I think for the price for the supercharger unit, R&D, would totally negate any benefits from a supercharger vs. turbo. The only major benefit (IMHO) from a supercharger is you got more hp and torque down low. I think doing the whole turbo package would be an easier way to go.

 

NO.

 

LS3 with a Whipple swap?

The little eaton's that stillen uses won't get the job done.

 

There is absolutely no point in swapping a supercharger for the GT-R's stock twin turbo system. The GT-R's turbo system is way more efficient to begin with. The turbo's are also placed extremely close to the combustion chamber, liimiting almost any boost lag. Also, a centrifical supercharger wouldn't supply enough torque for the GT-R's weight, at least low in the rpms. The roots/twin screw supercharger will end up producing too much heat, raising intake air temp, while robbing a lot of power from the motor to turn the supercharger lobes at 20,000rpm.

 

Yep, all those mustangs running around with twin screws don't make any power...

What do I know, I only put down 650rwhp/775rwtq on my twin screw supercharged 5.4L.

 

The bottom line is that the twin turbo system works better for the GT-R. I didn't see much of an argument from the get go, but hey whatever, I'm used to it lol. I'd also like to point out that Chevrolet decided to use a twin-screw in the ZR-1 after their twin turbo test mule caught on fire

 

Guess they were too fucking lazy to fix the cooling issues. That's the GM way. When a problem presents it's self, go around it.

 

audi went from twin turbo to v12 if im not mistaken cause it melted too. cooling issues with the turbos.

so how do all these turbo cars burn up? does the manufacture not know what they are doing?

 

that was just because the car didnt have enough room in the engine compartment. they were trying to shoehorn in the setup and it bit them in the ass. i found it quite amusing. german engineering, pfft.

 

im not sure if this was ever talked about previously. im sure i could do a search, but, im not going to. i think i know the answer is no, but what does everyone think?

will a supercharger mod work for the vr38 and would it be a benifit over turbos.

here is teh stillen 350z supercharger http://www.stillen.com/product.asp?id=STIS...;c=PE&m=all

I just got thinking of all the possibilities now that the R35 is out. what are some other extravagant mods you can think of that would be cool.

I think that is a fantastic idea, but it has to be done right.. VW currently uses both a supercharger and turbocharger in the FSI. By combing a regular turbo charged engine (something the German manufacturer's have indeed mastered) with a electronically controlled super charger (via an electro-magnetic clutch) and finally an extremely high pressure fuel delivery system that mists the fuel rather than a stream, they managed to get a 1.4L engine to deliver 170HP. Go test drive the new Golf FSI. It will blow your mind for how little it is....Pure Engineering Genius!

VW Develops Turbocharged and Supercharged Engine for Mass Consumption
http://car-reviews.automobile.com/news/vw-...nsumption/1414/

In the case of the GT-R, the turbo lag is virtually negligible by careful controlling/tuning of the gates, so I am not sure the VR38 can handle it, but it might sure be worth a try.

 

the logical course is to match the right pair of larger capacity turbos to this engine (and whatever else is needed to support them).

 

The technical spec limit on the OE tc is 1.4 bar. They come from the factory at 0.9 bar with some overboost in certain conditions. Still a lot left in the stock set-up, just the clutches to deal with........

 

Makes no sense to me to swap an SC in for a TT. As boost in increased in an SC (pulley swap), intake air temps start to increase significantly (even intercooled) raising hosts of other issues. The original Stillen (roots blower) for the 350Z was not intercooled and rapidly heat soaked the engine.

I use a centrifugal pulley driven ProCharger (intercooled) on the '03 350. Pushes 16 psi at 7,100 redline. Down here in south Texas 100+ degree summers, I can run some horrendous intake air temps despite intercooling. A roots blower would run even hotter. A couple summer afternoon track sessions and I'm swapping in new belts and throttle bodies (electronic TPS circuity gets toasted pretty quickly).

My Z32 is TT, and I like the ability to change boost levels on the fly through the controller by pushing one button.

If I start tinkering with the '07 350, it will go twin turbo. The VQ35HR twin intake is ideal for a twin turbo configuration.

 

I guess so.

I just do not see what you are trying to argue about.

 

i dont see the use. yes adding 2 superchargers is like adding more displacement - but the turbos spool up very quickly, and are very reliable (thus far - knock on wood) how do u know any SC would keep up with the demands you're trying to set?

 

Long story short... With the GT-R, I'd keep the twins and modify with the ability to control boost on the fly. You're not going to be going super high boost on the stock engine. I think 1.2 bar is about as high as I'd attempt with everything else stock. Above that will be major engine and fuel system rework. Even 1.2 bar may be a little aggressive, but I think doable. Clutches may be a bigger issue, and may require using 1.0 bar as upper stock limit -- we'll know the exact limits of everything as soon as someone blows something up.

 

big single

88mm? maybe 91mm?

 

1.4bar max? which tuners have got that high? how much horsepower does that make for the R35 (assume).

all i know is that the trans has a max capacity of 90kgm of torque before it dies... modify within a certain rms of that. seems around 70kgm give or take is really the RMS - the sweet spot... which when you see the amuse - around 611ps, and cobb also demostrated that a sweet spot is around that range too... they said anymore will not be as good and lag will set in aswell.

for the GT-R to get to a max of 90kgm of torque it would need new turbos like amuse made a debut for, but they have to massage the trans as a safe gaurd or it could go boom (tho they have been very reliable at 611ps - also cobb's trans been really good at around 590hp (give or take)).

This is exactly why i made this post about the supercharger. The engine is plasma coated and has pritty thin walls because of it. That will likly make a supercharger defunct - but im really not sure... but would a supercharger be able to replace the smaller turbos and come out on top to produce better?

basically should amuse use superchargers (any kind) instead of larger turbos? i figured it would have less lag with the supercharger, mabe more horsepower i dunno. of course it would have an intercooler of some type.