6MT.net Infiniti G35/G37/GTR Community

nismike · 02-11-2008, 07:53 PM

Quote:

Originally Posted by patshea098

why supercharger versus turbo? i know sc qill take me off the line quicker cause no turbo lag.

and i want to keep the best gas mileage i can...and i know turbos are more MPG friendly and more efficient all around correct?

but if i were to go supercharger route...who makes the best kit/most power for the VQ engine

I found this on line, I was also curious about sc effiency etc. I have done a good bit of research on fi and I'm saving up for a vortech.

What is the MPG for a Nissan 350Z with a Vortech Supercharger?

I want to purchase a vortech supercharger for my 2004 350Z. I'm just wondering how much will the Supercharger affect my gas mileage? does anybody have this kit installed and can tell me what their exprience is with gas before and after the install?
Best Answer -

Good news is that I actually have an 04 350z with a Vortech Supercharger, and I own a supercharger company so I know a lot about this topic.

Around town just driving around normal you can expect the fuel economy to stay the same. If you do step on it and drive hard it will show an average of 19mpg on the meter that we have.

Now I took a couple trips to Las Vegas and when my car was stock besides exhaust it showed an average of 24mpg. Well, last year I did the same drive with the supercharger and I got an average of 32mpg. So the Vortech actually helped out during those long consistent drives.

Now the supercharger has been my car for around 2 years now and has been flawless. There are over 40,000 miles with the blower on and it is okay so please don't listen to the other guy.

As long as you stay in the lower boost levels of 6-9psi you will be pretty safe. The Vortech out the box will give you around 6-7psi and at this boost level it is safe and you will be able to beat the EVO's, and STI's out there.

Now Vortech does design their systems around stock applications so you DO NOT need to build up the bottom end to make it stronger or to lower the compression. As long as you run 91 or higher octane fuel and you stay below 9psi you engine will hold up.

On top of that since these systems are complete it will have all the proper fuel and tuning accessories so your engine will run perfectly.

Now, just to give you a heads up of how the supercharger works since the other guy is misleading. The supercharger works under vacuum. So basically your engine will feel stock when you are just driving around normally, however it will feel slightly more responsive since the supercharger is helping the engine produce HP. Now once you give the gas pedal a heavy load it will then switch from vacuum to boost and you will then see a major improvement in HP and torque, that will pin you into your seat.

The HP lost from a supercharger should not even be a factor since you will gain so much more…usually around 120 HP plus. On top of this since it is always forcing air into the engine…your engine will be more efficient since your engine will not have to work as hard to produce HP.

I know this from experience…since I ACTUALLY own a supercharged 350z =)

Here is a link to my car with the supercharger that you are talking about. I know you will love it.
http://www.superchargersonline.com/conte...

**GZire** · 02-11-2008, 09:19 PM

Quote:

Originally Posted by nismike

I found this on line, I was also curious about sc effiency etc. I have done a good bit of research on fi and I'm saving up for a vortech.

What is the MPG for a Nissan 350Z with a Vortech Supercharger?

.............................The HP lost from a supercharger should not even be a factor since you will gain so much more…usually around 120 HP plus. On top of this since it is always forcing air into the engine…your engine will be more efficient since your engine will not have to work as hard to produce HP.

I know this from experience…since I ACTUALLY own a supercharged 350z =)

Here is a link to my car with the supercharger that you are talking about. I know you will love it.
http://www.superchargersonline.com/conte...

I take exception with the quote you had found. I'm not really sure what the guy is getting at by saying the engine is "more efficient" with a SC. It still comes down to you needing more fuel and air to make more power. Yes the engine is more efficient as it can produce more torque-power per liter of displacement..............however you still need to feed more fuel to get there. SC always has parasitic losses and yes you outgain parasitic losses by dumping more fuel to burn in the increased air, however T/TT are more efficient as they use waste gases to power them.

Take the quote with a grain of salt.

patshea098 · 02-11-2008, 10:27 PM

well i dont need myt car top be a 1/4th mile machine

just something fun on the weekends to go to the strip

but be able to beat most cars at spot lights and on highway/back roads.

so say i was to forget the twin turbo....which would be the better choice on the VQ engine? Single turbo kit? or supercharger?

thatguy · 02-11-2008, 10:42 PM

I think the "efficient" he referred to is volumetric efficiency. Since air is being forced into the engine the VE exceeds 1 (boost) versus an N/A motor which is always below 1 (vacuum)

nismike · 02-12-2008, 06:31 AM

yea, there's not a lot of info floating around on the mpg after sc. not really a make or break factor me, but it would be a nice perk to get better highway mileage. So are you saying this is this guy is full of s..? I was kind of surprised when I read it. I was accually trying to find out how much mpg was lost with the sc. What is some of everyone's experiences/ opinions with sc mpg?

**GZire** · 02-12-2008, 02:55 PM

Quote:

Originally Posted by thatguy

I think the "efficient" he referred to is volumetric efficiency. Since air is being forced into the engine the VE exceeds 1 (boost) versus an N/A motor which is always below 1 (vacuum)

I have to believe that what he's saying too, but the way it's worded makes me think the salesman in him is trying to hook a customer.

**GZire** · 02-12-2008, 02:56 PM

Quote:

Originally Posted by patshea098

well i dont need myt car top be a 1/4th mile machine

just something fun on the weekends to go to the strip

but be able to beat most cars at spot lights and on highway/back roads.

so say i was to forget the twin turbo....which would be the better choice on the VQ engine? Single turbo kit? or supercharger?

You can pretty much put anything on the G and it's going to be faster than most things out there. TT, T, SC, or nitrous anything, just make sure the setup is properly tuned.

**GZire** · 02-12-2008, 02:57 PM

Quote:

Originally Posted by nismike

yea, there's not a lot of info floating around on the mpg after sc. not really a make or break factor me, but it would be a nice perk to get better highway mileage. So are you saying this is this guy is full of s..? I was kind of surprised when I read it. I was accually trying to find out how much mpg was lost with the sc. What is some of everyone's experiences/ opinions with sc mpg?

My mpg dropped about 1 mpg between stock and TT setup.

patshea098 · 02-12-2008, 04:27 PM

k so now deicision rests soley upon that im going with a 5AT

i mean the TT setup is going to be harsh on the auto...but if im only going WOT once or twice a week....shouldnt be bad.

i dropped the idea of a single turbo due to a larger turbo for just a single setup will have a bunch of turbo lag.

so im thinking maybe a stillen supercharger.

**GZire** · 02-12-2008, 05:02 PM

If you choose the appropriate sized turbo a single T shouldn't be really laggy. The most important thing you can do right now is find a good shop that understands what you want and can set up the car appropriately.

patshea098 · 02-12-2008, 07:03 PM

what is going to produce more power tho more effectivly? a SC or ST?

and i know a bunch of places aorund here that does cars very well...my friends dad owns High End Performance down here.

**GZire** · 02-12-2008, 08:37 PM

Always it's going to be a turbo. Turbos run off of exhaust gases. Superchargers run off of a belt driven by the motor. SC always have parasitic losses.

All FI have their advantages SC, T, TT, it's more about what do you want to do with your car and how much money do you have to spend.

Gilley · 02-13-2008, 08:21 AM

For an auto, SC is the best choice. Don't get the Stillen. It doesn't make as much power as the Vortech AND you have to get a new hood with it.

Since you'll be in Atlanta for school, call or stop by Forged Performance ForgedPerformance.com in Marietta and talk to the owner, Sharif. He's one of the most respected builders for the VQ in the country. He won't steer you wrong.

**GZire** · 02-13-2008, 02:47 PM

^^^Sharif has a good following and a good reputation.

patshea098 · 02-15-2008, 06:04 AM

thanks everyone for the information.

been alot of help