia, what exhaust system is this kit tested with? Makes a big difference if it's being tested with a stock system or a Hi-Power system, stock header vs. aftermarket, etc.
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Old 09-13-2012, 10:23 PM   #84
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jackson racing and vortech may come up with a supercharger kit that i think could come cheaper than hks. that may be worth waiting for.
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Old 09-14-2012, 09:41 AM   #85
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We are supposed to be seeing the Vortech at SEMA if the rumors are true.
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Old 09-17-2012, 02:35 AM   #86
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I need to buy and install my own spark plugs?! Deal-breaker right there!!

@HKS Australia, what exhaust system is this kit tested with? Makes a big difference if it's being tested with a stock system or a Hi-Power system, stock header vs. aftermarket, etc.
Stock headers with HKS "Cat Back" exhaust.
Cheers
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Old 09-17-2012, 02:37 AM   #87
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Stock headers with HKS "Cat Back" exhaust.
Cheers
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Spec L or legamax?
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Old 09-17-2012, 02:43 AM   #88
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They don't actually specify which and I can't see either making a difference as neither will cause a restriction at this power level. The supercharger has an air inlet restrictor to limit power so the exhaust will still have plenty of flow left.
Cheers
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