04-26-2012, 05:36 AM | #15 |
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The Legamax is just an axleback, so performance gains are negligible.
I'd like to know if the muffler has chambers or is a free-flowing drilled pipe design. The % of backpressure reduction is not a very useful value, as it changes with the rpm you'd need to know how it changes. If you have that 60% reduction at 3000 rpm you won't have any torque left. I guess the Hi-Power is for FI engines. The only think that is interesting is the use of the Helmotz resonator in the Hi-Power system. The Y-pipe of the Hipower send the pipes almost backward, with very tight corners. I haven't seen a very clear picture of the car from below but I think there's a better way to do the separation of the flow between left and right. Where are the HKS parts manifactured? |
04-26-2012, 07:19 AM | #16 |
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The legalmax comes with both catback and axleback.
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04-26-2012, 06:16 PM | #17 | |
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Hey mate You are right in saying this exhaust has been designed mainly FI more specifically for their new GT Supercharger kit however will work fine on a NA engine as for the y piece it is a very similar designed to that used on the R35 GTR exhaust that they developed some years ago now. Finally all there exhaust are manufactured in house in Japan. hope this answers some of your questions cheers dave
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04-26-2012, 06:22 PM | #18 |
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Some more really cool products from the weekends HKS Premium day at Fuji Speedway. Was lucky enough to attend for the 3rd year running.
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04-26-2012, 08:11 PM | #20 | |
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I noticed that the y pipe was very sharp angled. I suppose moving high HP applications it probably would become and issue but for BPU I'm sure it would suffice. |
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04-26-2012, 08:44 PM | #21 |
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The supercharged drift car from HKS is making 400PS...
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04-26-2012, 09:06 PM | #22 |
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It's not unusual for SC'd cars to make around 70 HP and T'd cars to make 100 HP above stock so...
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04-26-2012, 09:08 PM | #23 |
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HKS managed to squeeze out 200 HP out of their Supercharged FA20. Mind you, they likely changed everything else too... (And lowered compression!)
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04-26-2012, 09:11 PM | #24 |
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Well, I was talking about "streetable" mods. Of course, it they went all be damned a lot more is possible, but how good it will be as a DD is pretty obvious. For me, I'd think that 40 - 60 HP increase for SC & T'd would be a good increase for a car that will double as a DD and part-time track car.
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04-26-2012, 09:14 PM | #25 | |
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04-26-2012, 09:52 PM | #26 |
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forgive my feeble and limited knowledge of these things but is the fisrt pic of post #18 extractors? :o
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04-26-2012, 10:12 PM | #27 |
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04-27-2012, 04:29 AM | #28 | |
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I'd guess you'd need a manifold for NA cars and a different one for FI cars. I'd go for a bigger stepped 4-into-1 manifold for track car, both NA and FI, to maximise the top end power above 4000 rpm. They don't seem to be much different from the stock manifold, exept for the absence of the 1st cat. What's written in the sign? |
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