SuperChargers for 370Z

OKC370Z · 06-23-2010, 04:21 PM

You'll have enough traction issues with a centrifigul, install a roots and you will have instant boost and instant loss of traction. My experience in the past has me leaning towards the centrifugal mated with an engine that already makes good low end torque for it's linear power and a roots for an engine that does not have much low end torque and requires high revs to get moving.

Without traction on the street or strip you get:

Chris@FsP · 06-23-2010, 04:25 PM

Quote:

Originally Posted by OKC370Z

You'll have enough traction issues with a centrifigul, install a roots and you will have instant boost and instant loss of traction. My experience in the past has me leaning towards the centrifugal mated with an engine that already makes good low end torque for it's linear power and a roots for an engine that does not have much low end torque and requires high revs to get moving.

Without traction on the street or strip you get:

Good to see another Okie on here

Tronchaser · 06-24-2010, 11:54 AM

Quote:

Originally Posted by FailsafePerf

Good to see another Okie on here

Therer's a few of us around.

Chris@FsP · 06-24-2010, 12:39 PM

Quote:

Originally Posted by Tronchaser

Therer's a few of us around.

If you make it up to Tulsa stop by the shop!

Tronchaser · 06-24-2010, 01:30 PM

Quote:

Originally Posted by FailsafePerf

If you make it up to Tulsa stop by the shop!

Would love to if I'm up in the area... didn't you say you were installing a turbo on someones Z soon? That would be worth a looksee!

Chris@FsP · 06-24-2010, 04:51 PM

Quote:

Originally Posted by Tronchaser

Would love to if I'm up in the area... didn't you say you were installing a turbo on someones Z soon? That would be worth a looksee!

Right now we're doing a GTM TT on an '08 Nismo

OKC370Z · 06-25-2010, 06:44 AM

Quote:

Originally Posted by FailsafePerf

Good to see another Okie on here

Sorry, missed this earlier. I have emailed you and got a quote for install of a few things, amoung them the Stillen SC. I am in the process or sorting out the financial so I can come visit you in the future. I amy just stop by some day an check out the shop and talk with you.

Typical of the tuning industry I presue you are open on Saturdays?

MMC Racing · 06-23-2010, 08:19 PM

Quote:

Originally Posted by OKC370Z

You'll have enough traction issues with a centrifigul, install a roots and you will have instant boost and instant loss of traction. My experience in the past has me leaning towards the centrifugal mated with an engine that already makes good low end torque for it's linear power and a roots for an engine that does not have much low end torque and requires high revs to get moving.

Without traction on the street or strip you get:

How many Cobra, Lightnings, or ZR1's do you see swapping to centrifugal? If you have a traction problem you solve it with suspension, tires, and weight transfer, not by swapping blowers.

OKC370Z · 06-24-2010, 07:51 AM

Quote:

Originally Posted by MMC Racing

How many Cobra, Lightnings, or ZR1's do you see swapping to centrifugal? If you have a traction problem you solve it with suspension, tires, and weight transfer, not by swapping blowers.

Who said anything about swapping blowers? The intent of my statement above is for STREET applications. My opinion is that you're better off with a centrifugal rather than a roots type blower because of power delivery, based on what type of motor you have in the first place.

Small motors that make power at higher rpm levels will benefit more from a roots type blower due to lack of torque and power in the lower rpm range. larger motors with good torque characteristics benefit from using centrifiguls since they already have the torque and power down low and need help breathing on the top end.

Both supercharges will work and peform well but after owning both and in different applications I preffer the centrifugal with a motor like the 3.7 in the Z. And the reason why is becaue of traction, I don't have any desire to set my Z up like a drag car just to get better traction when I can make as much usable horsepower with a centrifugal as a roots and have more tractible power in the range I would use it.

Boosted Josh · 06-24-2010, 10:29 AM

Quote:

Originally Posted by OKC370Z

Who said anything about swapping blowers? The intent of my statement above is for STREET applications. My opinion is that you're better off with a centrifugal rather than a roots type blower because of power delivery, based on what type of motor you have in the first place.

Small motors that make power at higher rpm levels will benefit more from a roots type blower due to lack of torque and power in the lower rpm range. larger motors with good torque characteristics benefit from using centrifiguls since they already have the torque and power down low and need help breathing on the top end.

Both supercharges will work and peform well but after owning both and in different applications I preffer the centrifugal with a motor like the 3.7 in the Z. And the reason why is becaue of traction, I don't have any desire to set my Z up like a drag car just to get better traction when I can make as much usable horsepower with a centrifugal as a roots and have more tractible power in the range I would use it.

I don't know about you but 3.7 liters is small in my book.

OKC370Z · 06-25-2010, 06:49 AM

Quote:

Originally Posted by Boosted Josh

I don't know about you but 3.7 liters is small in my book.

It's all relative as far as size and an engines characteristics. Myself, with the good torquedelivery and gearing of the 3.7 in the Z, I beleive the the centrifugal is the better choice for tractibility and control. I have had a few FI rods in my day and it is important to match the FI systems up with the the motor based on the characteristics of the motor i.e. cams, power delivry, before hp and tq levels and where in the power band their the strongest/weakest.

