370Z maximum speed specification

halogodx · 12-20-2011, 10:44 AM

Quote:

Originally Posted by m4a1mustang

The car is drag limited. It doesn't have enough power to push past 165-168mph.

If memory serves me right, I hit 160 in 5th gear or early 6th gear. That's in an auto, so I still have 6th and 7th to go. Videos with minister removed shows car topping out at 173 STOCK

m4a1mustang · 12-20-2011, 10:47 AM

Quote:

Originally Posted by halogodx

If memory serves me right, I hit 160 in 5th gear or early 6th gear. That's in an auto, so I still have 6th and 7th to go. Videos with minister removed shows car topping out at 173 STOCK

173 is probably possible with a tailwind. With calm wind and a flat surface you aren't getting over 170. There just isn't enough power to overcome the drag.

Not to mention it will take forever to get to that speed.

nmjaxx9 · 12-20-2011, 10:50 AM

hmm interesting my auto is capable of such speeds? never knew.

AlexRaymond19 · 12-20-2011, 10:40 PM

Quote:

Originally Posted by m4a1mustang

The car is drag limited. It doesn't have enough power to push past 165-168mph.

Wait i dont get it... I read your posts after and you are saying it is rev limited, yet you also say its drag limited.... Every car is drag limited once the rev limiter is off... If it is drag limited then why were my rps not even close to redline at 154MPH?

Red__Zed · 12-20-2011, 10:51 PM

Quote:

Originally Posted by AlexRaymond19

Wait i dont get it... I read your posts after and you are saying it is rev limited, yet you also say its drag limited.... Every car is drag limited once the rev limiter is off... If it is drag limited then why were my rps not even close to redline at 154MPH?

electronically limited from the factory to ~155mph.

It is drag limited to about 165, give or take.

to the bolded part--drag limited means you can't run the car to redline because there isn't enough power to overcome the drag....

m4a1mustang · 12-20-2011, 10:51 PM

Quote:

Originally Posted by AlexRaymond19

Wait i dont get it... I read your posts after and you are saying it is rev limited, yet you also say its drag limited.... Every car is drag limited once the rev limiter is off... If it is drag limited then why were my rps not even close to redline at 154MPH?

I think you're just misunderstanding me.

In terms of real world top speed (with the speed limiter removed) it is drag limited to around 168 mph. At that speed there is simply too much drag for the engine and gearing to overcome.

In stock form, the car is limited to around 155 mph. This could be a rev limit *IF* that's the type of governor used... where the ECU says "I'm going to cut fuel at X RPM in top gear where X RPM = 155 mph or thereabouts."

AlexRaymond19 · 12-20-2011, 11:07 PM

Quote:

Originally Posted by m4a1mustang

I think you're just misunderstanding me.

In terms of real world top speed (with the speed limiter removed) it is drag limited to around 168 mph. At that speed there is simply too much drag for the engine and gearing to overcome.

In stock form, the car is limited to around 155 mph. This could be a rev limit *IF* that's the type of governor used... where the ECU says "I'm going to cut fuel at X RPM in top gear where X RPM = 155 mph or thereabouts."

okay gotcha, i see what you mean now

Flushnismo · 12-20-2011, 10:57 AM

Okay I'm not sure how this is possible but I've hit 172. The only mods I had were drop in filters, a full exhaust, HFC and it was dropped quite a bit. I'm also at a very high altitude though...don't know if that has anything to do with it. I bought the car with 2k miles and it appeared stock inside and out...and I've never got a tune or removed the limiter. This makes me wonder if it was modified before I bought it..

m4a1mustang · 12-20-2011, 11:01 AM

Quote:

Originally Posted by Flushnismo

Okay I'm not sure how this is possible but I've hit 172. The only mods I had were drop in filters, a full exhaust, HFC and it was dropped quite a bit. I'm also at a very high altitude though...don't know if that has anything to do with it. I bought the car with 2k miles and it appeared stock inside and out...and I've never got a tune or removed the limiter. This makes me wonder if it was modified before I bought it..

172 based on what? Speedometer?

FWIW HFC and CBE is a pretty big power bump... good for a couple-few mph on the top end.

Flushnismo · 12-20-2011, 11:04 AM

Yes that was just off the speedo give or take a mph. So I don't understand, is it limited from the factory or not?

m4a1mustang · 12-20-2011, 11:14 AM

Quote:

Originally Posted by Flushnismo

Yes that was just off the speedo give or take a mph. So I don't understand, is it limited from the factory or not?

Speedometer is wildly inaccurate. It could be off by 10% at high speed in some cases.

It is limited from the factory to 155 mph I believe. If you were truly going faster than 155 then yes, your car has had the limiter removed and might have a tune on it.

Are your current tires shorter than stock tire height? If they are then your speedometer is going to read faster than you are actually going... and at high speeds the margin of error is going to be even greater than when stock. So it's very possible that your 172mph indicated was under 155 actual.

b1adesofcha0s · 12-20-2011, 11:25 AM

Quote:

Originally Posted by m4a1mustang

Speedometer is wildly inaccurate. It could be off by 10% at high speed in some cases.

It is limited from the factory to 155 mph I believe. If you were truly going faster than 155 then yes, your car has had the limiter removed and might have a tune on it.

Are your current tires shorter than stock tire height? If they are then your speedometer is going to read faster than you are actually going... and at high speeds the margin of error is going to be even greater than when stock. So it's very possible that your 172mph indicated was under 155 actual.

So does the limiter cut you off based on what the speedometer says or what your actual speed is?

m4a1mustang · 12-20-2011, 11:27 AM

Quote:

Originally Posted by b1adesofcha0s

So does the limiter cut you off based on what the speedometer says or what your actual speed is?

It can work a number of ways. Not exactly sure how it works in the Z, but it could just simply be a rev limiter in top gear, or based off of the wheel speed sensors.

Flushnismo · 12-20-2011, 11:35 AM

Quote:

Originally Posted by m4a1mustang

Speedometer is wildly inaccurate. It could be off by 10% at high speed in some cases.

It is limited from the factory to 155 mph I believe. If you were truly going faster than 155 then yes, your car has had the limiter removed and might have a tune on it.

Are your current tires shorter than stock tire height? If they are then your speedometer is going to read faster than you are actually going... and at high speeds the margin of error is going to be even greater than when stock. So it's very possible that your 172mph indicated was under 155 actual.

I know for a fact I was going faster than 150, because I've been that fast in my last car and this felt way faster. Tires and wheels were stock with 20mm spacers all around, and the tpms were also removed. Awhile back I noticed it has a green bolt on the front of the engine.. looks like a ground. Thought maybe a grounding kit? I'll have to take a picture of it and see if you know what it could be. That was the only indication that it had be modified.

Red__Zed · 12-20-2011, 11:42 AM

Quote:

Originally Posted by Flushnismo

I know for a fact I was going faster than 150, because I've been that fast in my last car and this felt way faster. Tires and wheels were stock with 20mm spacers all around, and the tpms were also removed. Awhile back I noticed it has a green bolt on the front of the engine.. looks like a ground. Thought maybe a grounding kit? I'll have to take a picture of it and see if you know what it could be. That was the only indication that it had be modified.

that's not really the most scientific way to establish speed

12-20-2011, 10:57 AM	#8 (permalink)
Flushnismo A True Z Fanatic Join Date: Dec 2010 Location: Amarillo, TX Posts: 1,041 Drives: 2010 Boosted 40th Rep Power: 18	Okay I'm not sure how this is possible but I've hit 172. The only mods I had were drop in filters, a full exhaust, HFC and it was dropped quite a bit. I'm also at a very high altitude though...don't know if that has anything to do with it. I bought the car with 2k miles and it appeared stock inside and out...and I've never got a tune or removed the limiter. This makes me wonder if it was modified before I bought it.. __________________ AeroJacket l BC Racing l B&M l K&N l EVO-R l TWM Performance l Tanabe l AAM l Drop Engineering l Zenclosure

12-20-2011, 11:04 AM	#10 (permalink)
Flushnismo A True Z Fanatic Join Date: Dec 2010 Location: Amarillo, TX Posts: 1,041 Drives: 2010 Boosted 40th Rep Power: 18	Yes that was just off the speedo give or take a mph. So I don't understand, is it limited from the factory or not? __________________ AeroJacket l BC Racing l B&M l K&N l EVO-R l TWM Performance l Tanabe l AAM l Drop Engineering l Zenclosure

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12-20-2011, 10:50 AM	#3 (permalink)
nmjaxx9 A True Z Fanatic Join Date: Jul 2011 Location: Middletown, Ct Posts: 5,853 Drives: 2011 Nissan 370z Rep Power: 27	hmm interesting my auto is capable of such speeds? never knew.