Intake/exhaust/reflash question

SnakeBitten · 07-16-2009, 10:28 AM

Quote:

Originally Posted by Phimosis

Don't mean to be argumentative, but 108 trap seemed way too fast for a Z, so I googled MT and 370z and I see 13.3 @ 105.7.

On a retest comparo against the Mustang and Genesis coupe, it ran 13.3 @ 107.1.

I know this is quibbling in the details, but no 370z has ran a 12 second quarter mile and when they starting getting close to hitting the 12's, people will be quibbling over thenths of a second.

I love my Z, but they are just not that fast....At least until someone gets a forced induction kit to market.

Sorry man got my mags confused here is the link. Its was C&D. Also the auto did 0-60 in 4.6 seconds and did the 1/4 in 13.1 @ 108mph. That is the fastest time recorded yet for the 370z. Im betting that at a prepped track an Auto 370z will be close to hitting 12's @ maybe 109-110mph but Im probably being too optimistic. Teh mags dont test 1/4 at prepped tracks thus my argument for the 370Z doing better numbers at a dedicated 1/4 facility. This is all speculation however but with the C&D results it looks like a 12 sec bonestock 370z is at the very least a probability. Thus also my entire arguement as to why a full bolt on 370z may just give that V8 M3 a run.

2009 Nissan 370Z Automatic - Short Take Road Test - Auto Reviews - Car and Driver

wstar · 07-16-2009, 10:55 AM

A bone stock 370 straight off the showroom floor, of either transmission type, isn't going to hit 12's even in ideal circumstances. I find the C/D numbers questionable honestly. My runs were 13.4xx in the 7AT, and that was with bolt-on power mods (Gen 3 intake, headers, HFCs, CBE) at a DA of ~1500, on a really good track (Houston Raceway Park). Granted, I had some extra junk in the car (large bag of tools, etc) and didn't mess with my tire pressures, but still ...

SnakeBitten · 07-16-2009, 11:10 AM

Soo you got two tests. One with manual and the other with auto and both are low 13's at over 107 mph, on a typical unprepped non 1/4 track surface, and you still dont think this car has a probable 12.9 in it on a prepped track? All it has to do is knock out a good 60' time. 108-110 mph can be enough to hit a 12.9 if you kill the 60'. It may take one hell of a launch but its at least "possible" imho. But until its done cant really disregard what you have said either. I guess time will ultimately tell.

BTW you have Sport/Touring and auto. Maybe that little extra weight cost you a few 10ths? Maybe?

Car in this test I believe only had the sport package I believe and I have no idea what the da was where they ran.

wstar · 07-16-2009, 11:19 AM

Quote:

Originally Posted by SnakeBitten

Soo you got two tests. One with manual and the other with auto and both are low 13's at over 107 mph, on a typical unprepped non 1/4 track surface, and you still dont think this car has a probable 12.9 in it on a prepped track? All it has to do is knock out a good 60' time. 108-110 mph can be enough to hit a 12.9 if you kill the 60'. It may take one hell of a launch but its at least "possible" imho. But until its done cant really disregard what you have said either. I guess time will ultimately tell.

I'm not sure how they're getting those numbers, but they're not gonna happen on a completely showroom-stock 370Z on a real track. Perhaps they're using some method of estimation for their results that doesn't jive with a real track's timing methods.

SnakeBitten · 07-16-2009, 11:27 AM

Quote:

Originally Posted by wstar

I'm not sure how they're getting those numbers, but they're not gonna happen on a completely showroom-stock 370Z on a real track. Perhaps they're using some method of estimation for their results that doesn't jive with a real track's timing methods.

You may be right Ive heard one of them uses some form of correction factor. Not sure on the particulars of that other than it sounds liek they make up numbers based on variables instead of cold hard test numbers.

mpp9 · 07-16-2009, 04:14 PM

1/4 mile times depend alot on the climate, grip from the tires, reaction times and optimal rpm launch. I would say with the mods I listed earlier that from a roll it would give alot of cars on the road a run for their money. Very few cars weigh under 3400 pounds let alone under 3300 and push 400 hp. I'm not a drag king but it would seem obvious that itd be scary fast from a roll gunning it around 6000 rpm on the highway, hitting close to max hp at the 8k rpm rev limit and being able to use the cars max torque to catapult you through the next gear. Assuming the hp/tq curves from the dynos I've seen are correct and obeying speeds limits of course.

YellowStar · 07-16-2009, 07:39 PM

Quote:

Originally Posted by mpp9

1/4 mile times depend alot on the climate, grip from the tires, reaction times and optimal rpm launch. I would say with the mods I listed earlier that from a roll it would give alot of cars on the road a run for their money. Very few cars weigh under 3400 pounds let alone under 3300 and push 400 hp. I'm not a drag king but it would seem obvious that itd be scary fast from a roll gunning it around 6000 rpm on the highway, hitting close to max hp at the 8k rpm rev limit and being able to use the cars max torque to catapult you through the next gear. Assuming the hp/tq curves from the dynos I've seen are correct and obeying speeds limits of course.

Reaction times deciding 1/4 time aye?

wstar · 07-16-2009, 09:13 PM

Yeah RT doesn't matter for your 1/4 time, it only matters for beating the guy in the other lane.

G37Sam · 07-16-2009, 11:54 PM

Send her over to GTM and we'll see who's doors will be blown off lol

mpp9 · 07-17-2009, 03:42 AM

I'm pretty sure reaction times make a difference when you're quibbling over 1/10ths of a second in a 1/4 mile. A 2.1 vs 1.9 r/t could mean the difference between breaking the 12 sec. barrier and not. My point is that 1/4 mile times are too dependent on outside factors and nuanced skill. Case in point many 1/4 mile times in the track thread on this site in the upper 13's and even 14+. I can't say on this site that I'll be able to prove a modded 370's pulling power compared to an m3 but I can tell you it'd certainly be close.

Z eliminator · 07-17-2009, 08:56 AM

I took my 370 Z to the track for the Ontario Z Drag day at St. Thomas Dragway ( Canada) 2 weeks ago. My average pass was 13.42 @ 107.9. Its a 7 AT.
My car had 286 RWHP with a Stillen G3 intake. Base line was 266. Elevation was 785 ft.
If you look at the article were the car ran 13.1?. They rolled the car for the first foot.
The more runs i made the higher the times went. Having nitrogen filled tires I watched the tire presure go to 40 lbs. I did not let the nitrogen out as i have no way to replace it.
When i let the car cool for 1 hour it ran a 13.201 @ 103. ( i hit the limiter in 4th.) My fault!!. If i ran the tires at 26 psig it would have gone 12's easy. ) My slicks from my 2003 Z do not fit.
60 ft times!!!! 2.09 to 2.19 and higher. There is no way to get traction of the line.
My 0 to 60 mile times based on the 1/8 mile and trap times. 4.41 seconds with a 2.09. 60 ft time.
I have another modifation to the car. It has 4.08 gear in the diff. (i changed differenatal)
My next upgrades will be the stillen CBE, berk cats, headers, and a tune from Cob.
Sam at GTM will be making me a custom tune for my car when i send him the data.
I also removed the spare tire, tools and anything else that i could to lighten the car.
I tried to fit my RO Ja formula 5's on the car with 275 toyo's and i have to change the valve stem to clear the calipers. once this is done I can lower the air preasure in the rear tires and we will see what the car will do. I can cut189 to 1.90. 60 ft times with these tire.s With slicks my best time is 1.86.
Lets get back to the 13.1? run done by the magazine. Did they start there run 1 foot back of the startng line and tripped the lights from a moving start ?
That would make a big difference!!!
I would love to post my time slips but i do not know how to do ?
My time for the 370 is the quickist one to date.
Mt times are certified by the Ontario Z club of Canada.
The next drag day is in Septmber it will run 12's.
But its not a stock car from the dealer show room.
My current Z is a 2003 stillen 5 At that runs 13.09s
It is currently being updated to a GTM 4.2, stroker with 850 wolf TTBB with a SFR 5 AT.
tuned with a haltec. Sam at GTM is helping me with this project and he is agreat guy. Sam has my dyno charts for the 370 ( i emailed them to him). he did not belive that I got19.9 RWHP from the intake. He will be more that glad to back me up.
I feel that the 13.1? is not a true indication of what this car run's 13.4 to 13.5 is more like it. My oil temp was 104 C (217 F) the car needs an oil cooler.

CCCLXXZ · 07-17-2009, 10:40 AM

^^ Yeah, what he said!

gnarf · 07-17-2009, 10:47 AM

you wont come close to a m3. even modded .those things pull like the dickens after 110...on the track a modded Z mybe can take him...prob not..but mybe

KillerBee370 · 07-17-2009, 12:19 PM

You all need to have a little more faith in yer car! Besides, it's not a drag car. When I hear "track", I'm thinking something entirely different and frankly much more exciting.

wstar · 07-17-2009, 12:37 PM

Quote:

Originally Posted by mpp9

I'm pretty sure reaction times make a difference when you're quibbling over 1/10ths of a second in a 1/4 mile. A 2.1 vs 1.9 r/t could mean the difference between breaking the 12 sec. barrier and not.

Reaction time isn't part of your quarter mile time. You can wait for the light to go green, sit there for 5 seconds, and then take off, and still make the same 1/4-mile time you would normally. Reaction time is gauged separately, and the actual 1/4 starts when your front tire clears the second staging beam.

Quote:

My point is that 1/4 mile times are too dependent on outside factors and nuanced skill. Case in point many 1/4 mile times in the track thread on this site in the upper 13's and even 14+. I can't say on this site that I'll be able to prove a modded 370's pulling power compared to an m3 but I can tell you it'd certainly be close.

I think a modded (but still NA) 370Z can definitely get into the 12's, that's not the question. It's just a question of how much modding

. I've kinda been on hold for a couple months on new dyno runs and new 1/4-mile runs because I'm waiting to sort out my exhaust issue for good (hopefully in early August now). I think at that point with a little prep (remove junk from car and drop rear pressure, etc) I can get lower than my initial 13.4's, but probably not quite into the 12s. The upcoming tire and wheel change I'm making might push me into the 12s though, with the added grip and lighter rolling weight in the wheels, and lower gearing from shorter wheels.

But a stock 370Z, even with the most professional of drag racers behind the wheel, will not hit the 12s, period.

07-16-2009, 10:55 AM	#17 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	A bone stock 370 straight off the showroom floor, of either transmission type, isn't going to hit 12's even in ideal circumstances. I find the C/D numbers questionable honestly. My runs were 13.4xx in the 7AT, and that was with bolt-on power mods (Gen 3 intake, headers, HFCs, CBE) at a DA of ~1500, on a really good track (Houston Raceway Park). Granted, I had some extra junk in the car (large bag of tools, etc) and didn't mess with my tire pressures, but still ... __________________ 7AT Track Car! Journal thread / Car setup details

07-16-2009, 11:10 AM	#18 (permalink)
SnakeBitten Base Member Join Date: Dec 2008 Location: Midwood Posts: 232 Drives: 05 DBZ M6 Rep Power: 16	Soo you got two tests. One with manual and the other with auto and both are low 13's at over 107 mph, on a typical unprepped non 1/4 track surface, and you still dont think this car has a probable 12.9 in it on a prepped track? All it has to do is knock out a good 60' time. 108-110 mph can be enough to hit a 12.9 if you kill the 60'. It may take one hell of a launch but its at least "possible" imho. But until its done cant really disregard what you have said either. I guess time will ultimately tell. BTW you have Sport/Touring and auto. Maybe that little extra weight cost you a few 10ths? Maybe? Car in this test I believe only had the sport package I believe and I have no idea what the da was where they ran. __________________ Last edited by SnakeBitten; 07-16-2009 at 11:19 AM.

07-16-2009, 09:13 PM	#23 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Yeah RT doesn't matter for your 1/4 time, it only matters for beating the guy in the other lane. __________________ 7AT Track Car! Journal thread / Car setup details

07-16-2009, 11:54 PM	#24 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 20	Send her over to GTM and we'll see who's doors will be blown off lol __________________ '14 Viper GTS '08 RB'd G37S - Sold

07-17-2009, 08:56 AM	#26 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	I took my 370 Z to the track for the Ontario Z Drag day at St. Thomas Dragway ( Canada) 2 weeks ago. My average pass was 13.42 @ 107.9. Its a 7 AT. My car had 286 RWHP with a Stillen G3 intake. Base line was 266. Elevation was 785 ft. If you look at the article were the car ran 13.1?. They rolled the car for the first foot. The more runs i made the higher the times went. Having nitrogen filled tires I watched the tire presure go to 40 lbs. I did not let the nitrogen out as i have no way to replace it. When i let the car cool for 1 hour it ran a 13.201 @ 103. ( i hit the limiter in 4th.) My fault!!. If i ran the tires at 26 psig it would have gone 12's easy. ) My slicks from my 2003 Z do not fit. 60 ft times!!!! 2.09 to 2.19 and higher. There is no way to get traction of the line. My 0 to 60 mile times based on the 1/8 mile and trap times. 4.41 seconds with a 2.09. 60 ft time. I have another modifation to the car. It has 4.08 gear in the diff. (i changed differenatal) My next upgrades will be the stillen CBE, berk cats, headers, and a tune from Cob. Sam at GTM will be making me a custom tune for my car when i send him the data. I also removed the spare tire, tools and anything else that i could to lighten the car. I tried to fit my RO Ja formula 5's on the car with 275 toyo's and i have to change the valve stem to clear the calipers. once this is done I can lower the air preasure in the rear tires and we will see what the car will do. I can cut189 to 1.90. 60 ft times with these tire.s With slicks my best time is 1.86. Lets get back to the 13.1? run done by the magazine. Did they start there run 1 foot back of the startng line and tripped the lights from a moving start ? That would make a big difference!!! I would love to post my time slips but i do not know how to do ? My time for the 370 is the quickist one to date. Mt times are certified by the Ontario Z club of Canada. The next drag day is in Septmber it will run 12's. But its not a stock car from the dealer show room. My current Z is a 2003 stillen 5 At that runs 13.09s It is currently being updated to a GTM 4.2, stroker with 850 wolf TTBB with a SFR 5 AT. tuned with a haltec. Sam at GTM is helping me with this project and he is agreat guy. Sam has my dyno charts for the 370 ( i emailed them to him). he did not belive that I got19.9 RWHP from the intake. He will be more that glad to back me up. I feel that the 13.1? is not a true indication of what this car run's 13.4 to 13.5 is more like it. My oil temp was 104 C (217 F) the car needs an oil cooler. Last edited by Z eliminator; 07-17-2009 at 09:12 AM.

07-16-2009, 04:14 PM	#21 (permalink)
mpp9 Base Member Join Date: Apr 2009 Location: Pittsburgh Posts: 103 Drives: 2012 sti Rep Power: 16	1/4 mile times depend alot on the climate, grip from the tires, reaction times and optimal rpm launch. I would say with the mods I listed earlier that from a roll it would give alot of cars on the road a run for their money. Very few cars weigh under 3400 pounds let alone under 3300 and push 400 hp. I'm not a drag king but it would seem obvious that itd be scary fast from a roll gunning it around 6000 rpm on the highway, hitting close to max hp at the 8k rpm rev limit and being able to use the cars max torque to catapult you through the next gear. Assuming the hp/tq curves from the dynos I've seen are correct and obeying speeds limits of course.

07-17-2009, 03:42 AM	#25 (permalink)
mpp9 Base Member Join Date: Apr 2009 Location: Pittsburgh Posts: 103 Drives: 2012 sti Rep Power: 16	I'm pretty sure reaction times make a difference when you're quibbling over 1/10ths of a second in a 1/4 mile. A 2.1 vs 1.9 r/t could mean the difference between breaking the 12 sec. barrier and not. My point is that 1/4 mile times are too dependent on outside factors and nuanced skill. Case in point many 1/4 mile times in the track thread on this site in the upper 13's and even 14+. I can't say on this site that I'll be able to prove a modded 370's pulling power compared to an m3 but I can tell you it'd certainly be close.

07-17-2009, 10:40 AM	#27 (permalink)
CCCLXXZ Base Member Join Date: May 2009 Location: Chicago Suburbs Posts: 164 Drives: T/S/MB/6 370z Rep Power: 401	^^ Yeah, what he said!

07-17-2009, 10:47 AM	#28 (permalink)
gnarf Base Member Join Date: May 2009 Location: Jersey Posts: 160 Drives: G37 Rep Power: 16	you wont come close to a m3. even modded .those things pull like the dickens after 110...on the track a modded Z mybe can take him...prob not..but mybe

07-17-2009, 12:19 PM	#29 (permalink)
KillerBee370 A True Z Fanatic Join Date: Mar 2009 Location: So Cal baby! Age: 51 Posts: 5,964 Drives: with passion Rep Power: 321	You all need to have a little more faith in yer car! Besides, it's not a drag car. When I hear "track", I'm thinking something entirely different and frankly much more exciting.

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