370z Forced Induction for Noobs...

raymondo510 · 09-03-2013, 08:33 AM

Quote:

Originally Posted by Chuck33079

Get a compression test and an oil analysis. If all the numbers come back clean, go for it. There's no magic number where it's got too many miles to mod.

Cool thanks chuck

Squall180 · 11-28-2013, 11:17 AM

Thank you so much for the information I am thinking about inducing my 2014. This was a great place to start. I am still pondering supercharging or single turbo.

stiggy · 12-22-2013, 08:50 AM

Great write up. I live in a place where F I is a gamble at time of registration renewal. So im looking for the smallest SC in terms of physical size. My goal is to reach 500 whp for a DD. I will occasionally track the car but mainly its a dd. I appreciate any input

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SS_Firehawk · 12-22-2013, 11:39 AM

Well, this is an easy answer. The smallest is the GTM Stage 1.5 that will make your power goals.

stiggy · 12-22-2013, 02:58 PM

It does look small. Is there a known safe psi, given the stock engine compression ratio of 9.0:1? I think.

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Get Even...

Infidel · 12-22-2013, 03:02 PM

11:1

theDreamer · 12-23-2013, 07:25 AM

Quote:

Originally Posted by stiggy

It does look small. Is there a known safe psi, given the stock engine compression ratio of 9.0:1? I think.

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Get Even...

Forced Induction Finished Builds
Take a look at a lot of the finished builds, many guys well into the 500 with the 1.5 GTM kit and very safe. I am not running that much power, but I have the stage 1 SC from GTM with over 50k miles on the kit (71k miles total car) and around 400whp.

JWillis72 · 12-23-2013, 07:35 AM

Quote:

Originally Posted by theDreamer

Forced Induction Finished Builds
I have the stage 1 SC from GTM with over 50k miles on the kit (71k miles total car) and around 400whp.

Wow thats great you have that many FI miles. Any problems so far?

theDreamer · 12-23-2013, 07:43 AM

Quote:

Originally Posted by JWillis72

Wow thats great you have that many FI miles. Any problems so far?

Nope, just have a solid tune, good install, and keep up with maintenance.
The VQ37VHR is a very solid motor for boost it seems like, which is very good, you just have to monitor it for any odd occurrences.

JWillis72 · 12-23-2013, 05:22 PM

Quote:

Originally Posted by theDreamer

Nope, just have a solid tune, good install, and keep up with maintenance.
The VQ37VHR is a very solid motor for boost it seems like, which is very good, you just have to monitor it for any odd occurrences.

Glad to hear it since we are right around the same HP!

1slow370 · 01-15-2014, 09:42 PM

I posted this in another thread but it should be here too. An explanation of why headers and superchargers don't agree with each other. In a naturally aspirated engine with stock exhaust, the valve overlap on the engine allows the exhaust volume moving out of the head to scavenge the cylinder better allowing a greater intake volume to be pulled into the cylinder, it is timed up so that the valve closes before the intake charge begins to leave the exhaust valve. When you put headers on an NA car you improve the scavenging of the exhaust improving the intake charge to the point that just a little intake volume goes into the exhaust before the valve closes but the cylinder is filled with more intake charge regardless so it makes more power. On a supercharged car the intake charge is pressurized so that once the exhaust has vented enough that the cylinder pressure is equal to the intake pressure intake charge begins to flood out the exhaust valve long before it is closed, with a restrictor like a factory cat, or running a smaller exhaust diameter(2-2.5") with test pipes you allow manifold pressure to rise right at the critical point where the intake charge would over pressure the cylinder and flood out the open exhaust valve so the manifold back pressure holds the charge in.

This has been true for long before the 370z even came out, every supercharger kit manufacturer will warn about headers causing a loss in boost pressure, the fact is with a supercharger and the locked in cam timing the Z will make more power per cfm pumped into the engine with a restrictive exhaust. headers plus cam timing the way it is the engine wastes a large percentage of intake charge, so the header manufacturer tells you to get a bigger blower so that even though 10% of the intake charge is flying out the exhaust you will get your power back by shoving more in. The supercharger manufacturer tells you to put a more restrictive exhaust on the car so you waste less and get more pressure and power for the amount you spin the charger. In the end the both do the same thing you just have to pick whether you want headers and a more wasteful setup or a smaller setup that's more efficient.

Now if you can change the valve timing, grab your self some headers and turn the overlap down and enjoy the best of both worlds. Like I said none of this is new it's neither companies fault it's just the way it is, thats why back in the 60's a thing called a blower cam was invented.

Boosted Performance · 01-16-2014, 01:57 AM

Quote:

Originally Posted by 1slow370

I posted this in another thread but it should be here too. An explanation of why headers and superchargers don't agree with each other. In a naturally aspirated engine with stock exhaust, the valve overlap on the engine allows the exhaust volume moving out of the head to scavenge the cylinder better allowing a greater intake volume to be pulled into the cylinder, it is timed up so that the valve closes before the intake charge begins to leave the exhaust valve. When you put headers on an NA car you improve the scavenging of the exhaust improving the intake charge to the point that just a little intake volume goes into the exhaust before the valve closes but the cylinder is filled with more intake charge regardless so it makes more power. On a supercharged car the intake charge is pressurized so that once the exhaust has vented enough that the cylinder pressure is equal to the intake pressure intake charge begins to flood out the exhaust valve long before it is closed, with a restrictor like a factory cat, or running a smaller exhaust diameter(2-2.5") with test pipes you allow manifold pressure to rise right at the critical point where the intake charge would over pressure the cylinder and flood out the open exhaust valve so the manifold back pressure holds the charge in.

This has been true for long before the 370z even came out, every supercharger kit manufacturer will warn about headers causing a loss in boost pressure, the fact is with a supercharger and the locked in cam timing the Z will make more power per cfm pumped into the engine with a restrictive exhaust. headers plus cam timing the way it is the engine wastes a large percentage of intake charge, so the header manufacturer tells you to get a bigger blower so that even though 10% of the intake charge is flying out the exhaust you will get your power back by shoving more in. The supercharger manufacturer tells you to put a more restrictive exhaust on the car so you waste less and get more pressure and power for the amount you spin the charger. In the end the both do the same thing you just have to pick whether you want headers and a more wasteful setup or a smaller setup that's more efficient.

Now if you can change the valve timing, grab your self some headers and turn the overlap down and enjoy the best of both worlds. Like I said none of this is new it's neither companies fault it's just the way it is, thats why back in the 60's a thing called a blower cam was invented.

Sorry to say it, but this is kind of backwards. Without getting in to too much detail (it is too late for an old man like me), you will loose boost pressure by opening up your exhaust, that is true. However, you will gain power due to efficiently scavenging all the exhaust gases out of your combustion chamber. This will allow you to run cooler, and advance timing therefore making more power.

On a more common platform that uses supercharges such as Ford Mustangs, the upgrade to LTH and a free flowing exhaust will cause a 2psi drop, but at the same time will cause a 10-15whp increase, especially in the top end.

Remember, boost pressure is resistance to flow.

SS_Firehawk · 01-15-2014, 09:49 PM

Exactly why I was scared at first with my PPE's. (I think) My exhaust setup helps keep some needed back pressure. I still have a cat and the Tanabe is 2 3/4 at the Y.

1slow370 · 01-15-2014, 09:52 PM

so when are you going to pulley that thing down and shoot for 6XX haha

SS_Firehawk · 01-15-2014, 10:00 PM

When I have the balls and money to build the motor

It has a 92mm's and there are 84mm's available. That'd be an extra 100whp I'd imagine. I accept donations for any that are curious :P

12-22-2013, 08:50 AM	#3 (permalink)
stiggy Base Member Join Date: Nov 2013 Location: AD Posts: 11 Drives: 2014 370Z GT - Stock Rep Power: 12	Great write up. I live in a place where F I is a gamble at time of registration renewal. So im looking for the smallest SC in terms of physical size. My goal is to reach 500 whp for a DD. I will occasionally track the car but mainly its a dd. I appreciate any input --------------------- Get Even... __________________ ------------------------------------ Get Even... 14 PW 370Z - 07 Black E63 AMG

12-22-2013, 11:39 AM	#4 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	Well, this is an easy answer. The smallest is the GTM Stage 1.5 that will make your power goals. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

12-22-2013, 02:58 PM	#5 (permalink)
stiggy Base Member Join Date: Nov 2013 Location: AD Posts: 11 Drives: 2014 370Z GT - Stock Rep Power: 12	It does look small. Is there a known safe psi, given the stock engine compression ratio of 9.0:1? I think. --------------------- Get Even... __________________ ------------------------------------ Get Even... 14 PW 370Z - 07 Black E63 AMG

01-15-2014, 09:42 PM	#11 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	I posted this in another thread but it should be here too. An explanation of why headers and superchargers don't agree with each other. In a naturally aspirated engine with stock exhaust, the valve overlap on the engine allows the exhaust volume moving out of the head to scavenge the cylinder better allowing a greater intake volume to be pulled into the cylinder, it is timed up so that the valve closes before the intake charge begins to leave the exhaust valve. When you put headers on an NA car you improve the scavenging of the exhaust improving the intake charge to the point that just a little intake volume goes into the exhaust before the valve closes but the cylinder is filled with more intake charge regardless so it makes more power. On a supercharged car the intake charge is pressurized so that once the exhaust has vented enough that the cylinder pressure is equal to the intake pressure intake charge begins to flood out the exhaust valve long before it is closed, with a restrictor like a factory cat, or running a smaller exhaust diameter(2-2.5") with test pipes you allow manifold pressure to rise right at the critical point where the intake charge would over pressure the cylinder and flood out the open exhaust valve so the manifold back pressure holds the charge in. This has been true for long before the 370z even came out, every supercharger kit manufacturer will warn about headers causing a loss in boost pressure, the fact is with a supercharger and the locked in cam timing the Z will make more power per cfm pumped into the engine with a restrictive exhaust. headers plus cam timing the way it is the engine wastes a large percentage of intake charge, so the header manufacturer tells you to get a bigger blower so that even though 10% of the intake charge is flying out the exhaust you will get your power back by shoving more in. The supercharger manufacturer tells you to put a more restrictive exhaust on the car so you waste less and get more pressure and power for the amount you spin the charger. In the end the both do the same thing you just have to pick whether you want headers and a more wasteful setup or a smaller setup that's more efficient. Now if you can change the valve timing, grab your self some headers and turn the overlap down and enjoy the best of both worlds. Like I said none of this is new it's neither companies fault it's just the way it is, thats why back in the 60's a thing called a blower cam was invented. SS_Firehawk, warpeacelove, KratikosG37 and 1 others like this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

01-15-2014, 09:49 PM	#13 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	Exactly why I was scared at first with my PPE's. (I think) My exhaust setup helps keep some needed back pressure. I still have a cat and the Tanabe is 2 3/4 at the Y. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

11-28-2013, 11:17 AM	#2 (permalink)
Squall180 Base Member Join Date: Aug 2013 Location: Las Vegas Posts: 22 Drives: 2014 Nissan 370Z M/T Rep Power: 12	Thank you so much for the information I am thinking about inducing my 2014. This was a great place to start. I am still pondering supercharging or single turbo.

12-22-2013, 03:02 PM	#6 (permalink)
Infidel Enthusiast Member Join Date: Mar 2013 Location: Central Florida Posts: 457 Drives: 2013 GM 6MT Rep Power: 15	11:1

01-15-2014, 09:52 PM	#14 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	so when are you going to pulley that thing down and shoot for 6XX haha SS_Firehawk likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

01-15-2014, 10:00 PM	#15 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	When I have the balls and money to build the motor It has a 92mm's and there are 84mm's available. That'd be an extra 100whp I'd imagine. I accept donations for any that are curious :P __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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