By no meas is the 3.7 a big torquey motor, but it does offer good torque down low and the gearing puts it in the meat of that torque pretty quick. So, to maintain a level of traction and control the centrifugal is the way to go in my book.

Boosted Josh · 06-25-2010, 11:12 AM

Quote:

Originally Posted by OKC370Z

It's all relative as far as size and an engines characteristics. Myself, with the good torquedelivery and gearing of the 3.7 in the Z, I beleive the the centrifugal is the better choice for tractibility and control. I have had a few FI rods in my day and it is important to match the FI systems up with the the motor based on the characteristics of the motor i.e. cams, power delivry, before hp and tq levels and where in the power band their the strongest/weakest.

By no meas is the 3.7 a big torquey motor, but it does offer good torque down low and the gearing puts it in the meat of that torque pretty quick. So, to maintain a level of traction and control the centrifugal is the way to go in my book.

You are right and I happen to like the way a centrifugal S/C makes power. But in most cases in a stop light to stop light situation positive displacement blowers win.

I guess it all comes down to what you are going for. Sometimes the lack of tractability is what is fun. I like having a car that can get squirly in 3rd or 4th on the highway, it doesn't make for good times around the track but it does make for good entertainment.

Actually the thing about the GTM S/C I like the most is the use of the Rotrex. It seems like it might be a good balance between the two.

MMC Racing · 06-28-2010, 10:39 AM

Quote:

Originally Posted by OKC370Z

Who said anything about swapping blowers? The intent of my statement above is for STREET applications. My opinion is that you're better off with a centrifugal rather than a roots type blower because of power delivery, based on what type of motor you have in the first place.

Small motors that make power at higher rpm levels will benefit more from a roots type blower due to lack of torque and power in the lower rpm range. larger motors with good torque characteristics benefit from using centrifiguls since they already have the torque and power down low and need help breathing on the top end.

Both supercharges will work and peform well but after owning both and in different applications I preffer the centrifugal with a motor like the 3.7 in the Z. And the reason why is becaue of traction, I don't have any desire to set my Z up like a drag car just to get better traction when I can make as much usable horsepower with a centrifugal as a roots and have more tractible power in the range I would use it.

We aren't driving 4 baggers here. Our engines are perfect for "roots" (using the term generically, I prefer twin screw). "roots" got a bad name the 350z world because Stillen used too small a model on the 350z (for clearance reasons probably, but still..). I guess ZR1 owners should be told their cars aren't trackable.

OKC370Z · 06-30-2010, 07:29 AM

Quote:

Originally Posted by MMC Racing

We aren't driving 4 baggers here. Our engines are perfect for "roots" (using the term generically, I prefer twin screw). "roots" got a bad name the 350z world because Stillen used too small a model on the 350z (for clearance reasons probably, but still..). I guess ZR1 owners should be told their cars aren't trackable.

NOT "Trackable" but Tractible - meaning problem maintaining traction particularly from a standing stop or low speeds when agressive on the throttle.

I'm sure a ZR1 would do just fine on a track whether during a track day or competing. Don't get me wrong I like roots (in particular) twin screws, it's just my opinion that for MY Z I would rather have the centrifugal for the street. I'm not a racer and never will be. I like my cars to perform on the street. And once again not that a roots would no peforma well on the street it's just that I prefer the centrifagul's characteristics over the roots for street application.

1slow370 · 07-01-2010, 04:01 AM

guys lets clear this up a bit they are called positive displacement superchargers. there are roots, twinscrew, and G-rotor or scroll types. centrifugals are all variable displacement. in know roots is easier to say but you confuse the newbs and are hard to understand when you mix them up. on that note positive displacement superchargers disagree with the vvel and open throttlebodies and it currently* cannot be done on our cars. variable superchargers only work because of their sh*ty performance characteristics at low rpms.

07-01-2010, 04:01 AM	#15 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	guys lets clear this up a bit they are called positive displacement superchargers. there are roots, twinscrew, and G-rotor or scroll types. centrifugals are all variable displacement. in know roots is easier to say but you confuse the newbs and are hard to understand when you mix them up. on that note positive displacement superchargers disagree with the vvel and open throttlebodies and it currently* cannot be done on our cars. variable superchargers only work because of their shty performance characteristics at low rpms. __________________ ANSWER PRICE LIST* Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

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06-23-2010, 04:21 PM	#1 (permalink)
OKC370Z Base Member Join Date: Jul 2009 Location: Oklahoma City Posts: 46 Drives: 09 370Z Grey Rep Power: 16	You'll have enough traction issues with a centrifigul, install a roots and you will have instant boost and instant loss of traction. My experience in the past has me leaning towards the centrifugal mated with an engine that already makes good low end torque for it's linear power and a roots for an engine that does not have much low end torque and requires high revs to get moving. Without traction on the street or strip you get: