The Vortechs should be A LOT faster then 15K RPM. I believe a V1 and V2 Vortech SC core have a maximum threshold of 60K RPM and maximum efficient speed of like 55K. At 6LB it was spinning close to 50k if I recall correctly.

04 6MT Sedan - Z Tube, Stillen CAB, 04 Z Suspension

 

Roots-type SCs are great, but I'm with you on the hood bulge. No dice! Glad to see HKS stepping up, and I'm a little surprised that they're going the SC route instead of turbocharging.

As for the small intercooler, it doesn't need to be as large as a turbo set-up due to the fact that the exhaust isn't being routed right next to the intake side of the turbo, correct?


'05 IP(or ?) 6MT... ...Never too soon to think about modifications!!

 

BigRon wrote:
"As for the small intercooler, it doesn't need to be as large as a turbo set-up due to the fact that the exhaust isn't being routed right next to the intake side of the turbo, correct?"

Not really, the intercooler is just a heat exchanger. regardless of how the piping is routed its main purpose is to pull heat out of the incoming air. The better the efficiency and larger the size of the intercooler, the more it will cool the intake air. You don't need an intercooler for most low boost setups (supercharger or turbocharger), but it helps gain back a good deal of power and helps with reliability.

Turbos and Superchargers both heat up the intake charge. How much really depends on the boost level (how much heat due to the compression) and the efficiency of the compressor unit.

Justin @
EverythingG35.com
1.888.216.5328

 

I frankly cannot see any reason why someone would buy this rather than the Vortech. And for $7000, get the PE TT kit!!

--Steve

 

While the bigger the better concept with intercooling is generally true there are some downsides to having a huge core . . I'm not to familiar with s/c setups, but in the turbo world, obviously the bigger the core/tanks the harder it is to get the damn thing behind the bumper, secondly, if you notice the way the oem sedan aero bumper and coupe bumper is shaped, there isn't really much gain to have a huge intercooler because there isn't much air flow directly in the middle.and third the larger the intercooler, the more volume you've got to full with air before it gets to the motor - much more of a factor with turbo if you're looking for response - in the end I generally agree with BigRon and Justin, it's not 'necessary' either way, but hey, neither is anything else we do to our cars right?

 

the increase in heat has nothing to do with the location of the unit, or the fact that one of them runs off of exhaust gas (even though the charge air never sees the exhaust gas).

when you pressurize air, there is a natural rise in temperature. if you look at the ideal gas law: Pv = nRT, pressure (P) is on one side of the equation, and temperature (T) is on the other. when the pressure is raised, the temperature must be raised as well (this happens on its own, however). this has to be done to keep the equation balanced. we don't need to know about the other variables in the equation right now.

Sorry for the dorkness

 

yep, pressurized air has a natural rise in temp, but in simple terms, you can't tell me that routing intake air to the exhaust side of an engine, pressurizing it with something with a mechanical connection and high heat exchange (metal to metal) not to mention the simple friction heat build up of the turbo itself does not generate more heat than a supercharger?

I'm not arguing for supercharging or anything like that, but applying your equation to this application, these variables do come into play, including location, etc. if you choose to consider them . .

 

Right, the biggest possible setup isn't always the best, there are packaging and airflow issues to take into account as well.

Sorry to steer off topic with the HKS unit.... It looks very nice and compact, I'm anxiously waiting to hear the official word from HKS. =)

Justin @
EverythingG35.com
1.888.216.5328

 

good call, we totally veered from the subject . . .

anyway, also wanted to add that the support may have the same part number, but that does not necassarily mean it is in the same location from coupe to sedan - don't worry, they've checked the sedan, HKS just sold the sedan they owned . .

 

Pick the answer you like...

1) It won't fit the Sedan but it will fit the Coupe. All the part numbers may be the same, but the cars' engine bays are different. (Huh????)

2) The belt drive systems are different. (Even though the part numbers are the same?)

3) The difference has nothing to do with the earlier Sedans' mechanical fan. (Although this fan won't clear the SC's aluminum mount and belt drive system.)


DaveO

03 G35 AT Sedan / DP / Willow / Premium / Sport / Aero
350Z Air Duct, Eng Cvr & T-Stat / Stillen CAI
Crawford V-5 / GG 10-Wire Kit / TS ECM / E-Fans
Street Edge TC / B&M Cooler / Stillen Exhaust

 

How about that a turbo's turbine is turned by EXTREMELY hot exhaust gases. This turbine is part of the turbocharger and your intake charge comes through the turbocharger.

A SC is belt driven and it DOES generate extreme heat due to the velocity it spins at, but the turbo creates even more extreme heat due to its velocity and the fact that it's being spun by exhaust gas which is over 1000 degrees in some cases.

Also notice how a turbo CAN turn orange (as in freaking hot) under boost, S/C's don't typically change colors.

Almost every stock turbo car is intercooled where as nearly every stock SC'd car is not, call it what you will.

04 6MT Sedan - Z Tube, Stillen CAB, 04 Z Suspension

 

I agree, I swung us even further OT. Sorry about that.

FWIW, I wasn't talking about the intercooler pipes being run close to a turbo versus a SC, I was talking about the actual design of a turbo. I'm painfully aware of the heat generated by compressing air (got rid of my '97 GSX, boosted to 17-21psi, due to heat issues), but my point was that with a turbo seeing an exhaust side of the housing so close to the intake side, there is bound to be more of an issue with heat saturation with a turbo than a supercharger. While a SC increases heat in the intake charge, the unit itself doesn't act like a dehydrated nuclear reactor threatening every underhood component with extreme heat saturation.

Just making the point that the SC's small intercooler may not only be sufficient to deal with a supercharger's additional intake heat and it's associated underhood temps, but that it's small size may actually be more efficient in overall cooling because it allows the radiator to perform it's function without the additional stresses of decreased flow and higher underhood temps.

FWIW, I'm a big turbo fan! Loved mine!!! Just won't go with a high boost set-up again in such a hot enviroment. Now, if I lived up north... ... [img]/w3timages/icons/wink.gif[/img]

'05 IP(or ?) 6MT... ...Never too soon to think about modifications!!

 

Yea I agree with some everyone in here, HKS is gfreat with their products and this SC looks promising in the SC'n world, but I think the PE TT kit will outshine any FI product out. I read up on what gurgen had to say about it with minimal turbo lag and they are getting extremely high numbers to the wheels and crank. I think I would go with that over anything, or just a flat out TT set up over supercharge. My opinion, love the turbo's =)


Martin
2003.5 BS G35
Nismo Aero/Sport Package
Injen CAI
B+G Springs
ADR M-Classic 19's..

 

YOU BIG DORK...GO DRIVE YOUR G AND FEEL COOL AGAIN, CHAD!

2 G or NOT 2 G, there is no question!

Injen SES, Kinetix cats, K&N Typhoon, 19" PIAA Super Rozza's (19x9 & 19x10)

 

sorry....

....must resist urge to use math.........